Stainless Steel EFW Pipes

Our Stainless Steel EFW Pipes are austenitic stainless steel welded pipes manufactured in accordance with ASTM A778 specifications. They are produced from flat-rolled stainless steel sheets using an electric fusion welding process, offering excellent corrosion resistance and good mechanical strength. They are supplied in the as-welded condition (without annealing) and are suitable for corrosion-resistant applications in medium and low-temperature environments.

Outer Diameter: 5mm-420mm (customizable)
Wall Thickness: 0.5mm-55mm (customizable)
Length: Can be customized upon request
Standards: ASTM A778,ASTM A409 Or as per customer specifications.
Steel Grade: TP304L TP316L TP317L TP321 TP347

Products Description

Our Advantages

1. Weld Quality
Our Stainless Steel EFW Pipes are manufactured using Electric Fusion Welding (EFW) technology, resulting in strong, defect-free welds with uniform penetration, making them suitable for medium- and low-temperature environments.

2.Material Control
Our welded pipes are made from high-quality austenitic stainless steel, subjected to rigorous chemical composition testing to ensure compliance with ASTM A778 standards.

3. Process Advantages
Our mature and controllable EFW (Electric Fusion Welding) process enables the production of large-diameter, continuous-length pipes, meeting the demands of large-scale engineering projects.

4. Economical and Efficient
Our welded pipes are supplied in the as-welded condition without requiring solution heat treatment. This results in lower costs and shorter delivery times.

5. Excellent Machinability
Our pipes exhibit excellent forming and bending properties and are compatible with all standard welding methods. The pipes can be cut, bent, and formed without cracking or losing integrity.

6. Quality Control
Our pipes undergo hydrostatic testing and non-destructive testing to ensure leak-free welds and a smooth, scale-free surface. We provide traceability from raw materials to finished pipes.

application areas

Chemical and petrochemical process piping
Water treatment and desalination systems
Pulp and paper industry piping
Heat exchanger and condenser systems
HVAC and utility piping
Industrial exhaust, drainage, and structural applications

Chemical Composition

Element	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Cr (%)	Ni (%)	Mo (%)	Ti / Nb
TP304L	≤0.03	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–12.0	-	-
TP317L	≤0.03	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	11.0–15.0	3.0–4.0	-
TP321	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	17.0–19.0	9.0–12.0	-	Ti ≥5×C
TP347	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	17.0–19.0	9.0–13.0	-	Nb + Ta ≥10×C

Mechanical Properties

Property	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
TP304L	≥515	≥205	≥35
TP317L	≥515	≥205	≥35
TP321	≥515	≥205	≥35
TP347	≥515	≥205	≥35

Possible Alternative Grades

Alternative Grades	Reasons
TP310S	It possesses excellent oxidation resistance and high-temperature strength, making it suitable for furnace tubes, heat treatment equipment, high-temperature process piping, and heat treatment systems.
TP904L	It performs exceptionally well in highly corrosive media, making it suitable for chemical processing plants, fertilizer production, flue gas desulfurization units, and seawater treatment systems.
2205	Combining high mechanical strength and excellent corrosion resistance, it is suitable for offshore platforms, oil and gas pipelines, and chemical transportation pipelines.