Seam welding ASTM A778 Steel Pipe

ASTM A778 Unannealed Austenitic Stainless Steel Welded Pipes – High-Strength, Corrosion-Resistant Solutions for Industrial Applications

Explore premium-grade ASTM A778 welded stainless steel pipes designed for demanding environments where durability, strength, and corrosion resistance are non-negotiable. These straight or spiral butt-welded tubes are manufactured using high-quality flat rolled steel coils or plates through shielded arc welding techniques, ensuring consistent mechanical properties across all sizes. Ideal for low to medium temperature applications, these seamless-looking pipe products offer exceptional performance without requiring additional surface treatments to achieve corrosion resistance—making them a cost-effective choice for global industries.

Engineered with advanced metallurgical processes, our ASTM A778 pipes deliver superior tensile strength, excellent surface finish, and long-term reliability under extreme conditions. Available in outer diameters ranging from 3 inches (75 mm) up to 48 inches (1200 mm), with wall thicknesses between 0.062 inches (1.5 mm) and 0.500 inches (12.5 mm), they meet stringent international standards while offering flexibility for custom configurations. Whether you need circular, rectangular, square, or elliptical profiles, we provide tailored solutions that align with your engineering specifications and project requirements.

Key features include outstanding rust prevention, wear resistance, structural integrity, and ease of installation—ideal for pipelines exposed to aggressive chemicals, high-pressure systems, or fluctuating thermal environments. The polished, brushed, mirror-finish (8K), or plated variants such as rose gold, black Titanium, champagne gold, bronze, or ice copper coatings enhance both functionality and aesthetic appeal, making them suitable for architectural and industrial uses alike. Each product undergoes rigorous quality inspections before delivery to ensure compliance with ASME SA-778 standards and customer expectations.

Commonly used in oil & gas infrastructure, chemical processing plants, power generation facilities, desalination units, food and beverage production lines, pharmaceutical equipment, and marine engineering, these pipes support critical operations worldwide. Their ability to withstand high pressure, resist pitting and crevice corrosion, and maintain dimensional stability over time makes them indispensable in sectors prioritizing safety, longevity, and minimal maintenance costs.

Customers consistently praise the uniformity of finish, precision in manufacturing tolerances, and consistent mechanical behavior across batches. Many report reduced downtime due to fewer leaks or failures compared to alternative materials. With a reputation built on technical expertise and reliable supply chains, our team ensures every order meets global regulatory benchmarks while supporting sustainability goals through durable, reusable components.

Q: What distinguishes ASTM A778 from other Stainless Steel Pipe grades? A: Unlike annealed counterparts, unannealed A778 pipes retain higher yield strength and better formability post-welding, ideal for fabrication-heavy projects. They also require no extra treatment for corrosion resistance—offering immediate application benefits.

Q: Can I get custom shapes or finishes beyond standard options? A: Yes, we offer various cross-sectional geometries—including square, rectangular, and oval—and multiple surface treatments like mirror polish, brushed metal, or decorative plating such as rose gold or titanium nitride coating—for both functional and visual purposes.

Q: Are these pipes suitable for high-pressure environments? A: Absolutely. With enhanced tensile strength and robust weld integrity, these pipes perform reliably under elevated pressures, especially when used in process piping, boiler feed systems, or hydraulic circuits.