ASTM A312 TP 904L Seamless Pipes

ASTM A312 TP 904L Seamless Pipes

ASTM A312 TP 904L Seamless Pipes are high alloy austenitic stainless steel pipes designed for superior resistance to strong acids and aggressive chemical environments. Manufactured without welded joints, these pipes provide excellent structural integrity and reliability.

Grade 904L contains high levels of chromium, nickel, molybdenum, and copper, offering outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. It is widely used in chemical processing and marine industries.

Specifications

Standard	ASTM A312 / ASME SA312
Grade	TP 904L
Manufacturing Process	Hot Rolled / Cold Drawn Seamless
Size Range	1/8" NB to 24" NB
Wall Thickness	Schedule 5S to Schedule XXS
Length	6 Meters Standard / Custom Length
Surface Finish	Annealed & Pickled, Polished, Bright Finish
End Type	Plain End, Beveled End, Threaded

Key Benefits

• Exceptional Corrosion Resistance: Performs well in sulfuric and phosphoric acid environments.
• High Pitting Resistance: Excellent protection in chloride-rich conditions.
• Strong Mechanical Properties: Seamless structure ensures strength under pressure.
• Good Weldability: Low carbon content minimizes intergranular corrosion.
• Extended Service Life: Durable performance in harsh industrial applications.

Chemical Composition (Typical)

Element	904L (%)
Carbon	0.02 Max
Chromium	19.0 – 23.0
Nickel	23.0 – 28.0
Molybdenum	4.0 – 5.0
Copper	1.0 – 2.0

Applications

• Chemical Processing Plants
• Oil & Gas Industry
• Marine Equipment
• Heat Exchangers
• Pollution Control Systems
• Acid Handling Equipment

Quality Testing

• Hydrostatic Testing
• Ultrasonic Testing (UT)
• Radiographic Testing (RT)
• PMI Testing
• Dimensional Inspection

Conclusion

ASTM A312 TP 904L Seamless Pipes are ideal for highly corrosive and demanding environments. Their high alloy composition and seamless construction ensure superior durability, corrosion resistance, and long-term performance in critical industrial applications.