304 Stainless Steel Exhaust Tubing

304 stainless steel exhaust pipe has an austenitic structure of 18% chromium + 8% nickel, which can resist sulfide, nitrogen oxide and acid rain corrosion in exhaust gas. 304 stainless steel pipe has been pickled and passivated to enhance its salt spray resistance and pass the 1000-hour salt spray test (ASTM B117).
304 stainless steel automobile exhaust pipe has high temperature resistance: it can withstand 600℃ for a long time and 800℃ for a short time, and has an anti-oxidation layer to prevent high temperature oxidation and peeling. It is suitable for engine exhaust system and industrial furnace exhaust pipe.

Material	304 Stainless Steel (Cr18-20%, Ni8-10%, C≤0.07%)
Standards	ASTM A312 / EN 10312 / GB/T 12771
OD (Outer Diameter)	25mm – 350mm (customizable up to 12 meters in length)
Wall Thickness	1.5mm – 8mm (standard range)
Length	Customizable: 1m – 12m (stock lengths: 6m, 9m, 12m)
Pressure Rating	Up to 1.5MPa (based on OD and wall thickness)
Surface Finish	Bright Annealed (BA), Pickled & Passivated, or Polished (Ra ≤0.8μm)
Corrosion Resistance	1000+ hours in ASTM B117 Salt Spray Test
End Type	Plain End, Beveled End, or Custom Flanged Ends (ANSI/ASME B16.5)

Reasons to choose us

18+ years of focus on stainless steel exhaust pipe production, serving 30+ industrial customers worldwide.
Ultrasonic flaw detection, water pressure test (2 times working pressure for 10 minutes), spectral analysis.
Scaled production reduces costs, prices are 15-20% lower than similar European products, providing factory direct prices. 

Mechanical Testing Such as Tensile of Area
Hardness Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Flaring Test
Intergranular Corrosion (IGC) Test

Q. What is the difference between 304 exhaust pipe and 316 exhaust pipe?
A. Composition difference: 316 contains 2-3% molybdenum, which is more resistant to chloride ion corrosion and high temperature.
Cost: The price of 316 is 15-30% higher than that of 304.
Q. How long is the service life of 304 exhaust pipe?
A. Design life: It can reach more than 10 years under normal working conditions, and the maintenance cost is 50% lower than that of carbon steel.