... 80mm 3. Certificate: ISO,API 5L,API SPEC 5L. 4. Material: X42-X60 ST44 ST4 ... 80mm 3. Certificate: ISO,API 5L,API SPEC 5L. 4. Material: X42-X60 ST44 ... ST4carbon steel pipe price per ton specifications StandardAPI 5CT, 5L; ASTM, BS, JIS, DINSteel GradeAPI 5L ... containerThird party inspectionSGS/BVCertificatesAPI 5CT-0865, 5L-0593, ISO9001:2000Production CapacityThree mills with ...