... HG Material: Carbon, Stainless, Alloy Certificate: API, ISO9001: 2000, Production Capacity: 6000 tons per month Product Range: Seamless steel ... API SPEC 5L pipes, MATERIAL :ST 37, ASTM A106 Gr B; A53, A210; API 5L X42, X46, X52, X56, ... API5 CTMaterial20#,10#,45#,A53-A,A53-B,A106-A,A106-B,ST37,ST42,ST52SpecificationO.D.:13.7-610mmW ... aImgSrc': aBigImageSrc } ); } )(); Round Seamless Pipe(ASTM A106/53 Gr B)