This standard specifies the materials, dimensional tolerance, test and inspection methods and other technical requirements of cast iron pipe flanges and it is applicable the cast iron pipe flanges specified in GB / T 17241.2~17241.6.
2 Normative References
The provisions involved in the following standards will become the provisions of this standard by quoting in this standard. When published, all the shown versions are valid. All the standards will be modified, and all parties using this standard shall discuss the possibility of using the latest version.
GB/T 17241.7-1998 The following standards are cited：
