1.Standard:BS,JIS,GB,ASME,ANSI,DIN 2.Grade:API J55,API K55,API L80,API P110 3. ... OD: 4-1/2''---20'' Standard: BS,JIS,GB,ASME,ANSI,DINGrade:API J55 ... ,API K55,API L80,API P110Out Diameter:4-1/2''---20'' FOB Price/MT:USD680--1,380.00MOQ:10MT Surface: Annealed/Pickled ...