api standards pipe supply 1.Standard: BS,JIS,GB,ASME,ANSI,DIN 2.Grade:API J55,API ... K55,API L80,API P110 3.Out Dia api standards pipe supply Standard: BS,JIS,GB,ASME,ANSI,DINGrade:API J55,API ... /intergranular corrosion/universal tensile tester/spectrum analyzer/metallographic detector/roughness testing/impact inspection/hardness tester and so on.Production capacity: 300 ...