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Pipe Carbon Steel/Stainless Steel Seamless Pipe Astm A106 Grade B Sch40 Sch80 Sch160 Standard: ASTM A106, API SPEC 5L.API SPEC 5CT,ASTM A53,ISO3183,EN10217,JIS G3452,EN10216 Material: 10,20,35,45,S235...