य द क ई स म त ह त क पय अगल प ठ पर दय पऽ म अ ह त र क उपर ल खत पत पर भ ज द

य पक प रच लन म मस द ल ख षण स पन स दभ द न क तकन क स म त: एम.ई.16: एम.ई.ड. 16:1/ट -39 & 08-09-2008 1 य ऽक इ ज नयर वभ ग प र षद क सभ सद य(य. व.प.) 16:2/ट -6 2 ग स स ल डर वषय स म त एम.ई.ड. 16, ग स स ल डर व वस और फ ट स उप स म त, एम ई ड 16:1 ए व ध लत ऐ स टल न स ल डर, जनर टर, ऐ स टल न प ईपल इन ए व उ च द व ग स स ल डर वषय स म त, एम.ई.ड. 16:3 क सभ सद य क सभ सद य 3 अ य च रखन व ल मह दय(य ), न न ल खत ल ख सल न ह : ल ख वषय एम.ई. 16 (0982) ज च क लए नर ण ग ज क व श ट इप 1 (स इज 1, 2 ए व 3) ग स स लडर व व और स ल डर न कस क श ड क र च डय - श ड क र य स पर 16 अ य स पर 1 क भ रत य म नक मस द (आई स एस 17.040.01:23.020.30) एम.ई. 16 (1031) ब ड शप पर अ नशमन क य जन क लए ज डर हत क ब नड इऑ स इड स लडर व श क भ रत य म नक मस द (आई एस 4152 क त सर प नर ण) (आई स एस 13.220.10; 23.020.30) क पय इन मस द क अवल कन कर और अपन स म तय यह बत त हए भ ज क अ तत: य द यह क शत ह ज ऍ त इस पर अमल करन म आपक यवस य अथव क र ब र म य क ठन ईय आ सकत ह स म तय भ जन क अ तम त थ: 07.11. 2008 य द क ई स म त ह त क पय अगल प ठ पर दय पऽ म अ ह त र क उपर ल खत पत पर भ ज द य द क ई स म त त नह ह त ह अथव स म त म क वळ भ ष स बध ऽ ट ह ई त उपर त ल ख क यथ वत अ तम प दय ज य ग य द क ई स म त तकन क क त क हई त वषय स म त क अ य क पर मश स अथव उनक इ छ पर आग क क य व ह क लए वषय स म त क भ ज ज न क ब द ल ख क अ तम प द दय ज एग यह मस द हम र व ब स ईट www.bis.org.in पर भ उपल ध ह घ यव द, त: उपर ल खत ह त र : न म पद : च. क. व द : व. `एफ. एव म ख (य.इ ज.)

Please correspond at: Phone / Fax: 011-23232509 E-mail: veda@bis.org.in / med@bis.org.in DRAFT STANDARD IN WIDE CIRCULATION Gas Cylinders, Sectional Committee, ME 16 TO: a) The interested members of Mechanical Engineering Division Council, MEDC b) All members of Gas Cylinders Sectional Committee, ME 16, Gas Cylinder Valves and Fittings Subcommittee, ME 16:1 and Dissolved Acetylene Cylinders, Generators, Acetylene Pipelines and High Pressure Gas Cylinders Subcommittee, ME 16:3 c) All others Interested Dear Sirs, Please find enclosed the following document: DOCUMENT DESPATCH ADVICE Ref: ME 16:1/T-39 & Date: 08 09 08 16:2/T-6 Doc. No. ME 16 (0982) ME 16 (1031) TITLE Specification for inspection gauges for checking Type 1 (Sizes 1, 2 and 3) taper threads of gas cylinder valves and cylinder necks Taper 1 in 16 on Diameter (ICS 17.040.01; 23.020.30) Seamless carbon dioxide cylinders for fire-fighting purposes on boardship Specification (third revision of IS 4152) (ICS 13.220.10; 23.020.30) Kindly examine the Draft Standard and forward your views stating any difficulties which you are likely to experience in your business or profession, if this is finally adopted. Last date for receipt of comments: 07 Nov 2008. Comments, if any, may please be made in the format as given overleaf and mailed to the undersigned at the above address. In case no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above document as finalized. However, in case of comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional committee for further necessary action if so desired by the Chairman, Sectional Committee. These documents are also hosted on BIS website www.bis.org.in. Thanking you, Yours faithfully Encl: As above (C.K. Veda) Scientist F & Head (Mech Engg) NOTE-WHERE PRINCIPAL AND ALTERNATE MEMBERS OF AN ORGANISATION ARE FROM THE SAME STATION, ONE COPY OF THE DOCUMENT IS SENT ONLY TO THE PRINCIPAL MEMBER WHO MAY KINDLY SHARE THIS WITH HIS ALTERNATE AS WELL.

Draft For Comments Only Draft Indian Standard SPECIFICATION FOR INSPECTION GAUGES FOR CHECKING TYPE 1 (SIZES 1, 2 and 3) TAPER THREADS OF GAS CYLINDER VALVES AND CYLINDER NECKS - TAPER 1 IN 16 ON DIAMETER ICS 17.040.01: 23.020.30 Not to be reproduced without the permission of Last date for receipt of BIS or used as a STANDARD comments is: 07 Nov 2008 FOREWORD Adoption clause will be added later on. Taper threads of gas cylinder valve stems and cylinder necks as per type 1 sizes 1, 2 and 3 having taper 1 in 16 on diameter are provided in IS 3224: 2002 Indian Standard for Valve Fittings for Compressed Gas cylinders excluding Liquefied Petroleum Gas (LPG) Cylinders and type 1size 2 threads are standardized in IS 8737:1995 Indian Standard for Valve Fittings and Cylinders for use with Liquefied Petroleum Gas (LPG) cylinders of more than 5 litre water capacity. These threads conform to the NGT threads as per ANSI/CSA/CGA STANDARD V-1 1987 Compressed Gas Cylinder Valve Outlet and Inlet Connection issued by American National Standard Institute and Compressed Gas Association, Inc., this being the specification forming the basis of these threads Relevant portions of the specification of the threads have been reproduced in this revision. With this requirement to inspect the taper of the threads, the method of checking relative engagement of the product threads in the threaded and plain taper ring gauges has been included in this draft specification. Currently IS 9687 and IS 9121 specifications are available for the gauges to check the threads of Size 1 and Size 2 respectively. However, no Indian Standard Specification is available at present for the gauges to check size 3 threads. It has, therefore, been considered necessary that a composite Indian Standard be prepared to cover the gauges to check the threads of all the three sizes. 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 or analysis, shall be rounded off in accordance with IS 2:1960 Rules for rounding off numerical values ( revised ). 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 This standard prescribes dimensions, tolerances and material requirement of inspection gauges recommended for checking the taper threads on valve stems and the taper threads on cylinder necks for compressed gas cylinders - the threads conforming to Type 1 (size1, 2 and 3) of IS 3224 and Type 1Size 2 threads of IS 8737. Note - This type of thread also conforms respectively to size ½, ¾ and 1 NGT of ANSI/CSA/CGA STANDARD V-1 1987 Compressed Gas Cylinder Valve Outlet and Inlet Connection issued by American National Standard Institute and Compressed Gas Association, Inc. 2 REFERENCES The Indian Standards listed below contain provisions, which through reference to this context constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: IS No. Title 1586: 1988 Method for Rockwell Hardness Test for metallic material (Scales A-B-C-D-E-F-G-H-K) 1570(Part 2):1979 Schedules for wrought steels: Part 2 Carbon Steels (unalloyed steels) 3224:2002 Valve fittings for compressed gas cylinders excluding liquefied petroleum gas (LPG) cylinders Specification (second revision) 8737:1995 Valve fittings for use with liquefied petroleum gas (LPG) cylinders of more than 5 litre water capacity Specification 3 MATERIAL Suitable wear resisting steel, for example 85C6 of 1570(Pt 2) may be used. 4 DIMENSIONS OF THREADS ON VALVE STEMS AND CYLINDER NECKS 4.1 Basic Thread Form - (See Fig. 1). 4.2 Principal Dimensions - (See Fig. 2). 4.3 Limits on Crest and Root Truncations - (See Fig. 3). 4.4 Limits on Size Final inspection limits on size (pitch diameter) of both external and internal threads are ±1 turn from basic, although the preferred working limits are ± ½ turn from basic. 4.5 Limits on Taper

Should there be an unintentional difference in taper at the pitch elements of the valve and of the cylinder threads; it is preferred to have greater tightness at the bottom of the valve. In view of this requirement, the limits in gauging shall be as under: a) The taper on pitch elements of external threads shall be 1 in 16 on diameter, with a minus tolerance of one turn but no plus tolerance in gauging; and b) The taper on pitch elements of internal threads shall be 1 in 16 on diameter, with a plus tolerance of one turn but no minus tolerance in gauging. 4.6 The tolerance on 60 o angle of threads shall be ±2 o. 4.7 The maximum taper on pitch line per millimeter shall be 0.0729 and the minimum 0.0573. 5 DIMENSIONS AND TOLERANCES OF GAUGES FOR CHECKING THREADS IN CYLINDER NECK (INTERNAL THREADS) 5.1 Taper Thread Plug Gauge for checking Pitch Diameter In Cylinder Neck L 1 Gauge A - (See Fig. 4). 5.2 Full Form Taper Thread Plug Gauge for checking engagement of threads in Cylinder Neck L 9 - Gauge B - (See Fig. 5). 5.3 Plain Taper Plug Gauge for Checking Crest Truncations of Thread in Cylinder Neck Gauge C - (See Fig. 6). 6 DIMENSIONS AND TOLERANCES OF GAUGES FOR CHECKING THREADS ON TAPER STEMS (EXTERNAL THREADS) 6.1 Taper Screw Ring Gauge for checking Pitch Diameter of threads on Taper Stem in length L 1 - Gauge D - (See Fig. 7). 6.2 Full Form Screw Ring Gauge for checking relative engagement of threads of Taper Stem L 8 Gauge E - (See Fig. 8) 6.3 Plain Taper Ring Gauge for checking Crest Truncation of External Threads on stem Gauge F - (See Fig. 9). 7 DIMENSIONS AND TOLERANCES OF MASTER GAUGES 7.1 Master Taper Screw Ring Gauge to check L1 (Gauge A) and L9 (Gauge B) Taper Thread Plug Gauges Gauge M-INT - (See Fig. 10). 7.2 Master Taper Thread Plug Gauge To Check L1 (Gauge D) and L8 (Gauge E) Taper Screw Ring Gauges Gauge M-EXT - (See Fig. 11).

8 USAGE OF GAUGES Usage of gauges is given in Annex A. 9 GENERAL REQUIREMENTS OF GAUGING SURFACES 9.1 Hardness Rockwell C 60 to 62 when determined according to IS 1586. 9.2 Finish Gauging surfaces shall be ground and suitably stabilized. The method of stabilizing shall be as per agreement between the manufacturer and the customer. surfaces other than the gauging surface shall be finished smooth. 10 DESIGNATION The gauges shall be designated by: Size of the thread, gauge type and number of this standard. Example: The screw ring gauge for checking pitch diameter of taper stem at length L 1 shall be designated as: ¾ x 14NGTL1 Gauge D, IS - - - - 11 CORROSION PROTECTION AND PACKING Gauges shall be protected against climatic conditions by application of any anticorrosive coating. Packing shall be suitable to prevent damage in transit. 12 MARKING 12.1 The gauge shall be marked with the following: a) Designation; b) Manufacturer s name or trade mark; and c) Serial number.

12.2 BIS Certification Marking Each gauge may also be marked with the Standard Mark. 12.2.1 The use of BIS certification mark is governed by the provisions of Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the license for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

ANNEX A (Clause 8) USAGE OF GAUGES A-0 Special gauges are required for the gauging of these threads because of their length and rigid requirement for sealing the compressed gas against leakage. A-1 PITCH DIAMETER OF EXTERNAL THREAD To check the size of external thread for pitch diameter, the taper screw ring gauge D is used. This gauge D (also known as L 1 Ring Gauge) is the primary gauge because the reading taken on this gauge will be needed for use when additional gauging is done. A-1.1 The taper screw ring gauge E (also known as L 8 Ring Gauge) is used to check the taper of the external threads. It is screwed on to the valve stem thread and its engagement relative to that of L 1 ring read at A-1 is noted. A-2 CREST TRUNCATION OF EXTERNAL THREAD To check the crest truncation of external thread, the plain taper ring gauge F (also known as truncation gauge) is used. This gauge is placed over the taper thread and the engagement relative to that of L 1 ring read at A-1 is checked. A-3 Gauging of the thread with the three ring gauges (Fig. 7 to 9) is illustrated hereunder: a) To set the L 1 and L 8 taper screw ring gauges (gauges D and E respectively), use the master taper thread plug gauge M-EXT (Fig. 11) screwed into the rings and set the reading on the dial indicator at zero with the plunger tip on the indicator resting against small end of the master taper thread plug ensuring that the whole millimeter readings on the small dials is also equal on both the dials. b) To set the plain taper truncation ring (gauge F), insert the setting distance piece (Fig. 12) in to the gauge with the face X of the setting plug pressed against the large end face of the truncation ring. Set the plunger tip of the dial indicator against the face Y of the setting plug and adjust the dial at zero ensuring that the whole millimeter readings on the small dial is identical to that on the small dials of the two gauges in (i)(a) above. c) Screw the valve stem in taper screw ring D and note the reading on dial indicator. The reading should be zero (as set on the dial indicator) ± A-3(c)1 (see table below for value) mm for the purpose of acceptability of the thread size. Note this reading as R (Ext)L1

d) Screw the valve stem into gauge E. The reading on the dial indicator should be R (Ext)L1 + A-3(d)1 / - 0 (see table below for value) for the purpose of acceptability of the requirement of relative engagement (4.5). e) Place the valve stem in to the plain taper ring gauge F. The reading on the dial Indicator should be R (Ext)L1 + A-3(e)1 / -0 (see table below for value) for the purpose of acceptability of the crest truncation of the thread. A-4 PITCH DIAMETER OF INTERNAL THREAD To check the size of the internal thread for pitch diameter, the taper thread plug gauge A is used. This gauge A (also known as L 1 plug gauge) is the primary gauge because the reading taken on this gauge will be needed for use when additional gauging is done. A-4.1 The gauge B (also known as L 9 plug gauge) is used to check the engagement relative to that with L 1 plug. A-5 CREST TRUNCATION OF INTERNAL THREAD To check the crest truncation of the internal thread, the plain taper plug gauge C (also known as truncation gauge) is used. This gauge is placed in to the internal thread and the engagement relative to that with L 1 plug is checked. A-6 The gauging of the internal threads with these gauges as stated above is illustrated hereunder with reference to Fig. 13: a) Using the master taper screw ring shown in Fig. 10 and the plunger tips of the respective dial indicators resting against the face of the master ring, set the readings on all the dial indicators at zero ensuring that the whole millimeter readings on the small dials is also equal on all the three dials. b) Screw the taper thread plug gauge A in to the internal thread to be gauged. The reading should be zero ± A-6(b)1 (see table below for value) mm for the purpose of acceptability of the thread size. Note the reading on the dial indicator as R (Int)L1 c) Screw the taper thread plug gauge B in to the internal thread being gauged. The reading on the dial indicator should be R (Int)L1 +0 / - A-6(c)1 (see table below for value).for the purpose of acceptability of meeting the requirement of relative engagement (4.5). d) Place the plain taper plug gauge C in to the internal thread being gauged. The reading on the dial indicator should be R (Int)L1 + A-6(d)1 (see table below for value)/ -0 for the purpose of acceptability of meeting the requirement of crest truncation of the thread. TABLE FOR THE VALUES OF PARAMETERS SHOWN IN ANNEX A

(All dimensions in millimeters) Parameter Thread size 1 i.e. ½ - 14 NGT Thread size 2 i.e. ¾ - 14 NGT Thread size 3 i.e. 1 11½ NGT A-3(c)1 1.814 1.814 2.2087 A-3(d)1 1.814 1.814 2.2087 A-3(e)1 2.6 2.6 3.2 A-6(b)1 1.814 1.814 2.2087 A-6(c)1 1.814 1.814 2.2087 A-6(d1 2.6 2.6 3.2

For Comments Only Draft India Standard SEAMLESS CARBON DIOXIDE CYLINDERS FOR FIRE - FIGHTING PURPOSES ON BOARDSHIP - SPECIFICATION (Third Revision of IS 4152:1989) ICS 13.220.10; 23.020.30 Not to be reproduced without the permission of Last date for receipt of BIS or used as a STANDARD comments is: 07 Nov 2008 FOREWORD Adoption clause will be added later on. This standard was first published in 1967 and subsequently revised in 1978 and 1989. This is in line revision with the latest ISO 3500 Gas cylinders Seamless steel CO2 cylinder for fixed fire fighting installations on ships. Following major changes have been incorporated in the revision. 1) Included the cylinders of water capacity from 80 to 87 l in the scope. 2) Use of aluminium alloy is permitted as per 15660 for manufacturing cylinders. Periodical testing of carbon-dioxide cylinders for fire fighting purposes on board ships is obligatory under the statutory provisions and is also covered under the International Conference of Safety of Life at Sea, 1960. Often these cylinders are required to be changed at any port in the world. This necessitates that the size of the cylinder used for this purpose should be dimensionally standardized to ensure interchangeability. 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 or analysis, shall be rounded off in accordance with IS 2:1960 Rules for rounding off numerical values ( revised ). 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 deals with light-weight seamless carbon dioxide cylinders of water capacity 45 l, 67.5 l and 80 to 87 l used in fire-fighting installations on boardships. It lays down the requirements for the material to be used in the manufacture of these cylinders, their construction, marking and testing. It also specifies the principal external dimensions of the cylinders.

2 REFERENCES The Indian Standards listed below contain provisions, which through reference to this context constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: IS No. Title 3224:2002 Valve fittings for compressed gas cylinders excluding liquefied petroleum gas (LPG) cylinders (second revision) 4379:1981 Identification of the contents of industrial gas cylinders (first revision) 7241:1981 Glossary of terms used in gas cylinder technology (first revision) 7285(Part 2):2004 Refillable seamless steel gas cylinder Specification: Part 2 Quenched and tempered steel cylinders with tensile strength less than 1100 MPa (112 kgf/mm²) (third revision) 15660:2006 Refillable transportable seamless aluminium alloy gas cylinders Specification. 3 TERMINOLOGY 3.1 For the purpose of this standard, the following definition in addition to those given in IS 7241 shall apply. 3.1.1 Tare The combined mass of empty cylinder, neck collar, valve and siphon tube expressed in kg. 3.2 Permissible Filling Ratio Maximum permissible mass of carbon dioxide in kilograms per litre of cylinder water capacity. 4 GENERAL CHARACTERISTICS 4.1 Cylinder 4.1.1 The cylinder shall be designed for a minimum, test pressure of 250 Kgf./Cm². Steel cylinders shall conform to the requirement of IS 7285 (Part 2) and Aluminium cylinders shall conform to the requirements of IS 15660. 4.1.2 The external dimensions of steel cylinder, illustrated in Fig. 1, shall be in accordance with the values given in Table 1. 4.2 Valve 4.2.1 The valve inlet connection shall be in accordance with IS 3224. The valve outlet connection shall be W 21.8 x 1.814 mm. external right hand as per outlet no. 7 of IS 3224. 4.2.2 The internal diameter of the valve inlet and outlet opening shall be such that 85 percent of the CO 2 contents can be discharged into the fire location within 2 min. Siphon tubes shall be durably fitted to the valve stem s internal threading.

4.3 Pressure relief Devices A pressure - relief device shall be fitted to prevent the cylinder gas pressure rising above 225 Kgf./cm². The relief pressure shall be indicated on the valve. Fig. 1 - External Dimensions of Steel Cylinders (Clause 4.1.2) Size Water Capacity Table 1 General Characteristics for steel cylinders (Clause 4.1.2) Maximum Permissible Mass of CO 2 Maximum Tare Mass Outside Dia D o * Length L* Filling Ratio Minimum Test Pressure Lt. Kg. Kg. mm mm Kgf/cm 2 A 45 30 55 227 to 1263 to 0.667 250 235 1420 B 67.5 45 80 265 to 1395 to 0.667 250 273 1562 C 80 to 87 53 to 58 96 to 104 260 to 290 1680 to 1800 0.667 250 * In order to obtain the minimum specified volume, it is necessary to provide ranges for both outside diameter and length having regards to the possible variations in manufacturing process involved. Note: The dimensions and general charterstics for steel cylinders are given in Fig1 and table 1. Comments on dimensions and general charterstics for aluminium cylinders are also invited. 5 CYLINDER MARKING The cylinder shall be marked in accordance with IS 7285(Part 2) or IS 15660, as appropriate. The cylinder shall be permanently stamp marked on the shoulder with the chemical symbol CO 2 or the name CARBON DIOXIDE. The presence of the siphon tube, as fitted to the valve shall be indicated by means of a corrosion-resistant ring between the valve and the cylinder.

5.1 BIS Certification Marking The gauges may also be marked with Standard Mark. 5.1.1 The use of Standard Mark is governed by the provisions of Bureau of Indian Standards Act, 1986 and the rules and Regulations made thereunder. The details of conditions under which the license for use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. 6 COLOUR IDENTIFICATION 6.1 The cylinder shall be painted externally in accordance with the colour scheme specified in IS 4379 or as specified by statutory authority. 6.2 Export Market Cylinder manufactured for export shall be painted externally as agreed to between the purchaser and the manufacturer. 7 RECORDS Records shall be kept of all the tests made at the cylinder manufacturer s works and copies shall be forwarded to the purchaser of the cylinder and the inspecting authority. 8 PREPARATION FOR DESPATCH 8.1 Before being dispatched from the manufacturer s works, all cylinders shall be thoroughly cleaned and all particles of grit, filling or other matter which may have collected inside the cylinder in the course of manufacture, heat treatment and testing shall be removed completely and the cylinders dried internally by heating uniformly to a temperature not exceeding 300ºC. The outside surface of the cylinder shall be given a suitable protective coating before despatch.