This part of GB/T 17241 specifies the types and dimensions of the integral gray cast iron, malleable cast iron and ductile cast iron flanges with the nominal pressure of PN2.5, PN6, PN10, PN16, PN25, PN40, Class150 and Class300.
This part is applicable to the design, manufacture and acceptance of DN10~DN4000 gray cast iron, malleable cast iron and ductile cast iron integral cast iron flanges.
2 Normative References
The following standards contain provisions which, through reference in this part of GB/T 17241, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies
GB/T 17241.7 Specifications for Cast Iron Pipe Flanges
