The ASTM A312 Pipe for Chemical Processing is manufactured in accordance with the internationally recognized ASTM A312 standard, which specifies seamless, straight-seam welded, and heavily cold-worked welded austenitic stainless steel pipes. Designed specifically for high-corrosion and high-temperature service in chemical plants, this pipe offers excellent resistance to a wide range of aggressive media, including acids, alkalis, solvents, and chemical intermediates. Its seamless construction ensures uniform wall thickness, no weld-related defects, and reliable performance under pressure.
Product Specifications
| Parameter |
Details |
| Standards |
ASTM A312 / ASME SA312 |
| Available Grades |
304, 304L, 304H, 316, 316L, 316H, 316Ti, 317L, 321, 321H, 347, 347H, 310S |
| Outer Diameter |
6 mm – 610 mm (1/8″ – 24″ NPS) |
| Wall Thickness |
Schedule 5S, 10S, 40S, 80S, 160, XXS; or custom |
| Length |
Fixed lengths 3m / 6m, or random lengths upon request |
| Manufacturing Process |
Seamless – Cold drawn / Hot rolled |
| Surface Finish |
Annealed, pickled, passivated |
| End Finish |
Plain ends, beveled ends, threaded, or grooved |
Chemical Composition
| Grade |
C ≤ |
Si ≤ |
Mn ≤ |
P ≤ |
S ≤ |
Cr |
Ni |
Mo |
Others |
| 304L |
0.03 |
0.75 |
2.00 |
0.045 |
0.030 |
18.0-20.0 |
8.0-12.0 |
– |
– |
| 316L |
0.03 |
0.75 |
2.00 |
0.045 |
0.030 |
16.0-18.0 |
10.0-14.0 |
2.0-3.0 |
– |
| 317L |
0.03 |
0.75 |
2.00 |
0.045 |
0.030 |
18.0-20.0 |
11.0-15.0 |
3.0-4.0 |
– |
| 321 |
0.08 |
0.75 |
2.00 |
0.045 |
0.030 |
17.0-19.0 |
9.0-12.0 |
– |
Ti ≥ 5*C |
| 347 |
0.08 |
0.75 |
2.00 |
0.045 |
0.030 |
17.0-19.0 |
9.0-13.0 |
– |
Nb ≥ 8*C |
| 310S |
0.08 |
0.75 |
2.00 |
0.045 |
0.030 |
24.0-26.0 |
19.0-22.0 |
– |
– |
Composition per ASTM A312 requirements. Low carbon (L) grades provide enhanced weldability and intergranular corrosion resistance.
Mechanical Properties
| Grade |
Tensile Strength (MPa) min |
Yield Strength (MPa) min |
Elongation (%) min |
Hardness (HB) max |
| 304L |
485 |
170 |
40 |
201 |
| 316L |
485 |
170 |
40 |
217 |
| 317L |
515 |
205 |
40 |
217 |
| 321 |
515 |
205 |
40 |
217 |
| 347 |
515 |
205 |
40 |
217 |
| 310S |
515 |
205 |
40 |
217 |
Tested in accordance with ASTM E8 / E8M.
Key Features for Chemical Processing
- ASTM A312 Compliance – Meets strict industry standards for chemical service
- Wide Chemical Compatibility – Resistant to organic and inorganic acids, caustics, salts, and solvents
- Excellent Corrosion Resistance – Molybdenum grades (316/317L) excel in chloride and reducing acid environments
- Stabilized Grades Available – 321 and 347 prevent intergranular corrosion after welding
- High-Temperature Performance – 310S for extreme heat applications (up to 1150°C)
- Pressure Integrity – Seamless design eliminates weld seam as a potential failure point
- Passivated Surface – Enhances corrosion resistance and maintains product purity
Applications
- Chemical Reactors – Feed and discharge piping
- Heat Exchangers – Shell and tube, cooling coils
- Distillation Columns – Liquid and vapor transfer lines
- Storage Tank Piping – Transfer and circulation systems
- Acid Handling Systems – Sulfuric, nitric, phosphoric, acetic acid service
- Caustic Service – Sodium hydroxide and other alkaline media
- Solvent Transport – Organic and inorganic solvent pipelines
- Pharmaceutical Intermediates – High-purity process lines
- Fertilizer Production – Ammonia and urea service
Contact Us
For inquiries, technical datasheets, or custom sizes, please contact our sales team.