ASTM A358 SS EFW Welded Pipe Supplier in India

ASTM A358 covers Electric Fusion Welded (EFW) austenitic chromium-nickel stainless steel pipe intended for high-temperature and general corrosive service. Unlike seamless pipe manufactured from solid billets, A358 pipe is made by rolling plate and welding it using automatic welding processes such as GTAW, GMAW, or SAW. The key advantage is the ability to produce very large diameters (up to 60 inches and beyond) that are impractical to manufacture seamlessly. Class 1 requires 100% radiography of the weld, making it suitable for the most critical applications including ASME pressure vessels and nuclear service.

ASTM A358 defines five classes based on weld examination requirements. Class 1 requires 100% radiographic examination of the longitudinal weld and is mandatory for lethal service and most ASME Code applications. Class 2 requires spot radiography. Class 3 has no mandatory radiographic examination but requires visual inspection. Class 4 is for circumferential welds only with spot radiography. Class 5 requires 100% ultrasonic examination as an alternative to radiography. For critical chemical and petrochemical service, Class 1 is the standard specification. Creative Metal Industries stocks primarily Class 1 pipe for maximum reliability.

Creative Metal Industries supplies ASTM A358 EFW pipe in outside diameters ranging from 8 inches (203mm) to 60 inches (1524mm) with wall thicknesses from Schedule 5S through Schedule 40S. Standard lengths are 6 meters and 12 meters, with custom cut lengths available. We maintain ready stock of popular sizes in TP304 and TP316L grades in 8 through 36 inch diameters. Larger sizes above 36 inches and exotic grades like TP321 and TP347 are available on a made-to-order basis with typical lead times of 8-12 weeks from our approved mills.

Yes, ASTM A358 pipe is specifically designed for ASME Code applications. The ASME equivalent is SA358, which is adopted in the ASME Boiler and Pressure Vessel Code Section II Part A. It is widely used in ASME Section VIII Division 1 and 2 pressure vessels, ASME B31.3 Process Piping, and ASME B31.1 Power Piping. Class 1 pipe with 100% radiography receives the full design stress allowance without any weld joint efficiency reduction. This makes A358 Class 1 EFW pipe equivalent to seamless pipe for pressure design purposes under the ASME Code.

All ASTM A358 pipe supplied by Creative Metal Industries comes with comprehensive documentation including Material Test Certificate (MTC) per EN 10204 Type 3.1 or 3.2, radiographic examination reports (100% RT for Class 1), hydrostatic test certificate at 1.5 times the design pressure, chemical composition analysis, mechanical test results (tensile, yield, elongation), intergranular corrosion test per ASTM A262 Practice E (when specified), and positive material identification (PMI) report. We also provide PED 2014/68/EU certification for European exports and NACE MR0175 compliance documentation for sour service applications.

In India, ASTM A358 EFW pipe is extensively used in chemical and petrochemical plants for large-diameter process piping carrying corrosive fluids. Major applications include fertilizer plant transfer lines, refinery crude distillation overhead piping, power plant main steam and feedwater headers, desalination plant seawater intake and brine piping, pharmaceutical plant utility distribution, and pulp and paper mill chemical recovery systems. The ability to produce large diameters economically makes A358 EFW pipe the preferred choice over seamless for sizes above 8 inches in most stainless steel piping systems.