ASTM A358 EFW 304 / 304L Pipes

ASTM A358 EFW 304 / 304L Pipes

ASTM A358 EFW 304 / 304L Pipes are high-quality stainless steel welded pipes manufactured using the Electric Fusion Welding (EFW) process. These pipes provide excellent strength, corrosion resistance, and uniform wall thickness, making them ideal for high-pressure and industrial applications.

Grade 304 offers excellent corrosion resistance and mechanical strength, while 304L (low carbon version) provides improved weldability and minimizes the risk of carbide precipitation during welding.

Specifications

Standard	ASTM A358 / ASME SA358
Grades	304 / 304L
Manufacturing Process	Electric Fusion Welded (EFW)
Size Range	1/2" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule 80S
Length	6 Meters Standard / Custom Length
Surface Finish	Annealed & Pickled, Polished, Matte Finish
End Type	Plain End, Beveled End, Threaded

Key Benefits

• Strong Welded Joints: Electric fusion welding provides reliable, leak-proof longitudinal joints.
• Uniform Wall Thickness: Maintains consistency along the entire pipe length for improved reliability.
• Excellent Corrosion Resistance: Resistant to chemical, oxidation, and saline environments.
• High Strength: Suitable for high-pressure and high-temperature applications.
• Improved Weldability (304L): Reduces risk of carbide precipitation and intergranular corrosion.
• Cost-Effective: Efficient production method with lower material wastage compared to seamless pipes.
• Versatile Applications: Widely used in oil & gas, chemical, power, and food industries.

Chemical Composition (Typical)

Element	304 (%)	304L (%)
Carbon	0.08 Max	0.03 Max
Chromium	18.0 – 20.0	18.0 – 20.0
Nickel	8.0 – 10.5	8.0 – 12.0

Applications

• Chemical Processing Plants
• Food & Beverage Industry
• Heat Exchangers
• Water Treatment Systems
• Structural Fabrication

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• PMI Testing
• Dimensional Inspection

Conclusion

ASTM A358 EFW 304 / 304L Pipes offer a perfect combination of strength, corrosion resistance, and cost-efficiency. Their electric fusion welded construction, consistent wall thickness, and compliance with ASTM standards make them a trusted choice for critical industrial piping systems across chemical, power, food, and structural applications.