Product Overview

ASTM A312 ERW Stainless Steel Pipes are widely used welded stainless steel pipes manufactured by the Electric Resistance Welding (ERW) process. This standard covers seamless, straight-seam welded, and heavily cold-worked austenitic stainless steel pipes intended for high-temperature and general corrosive service.

As a professional ERW stainless steel pipe supplier, Ganyeah Group produces ASTM A312 ERW pipes with precise dimensional control, excellent weld integrity, and stable mechanical properties. Our pipes are designed to meet the demanding requirements of chemical processing, oil & gas, water treatment, and industrial piping systems.

Manufacturing Process – ERW with Online Weld Inspection

Ganyeah ASTM A312 ERW stainless steel pipes are produced using advanced ERW technology:

Stainless steel strip is cold-formed into a tubular shape

High-frequency electric resistance welding creates a uniform straight seam

Weld seam is automatically normalized for consistent microstructure

Online non-destructive testing (NDT) such as ultrasonic or eddy current inspection ensures weld quality

Pipes are solution annealed, pickled, and passivated when required

This process ensures strong welds, smooth inner surfaces, and reliable performance under pressure and corrosion conditions.

ERW Stainless Steel Pipes (3)

Available Material Grades

ASTM A312 ERW stainless steel pipes are available in the following common grades:

TP304 / TP304L – General-purpose corrosion resistance

TP316 / TP316L – Enhanced resistance to chlorides and marine environments

TP321 – Titanium-stabilized for high-temperature service

TP347 – Niobium-stabilized for improved creep resistance

Other grades can be supplied upon request.

Product Specifications

Standard: ASTM A312 / ASME SA312

Manufacturing Process: ERW (Electric Resistance Welded)

Outside Diameter: Customized according to requirements

Wall Thickness: SCH 10 / SCH 40 / SCH 80 or customized

Length: Random length or fixed length

Surface Finish: Pickled & passivated, polished, or customized

End Type: Plain end, beveled end

Key Features of ASTM A312 ERW Stainless Steel Pipes

Excellent corrosion resistance for industrial environments

Strong and reliable straight seam welds

Smooth internal surface for efficient fluid flow

Uniform wall thickness and dimensional accuracy

Cost-effective alternative to seamless pipes for many applications

Full compliance with ASTM A312 requirements

Applications

ASTM A312 ERW stainless steel pipes are widely used in:

Chemical & Petrochemical Industry

Chemical processing lines

Acid and alkali transport systems

Heat exchanger piping

Oil & Gas Industry

Refinery process piping

Utility and auxiliary pipelines

Offshore and onshore facilities

Water Treatment & Desalination

Water transmission pipelines

Desalination plants

Wastewater treatment systems

Industrial & Engineering Pipelines

Power plants

Industrial fluid transportation

Mechanical and structural piping

Quality Control & Inspection

Every ASTM A312 ERW stainless steel pipe supplied by Ganyeah undergoes strict inspection, including:

Chemical composition analysis

Mechanical property testing

Weld seam NDT inspection

Dimensional inspection

Hydrostatic or pressure testing (when required)

Why Choose Ganyeah as Your ERW Stainless Steel Pipe Supplier?

Specialized in stainless steel pipe manufacturing

Advanced ERW production lines with online inspection

Strict quality management system and international certifications

Wide range of material grades and sizes

Reliable global supply capability

ASTM A312 ERW Stainless Steel Pipes offer a dependable, economical, and high-performance solution for corrosive and high-temperature piping systems. With advanced ERW technology, strict quality control, and extensive industry experience, Ganyeah Group delivers welded stainless steel pipes that meet international standards and project-specific requirements.

For technical specifications or quotation, please contact our sales team.