Alloy Steel Seamless Pipes/Tubes: 1.A333GR6,GR3,GR1,18Cr2Mo,15Mo3,TP446- ... ,T11,WB36. 2. EN10216-2 Carbon Steel Seamless Pipes/Tubes: 1.API 5CT 2.API 5L 3.ASTM A53 ,A106, A179,A192,A199, ... 5. BS 970,3059 Carbon Steel Welded Pipes/Tubes: 1. API 5CT 2. API 5L 3. ASTM A135,A53,A252,A500 4. ... JIS G3444,G3445,G3452,G3454,C8305,C3466 Stainless steel welded Pipes/Tubes: 1. ASTM A312, A358, A778 / ANSI B36.19 ...