Time for the third kind of closing well is so long that flangesteel ring groove on the top of casing-head is heavily corroded in M4 well being situated in Tarim basin.
位于塔里木盆地的M4井，由于三类封井时间较长，造成套管头上部法兰钢圈槽严重腐蚀。
2
Our company is mainly manufacturing to seal and seal of stainless steel pump, valve, flange etc supporting seals the specialized enterprise.
本公司是一家主要生产进行密封及不锈钢泵、阀、法兰等配套密封件的专业企业。
3
According to the stress check criteria of the integral flange stipulated in GB150-1998 steel pressure vessels, optimum design of the integral flange is made by Lagrangian method.