ASTM A358 Stainless Steel Welded Pipes

What Is ASTM A358?

ASTM A358 is a specification developed by ASTM International for electric-fusion-welded austenitic chromium-nickel stainless steel pipe intended for high-temperature and general corrosive service. This specification covers a wide range of stainless steel grades and five classes of welding techniques, offering high-performance welded pipes used in various industrial applications.

Under ASTM A358, the pipes are produced with full or spot radiographic testing, hydrostatic testing, and strict dimensional and quality control to ensure reliability and corrosion resistance. The standard applies to both straight-seam and spiral-seam welded pipes, emphasizing durability, dimensional accuracy, and corrosion protection.

Product Description: ASTM A358 Stainless Steel Welded Pipes

ASTM A358 Stainless Steel Welded Pipes are widely used in petrochemical plants, refineries, power generation, pharmaceutical industries, food processing, and paper & pulp industries. These pipes are known for their high strength, excellent corrosion resistance, and ability to perform in extreme temperatures.

At Ganyeah Group, we manufacture and supply ASTM A358 stainless steel welded pipes in a wide range of grades, sizes, wall thicknesses, and finishes to meet specific client requirements.

Available Grades

We offer the following stainless steel grades under the ASTM A358 standard:

ASTM A358 TP 304/TP304L/TP 304H

ASTM A358 TP 309 / TP 309S

ASTM A358 TP 310 / TP 310S

ASTM A358 TP 316 / TP 316L / TP 316H

ASTM A358 TP 317L

ASTM A358 TP 321 / TP 321H

ASTM A358 TP 347 / TP 347H

ASTM A358 TP 904L

These grades cover a broad spectrum of mechanical and chemical properties to suit various applications and environments.

Material Comparison Table

Grade	Nickel (%)	Chromium (%)	Molybdenum (%)	Application Environment
TP304	8.0–10.5	18.0–20.0	—	General corrosion, water systems
TP304L	8.0–12.0	18.0–20.0	—	Welded structures, low carbon for resistance to sensitization
TP316	10.0–14.0	16.0–18.0	2.0–3.0	Chloride environments, marine industries
TP316L	10.0–14.0	16.0–18.0	2.0–3.0	Pharmaceutical, marine, chemical plants
TP321	9.0–12.0	17.0–19.0	—	High-temperature resistance
TP347	9.0–13.0	17.0–19.0	—	Chemical and power generation plants
TP904L	23.0–28.0	19.0–23.0	4.0–5.0	Extreme corrosion resistance environments

Advantages of ASTM A358 Stainless Steel Welded Pipes

Corrosion Resistance
ASTM A358 pipes, especially in grades like 316L and 904L, offer superior corrosion resistance, making them suitable for aggressive environments like offshore and chemical industries.

High-Temperature Stability
Grades such as 310 and 321 provide excellent performance under high temperatures, ideal for furnace and heat exchanger applications.

Cost-Effective Production
Compared to seamless pipes, stainless steel welded pipes offer a more economical solution while maintaining structural integrity and corrosion resistance.

Customizability
These pipes are available in a wide range of diameters and wall thicknesses, with options for surface finish, welding class, and heat treatment.

Compliance with International Standards
Ganyeah Group ensures that all products meet the exacting standards set by ASTM A358, and additional compliance with ASME, EN, or DIN is available upon request.

Our Processing Capabilities

Outer Diameter: 8″ to 72″

Wall Thickness: SCH 10 to SCH 160 or customized

Pipe Length: Up to 12 meters or as per customer requirement

Welding Class: Class 1 to Class 5 (based on radiographic and heat treatment requirements)

Surface Finish: Pickled, polished, brushed, or custom

End Types: Plain End, Beveled End, Threaded End

Quality Control & Testing

At Ganyeah Group, we implement rigorous quality assurance processes throughout production. Our testing capabilities include:

Radiographic Testing (RT)

Ultrasonic Testing (UT)

Hydrostatic Testing

Mechanical Property Testing (Tensile, Yield, Elongation)

Chemical Composition Analysis (PMI Testing)

Intergranular Corrosion Test (IGC)

Surface Roughness Inspection

Dimensional Accuracy Verification

All welded pipes are supplied with full traceability documentation including MTC (EN 10204 3.1/3.2), inspection reports, and third-party certifications if required.

Applications of ASTM A358 Welded Pipes

Oil & Gas pipelines

Chemical processing

Pulp & paper industry

Power generation

Water treatment plants

Food and beverage processing

Heat exchangers and pressure vessels

Why Choose Ganyeah Group?

Ganyeah Group is a trusted global supplier of ASTM A358 Stainless Steel Welded Pipes. We are committed to quality, precision, and customer satisfaction. Our factory is equipped with advanced welding, heat treatment, and NDT inspection facilities, enabling us to deliver consistently reliable products on time and on budget.

We strictly adhere to the ASTM A358 production standards and never skip essential processes like solution annealing or radiographic testing to cut corners, unlike some low-quality producers in the market.

Conclusion

If you are seeking high-performance ASTM A358 Stainless Steel Welded Pipes with certified quality and customizable specifications, Ganyeah Group is your ideal partner. Contact us today for a quote or technical consultation.