Seamless implementation of the standard material: api 5l/5ct gr.B astm a106/a53 gr.B st35.8 st42 st45 st52 st52.4 20 # 45 # q345b x42-x65. Specifications: 1 / 2 "-36" * sch10-xxs. Our factory has api 5l/5ct iso9001 seamless lloyd's certification, in straight seam, spiral pipe plant for sale at all have api qualification Certication:iso 9001:2000 api 5l Standard:astm, api, din, en, bs, ect. Specification: od(outside diameter):12.7mm-711mm Wt(wall thickness):2.5mm-50mm Material:low carbon steel(moq 100ton), medium carbon steel, high carbon steel Qulity goods in stock :astm a106 gr.B, astm a53 gr.B, api 5l gr.B