Nickel Alloy

— Material Specifications and Industrial Applications

Explore ASTM A778 stainless steel welded pipe standards, corrosion-resistant properties, and industrial applications. Learn how MTSCO delivers high-quality welded pipes for chemical, marine, and energy industries with ISO-certified solutions.

Stainless steel welded pipe has become a core component of modern industrial piping systems in the chemical, energy and offshore industries due to its excellent corrosion resistance and economy. As a professional piping manufacturer, MTSCO has a deep understanding of the ASTM standard to provide you with an analysis of the technical characteristics and engineering value of ASTM A778 welded pipe.

ASTM A778 is a technical specification for non-pressurized welded austenitic stainless steel pipe, focusing on heat exchangers, structural support and fluid transportation scenarios, and its core requirements include:

Material range: covering 304/304L, 316/316L, 317L and other conventional austenitic steel, as well as 2205 duplex steel and other special materials

Manufacturing process: continuous molding by automatic welding process (TIG/MIG), weld seams need to be 100% ray or eddy current testing

Dimensional tolerance: allowable deviation of ±0.8% for outer diameter, wall thickness tolerance is controlled within ±10%.

Surface treatment: Ra≤1.6μm after pickling and passivation, eliminating weld oxidized color.

All MTSCO ASTM A778 welded pipes have passed ISO 9001 quality system certification, and we can provide EN 10217-7, ASME SA-312 and other standards conversion services according to customer needs.

Typical Application Scenarios and Engineering Practices

1. Chemical plants

Heat exchanger tube bundle: 316L welded tubes can last up to 15 years in Cl-containing medium.

Reactor support structure: 2205 duplex steel welded pipe is 2 times stronger than 304.

Acid and alkali transport pipeline: inner wall electrolytic polishing treatment to achieve Ra ≤ 0.4μm

2. Marine engineering

Seawater cooling system: super duplex steel welded pipe with pitting corrosion resistance equivalent PREN ≥ 40

LNG tank support: -196℃ low-temperature impact work ≥100J

Marine exhaust pipe: 6mm wall thickness welded pipe passed IMO fire certification.

3. environmental protection equipment

Flue gas desulfurization shower pipe: MTSCO patented coating welded pipe, wear resistance increased by 3 times

Wastewater treatment aeration pipe: laser welding process ensures 0.05mm porosity control standard.

MTSCO, a leading manufacturer of stainless steel piping systems, specializes in stainless steel welded pipe that meets ASTM A778 standards. We utilize advanced welding and quality control techniques to ensure corrosion resistance, dimensional accuracy and weld quality. Whether it's a standard or customized size, we provide quality piping solutions for our customers.

Welcome to contact us for more product information and quotation, we look forward to providing the best quality stainless steel welded pipe for your piping project!

ASTM A778 Welded Pipe,Stainless Steel Welded Pipe,Corrosion Resistant Piping,Industrial Pipe Applications,Welded Pipe Standards