ASTM A312 TP304 Stainless Steel Pipe
STM A312 TP304 stainless steel pipe is a grade-specific product for high-temperature and general corrosive service where the project specification permits TP304. This page focuses on TP304 chemistry, mechanical properties, dimensions, testing, and purchasing requirements; the broader ASTM A312 specification page explains the standard across multiple grades.
| Production Standard: | ASTM A312 |
| Material Grades: | TP304(1.4307) |
| Types: | Seamless or Welded(TIG/PLASMA) |
| Tube OD: | 1/8″ – 80″, DN6-DN2000, 10.3-2032mm |
| Wall Thickness: | SCH5S – SCH80S |
| Surface: | Annealed & Pickled, Bead Blasted, Brushed Finish |
| Testing: | Hydrostatic Test, Pneumatic Test, Eddy Current Test(ECT), Ultrasonic Test (UT), X-ray Test |
| Certification: | TUV ISO 9001:2015, PED 2014/68/EU, AD 2000-W0. |
| Mill Test Certificate (MTC): | EN10204 3.1 |
| For more technical requirements and dimension specifications, please contact us to obtain support from our Engineering Department. | |
- Production Standard:
- Material Grades:
- Types:
- Tube OD:
- Wall Thickness:
- Surface:
- Testing:
- Certification:
- MTC:
- ASTM, ASME, EN, ISO, JIS
- 304/1.4301, 304L/1.4307, 316/1.4401, 316L/1.4404, 321/1.4541, 2205(S31803)/1.4462 etc.
- Seamless or Welded (TIG/PLASMA)
- 1/8" to 80", DN6-DN2000, 10.3-2032mm
- SCH5S – SCH80S
- Annealed & Pickled, Bead Blasted, Brushed Finish
- Hydrostatic Test, Pneumatic Test, Eddy Current Test (ECT), Ultrasonic Test (UT), X-ray Test
- TUV ISO 9001:2015, PED 2014/68/EU, AD 2000-W0.
- EN10204 3.1
ASTM A312 stainless steel pipe sizes and dimensions should conform to ANSI B36.19, nominal pipe size (NPS) ranges from NPS 1/8 [10.29 mm] to NPS 80 [2032 mm], Schedule number for wall thickness from Sch 5s to Sch 80s, more Pipe Schedule Sizes  are specified for special applications, the value stated respectively for a specific size, average wall and minimum wall pipe are available.
| Nominal Size | OD | Wall Thickness, SCHEDULE | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPS | DN | mm | 5S | 10S | 10 | 20 | 30 | 40S | STD | 40 | 80S | XS | 80 | 100 | 120 | 140 | 160 | XXS | |
| 1∕8" | 6 | 10.3 | 1.24 | 1.73 | 1.73 | 1.73 | 2.41 | 2.41 | 2.41 | ||||||||||
| 1∕4" | 8 | 13.7 | 1.65 | 2.24 | 2.24 | 2.24 | 3.02 | 3.02 | 3.02 | ||||||||||
| 3∕8" | 10 | 17.2 | 1.65 | 2.31 | 2.31 | 231 | 3.2 | 3.2 | 3.2 | ||||||||||
| 1∕2" | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 2.77 | 2.77 | 3.73 | 3.73 | 3.73 | 4.78 | 7.47 | |||||||
| 3∕4" | 20 | 26.7 | 1.65 | 2.11 | 2.87 | 2.87 | 2.87 | 3.91 | 3.91 | 3.91 | 5.56 | 7.82 | |||||||
| 1" | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 3.38 | 3.38 | 4.55 | 4.55 | 4.55 | 6.35 | 9.09 | |||||||
| 1-1∕4" | 32 | 42.2 | 1.65 | 2.77 | 3.56 | 3.56 | 3,56 | 4.85 | 4.85 | 4.85 | 6.35 | 9.7 | |||||||
| 1-1∕2" | 40 | 48.3 | 1.65 | 2.77 | 3.68 | 3.68 | 3.68 | 5.08 | 5.08 | 5.08 | 7.14 | 10.15 | |||||||
| 2" | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 3.91 | 3.91 | 5.54 | 5.54 | 5.54 | 8.74 | 11.07 | |||||||
| 2-1∕2" | 65 | 73 | 2.11 | 3.05 | 5.16 | 5.16 | 5.16 | 7.01 | 7.01 | 7.01 | 9.53 | 14.02 | |||||||
| 3" | 80 | 88.9 | 2.11 | 3.05 | 5.49 | 5.49 | 5.49 | 7.62 | 7.62 | 7.62 | 11.13 | 15.24 | |||||||
| 3-1∕2" | 90 | 101.6 | 2.11 | 3.05 | 5.74 | 5.74 | 5.74 | 8.08 | 8.08 | 8.08 | |||||||||
| 4" | 100 | 114.3 | 2.11 | 3.05 | 6.02 | 6.02 | 6.02 | 8.56 | 8.56 | 8.54 | 11.13 | 13.49 | 17.12 | ||||||
| 5" | 125 | 141.3 | 2.77 | 3.4 | 6.55 | 6.55 | 6.55 | 9.53 | 9,53 | 9.53 | 12.7 | 15.88 | 19.05 | ||||||
| 6" | 150 | 168.3 | 2.77 | 3.4 | 7.11 | 7.11 | 7.11 | 10.97 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | ||||||
| 8" | 200 | 219.1 | 2.77 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 8.18 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 | ||
| 10" | 250 | 273.1 | 3.4 | 4.19 | 6.35 | 7.8 | 9.27 | 9.27 | 9.27 | 12.7 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 25.4 | ||
| 12" | 300 | 323.9 | 3.96 | 4.57 | 6.35 | 8.38 | 9.53 | 9.53 | 10.31 | 12.7 | 12.7 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 | ||
| 14" | 350 | 355.6 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 12.7 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | ||||
| 16" | 400 | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 12.7 | 12.7 | 21.44 | 26.19 | 30.95 | 36.53 | 40.49 | ||||
| 18" | 450 | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 12.7 | 23.83 | 29.36 | 34.93 | 39,67 | 45.24 | ||||
| 20" | 500 | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 9.53 | 15.09 | 12.7 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | ||||
| 22" | 550 | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 9.53 | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | |||||
| 24" | 600 | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 12.7 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | ||||
| 26" | 650 | 660.4 | 7.92 | 12.7 | 9.53 | 12.7 | |||||||||||||
| 28" | 700 | 711.2 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | ||||||||||||
| 30" | 750 | 762 | 6.35 | 7.92 | 7.92 | 12.7 | 15.88 | 9.53 | 12.7 | ||||||||||
| 32" | 800 | 812.8 | 7.92 | 12.7 | 15.88 | 17.48 | 9.53 | 17.48 | 12.7 | ||||||||||
| 34" | 850 | 863.6 | 7.92 | 12.7 | 15.88 | 17.48 | 9.53 | 17.48 | 12.7 | ||||||||||
| 36" | 900 | 914.4 | 7.92 | 12.7 | 15.88 | 19.05 | 9.53 | 19.05 | 12.7 | ||||||||||
| 38" | 950 | 965.2 | - | 9.53 | 12.7 | ||||||||||||||
| 40" | 1000 | 1016 | - | 9.53 | 12.7 | ||||||||||||||
| Standard | Outside Diameter(mm) | Thickness(mm) | Length(mm) | |
|---|---|---|---|---|
| ASTM A312 | ≤48.26 | -0.4 | unspecified -12.50% | Definite cut length +6.40 -0 |
| >48.26~114.30 | 0 | |||
| >114.30-219.08 | 0.8 | |||
| >219.08~457.20 | 1.6 | |||
| >457-660 | -4 | |||
| >660-864 | -5 | |||
| >864-1219 | -5.6 | |||
| EN 10217-7 | D1±1.50% with ±0.75mm(min) D2±1.00% with ±0.50mm(min) D3±1.75% with ±0.30mm(min) D4±0.50% with ±0.10mm(min) EN ISO 1127 | T1±15.00% with±0.60mm(min) T2±12. 5% with ±0.40mm(min) T3±10.00% with±0.20mm(min) T4±7.50% with ±0.15mm(min) T5±5.00% with ±0.10mm(min) EN ISO 1127 | ＜6000 +5.00 6000~12000 +10.00 | |
| Property | Tensile Strength | Yield Strength(0.2% offset) | Elongation (in 2″) | Hardness (Rockwell B) |
| Value | ≥515 MPa (75 ksi) | ≥ 205 MPa (30 ksi) | ≥35% | ≤90 HRB |
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) | Nitrogen (N) |
| Composition (%) | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0-20.0 | 8.0-11.0 | ≤0.10 |
| Standard | Equivalent Grade |
| UNS | S30400(TP304) |
| EN (Europe) | 1.4301(304) |
| JIS (Japan) | SUS 304 |
1, Oil & Gas Industry
Transportation of crude oil, natural gas, and refined products Â
Offshore platforms and pipelines (resistant to seawater corrosion)
Downhole tubing and casing in harsh environments Â
2, Chemical & Petrochemical Industry
Acid and chemical transport (resistant to corrosive substances) Â
Heat exchangers, reactors, and storage tanks Â
Highpressure and hightemperature applications Â
3, Food & Beverage Industry
Sanitary tubing for milk, beer, juice, and other liquids Â
Dairy processing and brewing equipment (easy to clean, nonreactive) Â
Conveying systems for food production Â
4, Pharmaceutical & Biotechnology
Highpurity piping for drug manufacturing Â
Sterile processing and cleanroom applications Â
Bioreactors and filtration systems Â
5, Water Treatment & Desalination
Seawater desalination plants (resistant to saltwater corrosion) Â
Wastewater treatment and distribution systems Â
Hydraulic and plumbing systems Â
6, Power Generation
Boiler tubes and steam pipelines in thermal power plants Â
Nuclear power plant cooling systems Â
Exhaust systems and heat recovery units Â
7, Automotive & Aerospace
Exhaust systems (e.g., manifolds, mufflers) Â
Hydraulic and fuel lines Â
Aircraft structural components and jet engine parts Â
8, Construction & Architecture
Structural frameworks and handrails Â
Underground piping for drainage and HVAC systems Â
Decorative applications (e.g., facades, bridges) Â
9, Pulp & Paper Industry
Chemical recovery systems Â
Bleaching and digesting equipment Â
Piping for corrosive pulp processing liquids Â
10, Mining & Mineral Processing
Slurry transport pipelines Â
Acid leaching systems Â
Dewatering and tailings management Â
