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है”ह”ह

IS 4957 (1968): Mantle Holders, Nozzle Type [MED 26:Mechanical Engineering]

IS : 4957 - 1968

Indian Standard SPECIFICATION FOR

MANTLE HOLDERS, NOZZLE TYPE

(First Reprint NOVEMBER 1979)

UDC 683.868.74

© Copyright 1969 INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002 Gr 2 February 1969

(Reaffirmed 2007)

AMENDMENT NO. 1 FEBRUARY 1981 TO

IS:4957-1968 SPECIFICATION FOR MANTLE HOLDERS, HOZZLE TYPE

Alteration (Page 3, Fig. 1, informal table, second column,

last entry) - Substitute 'N 27 × 2.0 ' for 'M 26 × 2 .0 ' .

(CPDC 3)

Reprography U n i t , I S I , N e w D e l h i , India

IS : 4957 - 1968

Indian Standard SPECIFICATION FOR

MANTLE HOLDERS, NOZZLE TYPE Oil Burning Appliances ( Pressure Type ) Sectional Committee,

CPDC 3 Chairman

SHRI S . N . M U K E R J I Members

SHRI A. GHOSH ( Alternate to Shri S. N. Mukerji )

SHRI P . N . BHAMBI SHRI P. K . GOEL ( Alternate )

SHRI S. K. DASS GUPTA DEPUTY DIRECTOR STANDARDS

( L o c o ) SHRI K. GANGAYYA SHRI N . K . GHOSE

SHRI R . N . GUPTA

Representing National Test House, Calcutta

Indian Institute of Petroleum ( CSIR ), Dehra Dun

Central Fuel Research Institute ( CSIR ), Dhanbad Railway Board ( Ministry of Railways )

Directorate General of Health Services, New Delhi Directorate General of Technical Development,

New Delhi Directorate General of Supplies & Disposals

(Inspection Wing ), New Delhi SHRI H. C. MALHOTRA ( Alternate )

SHRI A. R. A. KRISHNAN

SHRI S . P. TRIPATHI ( Alternate ) SHRI P. C. N. MAJUMDAR

SHRI BRIJRAJ SHANKAR MISHRA SHRI S . M . SHAH SHRI A. B. R A O ,

Director ( Consr Prod )

Chief Inspectorate of General Stores [ Ministry of Defence ( D G I ) ], Kanpur

Indian Non-Ferrous Metals Manufacturers' Associa-tion, Calcutta

Prabhat Udyog Ltd, Bombay Optimohar Industries ( Pvt) Ltd, Bombay Director General, ISI ( Ex-officte Member )

Secretary SHRI R . I . MIDHA

Deputy Director ( Consr Prod ), ISI

Mantle Holders Subcommittee, CPDC 3 : 3 Convener

SHRI S . N . M U K E R J I Members

SHRI K . K . GAGGAR

National Test House, Calcutta

Prabhat Udyog Ltd, Bombay SHRI A. K. CHATURVEDI ( Alternate )

SHRI B . K . GHOSE Chief Inspectorate of General Stores [ Ministry of Defence ( D G I ) ], Kanpur

SHRI L. C. BHANDARI ( Alternate ) D R S . C . N I Y O G I SHRI SHIVRAM SHRIPAD OGALE

Scientific India Glass Co Ltd, Calcutta Ogale Glass Works Ltd, Ogalevadi

SHRI NARHAR RAOJI KULKARNI ( Alternate )

I N D I A N S T A N D A R D S I N S T I T U T I O N MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

IS : 4957 - 1968

Indian Standard SPECIFICATION FOR

MANTLE HOLDERS, NOZZLE TYPE

0. F O R E W O R D 0.1 This Indian Standard was adopted by the Indian Standards Institution on 24 December 1968, after the draft finalized by the Oil Burning Appliances ( Pressure Type ) Sectional Committee had been 'approved by the Consumer Products Division Council. 0.2 Mantle holder is that component in oil pressure lantern to which gas mantle is tied. The body of mantle holder is to be made of ceramics, capable of withstanding tcmpreraturc changes that arc normally experienced. 0.3 Need for this specification has been felt due to publication of the following specifications:

IS : 1384-1964 Oil pressure lanterns ( revised ) IS : 2788-1964 Gas mantles IS : 3164-1965 Oil pressure lamps, hanging type

0.4 Only the sizes of mantle holders included in IS : 1384-1964 have been covered in this specification. The sizes of mantle holders covered in IS : 3164-1965 are under investigation and will be included in due course, if so felt necessary by this Sectional Committee. It is expected that it will help the industry to gear up the production to the requirements of this speccification. 0.5 Clauses 5.1.2, 7.1 and 8.1 call for agreement between the purchaser and the supplier or which permit the purchaser to use his option for selection to suit his requirements. 0.6 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE 1.1 This standard covers material, dimensional and performance require-ments of nozzle type mantle holders.

*Rules for rounding off numerical values ( revised ).

2

IS : 4957 - 1968

2. MATERIAL

2.1 Mantle holders shall be manufactured from suitable ceramics, prefer-ably zircon porcelain, capable of withstanding temperature changes that are normally experienced and shall also comply with the tests enumerated in 5.1.1 to 5.1.3.

3. SHAPE AND DIMENSIONS

3.1 Typical shape and dimensions of the mantle holder are shown in Fig. 1.

SIZE DESIGNATION

1 2 3

A ( ISO PROFILE )

M 16 × 2.0 M 22 × 2.0 M 26 × 2.0

B DIA mm

12 16 20

FIG. 1 MANTLE HOLDER, NOZZLE TYPE

4. WORKMANSHIP AND FINISH

4.1 Mantle Holders shall have good finish, but not glazed and these shall fit properly. The edges shall be free from burrs, warps and such other defects which may impair their serviceability. The inner edges of the small holes shall be sharp and the threaded portion shall be perfectly round.

3

IS : 4957 - 1968

5. TESTS 5.1 The mantle holders shall satisfy the test requirements given in 5.1.1 to 5.1.3.

5.1.1 Thermal Shock Resistance — When tested in accordance with Appendix A, the test piece shall stand 30 cycles without developing any cracks or total breakdown.

5.1.2 Mechanical Shock Resistance — The mande holder together with the mantle shall be mounted on the mechanical shock testing machine as shown in Fig. 2. The mantle shall be burnt for a continuous period of 2 hours or for a period as agreed to between the purchaser and the supplier. Thereafter it shall be subjected to mechanical shock test on the testing machine ( see Fig. 2 ). Should the mantle holder subjected to this test fail to withstand 300 shocks, the mantle holder shall be deemed to have failed to satisfy the requirements of this specification.

5.1.3 Water Absorption — The water absorption of the material shall be not more than 0.5 percent when tested in accordance with Appendix B.

6. MARKING 6.1 Each package of mantle holders shall be marked with the following:

a) Manufacturer's name, initials or registered trade-mark; b) Size of mantle holder; and c) Country of origin.

6.1.1 The packages of the mantle holders may also be marked with the ISI Certification Mark.

NOTE — The me of the ISI Certification Mark is governed by the provisions of the Indian Standards Institution (Certification Marks) Act and the Rules and Regulations made thereunder. The ISI Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-denned system of inspection, testing and quality control which is devised and supervised by ISI and operated by the producer. ISI marked products are also continuously checked by ISI for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the ISI Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.

7. PACKING 7.1 Mantle holders shall be packed according to the best trade practice or as agreed to between the purchaser and the supplier.

8. SAMPLING 8.1 Sampling and acceptance criteria for mande holders shall be as agreed to between the purchaser and the supplier. A recommended scheme for the same is given in Appendix C.

4

IS : 4957 - 1968

FIG

. 2

M

ECH

AN

ICA

L.

SHO

CK

T

EST

ING

M

AC

HIN

E

5

IS : 4957 - 1968

A P P E N D I X A ( Clause 5.1.1 )

THERMAL SHOCK RESISTANCE TEST

A-1. PROCEDURE

A-1.1 The test piece shall be introduced into a semi-muffle type furnace, the temperature of which shall be raised to 1 000 ± 10°C. It shall be held at this temperature for 10 minutes and then taken out with a pair of tongs warmed suitably for some time. The piece shall be then placed on a brick held at room temperature and draught free position. It shall be left to cool in this position for 10 minutes and replaced in the furnace for the next 10 minutes. This cycle shall be repeated until the piece develops a crack or breaks down otherwise.

A P P E N D I X B (Clause 5.1.3)

WATER ABSORPTION TEST

B-0. PRINCIPLE

B-0.1 The amount of water absorbed by article shall be determined by boiling the article in distilled water and finding the increase in weight.

B-1. TEST PIECES

B-1.1 Five pieces from whole articles shall be cut or obtained by breaking.

B-2. PROCEDURE

B-2.1 The test pieces shall be cleaned with distilled water and dried to a constant weight at a temperature between 110° and 115°C and then cooled to room temperature in a desiccator. These shall be weighed to an accuracy of 0.01 g, immersed in distilled water in a beaker and boiled for 2 hours. A few glass beads may be used in such a way that these test pieces do not touch the bottom of the beaker. After boiling, the pieces shall be allowed to remain in water for 20 hours and cooled to room temperature. These shall then be taken out and wiped carefully with a soft damp cloth to remove any excess moisture adhering to the surfaces and then weighed.

6

IS : 4957 - 1968

B-2.2 Water absorption of the test pieces shall be calculated as follows:

Percentage water absorption =

where W2 = weight of the test pieces after boiling with water, and W1= weight of the dry test pieces.

B-2.3 Average of 5 test pieces shall be reported.

A P P E N D I X C ( Clause 8.1 )

RECOMMENDED SAMPLING SCHEME AND CRITERIA FOR CONFORMITY FOR MANTLE HOLDERS

C-1. LOT

C-1.1 In any consignment all the mantle holders manufactured from the same materials under essentially similar conditions of production shall be grouped together to constitute a lot.

C-1.1.1 Each lot shall be inspected separately to ascertain its conformity or otherwise to the requirements of this specification.

C.2. SELECTION OF SAMPLES

C-2.1 The number of mantle holders to be selected at random from a lot shall depend upon the size of the lot and shall be in accordance with col 1 and 2 of Table 1. C-2.2 The holders in the sample shall be selected at random from the lot and in order to ensure the randomness of selection, random number tables may be used.

C-3. NUMBER OF TESTS AND CRITERIA FOR CONFORMITY

C-3.1 Each holder in the sample shall be inspected for material ( see 2.1 ), shape and dimensions (see 3 .1 ) , and workmaship and finish (see 4 .1 ) . A holder failing to meet any one or more of the requirements of this standard shall be considered as defective.

C-3.1.1 The lot shall be declared as conforming to the requirements tested for in C-3.1 if the number of defective holders in the sample as

7

IS : 4957 - 1968

obtained in C-3.1 does not exceed the permissible number of defectives given in col 3 of Table 1.

TABLE 1 SAMPLE SIZE AND CRITERIA FOR CONFORMITY

NUMBER OF HOLDERS IN THE LOT

(1) Up to 100 101 „ 150 151 „ 300 301 „ 500 501 „ 1 000

1001 ,, 3 000 3 001 and above

NUMBER OF HOLDERS TO BE

SELECTED IN THE SAMPLE

(2) 8

13 20 32 50 80

125

PERMISSIBLE NUMBER OF DEFECTIVE

HOLDERS

(3) 0 0 0 1 2 3 5

SUB-SAMBLE FOR THERMAL SHOCK,

MECHANICAL SHOCK AND WATER

ABSORPTIOPN TESTS

(4) 2 3 5 8 13 20 32

C-3.2 The lot having found conforming in C-3.1.1 shall be subjected to thermal shock resistance, mechanical shock resistance and water absorption tests ( see 5.1.1 to 5.1.3 ). For this purpose a sub-sample of sizes given in col 4 of Table 1 shall be selected at random from those mantle holders which have been tested and found conforming under C-3.1.1. Separate sub-samples will have to be selected and tested for thermal shock resistance, mechancial shock resistance and water absorption. The lot shall be declared as conforming to the requirements of these tests only if all the pieces in the sub-sample pass the requirements of the test.

8

INTERNATIONAL SYSTEM OF UNITS ( S I UNITS)

Base Units

Quantity

Length Mass Time Electric current Thermodynamic

temperature Luminous Intensity Amtount of substance

Supplementary Units Quantity

Plane angle Solid angle

Derived Units QUANTITY

Force Energy Power Flux Flux density Frequency Electric conductance Electromotive force Pressure, stress

Unit metre kilogram second ampere kelvin

candela mole

Unit radian steradian

UNIT

newton joule watt weber tesla hertz Siemens volt pascal

Symbol m kg s A K

cd mol

Symbol rad sr

SYMBOL

N J W Wb T Hz S V Pa

DEFINITION

1 N = 1 kg.m/s2

1 J = 1 N.m 1 W = 1 J/s 1 Wb = 1 V.s 2 T = 1 Wb/m2

1 Hz = 1 c/s (s-1) 1 S = 1 A/V 1 V = 1 W/A 1 Pa = 1 N/m2

INDIAN STANDARDS INSTITUTION Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones : 26 60 21, 27 01 31 Telegrams : Manaksanstha Regional Offices: Western : Novelty Chambers, Grant Road Eastern : 6 Chowringhee Approach Southern : C.I.T. Campus, Advar Branch Offices: 'Pushpak', Nurmohamed Shaikh Marg, Khanpur 'F' Block, Unity Bldg, Narasimharsja Square Gangotri Complex Bhadbhada Road,T.T. Nagar 22E Kalpana Area Ahimsa BIdg, SCO 82-83. Sector 17C 5-8-56/57 L. N. Gupta Marg D-277 Todarmal Marg, Banipark 117/418B Sarvodaya Nagar Patliputra Industrial Estate Hantex Bldg (2nd Floor), Rly Station Road

BOMBAY 400007 CALCUTTA 700072 MADRAS 600020

AHMADABAD 380001 BANGALORE 560002 BHOPAL 462003

Telepone 37 97 29 23-08 02 41 24 42

2 03 91 2 76 49 6 27 16

BHUBANESHWAR 751014 5 36 27 CHANDIGARH 160017 HYDERABAD 500001 JAIPUR 302006 KANPUR 208005 PATNA 800013 TRIVANDRUM 686001

2 83 20 22 10 83 6 98 32 8 12 72 6 28 08

32 27

Reproduced by Reprography Unit, ISI, New Delhi