Chengdu Zhiyuan Machine Science &Technology Co.,Ltd is Extra high pressure flange producer, we have many years experience in designing and manufacture high pressure flange, got the certificate of ISO9001,ASME, ANSI, API, etc. our products can be used in working condition upto 50Mpa, 500C.
our products is totally difference with tranditional flange, is same as Grayloc, but we have our own patent license:zl200720079783.2,no lawsuit against another company in patent.
our products has good reference in petrol, oil refineray,chemical, shipping building and etc.