Marking example: National Standard of the People's Republic of China Bulkhead uniform elbow body Bulkhead uniform elbow-Body Nominal pressure level J, pipe outer diameter D is 11m ferrule bulkhead right angle joint body joint body J14GB3749.2-83 National Bureau of Standards 1983-06-17 issued UDC 621.643.4 GB 3749-2-83 198404·01 implementation Nominal Bull M10×1 M12×1.25 M20×1.5 M27 ×1.5 M30×2 M33×2 M36×2 M45×2 M48×2 M52×2 M30×2www.bzxz.net M33×2 M36×2 M39×2 GB 8749+2--88 Note: weight is calculated value, specific gravity is .5kg/dm3. Technical conditions shall comply with GB3765-83. Limit GB 8749.2--83 (kg/100 pieces) Additional remarks GB 8749.2-11 This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Standardization Institute of the Ministry of Machinery Industry. This standard was drafted at the expense of the Standardization Institute of the Ministry of Machinery Industry, and was drafted by Shenyang Heavy Machinery Plant, Chongqing Heavy Automobile Research Institute, Dalian Modular Machine Tool Research Institute, Zhejiang Haiyi County Pipe Fittings Factory, Shanghai No. 1 Mechanical and Electrical Bureau Science and Technology Information Institute, and the 70th Institute of the Ministry of Aerospace. The main drafters of this standard are Hu Zengsheng, Liu Dequan, Cheng Shi, and Wang Su. From the date of implementation of this standard, the original ministry standard B193-7 "Cut-type right-angle connector" will be invalidated. Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.