... 21.3-457mm 3)Application:Structure Pipe 4)Certification:ISO9001:2000 ASTM A106-A seamless steel pipeStandardAPI 5CT, 5L; ASTM, BS, ... stripsDeliveryBy containerThird party inspectionSGS/BVCertificatesAPI 5CT-0865, 5L-0593, ISO9001:2000Production CapacityThree mills with full production capacity, 100,000tons ... ZhaoTel0086-513-88776666,88778899,88775599Fax0086-513-88775566 ASTM A106-A seamless steel pipe