ASTM A358 Steel Pipe – Electric-Fusion-Welded Austenitic Stainless Steel Pipe

Handa’s ASTM A358 Steel Pipes are premium-grade electric-fusion-welded austenitic stainless steel pipes designed to perform reliably under high-temperature and corrosive conditions. These pipes are commonly utilized in chemical processing, petroleum refining, and other industrial sectors where durability and integrity under pressure are essential.

ASTM A358 specifies various chromium-nickel stainless steel grades such as TP304, TP304L, TP316, and TP316L, all selected for their superior corrosion resistance and heat tolerance. The manufacturing process involves electric-fusion welding, ensuring high-quality welds with excellent mechanical properties and structural integrity.

The standard defines five class designations (Class 1 to Class 5), each with distinct welding and heat treatment requirements. Radiographic or ultrasonic testing is applied to certain classes to ensure weld soundness. Pipes can be supplied in different surface finishes including annealed pickled, bright annealed, or polished, and are available with plain, beveled, or threaded end connections.

These pipes offer high temperature strength, outstanding corrosion resistance, and excellent weld quality—making them well-suited for condensers, heat exchangers, reactors, and other components in demanding environments.

Specifications:

– Product Type: Electric-Fusion-Welded Austenitic Stainless Steel Pipe
– Specification: ASTM A358
– Material Grades: TP304, TP304L, TP316, TP316L, and others
– Class Designations:
 – Class 1: Double welded with filler metal, fully radiographed
 – Class 2: Double welded with filler metal, not radiographed
 – Class 3: Single welded with filler metal, fully radiographed
 – Class 4: Single welded, inside weld may be without filler metal, fully radiographed
 – Class 5: Double welded from double full-thickness plate, fully radiographed

– Manufacturing Method: Electric-Fusion Welding
– Size Range: Outer diameter and wall thickness as per specification
– End Connections: Plain End, Beveled End, Threaded End (as specified)
– Surface Finish:
 – Annealed Pickled
 – Bright Annealed
 – Polished

– Mechanical Properties:
 – Tensile Strength: Grade-dependent minimums
 – Elongation: Grade-dependent minimums
 – Hardness: Compliant with austenitic stainless steel standards

– Testing & Inspection:
 – Mechanical Testing (Tensile, Flattening, Hardness)
 – Radiographic or Ultrasonic Testing (as per class)
 – Visual Inspection for surface defects and dimensional accuracy

– Temperature Resistance: Excellent for high-temperature applications
– Corrosion Resistance: Superior corrosion resistance in aggressive environments
– Applications:
 – Chemical Processing Plants
 – Petroleum Refineries
 – Heat Exchangers & Condensers
 – Reactors & High-Pressure Pipelines
 – Industrial Equipment Handling Corrosive Fluids

– Compliance: Fully conforms to ASTM A358 specification

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