... ,API K55,API L80,API P110 3.Out Dia casing and tubingStandard: BS,JIS,GB,ASME,ANSI,DINGrade:API J55,API ... testing/impact inspection/hardness tester and so on.Production capacity: 300,000 metric tons per year.Marking:specification,HS code,origin,or ... TOPENSEA... Supplying the best... with the best Supply API casing and tubing