U-tubes Standard:GB,ASTM/ASME,EN,JIS,DIN Advantage:high quality,reasonable price OD:12.7-38.1MM WT:0.5-3.175MM Type: U-tubesGrade:304,304L,321,316,316L,316Ti,347H,310SSpecification:OD:12.7-38.1MM WT:0.5-3.175MM Max Length:24meterStanards:GB13296-2007 ASTM A213/ASME SA213 ASTM A688/ASME SA688Surface finishing: annealed/pickledProcess method:cold rolled/cold drawnpackage: in bundles or seaworthy ...