AST PIPES's AST YST 310 Heavy Duty 100 NB MS Round Pipe - (5.4 x 113.1 mm) - 6 mtr Length is a high-quality Heavy Duty ERW mild steel round pipe in YST 310 structural steel produced to IS 1239:2004 (Mild Steel Tubes, Tubulars, and Other Wrought Steel Fittings). The 113.1 mm OD × 5.4 mm wall (100 NB) profile in 6 m lengths is engineered for high-pressure fluid service and heavy structural loading conditions, with excellent weldability, consistent threading properties, and thicker wall construction delivering maximum pressure rating and superior mechanical strength — critical for high-pressure pipelines, heavy structural columns, and critical engineering installations. Processed from prime HR coil through precision ERW welding and sizing, each pipe delivers assured dimensional accuracy, certified mechanical properties, and reliable long-term service performance.

• Produced to IS 1239:2004 with certified mechanical properties for YST 310 — Heavy Duty class
• Precise 113.1 mm OD × 5.4 mm wall (100 NB): thicker wall construction delivering maximum pressure rating and superior mechanical strength
• Uniform wall thickness of 5.4 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