JB/T 2776-1992 PN16.0～32.0MPa lens pad

This standard specifies the type, size, and technical requirements of lens gaskets for flange-connected angle high-pressure valves. This standard applies to lens gaskets with nominal pressure pN16.0~32.0MPa and nominal diameter DN3~200mm. The operating temperature is -30~200℃. JB/T 2776-1992 PN16.0～32.0MPa lens gasket JB/T2776-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
PN16.0～32.0MPa Lens Gasket
Subject Content and Scope of Application
This standard specifies the types, sizes, and technical requirements of lens gaskets for flange-connected angle high-pressure valves. JB/T 2776--92
Replaces JB277679
This standard applies to lens gaskets with nominal pressure PN16.0~32.0MPa and nominal diameter IDN3~~200mm. Use temperature 200℃.
2 Reference standards
GB6991
Technical conditions for high-quality carbon structural steel
GB1220 Stainless steel bars
GB3620 Titanium and titanium alloy grades and chemical compositionsJB/T450PN16.0~32.0MPa Technical conditions for forged angle high-pressure valves, fittings and fasteners3 Structural types and dimensions
The structural types and dimensions of the lens pads shall be as specified in Figure 1 and Table 1. Others
Marking example
Lens pad with outer diameter of 50mm and inner diameter of 39mm: Lens pad
50X39JB/T2776
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 20, 1992-30~
Implemented on January 1, 1993
Nominal pressure
Nominal diameter
4 Technical requirements
The material of the lens pad can be selected according to Table 2.
JB/T277692
158±0. 5
52.5±0.3
320±0,6
The lens pad material should be heat treated after heat processing. The hardness after heat treatment shall be in accordance with the provisions of Table 31:4
Inspection rules
ICr18Ni9'Ii
ICr18Ni12Mo2Ti
OCr17Mn13Mo2N
00Cr17Ni14M02
TA3,TC4www.bzxz.net
ICr18Ni9Ti
ICr18Ni12Mo2Ti
0Cr17Mn13Mo2N
00Cr17Ni14M02
TA3,TC4
JB/T 2776-- 92
The technical requirements and inspection rules of lens pads shall comply with the provisions of JB/T450. Additional remarks:
This standard is proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard is 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. Standard
GB1220
GB3620
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