CSA CGA 9 2-M88-1988 Manually Operated Shut-Off Valves for Gas Piping Systems.pdf

1、CGA 9.2-M88 Manually Operated Shut-Or VaZves for Gas Piping Systems (Reaffirmed 2003) THE CANADIAN GAS ASSOCIATION The Canadian Gas Association, which represents all segments of the natural gas industry, has been accredited by the Standards Council of Canada to prepare National Standards of Canada i

2、n the area of equipment for use with natural gas and propane. CGA, founded in 1907, represents distributors, transmission companies, producers, pipeline contractors, manufacturers, and allied service organizations. CGA set up a standards writing, inspection, and certification programme in the mid- 1

3、950s at a time when natural gas service was being extended to Eastern Canada and the West Coast. The standards programme now embraces 90 standards for gas appliances and accessories. Committees that write the standards include representation from all interests and are so constituted that no one inte

4、rest may dominate. The interests represented include consumers, manufacturers, utilities, governmental inspection authorities, and certification organizations. Standards are prepared using the consensus principle with effort applied to reconcile differing opinions. Government inspection authorities

5、having jurisdiction also ballot on the standards as members of the Interprovincial Gas Advisory Council (IGAC). The CGA Standards Advisory Committee (SAC) reviews committee structures and procedures to determine that a standard meets the criteria of the Standards Council of Canada. This Standard has

6、 been accepted by the Standards Committee, IGAC and SAC. This Standard is intended to be used within the scope of the standard by the manufacturing sector, by those applying the equipment, or those responsible for its proper application. It is the responsibility of the user to determine in each case

7、 that the Standard is suitable for the specific application. The Standards Committee and IGAC normally stipulate an effective date for the Standard, delayed sufficiently to permit suppliers to make adjustments. CGA Approvals, incorporated 1993, operates a certification programme for fuel-fired produ

8、cts which is accepted by all Canadian inspection authorities and accredited by the Standards Council of Canada. In addition, through the Canadian Gas Research Institute (CGRI), the gas industry is pursuing the improvement of equipment and the development of new products. Data from these projects is

9、available to Standards Committees for review and consideration. Recommendations for new standards and revisions to existing standards may come from any source. These suggestions should be addressed to the Standards Department of CSA International. PREFACE This Standard, like all standards prepared b

10、y the Canadian Gas Association, is subject to periodic review. Amendments in the form of replacement pages may be issued from time to time. To receive copies of these replacement pages, purchasers of this Standard should complete and return the attached card. Standards are updated in conjunction wit

11、h changes in technology and are normally reviewed at least within a five year period. If the Standards Committee, industry and provincial inspection authorities feel the standard requires no change, then the standard may be reaffirmed and only the date is changed - It should be noted that most CGA s

12、tandards are published as National Standards of Canada. As the standards conform to the criteria and procedures established by the Standards Council of Canada, the Standard Number designation changes with the CGA prefix being replaced by CAN7 or CAN/CGA - Although any replacement pages that have bee

13、n issued will be sold with the Standard, the purchaser must insert them where they apply. Replacement pages will show the date of the publication of the amendment. The effective date of the changes will be shown on the cover page of the amendment and is usually one year after publication. It is the

14、responsibility of the purchaser to maintain his copy of the Standard and to retain those pages which have been replaced for reference purposes. CAN/CGA-9.2-M88 Standard Name Organization Address City Prov/State Country Postal/Zip Code CSA INTERNATIONAL BUREAU CENTRAL DE LINFORMATION 178 BOUL REXDALE

15、 TORONTO ON M9W 1 R3 CANADA Aff ra nc h i r suff isamment Place Stamp Here CSA INTERNATIONAL CONSOLIDATED MAILING LIST 178 REXDALE BLVD TORONTO ON M9W 1 R3 CANADA CGA STANDARD CGA 9.2-M88 MANUALLY OPERATED SHUT-OFF VALVES FOR GAS PIPING SYSTEMS Effective Date - March 1989 This Standard is a revised

16、edition of the former CGA 9.2-1972 Prepared by CANADIAN GAS ASSOCIATION Published March, 1988 Copyright 0 Canadian Gas Association - 1988 NOTE Please note that this Canadian Gas Association Standard was originally published by CGA as a National Standard of Canada under the designation %AN/CGA-9.2-M8

17、8“. Since it was not available in French, the Standards Council of Canada asked that it be withdrawn as a National Standard of Canada. it is now published as a Canadian Gas Association Standard under the designation: “CGA 9.2-M88“. All references made herein to Standard “CAlVCGA-9.2- M88“ and any ap

18、plicable Arnendment(s) should be replaced with CGA 9.2-M88“. The content of this CGA Standard and any applicable Amendment(s) is identical to that of reference “CAN/CGA-9.2- M88. April, 1994 March 1988 CAN/CGA-9.2-M88 i TABLE OF CONTENTS Page Interprovincial Gas Advisory Council Standards Committee

19、Members . iii V -. 1. 1.1 SCOPE 1 1 GENERAL . 2. 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 SPRING LOADED TYPE VALVES CONSTRUCTION GENERAL DIMENSIONS COMPENSATION FOR WEAR VALVE STEMS AND HANDLES . STOPS MATERIALS . . . ASSEMBLY . . MARKING . . . . . . 3. 3.7 3.2 3.3 3.4 3.6 3.7 I 3.5 SPRING LOADED TYPE VALVES

20、 PERFORMANCE GENERAL . . LEAKAGE . . CAPACITY CONTINUED OPERATION LOW TEMPERATURE OPERATION STRENGTH . MATERIALS . . 4 4 4 4 5 6 6 7 9 9 9 9 9 9 9 9 10 10 10 10 10 10 10 11 , 4. 4.1 4.2 4.3 4.4 4.5 4.6 4.7 SOLID BOTTOM TYPE VALVES CONSTRUCTION GENERAL . DIMENSIONS . VALVE STEMS AND HANDLES . STOPS .

21、 MATERIALS . ASSEMBLY . MARKING . . . . . . . +. VALVES PERFORMANCE 5. 5.1 5.2 5.3 5.4 5.5 5.6 5.7 SOLID BOTTOM TYPE GENERAL . LEAKAGE . . CAPACITY CONTINUED OPERATION . . , . LOW TEMPERATURE OPERATION . STRENGTH . MATERIALS . . - . I 6- DEFINITIONS 12 TABLES TABLE I TABLE I1 TABLE I11 TABLE IV MINI

22、MUM DIMENSIONS FOR GAS SHUT-OFF VALVES . 13 MINIMUM DISTANCE FROM INLET TO ANY SHOULDER AT END OF THREAD 14 MINIMUM CAPACITIES FOR VALVES 14 TORQUE LIMITS AND NUMBER OF CYCLES FOR CONTINUED OPERATION 15 March 1988 CAN/CGA-9.2-M88 ii Paqe TABLE V TORQUE LIMITS AND NUMBER OF CYCLES FOR LOW TEMPERATURE

23、 VALVES 15 TABLE VI IMPACT . 16 TABLE vrI STATIC LOAD . 16 TABLE VI11 TURNING EFFORT . 17 TABLE IX SOLID BOTTOM TYPE GAS SHUT-OFF VALVES 17 FIGURES FIGURE 1 EXPLANATORY DIAGRAM OF TERMS USED IN TEXT 18 FIGURE 2 ACCEPTABLE DIMENSIONS FOR SPECIAL THREADS AND WORKING GAUGES FOR THEIR MEASUREMENT 19 FIG

24、URE 3 PENDULUM TYPE IMPACT MACHINE USED FOR TESTING GAS VALVES 20 Where a change or addition has been made to the previous edition of the Standard and amendments thereto, the Clause affected is identified by a vertical line in the margin. March 1988 CAN/CGA-9.2-M88 iii INTERPROVINCIAL GAS ADVISORY C

25、OUNCIL (As of December 1987) V.H. PERRY (Chairman) Chief Gas Inspector Office of the Fire Marshal Department of Labour P.O. Box 697 HALIFAX, Nova Scotia 835 2T8 (Alternate: D.C. STEWART) M.G. CHERRY Director, Gas Safety Branch Ministry of Municipul Affairs 601 West Broadway VANCOUVER, British Columb

26、ia V5Z 4G9 (Alternate: J.G. TURNBULL) R. CLENDINING Ministry of Consumer and Commercial Relations Ontario Fuels Safety Branch Technical Standards Division Shipp Centre, 3300 Bloor St. West 4th Floor, West Tower TORONTO, Ontario M8X 2x4 (Alternate: A. GOOCH) A.W. DIAMOND Director, Engineering & Techn

27、ical Services Division Department of Labour Newfoundland & Labrador Confederation Building ST. JOHNS, Newfoundland A1C 5T7 (Alternate: H.W. ASH) K. FENNING Acting Director Plumbing & Gas Safety Services Branch Department of Labour I.B.M. Bldg., 8th Floor 10808-99th Avenue EDMONTON, Alberta T5K OG5 J

28、. FOWLES Chief Boiler & Pressure Vessel Inspection Technical Inspection Branch N.B. Department of Labour FREDERICTON, New Brunswick E35 5H1 P.O. BOX 6000 (Alternate: D.E. ROSS) R.H. JACKSON Govt of the Yukon Territory Department of Municipal & Community Affairs P.O. Box 2703 WHITEHORSE, Yukon Territ

29、ory Y1A 2C6 R. KENNEDY Fire Marshal Department of Municipal Affairs 3 Queen Street P.O. Box 2000 CHARLOTTETOWN, Prince Edward Island CIA 7M8 W. MAULT Director Mechanical & Engineering Branch Manitoba Labour 500 Norquay Building WINNIPEG, Manitoba R3C OV8 R. McRAE Chief Gas Inspector Mechanical Secti

30、on, Safety Division Department of Justice & Public Services Govt of the Northwest Territories P.O. Box 1320 YELLOWKNIFE, Northwest Territories XOE IHO W. MITCHELL Senior Fire Protection Engineer, Standards Fire Prevention Branch, Labour Canada Phase 2, Place du Portage OTTAWA, Ontario K1A 052 March

31、1988 CAN/CGA-9.2-M88 iv J. SAMSON Chief, Gas Division Ministere de Travail, Division du Gaz 255 est. boul. Cremazie Est. MONTREAL, Quebec H2M 115 R. THERENS Acting Chief Gas Inspector Public Safety Services, Gas Safety Unit Saskatchewan Environment & Public Safety 1870 Albert St., 5th Floor REGINA,

32、Saskatchewan S4P 3v7 K. BALES (Council Secretary) Canadian Gas Association 55 Scarsdale Road DON MILLS, Ontario M3B 2R3 March 1988 CAN/CGA-9.2-M88 V CGA 9.1/9.2 STANDARDS COMMITTEE ON MANUALLY OPERATED SHUT-OFF VALVES (As of September 7986) LQFTUS, 6. (Chairman) Waltec Components 125 Mason Street WA

33、LLACEBURG, Ontario N8A 4L7 (Alternate: J. BRAZER BAXTER, D. (Vice Chairman) Consumers Gas Company P.O. Box 650 SCARBOROUGH, Ontario MIK 5E3 (Alternate: G. BARNIER) BALTZER, R. Union Gas Limited 50 Keil Drive North Chatham, Ontario N7M 5Ml (Alternate: K. THOMAS) cox, D. Harper-Wyman Company 2150 West

34、ern Court LISLE, Illinois 60532 (Alternate: G. GROSS) CHERRY, M.G. Director, Gas Safety Branch Ministry of Municipal Affairs 601 West Broadway VANCOUVER, B . C . V5Z 4G9 TAYLOR, B.N. Honeywell Limited 740 Ellesmere Road SCARBOROUGH, Ontario M1P 2V9 TOMS, J. Canadian Gas Association 55 Scarsdale Road

35、 Don Mills, Ontario M33 2R3 TURNBULL, G. E. Mueller Limited P.O. Box 3003 SARNIA, Ontario TYNE, T. Canadian Standards Association 178 Rexdale Blvd. REXDALE, Ontario M9W 1R3 LIEN, G. (Secretury) Standards Engineer Canadian Gas Association Approvals Division 55 Scarsdale Road Don Mills, Ontario M3B 2R

36、3 March 1988 CAN/CGA-9.2-M88 1 1. SCOPE GENERAL I I. 1.7.1 This standard applies to newly produced manually operated shut-off valves for gas piping systems and constructed of entirely new, unused parts and materials which: a. are intended for use downstream of the distributors meter or regulator, fo

37、r operation at a maximum pressure of 1/2 psig (3.4 kPa), b. are capable of operation at ambient temperatures between 32OF (OOC) and 125OF (52OC) and in addition are also capable of operation at a higher tern- perature, a lower temperature or both when so specified by the manufacturer. c. are valves

38、substantially of the plug and body, or rotating disc type, and valves of other types which will pro- vide equivalent performance. 1.1.2 Constructional provisions for spring loaded type manually operated gas shut-off valves are covered in Part 2 “Spring Loaded Type Valves-Construction.“ Performance p

39、rovisions for spring loaded type manually operated gas. shut-off valves are covered in Part 3 “Spring Loaded Type Valves-Performance. Constructional provisions for solid bottom type manually operated gas shut-off valves are covered in Part 4 “Solid Bottom Type Valves-Construction.“ Performance provi

40、sions for solid bottom type manually operated gas shut-off valves are covered in Part 5 “Solid Bottom Type Valves-Performance. 1.1.3 Room temperature, when specified in this standard, shall be considered at 77 2 10F (25 2 5.6OC). 1.1.4 This standard contains SI (Metric) equivalents to the yard/pound

41、 quantities, the purpose being to allow the standard to be used in SI (Metric) units. If a value for a measurement as given in this standard is followed by an equivalent value in other units, the first stated is to be regarded as the requirement. The given equivalent may be approximate. If a value f

42、or a mea- surement and an equivalent value in other units are both specified as a quoted mark- ing requirement, the first stated unit, or both units shall be provided, 2 CAN/CGA-9.2-M88 March 1988 2. SPRING LOADED TYPE VALVES CONSTRUCTION 2.1 GENERAL 2.7.1 Detailed drawings or blueprints of all basi

43、c models of valves shall be sup- plied by the manufacturer. 2.1.2 The construction of parts not covered by this standard shall be in ac- cordance with reasonable concepts of safety, substantiality, and durability. All specifications as to construction set forth herein may be satisfied by the con- st

44、ruction actually prescribed or such other construction OS will provide at least equivalent performance. General assembly shall be of a neat and workmanlike character with all parts well fitted. the thread. The threaded connection shall be in accordance with Figure 2 “Acceptable Dimensions for Specia

45、l Threads and Working Gauges for Their Measurement.“ Inspection to determine whether these threads meet this provision shall be made by using an American Standard taper pipe thread gauge of the proper respective size. 2.2.5 The threaded portion including any chamfer specified in clause 2.2.4, whethe

46、r male or female, shall fit the respective gauge within plus or minus 1 thread. Male threads of valves shall have no shoulder within the distance given in Table I1 (“Minimum Distance From Inlet to Any Shoul- der at End of Thread“) from the end of the threaded portion, including any chamfer. 2.3 COMP

47、ENSATION FOR WEAR 2.2 DIMENSIONS 2.2.1 The minimum dimensions of valves shall be in accordance with Table I (tfMini- mum Dimensions for Gas Shut-off Valvesf1). See Figure 1 “Explanatory Diagram of Terms Used in Text“ for an explanatory diagram of terms used. 2.2.2 The body of a plug type valve fin-

48、ished by lapping shall be bored out at the small end of the taper to a diameter of at least 0.003 inch (0.076 mm) larger than the small diameter of the plug taper for a distance equal to the take-up. 2.2.3 In a plug type valve, the largest diameter of the plug taper shall be at least 0.003 inch (0.0

49、76 mm) smaller than the large end of the body taper. The dia- meter of the portion of the valve plug ex- tending beyond the body taper shall be ot least 1/64 inch (0.40 mm) smaller than the large end of the plug taper. 2.2.4 A gas valve threaded for connection to a gas line or gas fitting shall have taper pipe threads conforming to the cur- rent Standard ANSI/ASME B1.20.2 PIPE THREADS, GENERAL PURPOSE (INCH) except that such threads shall have a chamfer at the beginning of the thread at 45 degrees (0.79 rad) to the axis of the threaded portion for a depth at least equal to t