CNIS GB/T 9126.3-88 Asbestes rubber gaskets for steel pipe flanges with male and female face CNIS GB/T 9113.5-88 Integral steel pipe flanges with raised face for PN4.0 MPa(40 bar) CNIS GB/T 9117.4-88 Hubbed socket welding steel pipe flanges with raised face for PN 10.0MPa (100 b... CNIS GB/T 9123.22-88 Steel pipe blank flanges with male and female face for PN 15.0MPa (150 bar) CNIS GB/T 9123.21-88 Steel pipe blank flanges with male and female face for PN 10.0MPa (100 bar) CNIS GB/T 9123.18-88 Steel pipe blank flanges with male and female face for PN 2.5MPa (25 bar) CNIS GB/T 9115.30-88 Steel pipe welding neck flanges with tongue and groove face for PN 15.0MPa (150... CNIS GB/T 9113.10-88 Integral steel pipe flanges with male and female face for PN 2.5MPa (25 bar) CNIS GB/T 9116.9-88 Hubbed slip-on-welding steel pipe flanges with raised face for PN 5.0MPa (50 ba... CNIS GB/T 9115.10-88 Steel pipe welding neck flanges with raised face for PN 2.5MPa (25 bar) CNIS GB/T 9113.16-88 Integral steel pipe flanges with tongue and groove face for PN1.6MPa(16 bar) CNIS GB/T 9124-88 Butt-welding ends for steel pipe flanges CNIS GB/T 9115.1-88 Steel pipe welding neck flanges with flat face for PN 0.25MPa (2.5 bar) CNIS GB/T 9115.34-88 Steel pipe welding welding neck flanges with ring-joint face for PN 15.0MPa (15... CNIS GB/T 9121.6-88 Loose plate steel pipe flanges with weld-on collar with male and female face fo... CNIS GB/T 9131-88 Pressure-temperature ratings for steel pipe flanges CNIS GB/T 9116.8-88 Hubbed slip-on-welding steel pipe flanges with raised face for PN 2.0MPa (20 ba... CNIS GB/T 9130-88 Specification for metallic ring gasket for steel pipe flanges joint CNIS GB/T 9121.5-88 Loose plate steel pipe flanges with weld-on collar with male and female face fo... CNIS GB/T 9123.33-88 Steel pipe blank flanges with ring-joint face for PN 10.0MPa (100 bar) CNIS GB/T 9118.3-88 Loose hubbed steel pipe flanges with welding neck collar with ring-joint face f... CNIS GB/T 9129-88 Specification for asbestes rubber gasket for steel pipe flanges CNIS GB/T 9113.17-88 Integral steel pipe flanges with tongue and groove face for PN 2.5 MPa (25 bar) CNIS GB/T 9115.7-88 Steel pipe welding neck flanges with raised face for PN 0.6MPa (6 bar)