... HG Material: Carbon, Stainless, Alloy Certificate: API, ISO9001: 2000, Production Capacity: 6000 tons per month Product Range: Seamless steel ... ,API5 CTMaterial20#,10#,45#,A53-A,A53-B,A106-A,A106-B,ST37,ST42,ST52SpecificationO.D.:13.7-610mmW. ... .Sample availabilityYES ( function(){ var aBigImageSrc = [ 'http://i00.i.aliimg.com/photo/v1/754996654_1/Round_Seamless_Pipe_ASTM_A106_53_Gr.jpg' , 'http://i00 ...