MS/GI Steel Pipes & ERW Hollow Sections (Square & Rectangle) In MS/GI Pipes and Hollow Sections we are providing products with the below mentioned International Standards: IS: 4923 - 1997 Square & Rectangular Hollow Sections for structural use. IS: 3601 - 2006 Carbon Steel Tues for Mechanical and General Engineering IS: 1239 - 2004 Steel Pipes for General uses in Water, Gas, Steam & Air IS: 1161 - 2014 Round Steel Pipes for Structural Purpose IS: 3589 - 2001 Steel Pipes for Water and Sewage IS: 9295 - 1983 Steel Tubes for Idlers for Belt conveyors We also provide pipes for use in Automotive and Ship Building. We can provide custom pipes as per clients requirement.