GB/T 15530.4-2008
Copper alloy hubbed slip-on flanges for brazing or welding
HG/T 21530-2014
Slip on flange handholes
HG/T 21517-2014
Slip on flange manholes with hinged cover
HG/T 21523-2014
Slip on flange manholes with davit to horizontal cover
HG/T 21520-2014
Slip on flange manholes with davit to vertical cover
GB/T 9116-2010
Hubbed slip-on-welding steel pipe flanges
GB/T 15530.4-1995
Copper alloy hubbed slip-on flanges for brazing or welding
GB/T 17241.4-1998
Hubbed slip-on-welding and hubbed socket welding cast iron pipe flanges
HG/T 21530-2005
HG/T 21517-2005
HG/T 21523-2005
HG/T 21520-2005
GB/T 9116.3-2000
Hubbed slip-on-welding steel pipe flanges with tongue and groove face
GB/T 9116.1-2000
Hubbed slip-on-welding steel pipe flanges with flat face or raised face
GB/T 9116.2-2000
Hubbed slip-on-welding steel pipe flanges with male and female face
GB/T 9116.4-2000
Hubbed slip-on-welding steel pipe flanges with ring-joint face