... in Beijing,Qinhuangdao, and Wuhan.The product widely applied to shipbuilding industry, architecture industry, petroleum and hemistry industry, ... stable quality,reasonable prices and better service for customers to provide satisfactory products. Seamless steel pipe Seamless steel ... 5-12m,customized Standards:API 5L,API5CT,ASTM A106,ANSI,ISO9001,DIN,EN,JIS. 1. Specification: SM400A, SM400B, SM490A, SM490B ...