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1、JIS +- I UDC 621.646.2:621.642.036:662.766,6 JAPANESE INDUSTRIAL STANDARD Valves for Dissolved Acetylene Cy1 i nder JIS B 8 2 4 4 - 1 9 8 9 Translated and Published by Japanese Standards Association Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicen
2、see=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S B*h244 89 W Y933608 00212b4 9 In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright J
3、apanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,- UDC 621.646.2:621.642.036:662.766.6 JAPANESE INDUSTRIAL STANDARD J I
4、S Valves for Dissolved Acetylene Cylinder B 8244-1989 TY Pe Valve with safety device 1. Scope Symbol S This Japanese Industrial Standard specifies valves to be used mainly for dissolved acetylene cylinders specified in JIS B 8234, hereinafter referred to as the “valves. Remark: The units and numeric
5、al values given in based on the traditional unit system and are currently the criteria in force. in this Standard are 2. Classification The classification of the valve shall be as given in Table 1. Table 1 Valve without safety device O 3. Performance 3.1 Opening and Closing of Valve Opening and clos
6、ing operation of the valve shall be simple and smooth. 3.2 Pressure Resisting Characteristic The valve element shall be free from leakage or other defects when subjected to hydrostatic, pneumatic or inert gas pressure not less than 4.9 MPa 50 kgf/cmZ. 3.3 Airtightness The valve shall show no sign of
7、 leakage from any checked portion when subjected to the airtightness test specified in Table 2 using air or inert gas. Applicable Standards: JIS B 8234-Refillable Welded Steel Cylinders for Dissolved Acetylene JIS B 8246-Valves for High Pressure Gas Cylinder JIS G 3201-Carbon Steel Forgings for Gene
8、ral Use JIS G 4051-Carbon Steels for Machine Structural Use JIS H 3250-Copper and Copper Alloy-Rods and Bars Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or n
9、etworking permitted without license from IHS -,-,- J I S B*8244 89 W 4933b08 00212bb 2 W Testing pressure (MPa) kgf/cm2) 2 B 8244-1989 Testing time (s) Table 2. Conditions of Airtightness Test I Portion to be checked Method of test Valve element, valve outlet, safety device Valve element, gland nut
10、Close valve, apply pressure from valve inlet, then check. Plug valve outlet, or cap valve inlet. Apply pressure to valve from valve inlet or from valve outlet, then check while valve is being opened. 2.9 30) min. 30 min. 3.4 Operation of Safety Device The safety device shall start functioning at tem
11、peratures 105 t: 5C while a pressure of 3.9 MPa 40 kgf/cm2) is being applied. 3.5 Vibration Resistance The valve shall be free from leakage or other abnormalities when made to vibrate, while a pressure specified in Table 2 is being applied for 30 min each in three directions of upward and downward,
12、left and right and perpendicular to it 2000 times per minute with a full amplitude of 2 mm. 4. Dimensions and Construction 4.1 Valve Inlet The dimensions of valve inlet shall be as specified in Table 3. Table 3. Dimensions of Valve Inlet Valve outlet element Copyright Japanese Standards Association
13、Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,- . J I S B*244 89 W 4933608 002L267 4 Threaded part Basic Number of d c ds diameter i threads Taper
14、(approx. 1 da (aPProx.) (for each 25.4 mm) 40.3 36.969 39.000 17.60 29.0 12 3 26 - Table 3 (Continued) mi mz (approx. ) (approx. ) 4 2 3 B 8244-1989 Unit: mm 4.2 Valve Outlet The dimensions of valve outlet shall be as specified the following Fig. 1. Fig. 1. Dimensions of Valve Outlet Unit: mm 4.3 Va
15、lve Stem as specified in Fig. 2. The dimensions of the angular part of valve stem shall be Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitte
16、d without license from IHS -,-,- 4 B 8244-1989 Fig. 2. Dimensions of Angular Part of Valve Stem Unit: mm Remark: The dimension of the angular part of valve stem may be set for 10 mm until September 30, 1991. 4.4 Safety Device When the valve is to be equipped with a safety device, a fusible alloy com
17、plying with the requirement of 3.4 shall be used, and the diameter of discharge part shall be 4 mm or more, and the discharge angle shall be within 30“ upward from the axis of valve. 5. Appearance The valves shall be adequately finished and free from flaws, cracks, rust, burrs or other defects injur
18、ious to practical use. Further, foreign matters such as chips shall not be found. 6. Material The material used for the valve element shall be C 3771 in JIS H 3250, SF 40 in JIS G 3201, S 25 C in JIS G 4051 or those equivalent to them in quality. However, copper or copper alloy more than 62 % in cop
19、per content shall not be used for the valve element or part. 7. InsDection Inspection shall be made on performance, dimensions, construction, appearance and material, and the results shall comply with the requirements of 3. to 6. However, inspections of 3.2 and 3.5 shall be made when the valve is ne
20、wly designed and manufactured, when remodeled or modified, or as occasion needs. 8. Designation of Product The designation of valve shall be made by JIS number or title of Standard and the symbol of type of valve. Example: JIS B 8244 S or Valve for Dissolved Acetylene Cylinder S Copyright Japanese S
21、tandards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,- 5. B 8244-1989 9. Marking The valve shall be marked in suitable portions with
22、the following items: (1) Name or mark of manufacturer (2) Date of manufacture by month and year or its abbreviation (Example: 88-04) (3) Mass (kg) (Example: W 0.9) (4) Pressure of the pressure test (MPa) kgf/cm21 (Example: TP 50)* Note *: TP 50 means that the pressure of the pressure test is 50 kgf/
23、cm2. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,- B 8244-1989 Edition 1 Japanese Text Established by Mi
24、nister of International Trade and Industry Date of Establishment: 1964-03-01 Date of Revision: 1989-01-01 Date of Public Notice in Official Gazette: 1989-01-05 Investigated by: Japanese Industrial Standards Committee Divisional Council on General Machinery This English translation is published by: J
25、apanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan O JSA, 1989 lrinted i n Tokyo by Hohbunsha Co., Ltd. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 22:20:56 MSTNo reproduction or networking permitted without license from IHS -,-,-