Alloy Steel Seamless Pipes/Tubes: 1.A333GR6,GR3,GR1,18Cr2Mo,15Mo3,TP446-2,TP409,TP410,A335P1,P11,P22,P5,P9,P91,T5,T22,T11,WB36. 2. EN10216-2 Carbon Steel Seamless Pipes/Tubes: 1.API 5CT 2.API 5L 3.ASTM A53 ,A106, A179,A192,A199,A210,A213,A333,A334,A556 4.DIN 17175,1629,2391,2440,2393 5. BS 970,3059 Carbon Steel Welded Pipes/Tubes: 1. API 5CT 2. API 5L 3. ASTM A135,A53,A252,A500 4. DIN 2440 5. BS ...