This standard specifies the types, dimensions, technical requirements and designations of PN-designated and Class-designated hubbed slip-on-welding steel pipe flanges.
This standard is applicable to hubbed slip-on-welding steel pipe flanges with a nominal pressure of PN 6~PN 100 and Class 150~Class 1500.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 9112 Types and Parameters for Steel Pipe Flanges
GB/T 9124 Specification for Steel Pipe Flanges
3 Types and Dimensions
3.1 Types and dimensions of PN-designated hubbed slip-on-welding steel pipe flanges
3.1.1 The sealing face type as well as the applicable nominal pressure and nominal dimension of PN-designated hubbed slip-on-welding steel pipe flanges shall be in accordance with those specified in Table 1.
