CONSTANT HANGERS, CONSTANT SUPPORTS

PRODUCT GROUP

1

1.0

CONSTANT HANGERSCONSTANT SUPPORTS

Constant hangers and constant supports ____________________________1.1

Selection table __________________________________________________1.3

Constant hangers type 11 C3 29 to 11 96 25 __________________________1.5

Brackets for constant hanger type 11, type 71 C3 .9 to 71 96 .5__________1.6

Constant hangers type 12 82 35 to 14 96 35 __________________________1.7

Brackets for constant hangers type 71 82 .6 to 71 96 .8 ________________1.8

Constant supports type 16 D2 19 to 16 93 15 ________________________1.9

Angulating constant supports type 16 D2 29 to 16 93 25 ______________1.10

Constant hanger trapeze type 79 D2 25 to 79 96 25 __________________1.11

Function tests __________________________________________________1.12

Operational function______________________________________________1.13

Design features __________________________________________________1.15

Types of installation______________________________________________1.17

LISEGA servo hanger ____________________________________________1.19

Installation and operating instructions ______________________________1.21

CONTENTS PAGE

0

2

3

4

5

6

7

8

9

0

2

3

4

5

6

7

8

9

PRODUCTGROUP

11

CONSTANT HANGERS, CONSTANT SUPPORTS, PRODUCT GROUP 1

1.1

To avoid detrimental constraints in the system,thermal expansion in piping and other plantcomponents must not be prevented.

Constant hangersConstant hangers compensate for verticalmovement caused by thermal expansion. Via constant hangers, the respective pipingloads are constantly absorbed and transferredwith no significant deviation over the wholerange of movement.

Significant deviations would act as harmfuland uncontrolled extra loads in the system.

In this case, connection points are especiallyat risk because of unacceptable forces andmoments. It is vital that the constant hangers workreliably and efficiently, as this is decisive forthe operational safety and long life of thepiping system.

Constant hangers - the LISEGA systemFor nearly forty years LISEGA constant hangershave proven themselves convincingly in allkinds of operating conditions. The specialfunctional principle, based on the parallelogramof forces, is patented worldwide and hasfundamental significance in this respect.

Continued development of LISEGA constanthangers on this foundation has led to mat-ured products of superior quality with world-wide recognition.

See the sections Operational Function,page 1.13 and Design Features, page 1.15,in this regard.

Constant hanger type 11 52 25

LISEGA constant hangers installed

For the user, the following features of LISEGAconstant hangers provide special benefits:

1. Simple planning

standard cover for the respective load spectrum 10 - 112400 lbs [0.05 - 500kN], travel range up to 351/2 inch [900mm]

easy selection via load groups and travel ranges

clearly arranged type identification system facilitates orientation

symmetric and particularly compact designs of low installed weight

user-friendly planning documentation, such as informative catalogs, technical manuals and special publications

efficient LICAD design software, the special planning system for LISEGA standard supports

optimum fit within installation environ-ment via standard variants and acces-sories (e.g. constant hangers suspended,seated, as supports or trapezes)

only one load connection point for thesteel structure is needed

2. Easy installation

compact, symmetric designs with only one suspension point and practical installation aids

favorable weight performance ratios of the units reduce skeleton weight

precision fit attachment devices by way of standardized elements

intelligent travel stop enables easy conformity checks of set load and operating load

extra wide load adjustment ranges (40 - 100% of nominal load) permit lateradjustment in the event of deviation in piping weights

3. Reliable operational safety

due to the fundamental principle, abso-lute constancy over total set load range

reduced frictional forces through a minimum of bearing points - the load is transferred vertically via the main spring(no friction through high lever bearing loads)

operational travel runs straight through the symmetrical axis of the hanger, no load variations from radial deflection of the load distribution point (lever arm hanger)

attachment point and load point always lie in the symmetrical axis (no moment of force exertion on the connection structures through radial deflection)

lasting loadbearing performance through the use of specially treated prerelaxed springs

lasting operating performance through corrosion protection and maintenance-free special steel bearings

4. Easy monitoring

directly readable scales for travel position and operating load

permanent marking for cold/hot positions and set load

controlled subsequent load adjustment possible after installation

simple reinstallation of blocking devicesfor inspection work

1.2

Construction series 64

Construction series 72

Construction series 76

Construction series 85

The 4 development stages ofLISEGA constant hangers

1

LISEGA constant hangers are available at short notice

30

28

26

24

22

20

18

16

14

12

10

8

6

4

2

0

SELECTION TABLE

1.3

Constant hangers, constant supports

Trav

el (

inch

)

Load (lbs)

11 1511 2511 3511 4511 5511 6511 7511 8511 9512 8512 9513 8513 9514 8514 95

11 6611 7611 8611 9612 8612 9613 8613 9614 8614 96

11 1411 2411 3411 4411 5411 6411 7411 8411 9412 8412 9413 8413 9414 8414 94

11 D211 1211 2211 3211 4211 5211 6211 7211 8211 9212 8212 9213 8213 9214 8214 92

2755

109219438877

17553505526070108765

140201752521030262902804535055

51/4

101/2

153/4

21

261/4

3061

121243486972

19453885583077709715

155451943023315291503109538865

51/2

11

161/2

22

271/2

3366

133267533

10702135426564008535

10670170702133525605320053414042675

53/4

111/2

171/4

23

283/4

3570

140281562

11252250449567458990

11240179852248026975337203597044960

515/16

117/8

173/4

233/4

291/2

3774

147295591

11802365472570909445

11810189002362528345354353780047245

53/4

111/2

171/4

23

283/4

4079

159319638

1280255551057660

1021012765204252553030635382904084551055

51/2

11

161/2

22

271/2

4691

183367733

1470293558658805

1173514670234702934035205440054694558675

5

10

15

20

25

Type description Load (lbs)

Selection example: 5485 lbs / 101/2 inch

Intermediatevalues can beinterpolated

...2..(515/16 inch)

...3..(117/8 inch)

...4..(173/4 inch)

...5..(233/4 inch)

...6..(291/2 inch)

4385

171343686

1375274554858230

1097013715219502743532920411504389554865

51/4

101/2

153/4

21

261/4

11 C311 D311 1311 2311 3311 4311 5311 6311 7311 8311 9312 8312 9313 8313 9314 8314 93

1.4

1800022500

2700031500

3600040500

4500049500

5400058500

6300067500

7200076500

8100085500

90000

1Tr

avel

(in

ch)

Load (lbs)

11 1511 2511 3511 4511 5511 6511 7511 8511 9512 8512 9513 8513 9514 8514 95

11 6611 7611 8611 9612 8612 9613 8613 9614 8614 96

11 1411 2411 3411 4411 5411 6411 7411 8411 9412 8412 9413 8413 9414 8414 94

11 C311 D311 1311 2311 3311 4311 5311 6311 7311 8311 9312 8312 9313 8313 9314 8314 93

11 D211 1211 2211 3211 4211 5211 6211 7211 8211 9212 8212 9213 8213 9214 8214 92

in.

in.

4997

195391781

1565312562459375

1249515620249953124537490468654999062485

43/4

9 1/2

14 1/4

19

233/4

52103206414829

1660332066309945

1325516575265203315039775497255304066295

41/2

9

131/2

18

221/2

55109218438876

175535107010

105201402017525280453505542065525805609070105

41/4

81/2

123/4

17

211/4

58115230462924

185037007390

110901478018480295703696044350554405913573915

4

8

12

16

20

61121242486972

194538907770

116601554019430310953886546635582956218577725

33/4

71/2

111/4

15

183/4

64127254510

1020204040808150

122301630520385326154077048920611556523581540

31/2

7

101/2

14

171/2

66133266533

1065213542708535

128051706521335341404267551205640106828085350

31/4

61/2

93/4

13

161/4

70141281562

1125225044958990

134901798522480359704496053955674407194089925

215/16

515/16

87/8

117/8

143/4

93186373748

149529955990

119701796023940299354789559865718358980095790

119730

1

2

Load (lbs)

81163326654

130526155235

104551569020910261454183552290627457843583670

104580

2

4

in.

in.

in.

For the selection of constant supports type 16 (see 1.9 and 1.10 ), the load group and travel range of the corresponding hanger type 11 apply.

Loads 55 lbs [0.25kN] or 27 lbs [0.13kN] on request.

This range can only be set at the factory.

Total travel. Travel range 7 (36 inch) can be provided on request.

Type description

CONSTANT HANGER TYPE 11

1.5

Constant hangerType 11 C3 29 to 11 96 25Series-made standarddesign, available from stock.

Installation dimension Eapplies to the uppermost block-ing position.In other positions, E increases accordingly.

X = minimum thread engagement.On lower connection max thread engagement = X + 12 inch.

Order details:Constant hangertype 11 .. ..Marking:Operating load: lbsTravel: inch up/downBlocking position (if required):

A

133/4113/4161/4151/4161/4171/4181/4171/21819203/4171/2191/4203/4231/2193/4221/224 261/4231/428 291/4331/4281/232331/4343/445303/4331/2391/4453/4501/432371/4433/4471/4491/23443483/4491/2511/2

Type

11 C3 2911 D2 2911 D3 2911 12 2511 13 2511 14 2511 15 2511 22 2511 23 2511 24 2511 25 2511 32 2511 33 2511 34 2511 35 2511 42 2511 43 2511 44 2511 45 2511 52 2511 53 2511 54 2511 55 2511 62 2511 63 2511 64 2511 65 2511 66 2511 72 2511 73 2511 74 2511 75 2511 76 2511 82 2511 83 2511 84 2511 85 2511 86 2511 92 2511 93 2511 94 2511 95 2511 96 25

B

5 1/44 1/45 1/45 1/45 1/45 1/45 1/46 1/46 1/46 1/46 1/26 3/46 3/46 3/46 3/471/47 1/47 1/47 1/29 999

10 3/410 3/410 3/410 3/41111 3/411 3/411 3/4121212 1/212 1/212 1/212 1/212 3/413 3/413 3/413 3/41414

C

6663/451/251/251/26771/471/473/471/271/271/273/483/483/483/491/2

103/4103/4111/4111/4131/4131/4131/2131/2131/21515153/4153/4153/4151/4151/4153/4161/2161/2171/4171/4181818

d23/8 UNC3/8 UNC3/8 UNC1/2 UNC1/2 UNC1/2 UNC1/2 UNC1/2 UNC1/2 UNC1/2 UNC1/2 UNC5/8 UNC5/8 UNC5/8 UNC5/8 UNC3/4 UNC3/4 UNC3/4 UNC3/4 UNC

1 UNC1 UNC1 UNC1 UNC1 1/4 UNC1 1/4 UNC1 1/4 UNC1 1/4 UNC1 1/4 UNC1 1/2 UNC1 1/2 UNC1 1/2 UNC1 1/2 UNC1 1/2 UNC1 3/4 UNC1 3/4 UNC1 3/4 UNC1 3/4 UNC1 3/4 UNC2 UNC2 UNC2 UNC2 UNC2 UNC

d50.350.430.430.470.470.470.470.470.470.470.470.470.470.470.470.630.630.630.630.780.780.780.780.980.980.980.980.981.371.371.371.371.371.371.371.371.371.371.371.371.371.371.37

d60.350.430.43M10M10M10M10M10M10M10M10M10M10M10M10M12M12M12M12M16M16M16M16M16M16M16M16M16M20M20M20M20M20M20M20M20M20M20M24M24M24M24M24

E

20 3/413 3/421 1/214 3/425 1/236 3/448 1/415 1/425 1/237 1/447 3/415 1/426 1/238 1/449 1/217 1/229 1/442 1/45418 1/230 1/443 1/255 1/421 3/435 1/450 1/264 1/48024 37 1/454 67 1/484 3/427 3/445 64 3/482

101 3/43046 3/468 1/485

1061/4

X

1/21/21/21/21/21/21/21/21/21/21/23/43/43/43/4

111111/411/411/411/411/211/211/211/211/213/413/413/413/413/42222221/421/421/421/421/4

H

189 3/4

17 1/210 1/217 1/224 1/431 1/410 3/418253210 3/418 1/225 1/232 3/412 1/219 1/226 1/233 3/413 1/220 1/427 3/434 3/416 1/222 1/429 1/236 1/252 1/418253138 1/2562328 1/436 1/2446424 3/43137 3/443633/4

L

109

101/4111/4111/411 1/411 1/2133/4141/4141/4141/2141/4141/4141/4141/2153/4161/4161/4161/2191/4191/4191/4191/4223/4223/4231/2231/2231/2251/2251/2251/22626251/2251/2261/2271/4271/4291/2291/2301/4301/4301/4

O

11/2013/41

3/411

3/413/413/41

1/223/422141/421/421/211/441/4321/411/261/4643/46251/273/421/281/4281/2

125 93/4293/4

1593/4

111/2

P

101/273/4

1151/4

103/4123/4173/451/2

103/4121/21861/2

101/4141/2181/4101/493/4

141/2211/481/4

111/4161/4203/491/2

113/41418251/2111/4113/4153/4261/42813131/2151/4291/4331/2133/4141523311/2

Q

9 1/25101 1/26 1/28 3/4133/41 3/47 3/49 3/4141/41 1/47 1/4101/2141/25 1/48 1/4103/4182 3/48 1/2121/4161/43 1/4101/4121/415231/24 1/48141/4191/4261/24 1/211161/2231/2321/25 1/4123/419221/2321/4

R

13/413/413/433/833/833/833/833/833/833/833/843/843/843/843/841/841/841/841/841/25551/453/453/457/857/857/863/463/4771/471/477/877/877/877/877/875/875/875/875/875/8

D

4 1/43 1/24 1/44 1/44 1/44 1/44 1/45 1/45 1/45 1/45 1/45 1/45 1/45 1/45 1/466667 1/27 1/27 1/27 1/299999 1/4

10101010101010101010 1/410 3/410 3/410 3/41111

Weight(lbs)

312242335575

1154677

1061656095

13422397

146203331161253350467295403582743

1090430578833

12131520580802

112216122130741

1047149319002490

1.6

The 5th digit of the type des-cription indicates the design:6 for brackets bolted on,

standard specification.7 for loose brackets,

standard specification.8 for brackets bolted on,

nuclear specification.9 for loose brackets,

nuclear specification.

E in the uppermost blockingposition. In other positions, Edecreases accordingly.

Constant hangers can be mounted directly above the struc-ture and welded in place. Whendoing this, care must be taken toprovide access to the adjustingscrews and lock nut. If this access cannot be provided,type 71 brackets should be used.

Order details:Constant hanger type 11 .. .. with bracket type 71 .. .. (bracket bolted on) Marking:Operating load: lbs,Travel: inch up/downBlocking position (if required):

BRACKETS FOR CONSTANT HANGER TYPE 11

Brackets for constanthanger type 11type 71 C3 .9 to 71 96 .5Series-made standard design available from

stock.The brackets can be supplied ac-cording to require-ments.They can be shop fitted or supplied separately for sub-sequent fitting on site.

1

G1 K1 L32 14 1020 10 1/4 932 1/2 15 10 1/421 10 3/4 11 1/436 1/2 19 11 1/421 1/2 10 3/4 13 3/436 1/2 18 3/4 14 1/422 11 1/4 14 1/438 19 1/2 14 1/454 1/4 28 3/4 14 1/470 1/4 37 1/2 14 1/224 1/2 12 15 3/441 21 1/2 16 1/458 1/2 32 16 1/475 1/4 41 1/2 16 1/226 12 1/2 19 1/442 1/2 22 1/4 19 1/460 1/2 32 3/4 19 1/477 42 1/4 19 1/429 3/4 13 1/4 22 3/448 25 3/4 22 3/468 38 1/2 23 1/286 1/4 49 3/4 23 1/295 42 1/2 23 1/232 3/4 14 3/4 25 1/250 1/2 25 1/2 25 1/272 1/4 41 1/4 25 1/290 1/4 51 3/4 2697 1/2 41 1/4 2636 3/4 13 3/4 25 1/258 3/4 30 1/2 25 1/283 1/4 46 3/4 26 1/2

105 1/4 61 1/2 27 1/4114 1/2 50 1/2 27 1/439 3/4 15 29 1/261 1/2 30 1/2 29 1/287 1/2 49 3/4 30 1/4

109 66 1/4 30 1/4119 55 30 1/4

Lug for transport

Base plate

Detail Z

WeightM N T U y (lbs)151/2 - 1/4 2 1/4 1/2 11131/2 - 1/4 2 1/4 1/2 1118 - 1/4 2 1/4 1/2 18171/4 2 1/4 4 1/2 26181/2 2 1/4 4 1/2 3720 21/2 1/4 4 3/4 1/2 33201/2 21/2 1/4 4 3/4 1/2 4620 23/4 3/8 4 3/4 3/4 35213/4 23/4 3/8 4 3/4 3/4 5123 23/4 3/8 4 3/4 3/4 71253/4 23/4 3/8 4 3/4 3/4 88221/2 31/8 3/8 5 1/2 3/4 40251/4 31/8 3/8 5 1/2 3/4 64263/4 31/8 3/8 5 1/2 3/4 9029 31/8 3/8 5 1/2 3/4 108261/2 43/8 1/2 7 3/4 6631 43/8 1/2 7 3/4 93321/2 43/8 1/2 7 3/4 128361/2 43/8 1/2 7 3/4 15932 53/8 1/2 8 3/4 3/4 99353/4 53/8 1/2 8 3/4 3/4 137363/4 53/8 1/2 8 3/4 3/4 198381/2 53/8 1/2 8 3/4 3/4 247483/4 53/8 1/2 8 3/4 3/4 247341/2 53/8 5/8 9 1/2 3/4 123371/4 53/8 5/8 9 1/2 3/4 17643 53/8 5/8 9 1/2 3/4 234491/2 53/8 5/8 9 1/2 3/4 28254 53/8 5/8 9 1/2 3/4 282363/4 51/2 5/8 9 1/2 3/4 14342 51/2 5/8 9 1/2 3/4 201481/2 51/2 5/8 10 1/4 3/4 30652 51/2 5/8 11 3/4 406541/4 51/2 5/8 11 3/4 406391/4 51/2 3/4 10 1/4 3/4 181481/4 51/2 3/4 10 1/4 3/4 24054 51/2 3/4 11 3/4 357541/2 51/2 3/4 12 1/2 3/4 602561/2 51/2 3/4 12 1/2 3/4 602

C d4 E F6 1/2 10 1/2 1 1/26 1/2 5 3/4 1 1/26 3/4 1/2 10 1/2 1 1/25 1/2 1/2 5 3/4 2 1/45 1/2 1/2 10 1/2 2 1/47 1/2 5 3/4 37 1/4 1/2 10 1/2 37 1/2 1/2 6 37 1/2 1/2 10 3/4 37 1/2 1/2 15 1/4 37 3/4 1/2 20 38 3/4 1/2 6 3 1/48 3/4 1/2 10 3/4 3 1/48 3/4 1/2 15 1/2 3 1/49 1/2 1/2 20 1/4 3 1/4

103/4 3/4 6 1/4 3 1/2103/4 3/4 11 3 1/211 1/4 3/4 15 3/4 3 1/211 1/4 3/4 20 1/2 3 1/2131/4 7/8 6 1/2 4 1/4131/4 7/8 11 1/4 4 1/4131/2 7/8 16 4 1/4131/2 7/8 20 3/4 4 1/4131/2 7/8 13 1/2 4 1/415 1 7 4 1/215 1 11 1/2 4 1/2153/4 1 16 1/4 4 1/2153/4 1 21 4 1/2153/4 1 11 4 1/2151/4 1 1/4 7 4 3/4151/4 1 1/4 11 3/4 4 3/4153/4 1 1/4 16 1/2 4 3/4161/2 1 1/4 21 1/4 4 3/4161/2 1 1/4 10 3/4 4 3/4171/4 1 1/4 7 1/2 5 1/2171/4 1 1/4 12 1/4 5 1/218 1 1/4 17 5 1/218 1 1/4 21 3/4 5 1/218 1 1/4 10 1/4 5 1/2

Const h. BracketsType Type A1 B1

11 C3 29 71 C3 .9 16 1/2 23/411 D2 29 71 D2 .9 14 1/2 23/411 D3 29 71 D3 .9 19 23/411 12 25 71 12 .5 19 1/2 41/211 13 25 71 13 .5 20 1/2 41/211 22 25 71 22 .5 22 3/4 51/211 23 25 71 23 .5 23 1/4 51/211 32 25 71 32 .5 22 3/4 51/211 33 25 71 33 .5 24 1/2 51/211 34 25 71 34 .5 25 3/4 51/211 35 25 71 35 .5 28 1/2 51/211 42 25 71 42 .5 25 1/4 61/411 43 25 71 43 .5 28 61/411 44 25 71 44 .5 29 1/2 61/411 45 25 71 45 .5 31 3/4 61/411 52 25 71 52 .5 29 1/2 73/411 53 25 71 53 .5 34 1/4 73/411 54 25 71 54 .5 35 3/4 73/411 55 25 71 55 .5 39 1/2 73/411 62 25 71 62 .5 36 93/411 63 25 71 63 .5 39 1/2 93/411 64 25 71 64 .5 40 3/4 93/411 65 25 71 65 .5 42 1/4 93/411 66 25 71 66 .5 52 1/2 93/411 72 25 71 72 .5 38 1/2 103/411 73 25 71 73 .5 41 1/4 103/411 74 25 71 74 .5 47 1/4 103/411 75 25 71 75 .5 53 1/2 103/411 76 25 71 76 .5 58 103/411 82 25 71 82 .5 40 1/4 1111 83 25 71 83 .5 45 1/2 1111 84 25 71 84 .5 52 113/411 85 25 71 85 .5 55 1/2 121/211 86 25 71 86 .5 58 121/211 92 25 71 92 .5 43 1/2 113/411 93 25 71 93 .5 52 1/2 113/411 94 25 71 94 .5 58 1/4 121/211 95 25 71 95 .5 58 3/4 131/211 96 25 71 96 .5 60 3/4 131/2

1.7

CONSTANT HANGERTYPE 12-14

Constant hangers type 12 82 35 to 14 96 35Standard design, multi-cellhanger.Assembly possible at shortnotice from stock units.

Dimension E applies touppermost blocking position. For other positions E increasesaccordingly.

Order details:Constant hangertype 1. .. 35Marking:Operating load: lbsTravel: inch up/downBlocking position (if required):

Weight

+97

/ 8-2

3 /4

H L M N O P R R1max. S W (lbs)23 31/4 211/4 113/4 2 13 31/2 33/4 11/8 61/4 1355281/4 31/4 211/4 113/4 81/2 131/2 31/2 33/4 11/8 61/4 1805361/2 31/4 211/4 113/4 12 151/4 31/2 33/4 11/8 61/4 245044 31/4 211/4 113/4 5 291/4 31/2 33/4 11/8 61/4 343064 31/4 211/2 12 93/4 331/2 31/2 33/4 11/8 61/4 4455243/4 31/2 231/4 13 2 133/4 41/4 41/4 13/8 7 173031 31/2 231/4 13 93/4 14 41/4 41/4 13/8 7 2355373/4 31/2 231/4 13 15 15 41/4 41/4 13/8 7 325043 31/2 231/2 131/8 93/4 23 41/4 41/4 13/8 7 4070633/4 31/2 231/2 131/8 111/2 311/2 41/4 41/4 13/8 7 525023 31/4 33 2x113/4 2 13 41/4 5 13/8 81/4 2110281/4 31/4 33 2x113/4 81/2 131/2 41/4 5 13/8 81/4 2790361/2 31/4 33 2x113/4 12 151/4 41/4 5 13/8 81/4 375044 31/4 33 2x113/4 5 291/4 41/4 5 13/8 81/4 522564 31/4 331/4 2x12 93/4 331/2 41/4 5 13/8 81/4 6770243/4 31/2 361/4 2x13 2 133/4 43/4 51/2 13/8 9 267531 31/2 361/4 2x13 93/4 14 43/4 51/2 13/8 9 3610373/4 31/2 361/4 2x13 15 15 43/4 51/2 13/8 9 495043 31/2 361/2 2x131/8 93/4 23 43/4 51/2 13/8 9 6190633/4 31/2 361/2 2x131/8 111/2 311/2 43/4 51/2 13/8 9 797523 31/4 45 3x113/4 2 13 43/4 7 13/8 93/4 2870281/4 31/4 45 3x113/4 81/2 131/2 43/4 7 13/8 93/4 3780361/2 31/4 45 3x113/4 12 151/4 43/4 7 13/8 93/4 507044 31/4 45 3x113/4 5 291/4 43/4 7 13/8 93/4 703064 31/4 451/4 3x12 93/4 331/2 43/4 7 13/8 93/4 9095243/4 31/2 491/4 3x13 2 133/4 51/4 7 11/2 93/4 367031 31/2 491/4 3x13 93/4 14 51/4 7 11/2 93/4 4920373/4 31/2 491/4 3x13 15 15 51/4 7 11/2 93/4 671043 31/2 491/2 3x131/8 93/4 23 51/4 7 11/2 93/4 8360633/4 31/2 491/2 3x131/8 111/2 311/2 51/4 7 11/2 93/4 10740

Type A B C D d3 E12 82 35 333/4 25 151/4 213/4 23/8 471/212 83 35 39 25 151/4 213/4 23/8 641/212 84 35 451/2 25 153/4 213/4 23/8 841/212 85 35 49 25 161/2 213/4 23/8 1013/412 86 35 511/4 251/2 161/2 221/4 23/8 1211/212 92 35 353/4 271/4 171/4 233/4 23/4 511/212 93 35 45 271/4 171/4 233/4 23/4 681/212 94 35 501/2 271/4 18 233/4 23/4 9012 95 35 511/4 273/4 18 241/4 23/4 1063/412 96 35 531/4 273/4 18 241/4 23/4 12813 82 35 333/4 363/4 151/4 333/4 23/4 511/213 83 35 39 363/4 151/4 333/4 23/4 681/213 84 35 451/2 363/4 153/4 333/4 23/4 881/213 85 35 49 363/4 161/2 333/4 23/4 1053/413 86 35 511/4 371/2 161/2 341/4 23/4 1251/213 92 35 353/4 401/4 171/4 363/4 31/8 5613 93 35 45 401/4 171/4 363/4 31/8 723/413 94 35 501/2 401/4 18 363/4 31/8 941/413 95 35 511/4 41 18 371/2 31/8 11113 96 35 531/4 41 18 371/2 31/8 1321/414 82 35 333/4 481/2 151/4 451/2 31/8 541/214 83 35 39 481/2 151/4 451/2 31/8 713/414 84 35 451/2 481/2 153/4 451/2 31/8 911/214 85 35 49 481/2 161/2 451/2 31/8 1083/414 86 35 511/4 491/4 161/2 46 31/8 1281/214 92 35 353/4 531/4 171/4 493/4 31/2 571/214 93 35 45 531/4 171/4 493/4 31/2 741/214 94 35 501/2 531/4 18 493/4 31/2 953/414 95 35 511/4 541/4 18 501/2 31/2 1121/214 96 35 531/4 541/4 18 501/2 31/2 1333/4

11.8

BRACKETS FORCONSTANT HANGER TYPE 12-14

Brackets for constant hanger type 12 - 14Type 71 82 .6 - 71 96 .8Standard design.The brackets are normally

shop assembled. On request they can be supplied loose forassembly on site.

The 5th digit of the type des-cription indicates the specification:6 for brackets bolted on,

standard specification.7 for brackets loose,

standard specification.8 for brackets bolted on,

nuclear specification.9 for brackets loose,

nuclear specification.

Dimensions E and G2 apply tothe uppermost position. In otherpositions E and G2 change accordingly.

Order details:Constant hanger type 1. .. ..with bracket type 71 .. ..bolted on.Marking:Operating load: lbsTravel: inch up/downBlocking position (if required):

Lug for transport

Detail Z

11/4

+97

/ 8-2

3 /4

11/4

WeightG2 K1 M1 N T U Z (lbs)43 133/4 363/4 113/4 1/2 91/2 113/4 313601/4 301/2 42 113/4 1/2 91/2 113/4 42880 463/4 481/2 113/4 1/2 101/4 113/4 644971/2 611/2 52 113/4 1/2 11 113/4 844

117 501/2 541/2 12 1/2 11 12 844463/4 15 391/4 13 3/4 101/4 13 399633/4 301/2 481/4 13 3/4 101/4 13 518851/4 493/4 54 13 3/4 11 13 752

102 661/4 541/2 131/8 3/4 121/2 131/8 12651231/4 55 561/2 131/8 3/4 121/2 131/8 126545 133/4 363/4 113/4 1/2 91/2 235/8 476621/4 301/2 42 113/4 1/2 91/2 235/8 64882 463/4 481/2 113/4 1/2 101/4 235/8 970991/2 611/2 52 113/4 1/2 11 235/8 1270

119 501/2 541/2 12 1/2 11 24 127049 15 391/4 13 3/4 101/4 26 60866 301/2 481/4 13 3/4 101/4 26 787871/2 493/4 54 13 3/4 11 26 1135

1041/4 661/4 541/2 131/8 3/4 121/2 261/4 19051251/2 55 561/2 131/8 3/4 121/2 261/4 1905461/2 133/4 363/4 113/4 1/2 91/2 351/2 637633/4 301/2 42 113/4 1/2 91/2 351/2 864831/2 463/4 481/2 113/4 1/2 101/4 351/2 1294

101 611/2 52 113/4 1/2 11 351/2 16951203/4 501/2 541/2 12 1/2 11 36 1700493/4 15 391/4 13 3/4 101/4 39 814663/4 301/2 481/4 13 3/4 101/4 39 1052881/4 493/4 54 13 3/4 11 39 1515

105 661/4 541/2 131/8 3/4 121/2 391/2 25421261/4 55 561/2 131/8 3/4 121/2 391/2 2545

Const. h. BracketsType Type A1 B1 C E F G1

12 82 35 71 82 .6 401/4 223/4 151/4 7 43/4 383/412 83 35 71 83 .6 451/2 223/4 151/4 113/4 43/4 601/212 84 35 71 84 .6 52 231/2 153/4 161/2 43/4 851/412 85 35 71 85 .6 551/2 241/2 161/2 211/4 43/4 1071/412 86 35 71 86 .6 58 241/2 161/2 103/4 43/4 1161/412 92 35 71 92 .6 431/2 243/4 171/4 71/2 51/2 4212 93 35 71 93 .6 521/2 243/4 171/4 121/4 51/2 631/212 94 35 71 94 .6 581/4 251/2 18 17 51/2 893/412 95 35 71 95 .6 583/4 261/2 18 213/4 51/2 1111/412 96 35 71 96 .6 603/4 261/2 18 101/4 51/2 12113 82 35 71 82 .7 401/4 341/2 151/4 7 43/4 383/413 83 35 71 83 .7 451/2 341/2 151/4 113/4 43/4 601/213 84 35 71 84 .7 52 351/2 153/4 161/2 43/4 851/413 85 35 71 85 .7 551/2 361/4 161/2 211/4 43/4 1071/413 86 35 71 86 .7 58 361/4 161/2 103/4 43/4 1161/413 92 35 71 92 .7 431/2 373/4 171/4 71/2 51/2 4213 93 35 71 93 .7 521/2 373/4 171/4 121/4 51/2 631/213 94 35 71 94 .7 581/4 381/2 18 17 51/2 893/413 95 35 71 95 .7 583/4 393/4 18 213/4 51/2 1111/413 96 35 71 96 .7 603/4 393/4 18 101/4 51/2 12114 82 35 71 82 .8 401/4 461/2 151/4 7 43/4 383/414 83 35 71 83 .8 451/2 461/2 151/4 113/4 43/4 601/214 84 35 71 84 .8 52 471/4 153/4 161/2 43/4 851/414 85 35 71 85 .8 551/2 48 161/2 211/4 43/4 1071/414 86 35 71 86 .8 58 481/2 161/2 103/4 43/4 1161/414 92 35 71 92 .8 431/2 503/4 171/4 71/2 51/2 4214 93 35 71 93 .8 521/2 503/4 171/4 121/4 51/2 631/214 94 35 71 94 .8 581/4 511/2 18 17 51/2 893/414 95 35 71 95 .8 583/4 523/4 18 213/4 51/2 1111/414 96 35 71 96 .8 603/4 523/4 18 101/4 51/2 121

1.9

Type Load group L170 19 16 D, 1 15/870 39 16 2, 3 15/870 49 16 4 21/270 59 16 5 21/270 69 16 6 43/870 79 16 7 43/870 89 16 8 57/870 99 16 9 57/8

CONSTANT SUPPORTTYPE 16

Constant supporttype 16 D2 19 to 16 93 15Standard design

Dimension E applies to theuppermost blocking position. It has an adjustment toleranceof +23/8 inch.

Order details:Constant support type 16 .. ..Marking: Operating load: lbsTravel: inch up/downBlocking position (if required):

For considerable horizontal load movement PTFE slide plates are recommended.(See also p. 2.1, type 29)

L1

WeightH K L M N O P S T (lbs)93/4 101/2 31/4 7 - - 73/4 1/4 1/4 33

171/2 161/4 31/4 73/4 - 13/4 11 1/4 1/4 55101/2 103/4 31/4 81/4 2 1 51/4 1/4 1/4 51171/2 201/4 31/4 81/4 2 3/4 103/4 1/4 1/4 86101/2 103/4 4 101/4 21/2 3/4 51/2 1/4 1/4 7318 193/4 4 101/4 21/2 13/4 103/4 1/4 1/4 123103/4 103/4 4 103/4 23/4 1/2 61/2 1/4 3/8 86181/2 201/4 4 103/4 23/4 23/4 101/4 1/4 3/8 141121/2 11 43/4 113/4 31/8 1 101/4 1/4 3/8 130191/2 213/4 43/4 113/4 31/8 41/4 93/4 1/4 3/8 205131/2 11 6 15 43/8 11/4 81/4 3/8 1/2 212201/4 213/4 6 15 43/8 41/4 111/4 3/8 1/2 342161/2 111/4 63/4 173/4 53/8 11/2 91/2 3/8 1/2 362221/4 251/4 63/4 173/4 53/8 61/4 113/4 3/8 1/2 52718 121/2 73/4 201/4 53/8 2 111/4 1/2 5/8 52125 241/2 73/4 201/4 53/8 51/2 113/4 1/2 5/8 73623 113/4 73/4 191/4 51/2 2 13 5/8 5/8 675281/4 293/4 73/4 191/4 51/2 81/2 131/2 5/8 5/8 990243/4 121/2 91/2 221/2 51/2 2 133/4 3/4 3/4 85531 291/4 91/2 221/2 51/2 93/4 14 3/4 3/4 1257

Type A A1 B B1 D d4 E F16 D2 19 113/4 91/2 41/4 23/4 31/2 1/2 28 13/416 D3 19 161/4 101/4 51/4 23/4 41/4 1/2 471/2 13/416 12 15 151/4 103/4 51/4 41/2 41/4 1/2 283/4 21/416 13 15 161/4 103/4 51/4 41/2 41/4 1/2 511/4 21/416 22 15 171/2 131/2 61/4 51/2 51/4 1/2 29 316 23 15 18 131/2 61/4 51/2 51/4 1/2 511/4 316 32 15 171/2 133/4 63/4 51/2 51/4 1/2 291/4 316 33 15 191/4 133/4 63/4 51/2 51/4 1/2 521/4 316 42 15 193/4 151/4 71/4 61/4 6 1/2 313/4 31/416 43 15 221/2 151/4 71/4 61/4 6 1/2 551/4 31/416 52 15 231/4 19 9 73/4 71/2 3/4 323/4 31/216 53 15 28 19 9 73/4 71/2 3/4 561/2 31/216 62 15 281/2 221/2 103/4 93/4 9 7/8 361/4 41/416 63 15 32 221/2 103/4 93/4 9 7/8 611/2 41/416 72 15 303/4 251/4 113/4 103/4 10 1 39 41/216 73 15 331/2 251/4 113/4 103/4 10 1 64 41/216 82 15 32 251/4 121/2 11 10 11/4 431/4 43/416 83 15 371/4 251/4 121/2 11 10 11/4 721/4 43/416 92 15 34 291/4 133/4 113/4 103/4 11/4 46 51/216 93 15 43 291/4 133/4 113/4 103/4 11/4 741/2 51/2

1.10

1ANGULATING CONSTANT SUPPORTSTYPE 16Angulating constant supportstype 16 D2 29 to 16 93 25equipped with ball bushconnections.For use where lateral forcesfrom horizontal travel areto be avoided.

Dimensions E1 and G apply tothe uppermost blocking position.E1 permits an adjustment of + 77/8 inch.

Possible connection

Order details:Angulating constant support type 16 .. ..Marking: Operating load: lbsTravel: inch up/downBlocking position (if required):

The ball bushes to be connectedfit weld-on bracket type 35.

weld-on bracket

LH thread

RH thread

Weld-on Weightd3 E1 G+23/8 J+51/2 K1 R SG SW U bracket (lbs)

0.393 31 73/4 13/4 103/4 5/8 0.36 1.06 1 35 19 13 360.393 501/2 131/2 13/4 163/4 5/8 0.36 1.06 1 35 19 13 570.393 32 73/4 13/4 11 5/8 0.36 1.06 1 35 19 13 570.393 541/2 131/2 13/4 203/4 5/8 0.36 1.06 1 35 19 13 920.472 321/2 73/4 2 111/4 3/4 0.40 1.26 1 35 39 13 850.472 543/4 131/2 2 201/4 3/4 0.40 1.26 1 35 39 13 1350.590 331/4 73/4 2 111/2 13/16 0.48 1.42 11/4 35 49 13 1020.590 561/4 131/2 2 21 13/16 0.48 1.42 11/4 35 49 13 1570.590 353/4 81/4 2 113/4 13/16 0.48 1.42 11/4 35 49 13 1530.590 591/2 141/4 2 221/2 13/16 0.48 1.42 11/4 35 49 13 2280.787 381/2 81/2 31/4 113/4 13/16 0.63 2.36 11/2 35 59 19 2500.787 62 141/2 31/4 221/2 13/16 0.63 2.36 11/2 35 59 19 3800.787 42 81/2 31/4 121/4 13/16 0.63 2.36 11/2 35 59 19 4200.787 671/4 141/2 31/4 26 13/16 0.63 2.36 11/2 35 59 19 5851.181 46 81/2 33/4 131/2 15/8 0.87 2.36 21/4 35 69 19 6001.181 71 141/2 33/4 251/2 15/8 0.87 2.36 21/4 35 69 19 8151.181 501/2 83/4 33/4 123/4 15/8 0.87 2.36 21/4 35 69 19 7551.181 791/2 141/2 33/4 303/4 15/8 0.87 2.36 21/4 35 69 19 10701.968 54 83/4 41/4 131/2 23/8 1.38 2.75 23/4 35 79 19 9601.968 823/4 143/4 41/4 30 23/8 1.38 2.75 23/4 35 79 19 1360

Type A A1 B116 D2 29 113/4 91/2 23/416 D3 29 161/4 101/4 23/416 12 25 151/4 103/4 41/216 13 25 161/4 103/4 41/216 22 25 171/2 131/2 51/216 23 25 18 131/2 51/216 32 25 171/2 133/4 51/216 33 25 191/4 133/4 51/216 42 25 193/4 151/4 61/416 43 25 221/2 151/4 61/416 52 25 231/4 19 73/416 53 25 28 19 73/416 62 25 281/2 221/2 93/416 63 25 32 221/2 93/416 72 25 303/4 251/4 103/416 73 25 331/2 251/4 103/416 82 25 32 251/4 1116 83 25 371/4 251/4 1116 92 25 34 291/4 113/416 93 25 43 291/4 113/4

1.11

CONSTANT HANGER TRAPEZE TYPE 79

Constant hanger trapezetype 79 D2 25 to 79 96 25This type of trapeze appliesin case of limited installationlength where the standardtrapeze type 79 .2 34 doesnot fit.The Trapezes are normallyshop assembled.

X = minimum thread en-gagement, 12 inch thread en-gagement possible.

L and Z to be stated whenordering

E and C apply to uppermostposition. In other positions Eand C increase accordingly.

When selecting constant han-ger trapezes, their total weightmust be added to the opera-tional load.

The permissible load reducesby 5% per 4 inch of extendedlength.

Order details:Trapeze type 79 .. .. with 2 constant hangerstype 11 .. ..L= inchZ= inchMarking: Operating load: lbs at the supporting point.Travel: inch up/downBlocking position (if required):

Tot. weight (lbs) Weight chang.X L=391/4 (lbs/inch)

1/2 66 0.41/2 106 0.41/2 134 1.31/2 179 1.31/2 163 1.31/2 227 1.33/4 229 2.03/4 302 2.03/4 384 2.03/4 562 2.0

1 337 2.51 439 2.51 558 2.51 816 2.511/4 507 2.811/4 701 2.811/4 899 2.811/4 1164 3.311/2 847 3.711/2 1071 3.711/2 1433 3.711/2 1759 3.711/2 2470 3.713/4 1210 4.713/4 1517 4.713/4 2075 5.213/4 2858 5.213/4 3530 5.22 1645 6.72 2114 6.72 2784 6.72 3781 6.72 4830 6.721/4 2002 6.721/4 2661 6.721/4 3583 6.721/4 4403 6.721/4 5580 6.7

Type

79 D2 2579 D3 2579 12 2579 13 2579 22 2579 23 2579 32 2579 33 2579 34 2579 35 2579 42 2579 43 2579 44 2579 45 2579 52 2579 53 2579 54 2579 55 2579 62 2579 63 2579 64 2579 65 2579 66 2579 72 2579 73 2579 74 2579 75 2579 76 2579 82 2579 83 2579 84 2579 85 2579 86 2579 92 2579 93 2579 94 2579 95 2579 96 25

A max.

473/4481/27676771/4771/4851/2851/2851/2851/2868686861/4913/4913/4913/4913/4931/2931/2931/2931/2933/4941/2941/2941/2943/4943/4951/4951/4951/4951/4951/2961/2961/2961/2963/4963/4

B

123/4171/4201/4211/2223/4231/4233/4251/227293/4251/428291/2313/4291/4333/4351/4391/2351/4383/440411/2513/4381/441471/4531/2584045511/255571/24251563/4571/4591/4

C

141/422151/426153/4261/4161/4271/439501/4181/4304355193/4311/2443/4561/2231/4363/452651/2811/4253/4395669861/2293/4463/4663/484

1033/4321/4491/4703/4871/2

1083/4

D

41/451/451/451/461/461/463/463/463/463/471/471/471/471/29999

103/4103/4103/4103/411113/4113/4113/41212121/2121/2121/2121/2123/4133/4133/4133/41414

E

793/491/4

1591/2

1491/4

141/2233071/2

161/4263/4311/2103/4161/226331/4121/21932423/4493/4121/222321/4401/4501/415251/240501/4603/417261/4411/255661/4

G5/85/8

11/411/411/411/413/413/413/413/421/421/421/421/421/221/221/221/223/423/423/423/423/433/833/833/833/833/833/433/433/433/433/444444

L max.

431/4431/4703/4703/4703/4703/4783/4783/4783/4783/4783/4783/4783/4783/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4823/4

FUNCTION TESTS 1

1.12

Specimen of atest certificatefrom a normaldelivery test

Functional performanceThe specific functional principle of LISEGA con-stant hangers guarantees absolute constancyacross the entire travel range. This is not evenaffected by load adjustment. Only a minorfriction force resulting from tolerances andbearings has to be taken into account as aslight deviation. The hysteresis produced bythis is kept within very narrow limits by thedesign principle and by state-of-the-art manu-facturing procedures.

For normal load settings, deviations in theoperating load for LISEGA constant hangersin series production is kept in practice at 3% on average. Using a selection process,supply of hangers with a maximum deviationof 2% is possible.

The generally permissible deviations are laiddown in the following international standards:

MSS-SP 58, USA, max. 6% referring to operating load.

VGB R 510 L and KTA 3205.3, Germany, max. 5% referring to operating load.

EN Europa Normenentwurf, max 5%, referring to operating load. The mean load deviation is limited to max 2%.

Function testsBefore delivery, each constant hanger is testedfor correct function and set to the requiredload.

The test results are both graphically and digi-tally plotted and recorded. They can be sup-plied on request.

The load setting values are stamped on ariveted aluminum name plate. In addition,the set load is permanently marked on theload scale. Cold and hot positions are markedon the travel scale in white and red respec-tively.

The relevant travel position is directly read-able on the travel scale in mm and inches.The relevant set load can be read from theload scale in kN or lbs.

For function testing, quasistatically actingtest benches with a capacity of up to225000 lbs [1000kN] are available in all the factories. The test benches are inspected at regularintervals by an independent authority.

Acceptance test of a constant hanger

FA

F1

B

EC

D

F2

F

A

F1

B

D

C

E

F

A

B

C

DE

F

Operating function of LISEGA constant hanger

2

Upper position

Midposition

Lower position

OPERATIONAL FUNCTION

1.13

Special requirementsStrict demands are placed on constant han-gers to ensure reliable function:

absolute constancy for all load settings

minimum mechanical friction

Likewise, particular requirements are to befulfilled for the continuous monitoring of thepiping system performance:

reliable indicators for set load and travel

adequate and precise subsequent load adjustment if required

The LISEGA functional principleLISEGAs patented functional principle forconstant hangers provides the ideal condi-tions for fulfilling all requirements. The prin-ciple is based on the interplay of force fromone main spring and the resultant forcefrom two hooked up compensating springs.The directions of force of the two pre-stressed compensating springs are opposedto each other in the form of a parallelogramof forces.

The suspended load acts directly on themain spring via a central load tube . The force of the compensating springs operates as resultant force , via camsand rollers . This force acts additionallyon the load tube. The main spring forceand resultant force change when the loadis moved over the travel range . This is inaccordance with the characteristics of thespring, and the angle and shape of the cams.The individual components are arranged insuch a way that any changes in the resultantspring constancy correspond exactly withthe characteristic curve of the main spring.In this way the force of the main spring isevenly compensated for, providing constantsupporting force.

FF2

ABF

1

s

DE

F2C

Large loadadjustment range

Small number of unitsizes (load groups,modular system)

Serial production(favorable

manufacturing costs)

Warehousing(short term availability)

LISEGA functional principle for

constant hangers

1.14

1Down towards the apex of the cams theresultant force diminishes in proportion tothe increase in the relatively low startingforce of the main spring.

At the apex of the cams the forces of thecompensating springs are cancelled out. The resultant is zero. At this point only themain spring carries the load. Beyond the apex,the direction of the proportionally increasingresultant force of the compensating springs isreversed. It now reduces the relatively strongmain spring force in the same way.

The sum of, or the difference between theforces F1 and F2 at each point in the travelrange = F.

Only the LISEGA functional principle guarantees absolute constancy right from a theoretical basis.

Only the LISEGA functional principle allows a particularly wide load adjustmentrange of 40 - 100% of the nominal load.

Load adjustmentLoad adjustment is carried out by adjustingthe pre-tension of the main spring. Becausethe characteristic curves of the resultantcompensating force and those of the main-spring are identical, only a linear displace-ment of the starting load occurs. The forcevariation achieved by altering the main springpre-tension is the same at every point in themovement cycle. Therefore, the ultimate loadremains constant at each load setting. The

usable travel changes in proportion to theload alterations.

The extremely wide load adjustment rangeenables us to cover a broad range of appli-cations with a compact number of unit sizes.This special advantage is the prerequisite forthe formation of load groups as the basis ofthe LISEGA modular system. In this way,rational series production and warehousingcontrol are made possible.

Effect of load adjustment in LISEGA constant hangers

Examples of practical functionF1

Travel

1.15

Connection typesThe connection threads correspond to thestandardized diameter of the relevant LISEGAload group. At the upper connection thethread depth is limited. At the lower end, thenut is used as a turnbuckle for adjusting rodlength.

The shape of the hanger housing allows directseating on existing connection structureswithout extra accessories. In addition, specialbrackets can be attached using the standardtapped holes provided. Constant hangersabove load group 9 (heavy duty) have yokeplates for bolted connections instead ofconnection threads.

Performance rangeConstant hangers and supports are manufac-tured in load groups C - 9 as serialized single-cell units. They can also be coupled togetherfor load groups 8 or 9 as multi-cell hangerswith heavier loads. In this way a standardized range of 20 lbsto 112400 lbs [0.1kN to 500kN] can becovered. Constant hangers are manufacturedin 6 standard travel ranges: 6/ 12/ 18/ 24/30/ 36 inch [150/ 300/ 450/ 600/ 750/900mm] - constant supports up to 12 inch[300mm].

Standards and calculationsComponent design and layout fully complyas regards load capacity, dynamic functionand lifespan with the relevant national andinternational standards and codes. This ap-plies equally to the materials used, weldingtechnology and other processes. Relevantdetails can be found in the TechnicalSpecifications (page 0.9).

SpringsThe springs are decisive for the flawless functioning of constant hangers the longterm operational safety of these componentsdepends on them. DIN standards form thebasis of the LISEGA coil spring specifications.Details can be found in the TechnicalSpecifications in section 0.

Mounted constant hanger

DESIGN FEATURES

Design shapeLISEGA constant hangers are made to a com-pact and symmetrical design. This facilitatesspace saving installation dimensions and theuse of standard accessories. When installingon site, much time and effort is saved bylow unit weight and simple positioning atconnection points. Only one hanging point isneeded for fitting. The load transfer passesthrough the axis of symmetry. Space for ra-dial deflection (lever arm hanger) need not beconsidered. Additional moments posed on thesupporting structure by lever arm units aretherefore avoided. The design enables a directreading of the travel position on a scale of 1:1.

Design constructionA steel housing encases the internal workingparts such as springs and cams. The compactarrangement of these individual parts insidethe housing leads to small external dimen-sions. The housing is designed to be loadbearing and to accommodate LISEGA standardconnecting components.

Type 79trapeze

Type 71bracket

Steel construction

on site

Type 66 rod

Type 61 clevis

Type 60 eyenut

Type 67 stud bolt

Serial connection types

1.16

1Spring relaxationConventional helical coil springs subjected toload and temperature over a period of timelose part of their force (spring relaxation). In the long term, it can cause a reduction inthe adjusted support loads of more than 10%in constant and variable spring supports(see calculation example).

LISEGA only uses prerelaxed springs whichby an artificial aging process allow no signi-ficant settling loss. In a hot setting procedurewith extended coil lengths a correspondingpreplastification is attained. The settling lossnormally to be expected is thereby prevented.

Corrosion protectionConstant hangers are finished with a LISEGAstandard coating system which in conjunc-tion with a metallically pure treated surfaceoffers superior corrosion protection with highmechanical stability. Bearings and pins aremade from stainless steel. All threaded parts and cams are electro-galvanized and yellow chromatized.

The spring coil surfaces are given specialfinishing treatment (see Technical Specifica-tions, page 0.10).

The standard corrosion protection for constanthangers needs no maintenance inside buil-dings, or in areas protected from the weather.For components in the open and in specialcases of operation, a more comprehensivecorrosion protection can be agreed on.

Modern welding robots and CNC machines ensureconstant product quality

Handling area in paint booth

(See the section on corrosion protection in the TechnicalSpecifications, page 0.10.)

EExxaammppllee ooff ccuummuullaattiivvee aaddddiittiioonnaall llooaaddss dduueettoo hhaannggeerr rreellaaxxaattiioonnThe effect of a 10% loss in hanger powerwas observed in a pipeline (Dia = 20.7inch[525mm], s = 1.06inch [27mm], temperat-ure = 1004F [540C], pressure = 725psi[50bar] ).Due to this loss, the piping displaced at amaximum of 1.43inch [36.4mm].

The maximum primary stresses were calcul-ated in the safety valves near the boilerconnection. They were 93% higher than theplanned condition. The permissible stressesfor the connection were exceeded by 9%.(Calculations in accordance with regulationsB31.1).

connectionpoint / hanger

hanger setload hanger load

additional displacement

additional z-loadat connection

point

condition after 10% relaxation

boiler outlet boiler

Y

in(1000 lbs) in(1000 lbs) in(1000 lbs) in inch

y-load

plannedcondition

1.17

INSTALLATION EXAMPLES

Universal fitConstant hangers can beadapted to practically anysituation in the plant by theuse of universal-fit acces-sories as part of the LISEGAmodular system.

Automatic through LICADConfigurations 1 - 13 can be produced automaticallyin 2D and transferred to 3Dsystems via the LICAD designsystem.

Examples 14 - 17 showeasily-designed special applications.

Typ 38

1 2 3

4 5 6

7 8 9

Type 73Type 60Type 63Type 67Type 63

Type 11

Type 63

Type 66

Type 63

Type 61

Type 44

Type 75Type 61Type 67

Type 11

Type 63

Type 67

Type 49

Type 63Type 61Type 79

Type 75Type 61Type 63Type 67

Type 63

Type 49

Type 79

Type 75Type 61Type 67

Type 11

Type 63

Type 67

Type 63Type 61Type 79Type 60Type 63Type 67Type 63Type 61

Type 44

Type 11

Type 63

Type 67

Type 63

Type 60

Type 43

Type 73Type 60Type 67

Type 11

Type 63Type 67

Type 63Type 61Type 71Type 61Type 63

Type 67

Type 49

Type 63Type 61Type 79

Type 11

Type 71

Type 63

Type 66

Type 63

Type 60

Type 43

Type 49

Type 16

Type 38

Type 35

Type 16

Type 35

1.18

1

17

10

14

12 1311

16

15

Typ 48

Type 73Type 60Type 67Type 61Type 79Type 61Type 63

Type 67

Type 63Type 61Type 79Type 61Type 63Type 67

Type 63

Type 11

Type 67Type 60

Type 43

Type 73Type 60Type 67

Type 11

Type 63Type 67Type 63Type 61Type 79Type 61Type 63

Type 67

Type 63Type 61Type 48

Type 73Type 60Type 63Type 66Type 63

Type 11

Type 63

Type 67

Type 63

Type 61

Type 46

Type 75Type 61Type 67

Type 11

Type 63

Type 66

Type 63

Type 61Type 48

Type 11

Type 63

Type 66

Type 63

Type 60

Type 43

Type 49

Type 16

Type 11

Type 49

Type 63

Type 67

Type 74Type 63

Type 71

Type 71

Type 11

Type 63

Type 67

Type 63

Type 61

Type 44

1.19

unpredictable random influences on pipe statics

differences between theoretical and actual values of load distribution

A combination of deviations can normally beexpected, which cumulatively can amount toconsiderably high values. This is especiallyunfavorable with long-legged (soft) pipingsystems. Vertical movements can be obstruc-ted here, even on relatively minor individualdeviations, and partially or even totally sup-pressed. Apart from the extra load caused,unacceptable sagging can occur with a rev-ersed slope, supported by spring hysteresisfrom the pressure-loaded system. In additionto possible time yield damage, this wouldfavor dangerous water hammer effects dueto a false incline.

In such cases, a sensible solution would beto complement the passively reacting con-stant hangers with the actively workingLISEGA servo hanger.Via the hydraulic servo assistance, the pipingis now actively supported in its movementat every predetermined height.

THE LISEGA SERVO HANGER

ApplicationIn the ideal situation the weight of the pipingis almost balanced out with the set load ofthe constant hangers. The sum of deviationspresent and the additional stresses in thepiping system thereby caused then remainwithin the permissible harmless range.In certain cases, total deviation can exceedpermissible levels. In the form of secondarystresses it can considerably reduce the lifespan of the piping or its connections in thearea of creep strength depending on time.

Deviations can occur due to:

wall thickness tolerances of the pipes, if these are not weighed individually and weight differences are not taken into consideration

insulation weights not exactly determinable in advance

mechanical friction and manufacturing tolerances within constant hangers (permissible 5%)

relaxed springs in constant hangers

Original cold setting

Hot setting

New cold setting

Without servo hanger (figure left)With servo hanger (figure right)

Despite the use of variablespring and constant han-gers, piping systems andother components are, undercertain conditions, obstruc-ted in their thermal move-ment by friction or otherinfluences. In such casesservo hangers can be use-fully employed.

Typical example of use of LISEGA servo hanger

boiler center

turbine

turbine

boiler center

1.20

1Unit sizesUnits are available from series constructionfor load groups 5 (FN 4495lbs [20kN] ) to 9(FN 22480lbs [100kN] ) with travel range 2(6inch [150mm] ) and 3 (12inch [300mm] ).In special cases non-standard designs can be manufactured.

Operating instructionsInstallation and commissioning instructionsand maintenance recommendations are sup-plied on delivery.

Design and functionThe basis for the servo hanger is a standardType 11 constant hanger. To overcome loaddifferences, it is additionally fitted with ahydraulic auxiliary device providing additionalactive force in both directions (servo assis-tance).

As a control parameter, the temperature ofthe piping to be supported is normally used.The relevant temperature is converted elec-tronically into the corresponding position. Inthe actual / theoretical value comparison pro-cedure, the control provides for a regulatedadvance towards the vertical theoreticalposition.

Electro-hydraulic controlThe hydraulic unit and the electronic controlare housed separately from each other in aswitchgear cabinet mounted near the servohanger (max distance 52 feet [16m] ).The hydraulic piston controlling the move-ment is located in the load tube of the con-stant hanger.

Automatic safety switchThe electrohydraulic control is designed insuch a way that only the servo assistance islost if there is an operational breakdown, e.g. a power failure. The unit itself wouldcarry on operating in the normal way as aconstant hanger.For deviations in theoretical (temp.) / actual(travel) a tolerance range can be adjusted.The control shuts off automatically if thedeviation lies outside these values.

Manual shut offFor possible maintenance work in the systemor at the boiler, the servo assistance can beshut on or off by hand.

See page 1.3 and 1.4 also

2 = Travel range 23 = Travel range 3

Function scheme

hydr.device

electr.control

theoretical

actual

Servo- Nominal Calibration Load dependent travel Additionalhanger load FN load Travel range 2 Travel range 3 Servo forceType lbs lbs inch inch lbs17 5. 25 4495 1800 - 4495 3 - 6 6 - 12 180017 6. 25 8990 3595 - 8990 3 - 6 6 - 12 450017 7. 25 13490 5395 - 13490 3 - 6 6 - 12 450017 8. 25 17985 7190 - 17985 3 - 6 6 - 12 450017 9. 25 22480 8990 - 22480 3 - 6 6 - 12 4500

1.21

On the name plate are stamped:

type serial number order number (if required) set load theoretical travel marking (position number) test stamp (if required)

On the travel scale, the theoretical hot posi-tion is marked with a red sticker, the theo-retical cold position with a white one. The load adjustment ordered is permanentlystamped on the load scale with an X duringfinal inspection.

INSTALLATION ANDOPERATING INSTRUCTIONS

Constant hangers are mech-anically acting devices.Their trouble free operationis vitally important for thesafety of piping systemsand connected components.Careful attention must bepaid to the following in-structions to ensure troublefree operation.

1. Transport and storageTransport must be carried out carefully inorder to avoid damage. It is particularly im-portant that load adjustment screws andconnection threads remain intact. If storedin the open, care must be taken to protectcomponents from dirt and moisture.

2. Delivery conditionLISEGA constant hangers are supplied set tothe load specified in the order, and blockedin the required installation position. All han-gers are supplied with a riveted aluminumname plate, as well as travel and load scale.

travel stop guide bolt name plate red marking

for hot position fixing bolt with

washer for travel stop after deblocking

travel scale serrated travel

stop strip adjustment load

indicator

load scale adjustment bolt load tube

control bore for min.

screw-in depth load nut upper yoke plate lower yoke plate connecting rod tensioning bolt

Name plate with stamped operating data

Travel scale with cold/hot markings

Load scale with indicator

2.1 Constant hangertypes 11 C3 .. - 11 96 .. (single cell)The upper connection is supplied as internalthread with limited screw engagement. The lower connection is a spherical load nutwhich can angulate through a minimum of 4in all directions. The connection threads arefilled with grease and sealed with plastic caps.

2.2 Constant hangertypes 12 82 - 14 96 (multi cells)The upper connection is provided as standardin the form of a lug for a connecting pin.The lower attachment exists of several ten-sioning bolts connected by a yoke plate.

2.3 Constant hangers (seated)Constant hangers of all sizes can be directlyseated. They can also be supplied with serial-ized brackets type 71. The brackets can bebolted on at works or on site according toorder using the precision fit holes provided.The base plates of the mountings can be eitherwelded or bolted to the mounting surface.

2.4 Constant supports type 16Constant supports follow the same designprinciple as the constant hanger. Instead ofthe lower connection, they have an uppersupport tube with a screwed-in adjustingspindle and load plate.

3. InstallationWhen installing, the rules for the InstallationInstructions for Piping are to be adhered to.Special attention must be paid to the desiredinstalled position of the hanger rods in thewhole support chain. Two possibilities areusual practice:

1. The hanger rods are to be installed at anangle in accordance with expected horizontaldisplacement of the piping. It is expected thatthe rods become vertical during operatingconditions.

2. The hanger rods are to be installed ver-tically for better control. A controlled angledposition during operating conditions is thenpermitted.

In all cases there should be a unified set ofrules for the whole plant.

Attachment rods and points must be connec-ted under actuation of load.

3.1 Constant hangertype 11 C3 - 11 96 (single cell)Transport lugs or other installation aids canbe screwed into the threaded holes providedon the sides. After deblocking the hangers(see Point 4), the blocking plates should bebolted on here for storage. For constanthangers with type 71 brackets, the hangersare supplied with transport lugs instead ofthe upper connection. The lugs can also ac-commodate the blocking plates. When rem-oving the blocking plates from constanthanger types 11 82 to 11 96, care must betaken that only the larger circlip is removed.For connection to the connecting rod, caremust be taken that the lower rod is screwedinto the load nut at least up to the controlbore. A further screw engagement of 12 inch[300mm] is provided.

1.22

1

load plate adjusting spindle support tube serrated travel

stop strip blocking plate name plate guide pin travel scale

securing screw &

washer for blockingplate after deblocking

indicator for adjustment load

load scale

adjustment bolt

Blocking plate bolted laterally

Blocking pin with circlips

Constant support type 16

3.2 Constant hanger types 12 82 - 14 96To install the hangers, the side openings ofthe upper yoke plate can be used for lifting.On hangers fitted with brackets, the upperyoke plate is substituted by a transport lug.

Constant hangers types 14 82 - 14 96(4 - cell design) are supplied with a transportsafety device marked in red along the centeraxis. This serves to provide additional mid-blocking to the blocking pin on an unloadedhanger.

The transport safety device must not be loosened until after the complete installationof the hanger simultaneously with the remo-val of the blocking plates.

For this purpose the red locknut is removedat the lower end using a box spanner. Bothparts are to be stored in the same place asthe blocking plates. When making the load-actuating connection, care must be taken thatthe lower load anchors are screwed into thelower load nuts at least up to the controlbore. The installation dimension of the loweryoke plate can be extended with the loadnuts by up to 97/8 inch [250mm] or shortenedby up to 23/4 inch [70mm].

1.23

4. Removing the blocking devices

4.1 RequirementsThe correct deblocking of the constant han-gers as per the following instructions is deci-sive for the subsequent flawless functioningof the piping system.

The blocking devices should only be removedimmediately before commissioning. The blocking devices must be removedsystematically, i.e. from fixed point toconnection or from connection to connection.

Prior to this the whole system should bechecked as per Item 3 in these installationinstructions.

4.2 Theoretical and actual conditionIf it has been ensured that all connectionsare actuated by load, the load suspended iscompletely taken over by the constant han-gers or supports. If the actual load corresponds to the instal-led load and the piping system shows nosigns of constraints, the planned equilibriumhas been achieved. The travel stop platescan now be removed.

In practice, however, slight constraints andhence certain load displacements in thepiping system can hardly be avoided. Thetheoretically determined loads can also showconsiderable tolerances. Deviations resultingfrom this can lead, according to increased ordiminished loading, to a corresponding jam-ming of the blocking pin in the upper orlower part of the blocking plates.

Transport lug and correctconnection

Safe storage of travel stop plateson constant hangers with brackets

1 rod2 washer3 nut

4.3 Load distributionThe travel stop plates must never be removedby force!By loosening or tightening the connectingrods with a few turns of the load nut for con-stant hangers, or adjustment of the supporttube for constant supports, the locked-upstress in the piping can be compensated sothat the blocking pin is free.However, the geometrical layout of the pipingmust not be altered when balancing thesestresses.Because the adjustment of one position canlead to stressing at another location, thisprocedure must be repeated if necessary atdifferent points.For thorough control, we recommend as amatter of principle removing the travel stopplates only after all the blocking pins are free.

1.24

1

LLooaadd ppiinn ffoorrcceedd uuppwwaarrddss::Applied load is lower than set load.Tighten connecting rod or reduce set load

LLooaadd ppiinn iiss ffrreeee::Applied load conforms with set load.Blocking plate can be removed

LLooaadd ppiinn ffoorrcceedd ddoowwnnwwaarrddss::Applied load is higher than set load.Loosen connecting rod or increase set load

4.4 Load correctionIf the blocking pins jam, and cannot be freedwithout displacement of the piping, significantdeviations in the piping load can be assumed.

The adjustment bolts of the constant hangers and supports can then be corres-pondingly set. Once more, this should be donefrom position to position, as described inpoint 4.3. If this is done correctly, load differ-ences can be practically balanced out by thismethod. Any load adjustments must as a mat-ter of principle be agreed on with the tech-nical department responsible for the pipingsystem. Any new load setting values shouldbe indicated on the load scales and recorded.

4.5 Installation devicesWith all hangers, tightening or loosening theconnecting rods, as well as load adjustment,can be done by hand. With hangers and sup-ports for higher load groups, however, thisoperation may need considerable force. To make this easier, an installation aid canbe provided which takes on the load hydrau-lically with the aid of a hand pump.

4.6 CommissioningBefore commissioning it must be checkedthat each hanger allows the expected pipingmovement.The hanger travel can be read directly fromthe position of the blocking pin in the guideslots on the travel scale.If required, for example when carrying outrevisions, hangers and supports can beblocked again in any travel position. This isdone by mounting and securing the blockingplates onto the blocking bolt.

5. Control and maintenanceThe correct performance of the constant han-gers and supports can be checked in all ope-rating situations by noting the position ofthe blocking bolt.Under normal operating conditions no main-tenance is required.

Installation device for relievingadjustment bolts

Installation device for relievingblocking device

Standard Supports 2010IntroProductsProduct Group 0Product Group 1ContentsConstant hangers and constant supportsSelection tableConstant hangers type 11Brackets for constant hanger type 11Constant hangers type 12 - 14Brackets for constant hangers type 12 - 14Constant supports type 16Angulating constant supports type 16Constant hanger trapeze type 79Function testsOperational functionDesign featuresTypes of installationLISEGA servo hangerInstallation and operating instructions

Product Group 2Product Group 3Product Group 4Product Group 5Product Group 6Product Group 7Product Group 8Product Group 9

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