ASTM A312 TP 304L Stainless Steel Pipes

ASTM A312 TP 304L Stainless Steel Electropolished Pipes

ASTM A312 TP 304L Stainless Steel Electropolished Pipes are low-carbon austenitic stainless steel pipes processed through electropolishing to achieve an ultra-smooth, bright, and contamination-free surface finish. The reduced carbon content minimizes carbide precipitation during welding, ensuring enhanced corrosion resistance and suitability for high-purity applications.

The electropolishing process improves the chromium-rich passive layer, enhancing corrosion resistance while reducing surface roughness and microbial adhesion. Grade 304L electropolished pipes are widely used in pharmaceutical, food processing, biotechnology, and semiconductor industries where superior hygiene, cleanability, and long-term performance are essential.

Specifications

Standard	ASTM A312 / ASME SA312
Grade	TP 304L
Type	Seamless / Welded & Electropolished
Size Range	1/8" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule 80S
Surface Roughness	Ra ≤ 0.4 µm (or as per customer requirement)
Length	6 Meters Standard / Custom Length
End Type	Plain End, Beveled End

Key Features

• Electropolished Surface: Ultra-smooth, bright finish with reduced surface roughness.
• Low Carbon Content: Minimizes intergranular corrosion after welding.
• Enhanced Corrosion Resistance: Improved passive layer formation.
• High Purity Performance: Ideal for hygienic and cleanroom applications.
• Improved Cleanability: Reduces bacterial adhesion and contamination risks.

Chemical Composition (Typical)

Element	TP 304L (%)
Carbon	0.03 Max
Chromium	18.0 – 20.0
Nickel	8.0 – 12.0
Manganese	2.00 Max
Silicon	1.00 Max

Applications

• Pharmaceutical Manufacturing
• Food & Beverage Processing
• Biotechnology Plants
• Semiconductor Industry
• High-Purity Water & Clean Utility Systems

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Surface Roughness (Ra) Measurement
• Positive Material Identification (PMI)
• Dimensional Inspection

Conclusion

ASTM A312 TP 304L Stainless Steel Electropolished Pipes combine low carbon chemistry with a superior electropolished finish, offering enhanced corrosion resistance, exceptional cleanliness, and long-term durability. These pipes are the preferred solution for industries requiring ultra-hygienic, high-performance piping systems.