Carbon Sted ERW Pipes & Tubes : as per ASI 239 iS Light / Medium / Heavy duty & IS 3589 Fe 330/410 IS 1161 Carbon Steel ERW & Seamless Heat Exchanger Tubes : as per BS 3059 Part I Gr. 320, BS 3059 Part II Gr.360, 440 & 620 with IBR Test Certificate. MS ERW & Hot Dipped Galvanised (GI.) ERW Pipes as per IS 1239 & IS 3589 Gr. Fe 330 & 410. SAW / EFW Pipes : as per ASTM A 53 Gr. B, API 51, Gr. B & ASTM A 671, 672 & 692 in all Class with IBR Test Certificate.