IS 1239LIGHT, MEDIUM & HEAVY “A” CLASS, “B” CLASS & “C” CLASS MS CARBON TUBE ASTAM106GRB ASTM53 IN ALL SERIES BOILER QUALITY TUBES-BS 3059 PART 1&II IBR & NON-IBR. ALSO, HYDERAULIC TUBES, CASTING PIPES ETC. AVAILABLE IN SIZE of 3 MM TO 650 MM. WE ARE ALSO MANUFACTURING MS RECTANGULAR PIPES AS PER THE CUSTOMER’S SPECIFICATION & DRAWING.