GB/T 17241.4-1998 in English

《GB/T 17241.4-1998带颈平焊和带颈承插焊铸铁管法兰》由TC237（全国管路附件标准化技术委员会）归口，主管部门为中国机械工业联合会。
本标准规定了公称压力PN为1.0、1.6、2.5及4.0MPa的带颈平焊和带颈承插焊球墨铸铁管法兰的型式和尺寸。

This standard specifies the types and dimensions of the hubbed slip-on-welding and hubbed socket welding ductile cast iron flanges whose nominal pressure PN is 1.0, 1.6, 2.0, 2.5 and 4.0MPa.

2 Normative References

The provisions of the following standard, through reference in this standard, constitute the provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and parties to agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
Specifications for Cast Iron Pipe Flanges (GB/T 17241.7-1998)

1 Scope
2 Normative References
3 Types and Dimensions
4 Technical Requirements
5 Marking Examples