Sourced from AST PIPES's certified ERW pipe manufacturing facility, the AST YST 310 Medium Duty 100 NB MS Round Pipe - (4.5 x 113.1 mm) - 6 mtr Length is a Medium Duty round pipe in YST 310 steel built to IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings). The 113.1 mm outside diameter × 4.5 mm wall (100 NB) in 6 m cut lengths provides designed for medium-pressure fluid conveyance and standard structural applications with a guaranteed tensile of 450 MPa and balanced wall thickness providing reliable performance under moderate pressure and structural loads throughout. Consistent roundness, flush weld seam, and tight dimensional tolerances ensure seamless integration with IS-standard fittings, flanges, end caps, and threaded couplings across all installation types.

• IS 1239:2004 Medium Duty pipe in YST 310 — IS-marked for certified structural and hydraulic assurance
• Section: 113.1 mm OD × 4.5 mm wall | 100 NB — balanced wall thickness providing reliable performance under moderate pressure and structural loads
• Manufactured via ERW process for consistent, strong, and flush weld seam integrity
• Yield strength 310 MPa enables efficient sizing for reduced steel tonnage and cost
• Standard 6 m lengths ready for immediate workshop fabrication or site deployment
• Excellent formability — cold-bending possible to standard radii without cracking or wrinkling
• Circular cross-section delivers equal hoop strength and uniform bending resistance in all directions
• Compatible with flanged, screwed, grooved, and welded connection systems throughout
• Passes hydrostatic test requirements as per IS 1239:2004 duty-class norms where specified
• Clearly bundled and labelled by grade, duty, and size for easy site identification

• High-pressure water and process fluid transmission lines in industrial plants
• Piling and ground anchoring works in civil and infrastructure foundation engineering
• Heavy structural columns, struts, and compression members in high-load buildings
• Crane runway structures, gantry columns, and jib crane mast installations
• Shipbuilding and marine structural tubulars for above-waterline applications
• Mining equipment frames, conveyor gantry columns, and ore-handling structures
• Electrical and telecommunications conduit protection for underground utilities