The AST YST 240 Heavy Duty 15 NB MS Round Pipe - (3.2 x 21 mm) - 6 mtr Length from AST PIPES is a precision ERW mild steel round pipe in YST 240 structural steel, compliant with IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings). Featuring a 21 mm OD × 3.2 mm wall (15 NB) profile in 6 m standard cut lengths, this Heavy Duty pipe is engineered for high-pressure fluid service and heavy structural loading conditions, with consistent wall distribution and a smooth internal bore for efficient fluid and gas conveyance. Guaranteed minimum yield of 240 MPa and tensile of 360 MPa make it a dependable choice for industrial plumbing, gas lines, structural columns, and medium-duty fabrication works across residential, commercial, and industrial projects.

• Produced to IS 1239:2004 with certified mechanical properties for YST 240 — Heavy Duty class
• Precise 21 mm OD × 3.2 mm wall (15 NB): thicker wall construction delivering maximum pressure rating and superior mechanical strength
• Uniform wall thickness of 3.2 mm ensuring consistent hoop strength and pressure capacity
• ERW welding with continuous online seam quality monitoring during production process
• Standard 6 m cut lengths for minimal wastage and efficient site handling
• Low carbon content delivering superior ductility, impact resistance, and notch toughness
• Machinable — suitable for drilling, plasma/laser cutting, sawing, and threading operations
• Anti-corrosion oil-coating option available for transit and extended storage protection
• Consistent roundness and straightness within IS tolerances for easy erection and jointing
• Full traceability via heat number with mill test certificates (MTC) available on request

• Plumbing and sanitation systems in residential buildings, hospitals, and institutions
• Compressed air distribution lines in factories, workshops, and industrial facilities
• Structural tubular columns and bracing members in steel building frameworks
• Pre-Engineered Building (PEB) bracing, secondary members, and purlin sections
• Conveyor support structures, material-handling gantries, and elevated walkways
• Fencing posts, gate frames, bollards, and perimeter security infrastructure
• Automotive and vehicle body sub-frames, chassis tubes, and roll cage sections