r-gl-13jindal btg heat insulation and painting construction manual

BTG Heat Insulation and Painting Construction Manual

BTG for Chhattisgarh 4X135 MW CPP,

Raigarh

DOCUMENT CONTROL SHEET

PROJECT: BTG for Chhattisgarh 4 X 135 MW CPP, Raigarh

CLIENT: JINDAL STEEL AND POWER LIMITED/ SHANGHAI ELECTRIC GROUP CO., LTD.,

DOCUMENT TITLE: BTG Heat Insulation and Painting Construction Manual

DOCUMENT NO. : R-GL-13

REV. NO. : A

ENDORSEMENTS

2009-8-25

REV. NO.

DATE DESCRIPTIONPREP. BYSIGN.(INITIAL)

REVW. BY SIGN.(INITIAL)

APPD BY SIGN.(INITIAL)

DOCUMENT NO.:R-GL-13 Originator: Page:1



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Contents

1. Basis of Compiling 4

2. Compiling purpose and applied scope 4

3. General introduction of equipments and workload 4

4. Allocation of resources 4

5. Construction procedure and method 6

6. Quality standard and requirement 13

7. Main safety and technical measures 14

8. ANNEX 16




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1. Basis of Compiling

1.1. Shanghai Boiler Factory Boiler Setting Insulation Instruction Book

（573-1-8607A）

1.2. Shanghai Boiler Factory The Insulation Drawing for Boiler

Proper（501573-E1-09）

1.3. Central Southern China Electric Power Design Institute The Instruction

Book for Insulation Painting （40-F5061S-J0701）

2. Compiling Purpose and Applied Scope

2.1. In order to instruct workers to follow standards and requirements, construct

according to drawing, ensure the quality of construction，reduce heat loss of

power plant, and improve the heat economy of power plant, it is necessary

to compile the instruction book. The instruction book regulates working

technique and quality requirements for heat insulation and painting. It also

explains necessary allocation of resources for completing the project,

necessary machines and tools and warning for security. It is applied for

installation work for India Jindal 4×135MW power plant project.

3. General introduction to equipment and workload

3.1. Boiler Proper Insulation: The boiler setting of 460t/h circulating fluidized

bed combustion boiler is light tube type. The weight of boiler setting is

arranged even and fixed regular on boiler heat surface. It is expanded with

tube. The difference of characteristic and structure for different part of boiler

determines the difference of boiler setting structures which are laid on

separate parts. Therefore, the boiler setting is divided into below parts:

roof、sealing box、water wall、back-pass、primary air box、gas duct、air heater

、air duct and piping、drum、wall pipe

3.2. CSCEPD is in charge of designing a part of whole factory’s insulation and

painting: The work includes: gas, air and coal system between two units, fuel

system, steam piping, public instruments, and auxiliary equipment for boiler,

platform checking and ladder.




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3.3. Insulation and sound isolation layer installation for ID fan, FD fan and PA

fan, insulation and painting for turbine proper and electric precipitator are not

included in the scope of the instruction book. It is necessary to refer to

manufacture’s drawing and instruction at the construction time.

4. Allocation of resources

4.1. Allocation of manpower

4．1．1 Engineer and technician: In charge of handing out security and technical

documents to workers; instruct workers to construct, check the implementation of

instruction book, supervise site construction quality, and provide technology

consultation; inspect the quality of the construction, and make instant

improvement if defects are found.

4．1．2 Construction Supervisor: Instruct workers to be familiar with construction

procedure and technical requirements. Connect and check if equipment

installation is completed and report to project engineer and technician. Make

construction records. In charge of the transportation and staging of construction

materials; supervise the construction quality and plan construction procedure.

Attention to security, supervise the cleaning of site and civilized construction.

4． 1． 3 Construction in charge: Have related business ability. Familiar with

construction technique and quality requirements, obey the arrangement made by

engineers, technicians and construction supervisor. Ensure workers to have full

understanding about project characteristic and strictly working as the

requirements of instruction book and drawing. Ensure the constructors to

complete all the work cooperating with other workers. Ensure the civilized

construction and take care of cleaning the site.

4.2. Allocation of Tools

SL.

No.Name Dimension Quantity

1 Tapeline 5M/10M 20/20 pcs

2 Board tape 1M，300㎜ 10 pcs each

3 Flat screwdriver 200㎜ 20 pcs




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4 Cross screwdriver 200㎜ 20 pcs

5 Electric hand drill J1Z-4A 10 sets

6 Electric rivet machine PIM-5 10 sets

7 Cutter 1 pc

8 Border cutter 1 pc

9 Electric welding machine 6 pc

10 Angle folding machine 1 pc

11 Roll line machine 1 pc

12 Compulsive mixer 1 pc

13 Vibration pole Mini type 1 pc

14 Shovel flat 10 pc

15 Float 10 pc

16 Ash bin 20 pc

17 Double phase line 500 m

18 Tri-phase line 200 m

19 Compressor 0.2-0.8MP 1 pc

20 Axial flow bower Mini type 2 pc

21Portable electric grinding

wheel3 pc

22 Electric wire brush 3 pc

23 Manual wire brush 30 pc

24 Airbrush 5 pc

25 Paint brush 40 pc

26 Paint roller100、150、200m

m10 pc each

27 Angle polisher 20 pc

5. Construction procedure and method

5.1. The preparations and essential conditions for construction

5.1.1 The pectinate board, drag seal and supporting components to be welded to

pressure pipe should be finished before boiler hydraulic test.




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5.1.2 The equipments and pipes which need heat preservation should be got rid

of rust, dust and oil and kept dry.

5.1.3 The heat preservation of the equipments and pipes can be preceded after

the qualification of leakage test (including hydraulic test, pressure decay test, and

oil leakage test etc.)

5.1.4 Organize workers to take care of the transferring and piling of the material

and take waterproof measures. The heat preservation materials should be sorted

according to their property and specification in to the draughty and moisture proof

warehouse to keep dry.

5.1.5 The installation of the buckstay is finished and accepted. All the pipe-

hangers and boiler top hangers are installed and accepted.

5.1.6 Thermal sampling points on the equipments and pipes are installed.




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5.2. Heat insulation and paint construction flow chart


Chart 1: Heat Insulation Flow Chart

Sort equipment and spot check

Qualified

Install heat insulation hook and bracket

Lay heat insulation materials

Install surface and casing

Qualified

Quality inspection

Replace equipment

Finsih

No

Yes

No

Yes

Unqualified laying

Prepare



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Repalce equipement

No

Prepare

Check equipment

Clean surface (oil, dust, rust ect.)

Qualified

Qualified

Brush anti-rust paint

Quality insepction

Paint surface and take antisepsis measures

Finish

No

Yes

No

Yes

Yes

Chart 2: Painting construction flow chart



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5.3. Heat-insulation for boiler proper

Arrangement of heat-insulation rivet and welding: The heat-insulation rivet is

welded on the extended-surface of water wall tube. It is required to check the

material of heat-insulation rivet strictly before welding. The welder who is in

charge of welding heat-insulation rivet should be experienced one. Draw a line on

the water wall to make sure the rivets can be welded on a same line. According to

the requirements of marked dimension of Boiler Setting Fastening Device, mark

the initial position for heat-insulation rivet welding above buckstays of each layer.

Use chalk to draw a straight line and then mark the welding position for rivet

according to the layer space between water walls. The heat-insulation rivets are

staggered arranged; the arrangement space follows the requirement of drawing.

In order to make the rivet can be welded on extended-surface at the time of

welding, the arrangement space between rivets is kind of deviation. However, it is

required to have 11 heat-insulation rivets at every square in principle. Control

current when weld the rivets. Excess of current is easy to break rivets themselves

and damage the material, on the contrary, undersize of current result the unstable

of welding. Turn the heat-insulation pointer to 45° and then turn it to vertical

position, it is checked as qualified one if the rivet is not falling down.

Construction on heat-insulation layer: fire hole, refractory concrete casting for

sealed box need to be completed before the heat-insulation of boiler setting. The

laying of heat-insulation material should from the bottom to the upper; the plate is

lateral laying and seams between plate should be rigorous. If the heat-insulation

plate which takes through the rivet is broken or raised, press it to flat. The upper

and bottom layer heat-insulation plate require middle staggered. The staggered

space is not less than 50cm when the space cannot avoid adjusting. The inner

and outer plate are also required middle staggered when layer construction. The

staggered space is not less than 20cm when it needs to be adjusting. Each layer

of heat-insulation surface requires to be smooth. Inner heat-insulation plate falls

without self-lock pressure plate, it needs to install self-lock pressure plate or

tighten up with steel to avoid falling down that can influence heat-insulation effect.

Outer layer heat-insulation only can start after the inner layer heat-insulation is




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qualified when work at separate layer. The corner needs to lay as a whole plate

and not allowed to joint at the corner. Pay special attention to the heat insulation

of parts around stiffening bar and fire door hole sealed case during constructing to

ensure the fine seam. The heat insulation materials should be consolidated and

tight. Pad with loose wool to ensure the tight of the heat insulation if necessary.

Wire netting: Use self-lock pressure plate and heat-insulation rivet to tie the

wire netting on the heat-insulation layer. Each fixed point should be concave and

lower than the surface of heat-insulation layer. Wire netting needs to be tighten

and no drum should be on the heat-insulation surface. The lap-joints of the wire

net should be tightly fixed with galvanized iron wire. The length of the lap-joint

should not be less then 50mm. There should be no wire joint in the corner of the

boiler. After the tight pulling outer layer wire net, press the hook nail head with

self-lock pressure plate till the heat exposed and fastened. The hook nail head

and expanded metal gasket should not exceed the outer surface of heat insulation

layer. Wrap the tie-in to φ6mm round steel after the wire net break around the

door hole and stiffening bar. Then weld the round steel to the non-pressure parts

(such as door hole sealed box, stiffening bar).

Installation of outer casing: Outer casing of boiler setting is pressure

aluminum plate with self-tapping screw self-plugging rivet fixed on supporting

parts. The L supporting bending-plate which is provided by Boiler Factory is

needed to put on the buckstay before boiler setting heat-insulation. In order to

make sure L supporting bending-plate can be welded on a line, it is necessary to

mark a horizontal line. L supporting piece is divided into two parts to weld. The

length of every weld seam is not less than 15mm. After the welding is completed,

it is required to weld “Z” supporting piece on “L” piece which is above buckstay.

Weld “II” supporting piece on “L” supporting piece which is below buckstay. The

outer casing is fixed on the “L” supporting piece. “II” supporting piece and “L”

piece should be welded fastened. The two welded supporting pieces should be on

a same plane. The planeness deviation should not be more than 1mm. The same

rule applies to “L”pipece on the same level. After completing the supporting parts,

put the outer casing head into the socket forming by the “∏” and “L” supporting

piece with self-tapping screw fixed at the bottom. The head of the outer casing is




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not allowed to fully fill the socket of “∏” supporting piece, but to leave a space

about 25mm to the socket top. The fixed self-tapping screws under casing should

be on the same straight line. The joints between two casings should be caught

tightly. The undee gap should be the same. Hanging line should be used for

installation. All the sockets of the casing should be kept the same direction and

not used upside down to avoid disable of catching or loose catching. The installed

casings should be the same plane with the planeness deviation not more than

5mm. The installation of the casing in the corner should have angle wrapping

board and use self-plugging rivet to fix itself with the outer casing. The installation

of the upper corner and down corner should be the same line and not fully reach

the stiffening bar but leave a space about 20mm. The door hole should use

aluminum table-flap to embroider with bevel. Pay attention not make the angle

and flap concave during pulling rivet which affecting its beauty. Each layer of outer

casing should be selected strictly according to the size showed in the designing

paper without random cutting and jointing.

5.4. Part pipes and equipment heat-insulation of Design Institute

5．4．1 Pipes heat-insulation are most assembly-type styling products, such as

rock wool shell and aluminum silicate. For the single layer heat insulation circle

and semi-circle horizontal pipes, the vertical joints should be next to the both

sides of the axial line of the pipes. The vertical joints of cuneiform tile fragment

heat insulation products should avoid staying on the top of the pipes. The

layers should be staggered jointed for delamination heat insulation. The

vertical joint should be 15º, while the hoop joint should >mm. The outer layer

vertical heat insulation should avoid staying on the top of the pipes. Double

galvanized iron wire (Ф1.2—Ф1.6mm) should be used to wrap circularly for

each layer of heat insulation, with a distance of 100mm to the terminal.

Embroider the wire into the heat insulation after tightening.

The hear insulation of the vertical pipe should use supporting assembly

which is made of plain carbon steel or profiled bar. A bearing bracket should be

set up every other 2 m for the pipe whose medium temperature is higher than

350 . A bearing bracket should be set up every other 3 m for the pipe whose℃




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medium temperature is lower than 350 . The width of the bracket should be℃

10mm less than the thickness of the main insulation layer. Transfer ring should be

used according to equipment technique documents if the pipe is forbidden

welding. Bracket is unnecessary if hook nails are equipped. Dilatation joint should

be set up every other 3-5m for the main steam and hot arc high temperature

pipes. The dilation joint should be 20mm wide normally with textile rope wrapped

or cellucotton padded. Dilatation joints should be left in the extension direction for

the insulation of the parts around the extension joints and sliding support. Dilation

joints should be left in extension direction for obstacle parts (such as the place for

pipe going through platform etc.).

Insulation encloser should be set alone for welding line of pipe measuring

point with obvious mark for inspection and not damaging other insulation layers.

Flange and valve should be made into removable heat box for the continence of

examination and disassembly.

The protective layer is the last procedure after the installation of pipe and

heat insulation, which is also decorative. The protective layer covers a massive

square, and is the key point of the appearance quality of the whole factory. Thus,

the protective layer should be straight, even, neat and pretty. The protective

layer should also be waterproof and have a stable construction since it has to

suffer from the rain all the entire year.

The axial joint of the protective layer for horizontal and oblique pipe should

be laid 15º advisable up or down horizontal shaft usually with the seam facing

down and joint remainder about 50mm in hidden places as far as possible. The

joint remainder for hoop jointing should be about 50mm usually. The joint

remainder for big diameter, steam pipe and exposed pipes is 75-100mm. All the

joints must be paid attention to the flow direction to avoid inflowing water, and

meet the expansion requirements without built-in fitting but be fixed by self-

tapping screw or self-plugging rivet with gap between 150-200mm.

5．4．2 Flexible construction methods can be adopted according to the section

size, operating conditions and the heat insulation materials. Wrapping heat

insulation method is adopted as a usual, namely, galvanized iron wire or other




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metal materials (such as metal band) are used to wrap for fixation.

Dredging water gradient should be set for large area of flat topping

equipment heat insulation. Besides, lightweight cast-in-situ concrete structure

can also be adopted.

The insulation layer should leave a horn shape gap for the flange base,

liquid water gauge, inspection door hole, heat measure device base and other

parts such as equipment name card on the surface of the equipment. The size of

the gap should meet the requirements of the running inspection or maintenance

conditions.

The insulation of the same layer should be staggered jointed, while

overlapped jointed for different layers. A long jointed seam should be formed in

the direction of the length of the insulation board; while a staggered jointed

seam should be formed in the direction of the width of the insulation board. The

length of the staggered seam should not be less than 1/3 of the insulation board.

The construction of the heat insulation layer can be illustrated into

followings according to the appearance characteristics:

The casing protective layer is usually used for large area flat wall

equipment, such as boiler outer casing. It is complicated to fix the casing and

needs supporting parts on the equipment. The setting method is adjusted

according to the geometrical shape, size and profiled board.

Mixed protective layer is usually for the heat insulation of can. On both sides

of one cover of the protective layer assembly board, there are processed

inserting border, and faucets both sides of the other cover. The fixation relies on

the inserting and catching between the boards, and essential fixing pieces (such

as the welded screw on the equipment). Draw and pre-make the board

according to the shape and size of the equipment wall before insulation.

The fixation relies on the staggered joint, inserting joint and catching joint

without setting any other construction between the metal shells for some canned

protective layer, which belongs to normal protective layer. The installation

construction illustrated on the right chart should be adopted advisable for the

can shape equipment which needs rigid products for heat insulation. The

catching joint should be adopted for the hoop seam formed by axial seam and




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terminal dish shape shell. If the equipment adopts soft or semi-rigid products for

heat insulation, the catching seam should be changed into fixation inserting

seam on the right chart. The inserting length should be 30mm for the equipment

exposed or in damp environment. The normal protective layer seam should use

self-tapping screw (soft insulation) or self-plugging rivet (rigid insulation) to fix

with gap between 200-250mm.

The outside of the sphere head of can shape equipment should use valvular

protective layer. Chrysanthemum valvular seam adopts fixing staggered and

inserting joints, in the meantime, self-tapping screw or self-plugging rivet to fix

with a horizontal gap between 200mm. The hoop seam should be closer to make

at least two places fixed by self-tapping screw or self-plugging rivet on each

valvular of chrysanthemum and make it homomorphic.

5．4．3 The heat insulation for vent: some vents set stiffening board horizontally

and vertically on the outer wall, usually adopting heat insulation products and

making the same length (about 200mm) with stiffening line to lose weight and

absorb vibration source. To avoid convection, lay convection band on the outer

wall of the vent with gap between 400mm and Ф4 nail fixed. Fix steel to the vent

stiffening board, and then weld bracket and angle iron. Put heat insulation

materials on the net, fix them with nails and self-locking spacer for soft materials,

and then install metal casing on the surface. Angle iron leg is usually welded to

the outer wall for the no stiffening board vent with the 10mm higher than the

insulation thickness. Angle iron should be fixed the leg about L30*30*3 after laying

the insulation board with axial space between consistent with the wide wave

center. Rivet or welding is used for the socket band vent. Then install metal

protective shell on the socket band. The socket band and decoration marker shell

should be laid on the outer side of the profiled board and the insulation layer top

respectively. Then install top profile board.

5.5. Factory Equipments and Painting for Pipes

5.5.1 All painting works must follow design of construction drawing and strictly

work as to the design and requirements. Painting tones should be corresponding

with design. Implement the standard if no design can be followed. The




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equipments and pipes which are needed to do color matching before painting

are required to compare the painting sample which is mixed in the special room

with standard colors. It can only mass-produce paintings to take into

construction after the paintings are qualified. Notice that double painting must

follow the instruction to strictly control its proportion before construction. The

thinner should be controlled in 10%.

5.5.2 Surface treatment: It mainly indicate cleaning dust, oil, moisture, scaly oxide

layer, rust, old film. Mainly take these methods below: Use fuel, terebinth,

toluene, dimethylbenzene or acetone to clean oil on surface. Surface rust

removing is relying mainly on manual and mechanism and also take other

cleaning methods as a subsidiary. When take manual rust removing, if the rust is

thin, worker who in charge of it can use abrasive cloth to worn it smooth or use

steel wire brush it at first and then use abrasive cloth to worn it smooth until the

surface appears metallic sheen. If the rust is thick, worker who in charge of it

should at first use alloy-steel shovel to sweep vertically along the surface; then

use emery cloth to make the base smooth repeatedly; finally, use brush to sweep

floating rust. For large scale equipment, tank, take mechanism rust removing

methods, that is manual mechanism cleaning and blast cleaning. Manual

mechanic rust cleaning uses portable electrical grinding wheel, electrical wire

brush or wind brush to get rid of rust and other filths. Abrasive blast cleaning use

0.392～0.588MP compressed air to blast sand to the metal surface to clean filths.

Quartzose sand should be even, dry, with size of between 1-2mm and without

impurity. The compressor air should exclude water and oil. Manual sweeping,

mechanic cleaning, flaming cleaning and doffing cleaning are used for getting rid

of rust.

5.5.3 Paint evenly without penetration or brushing leaking. Paint the second layer

until the first one fully dries. Primer coating vanishing: use tools to dip some

primer for vanishing. If the primer is too thick, use the matched thinner to dilute it.

The vanishing should be even,

5.5.4 The painting surface should be smooth. The painting membrane should

have no bubbles, flowing or leaking. Paint the second layer until the first one fully




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dries if necessary. Top coating vanishing: After the primer is dry, vanish top

coating. The primer should keep the same tone and no layers separating appear.

5.5.5 Paint twice for the steel frame and handrail. Paint once for grid fence and

platform. Spraying can be adopted for vertical parts of the poles and slanting

supporting of steel frame under 18m. Construction for boiler proper structure:

Vanish primer paint again for steel frame of boiler proper and breaking of railing

part’s anticorrosive coating whose rust has been cleaned by grinder. Steel frame,

6. Quality standard and requirement

6．1Concrete and surface construction

No Project Control StandardRemar

k

1Lay and fix concrete wire net

Weld, wrap tightly, flat, smooth

2Connect concrete wire net

Connect tightly, the overlapping of the joint ≥20㎜

3Make the heat insulation concrete surface flat

Deviation≤7㎜，no crack

4Space between the swell concrete （length, width）deviation：±5㎜

5 Concrete appearanceNo honeycomb, no blasted surface, no hole, no crack

6 Top surface Flat, smooth, tidy angle, no exposure

7The deviation for top surface ≤5㎜

8 Top surface crack No crack（except hair crack）6．2 Heat insulation and outer preservation layer construction

No Project Quality ControlRemar

k

1Lay the wire net for main heat insulation layer

The joints of wire net are tightly connected next to the main heat insulation layer. No bumps and no dead-lever on the surface. The expansion wire net should be disconnected.

2 Lay fibro felt、boardTightly fixed to the nails. Tightly connected among sheets. Lay the fibro felt and board alternately.

3Heat insulation thickness deviation +15㎜，-10㎜




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4 Metal shell is ready.Stick to the main heat insulation layer and connect tightly.

5 Joint metal shell.

Hoop joint in down direction. The adjacent joint share the same gradient with pipe. The gap between two adjacent joint should not be less than 30mm (the gap between exposures joint should not be less than 50mm).

6 Joint metal shell size ≥75mm

7Joint and fix metal shell in axial direction

The joints should be kept as big and small types at the same time, make them circle, and fix them with screws.

6．3 Painting construction

No Project Quality ControlRemark

1Clean the surface of the metal.

No oil, no dust, no rust.

2Brush the bottom (with anti-rust paint)

Brush evenly without rust bottom and leakage.

3 The appearanceThe hue should be even and consistent without leakage, dirt, dropping, goffer, mark, membrane, paint grain and obvious mark.

4The re-brush time limit

The re-brush must be done after the former brushing dried.

5 Joint layers Tightly jointed without delamination.

7. Main safety and technical measures

7.1. This project should be checked and approved by relevant departments and

people according to the regulations. And this project can be carried into

executions after reporting to owners and supervisors.

7.2. Technique terms should be explained to workers before construction and

make them understand this project and construction procedures, their own

obligations and responsibilities, and relevant safety and technique

requirements.

7.3. Safety helmet must be worn after entering the construction site. Fasten the

safety helmet belt. The workers in high air must fasten belt according to

regulations.

7.4. The oil, dust and rubbishes must be cleaned up for the equipment surface

of the heat insulation and fireproof materials. Bitumen must be painted for




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the metal surfaces for the hanger, pipe and rolls placed in the fireproof

materials. Butter must be painted for metal surfaces for the equipments

placed in heat insulation materials.

7.5. Except the ones particularly noted, φ6mm steel net should be set for the

fireproof materials whose pouring thickness ≥60mm.

7.6. No heat insulation or fireproof materials are allowed to be put into the

sockets of boiler, instruments and other sockets for test.

7.7. Kin materials should be padded for the unavoidable gap during the

installation of heat insulation materials.

7.8. Heat insulation materials should not be affected with damp. The warehouse

should be dry and no leaking. The construction should be carried on in a fine

day. Temporary rainproof linoleum should be set up or other effective

measures be taken to pile fireproof and heat insulation materials outdoors.

The installation of heat materials and outer protection board should be

processed simultaneously. The heat insulation materials should not bear any

pressures. Transfer them together with the paper carton and open at the

construction site. Lay the heat insulation materials after getting them out of

the carton. Take it easy to avoid unnecessary waste.

7.9. The up and down cross construction should be avoided. Protection

measures should be taken if it is unavoidable.

7.10. The elevator or windlass should be installed tightly and checked for the

machines for vertical transferring. Strictly obey the operation regulations.

The signals should be kept the same for offloading with the hanging cage

bottom padded for safety. No one is allowed to stay in the hanging cage.

Crawls should be set up for entrances and exits.

7.11. Except the parts which are noted in the blueprint to be welded on the steel

construction, no other parts are allowed. The necessary temporary welding

for enforcement can be carried on after the approval of the manufactures.

7.12. The high air work site, all the platforms, aisles and scaffolds should not pile

overload materials. Construction materials should be hanged when they are

needed.




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7.13. All cotton yarn and clout with paint and other flammable wastes should be

kept in metal container with lid, and be disposed in time.

7.14. The antisepsis for poisonous and harmful painting materials in basements

or container should be equipped with enough ventilation devices and

protection tools. The constructors should not be less than two and alternate

regularly.

7.15. Protective hermetical mask, long gloves and special clothes should be

worn during pressure sand-blasting getting rid of rust. The nozzle joint

should be tight. The nozzle is not allowed to point at people. The nozzle

should be repaired or changed after the machines stop and release

pressure.

7.16. The construction site should be rainproof and vented well. The temperature

of the environment should be suitable. No work should be done in the

dramatic change of temperature. The place to store painting materials

should be vented well, fireproof and low temperature. No materials and liquid

is allowed to place on working site.

8. Annex：

Paint color table

Pipe type Appearance color Hoop color

Main steam pipe, reheat piep —— No hoop

Steam extraction pipe —— red

Other steam pipe —— red

Condensing water

conduit（heat insulated） —— Light green

Condensing water

conduit （ non-heat

insulated） Light green No hoop

Feed pipe —— green




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Pipe type Appearance color Hoop color

Chemist supply water pipe

(filtrating brine)Light green white

Spouting —— green

Circulating water black No hoop

Oil pipe yellow No hoop

Cold air duct Light blue No hoop

Hot air duct —— blue

Air, gas pipeline azure No hoop

Nitrogen pipe Light gray red

Underground pipe —— No hoop

Condensing water supply

caseLight green ——

Platform ladder, hanger Silver gray ——

Softening, proportioning

equipments

Blue gray ----

Lye Light gray Dark green


r-gl-13jindal btg heat insulation and painting construction manual

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construction supervisor

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btg heat insulation

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