This standard specifies the types and dimensions of copper alloy flat welding ring loose sleeve plate steel flanges with nominal pressure PN of 2.5 and 4.0 MPa. This standard applies to copper alloy flat welding ring loose sleeve plate steel flanges with nominal pressure PN of 2.5 and 4.0 MPa and nominal diameter DN10~500mm. GB/T 15530.5-1995 Copper alloy flat welding ring loose sleeve plate steel flange GB/T15530.5-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Copper alloy flat welding ring loose plate steel flange
Loose plate steel flanges with copper alloy plate collar for brazing or welding Subject content and scope of application
GB/T 15530.5 -1995
This standard specifies the types and dimensions of copper alloy flat welding ring loose plate steel flanges with nominal pressure PN of 2.5 and 4.0MPa. This standard is applicable to copper alloy flat welding ring loose plate steel flanges with nominal pressure PN2.5 and 4.0MPa and nominal diameter DN10~500mm.
2 Reference Standards
GB/T15530.8 Technical Conditions for Copper Alloy and Composite Flanges 3 The types and dimensions of flanges shall comply with the provisions of the following figure and Tables 1 and 2. The technical requirements of copper alloy
flanges shall comply with the provisions of GB/T15530.8. 4
The nominal pressure of the flange and the maximum non-impact working pressure at different temperatures shall comply with the provisions of Appendix A of GB/T15530.8. 5
6 Marking example
Nominal diameter 300mm, nominal pressure 2.5MPa (25bar) copper alloy flat welding ring loose sleeve plate steel flange: Flange 300-25GB/T15530.5
Approved by the State Administration of Technical Supervision on April 2, 1995, implemented on January 1, 1996
Nominal diameter outer diameter
15, 16
18, 20
22, 25
28, 30||t t||35, 38
42, 44.5
54, 57
GB/T15530.5—1995
Table 1PN2.5MPa copper alloy flat welding ring loose sleeve plate steel flange size connection size
flange outer diameter
bolt hole center circle
bolt hole diameter
flange thickness flange inner diameter
number of threads
PN4.0MPa copper alloy flat welding ring loose sleeve plate steel flange size table 2| |tt||Connection size
Nominal diameterPipe outer diameter
Flange outer diameter
15, 16
18, 20
22, 25
28, 30
35, 38
42, 44.5
54, 57
Center circle of bolt hole
Diameter of bolt hole
Flange thicknessFlange inner diameter
QuantityThread
Flat welding ring
15.0 7,16.07
18.07, 20.08
22.08, 25.08
28.08.30.08
35.09,38.08
42.09.44 .60
54.09,57.23
Flat welding ring
15.07, 16.07
18.07.20.08
22.08.25.08
28. 08.30. 08
35.09.38.08
42.09、44.60
54.09.57.23
GB/T 15530.5—1995bzxZ.net
Continued Table 2
Connection size
Nominal diameterOuter diameter of pipe
Center circle of bolt hole
Outer diameter of flange
Additional remarks:
Diameter of bolt hole
Number of threads
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. Flange thickness Flange inner diameter
This standard is under the jurisdiction of the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Li Junying.
Flat welding ring
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