1.seamless steel pipe ,Boiler pipe 2.OD:20mm--820mm, 1/2"--32" 3.Steel Grade:20,20G,A179,A106 B,A192,Gr320 4.MOQ:1 Ton Brand name :WanjiWebsite:www.wjpipe.comBusiness type:Manufacture and exporterproduct NameBoiler seamless steel pipeSpecification Range20mm-820mm 1/2"- 32"Steel Grade20,20G,A 179,A106 B,A192,st37.0,st44.0,ST35.8,ST45.8,Gr320Executive StandardGB3087-1999,GB5310-1995,ASTM A106,ASTM ...