* Design and Manufacture GB12237-89 or API 6D or JPI7S-48

* Flange dimensions to JB79-59 or SH3406 or GB9113 or HG20592 or ANSI B 16. 5 or JIS B 2212-2214

* Face to face/End to end dimensions to GB12221-89 or ANSI B 16. 10 or JIS B2002

* Inspection and Test to GB/T13927-89 or JB/T9092-99 or API 598

Our products are used widely in power stations, drainage pipelines, etc..