This Standard specifies the types, dimensions and technical requirements of PN-designated and Class-designated integral steel pipe flanges.
This Standard is applicable to integral steel pipe flanges with a nominal pressure of PN 2.5~PN 400 and Class 150~Class 2500.
2 Normative References
The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. For dated references, subsequent amendments to (excluding corrigendum), 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 editions of these documents apply. For undated references, the latest editions apply.
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 Integral Steel Pipe Flanges
3.1.1 The sealing face type as well as the applicable nominal pressure and nominal dimension ranges of PN-designated integral steel pipe flanges shall be in accordance with those specified in Table 1.
Table 1 Sealing Face Type as well as Applicable Nominal Pressure and Nominal Dimension Ranges of PN-designated Integral Steel Pipe Flanges
