Precision-formed and IS-certified, the AST YST 240 Heavy Duty 100 NB MS Round Pipe - (5.4 x 113.1 mm) - 6 mtr Length from AST PIPES is a Heavy Duty ERW round pipe in YST 240 structural steel conforming to IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings). The 113.1 mm OD × 5.4 mm wall (100 NB) in 6 m lengths delivers the thicker wall construction delivering maximum pressure rating and superior mechanical strength demanded by medium-duty structural, industrial, and mechanical piping, with tight thickness tolerance, consistent roundness, and smooth internal bore for unrestricted fluid flow. With yield of 240 MPa and tensile of 360 MPa, this IS-marked pipe ensures safe and reliable performance in plumbing, structural, and mechanical service.

• Grade YST 240 steel: minimum yield strength 240 MPa, minimum tensile strength 360 MPa
• Heavy Duty classification per IS 1239:2004: engineered for high-pressure fluid service and heavy structural loading conditions
• Pipe dimensions: 113.1 mm OD × 5.4 mm wall (100 NB) — consistent throughout 6 m length
• Cold-formed ERW manufacturing ensuring high-integrity, flush weld seam quality throughout
• Conforms to IS 1239:2004 — IS-marked with full batch mill certification on every supply lot
• Smooth internal bore for efficient, low-friction fluid and gas conveyance under all conditions
• Excellent weldability — compatible with MIG, TIG, SMAW, and orbital welding processes
• Compatible with IS-standard threaded fittings, flanges, and couplings for 100 NB
• Square-cut ends for precise measurement and clean joint preparation on site
• Smooth mill-finish external surface suitable for painting, galvanising, or powder coating

• Water supply and distribution pipelines in residential, commercial, and industrial buildings
• Gas conveyance lines for domestic, commercial, and light industrial installations
• Structural columns, posts, and compression struts in construction and fabrication frameworks
• Fire-fighting water mains, wet riser systems, and automatic sprinkler pipework
• Agricultural irrigation networks, pump discharge lines, and water distribution mains
• Handrails, balustrades, safety guardrails, and pedestrian barrier systems
• Scaffolding standards, shoring props, and temporary support structures on site