... , alloy steel pipe.. We are one of the biggest agent of Chengdu Steel Group Co., Ltd., Baotou ... A106GR.B,Q345B 4.Certification: API, SO9001,ISO9002 We supply various types of steel pipes as ASTM, API5L, ... API5CT, ANSI, EN, BS, DIN, JIS and GB standards to you. Type:API ... as your requirements.StandardASTM A53, ASTM A106, API 5L, DIN1626,JISG3452,JSSG3457MaterialGR.A GA.B X42 ...