This standard specifies the type, size, and technical requirements of external threaded connection joints for forged high-pressure valves. This standard applies to joints with nominal pressure pN16.0~32.0MPa and nominal diameter DN3~200mm. JB/T 2771-1992 PN16.0~32.0MPa joints JB/T2771-1992 Standard download decompression password: www.bzxz.net
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Mechanical Industry Standard of the People's Republic of China PN16.0~~32.0MPa Joint Subject Content and Scope of Application This standard specifies the type, size, technical requirements, etc. of external threaded joints for forged high-pressure valves. JB/T 2771 *92 Replaces JB277170 This standard applies to joints with nominal pressure PN16.0~32.0MPa and nominal diameter IN3~25mm 2 Reference Standards GB699 Technical Conditions for High-quality Carbon Structural Steel GB1220 Stainless Steel Bars JIB/T450 Technical Conditions for PN16.0~~32.0MPa Forged Angle High-pressure Valves, Pipe Fittings, Fasteners Structural Type and Size The type and size of the joint shall be as specified in Figure 1 and Table 1. R0.5 Marking example Connector with inner diameter of 6mm: Connector 6JB/T2771 Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1992-07-20The rest 199301-01Implementation Nominal pressure 25.0,32.0 Nominal diameter DN Technical requirements The materials of the connector shall comply with the provisions of Table 2. www.bzxz.net ICrl8Ni12Mo2Ti JB/T 2771--92 The mechanical properties of the connector after heat treatment shall comply with the provisions of Table 3. 4.2 1Cr18Ni12Mo2Ti Inspection rules The magnetic particle inspection and other technical conditions of the connector shall comply with the provisions of JB/T450. Additional Notes: This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Huang Mingya and Wang Xiaojun. 100 Standard No. GB 699 GB1220 N·m/cm\ 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.