ASTM A312 / ASME SA312
ASTM A312 / ASME SA312 Seamless & Welded Stainless Steel Pipes
Emirerri Steel is a leading supplier and exporter of ASTM A312 / ASME SA312 stainless steel pipes, manufactured for high-temperature and general corrosive service. These pipes are widely used in industries such as petrochemical, chemical processing, oil & gas, food processing, and power generation.
What is ASTM A312 / ASME SA312?
ASTM A312 / ASME SA312 covers seamless, welded, and heavily cold-worked austenitic stainless steel pipes.
Pipes are intended for high-temperature and corrosive service.
Available in multiple grades, offering a combination of strength, durability, and corrosion resistance.
ASTM A312 / ASME SA312 Grades
Standard Austenitic Stainless Steel Grades
- TP304
- TP304L (Low carbon)
- TP304N (Nitrogen enhanced)
- TP304LN (Low carbon, nitrogen enhanced)
- TP309S
- TP309Cb
- TP310S
- TP310Cb
- TP316
- TP316L (Low carbon)
- TP316Ti (Titanium stabilized)
- TP316N (Nitrogen enhanced)
- TP316LN (Low carbon, nitrogen enhanced)
- TP317
- TP317L (Low carbon)
- TP317LN (Low carbon, nitrogen enhanced)
- TP321 (Titanium stabilised)
- TP347 (Niobium stabilized)
- TP347LN (Low carbon, nitrogen enhanced, Niobium stabilized)
- TP348 (Niobium stabilized, with specific Co+Ta limits)
- TP444 (A ferritic grade, also listed in some standards)
ASTM A312 / ASME SA312 pipe sizes
| Nominal Pipe Size (NPS) | Outside Diameter (OD) [in] | Schedule 10S WT [in] | Schedule 40S WT [in] | Schedule 80S WT [in] |
|---|---|---|---|---|
| 1/8 | 0.405 | 0.049 | 0.068 | 0.095 |
| 1/4 | 0.540 | 0.065 | 0.088 | 0.119 |
| 3/8 | 0.675 | 0.065 | 0.091 | 0.126 |
| 1/2 | 0.840 | 0.083 | 0.109 | 0.147 |
| 3/4 | 1.050 | 0.083 | 0.113 | 0.154 |
| 1 | 1.315 | 0.109 | 0.133 | 0.179 |
| 1 1/4 | 1.660 | 0.109 | 0.140 | 0.191 |
| 1 1/2 | 1.900 | 0.109 | 0.145 | 0.200 |
| 2 | 2.375 | 0.109 | 0.154 | 0.218 |
| 2 1/2 | 2.875 | 0.120 | 0.203 | 0.276 |
| 3 | 3.500 | 0.120 | 0.216 | 0.300 |
| 4 | 4.500 | 0.120 | 0.237 | 0.337 |
| 6 | 6.625 | 0.134 | 0.280 | 0.432 |
| 8 | 8.625 | 0.148 | 0.322 | 0.500 |
| 10 | 10.750 | 0.165 | 0.365 | 0.500 |
| 12 | 12.750 | 0.180 | 0.375 | 0.500 |
| 14 | 14.000 | 0.188 | 0.375 | 0.500 |
| 16 | 16.000 | 0.188 | 0.375 | 0.500 |
| 18 | 18.000 | 0.188 | 0.375 | 0.500 |
| 20 | 20.000 | 0.218 | 0.375 | 0.500 |
| 24 | 24.000 | 0.250 | 0.375 | 0.500 |
Key Characteristics of ASTM A312 / SA312 Pipes
Types: Seamless, Welded, Heavily Cold Worked
Finishes: Annealed, Pickled, Polished
Testing: Hydrostatic & non-destructive electric tests
Certification: Supplied with Mill Test Certificates (MTC) EN 10204 3.1/3.2
Quality Standards: Conforms to ASTM, ASME, and international norms
Specifications
Standard: ASTM A312 / ASME SA312
Size Range: OD 1/8” to 36”
Wall Thickness: SCH 5S to SCH XXS
Length: Single Random, Double Random, or Cut Lengths
Grades: 304, 304L, 316, 316L, 304H, 316H, 321H, 347H, 310H, and others
Applications
Chemical & Petrochemical Industry
Oil & Gas Processing
Food & Beverage Industry
Power Plants & Boilers
Pharmaceutical & Biotech Sector
Marine & Offshore Equipment