304 Welded Stainless Steel Pipe

304 Welded Stainless Steel Pipe is made of austenitic stainless steel 304. Thanks to its chromium and nickel alloy composition, a dense passivation film is formed on the surface, which can effectively resist corrosion from the atmosphere, water vapor, and various chemicals. It also has excellent machinability and weldability. It is usually used for general-purpose pipelines that require high corrosion resistance but moderate chloride exposure.
Outer Diameter: 5mm-420mm (customizable)
Wall Thickness: 0.5mm-55mm (customizable)
Length: Can be customized upon request
Steel Grade:304/304L
Standards: ASTM A312, ASTM A269, EN 10217-7

Products Description

Our advantages

1. Strong Corrosion Resistance

Our 304 Welded Stainless Steel Pipe is made of high-quality 304/304L stainless steel and has passed PMIPMI certification, ensuring compliance with quality standards. It resists most corrosive media, including weak acids, bases, and moisture.
The pipe undergoes salt spray and intergranular corrosion testing to ensure corrosion resistance after welding.

2. High Welding Quality

We use TIG and laser welding to produce 304 Welded Stainless Steel Pipe, ensuring uniform, clean welds free of porosity and inclusions.
After welding, the pipe undergoes an acid wash to restore its smooth surface, ensuring no compromise in heat transfer efficiency or corrosion resistance, making it ideal for use in heat exchangers and condensers.

3. Machinability and Weldability

Our pipes are highly machinable and can undergo secondary operations such as cutting, drilling, and finishing.
Welding with TIG, MIG, and Laser Welding is possible, though appropriate post-weld treatment is required to restore corrosion resistance.

applications areas

Automotive and Mechanical Systems: Used in exhaust systems, cooling circuits, and mechanical components requiring corrosion resistance.
Industrial Applications: Compressed air, gas, and general industrial piping.
Fluid Transportation: Building water systems, fire hoses, municipal water networks, gas distribution, etc.
Heating, Ventilation, and Air Conditioning (HVAC): Ventilation ducts, smoke exhaust ducts, heat exchanger housings, fan systems, etc.
Machinery Manufacturing: Frames, conveyor rollers, protective sleeves, etc. for textile, printing, and packaging machinery.

Chemical Composition

Element	Carbon	Manganese	Silicon	Phosphorus	Sulfur	Chromium	Nickel
304	≤0.08	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–11.0
304L	≤0.035	≤2.00	≤1.00	≤0.045	≤0.030	18.0–20.0	8.0–12.0

Mechanical Properties

Property	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HRB)
304 / 304L	≥515	≥205	≥35	≤90

Possible Alternative Grades

Alternative Grades	Reasons
316 / 316L	Higher corrosion resistance, especially in chloride-rich environments
321	Titanium-stabilized, better for elevated temperature service
2205 Duplex Stainless Steel	Higher strength and resistance to stress corrosion cracking
201 / 202	Economical option for non-critical corrosion environments