This standard specifies the type and size of socket welding steel pipe flanges with tongue and groove surface and neck socket welding with nominal pressure PN of 5.0, 11.0, 15.0 and 26.0 MPa. This standard is applicable to socket welded steel pipe flanges with tongue and groove surface and neck with nominal pressure PN5.0~PN26.0MPa.
2000GB/T 9117.3-2000 Hubbed socket welding steel pipe flanges with tongue and groove face
GB/T 9117.3-2000 Hubbed socket welding steel pipe flanges with tongue and groove face was changed to GB/T 9117-2010 Hubbed socket welding steel pipe flanges.