ASTM A312 304 304L 316 316L Stainless Steel Pipe
ASTM A312 is the standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipes used in high-temperature and corrosive service applications. It is one of the most widely used standards for industrial stainless steel piping.
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| Production Standard: | ASTM, ASME, EN, ISO, JIS |
| Material Grades: | AISI 304(1.4301), 304L(1.4307), 316(1.4401), 316L(1.4404), 321(1.4541), S32205(S31803)/1.4462 |
| Types: | Seamless or Welded(PLASMA+TIG) |
| 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 (Tube OD) | Wall Thickness, SCHEDULE | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DN | NPS(inch) | mm | 5S | 10S | 40S | STD | 80S | |||
| 6 | 1∕8" | 10.3 | – | 1.24 | 1.73 | 1.73 | 2.41 | |||
| 8 | 1∕4" | 13.7 | – | 1.65 | 2.24 | 2.24 | 3.02 | |||
| 10 | 3∕8" | 17.2 | – | 1.65 | 2.31 | 2.31 | 3.2 | |||
| 15 | 1∕2" | 21.3 | 1.65 | 2.11 | 2.77 | 2.77 | 3.73 | |||
| 20 | 3∕4" | 26.7 | 1.65 | 2.11 | 2.87 | 2.87 | 3.91 | |||
| 25 | 1" | 33.4 | 1.65 | 2.77 | 3.38 | 3.38 | 4.55 | |||
| 32 | 1-1∕4" | 42.2 | 1.65 | 2.77 | 3.56 | 3.56 | 4.85 | |||
| 40 | 1-1∕2" | 48.3 | 1.65 | 2.77 | 3.68 | 3.68 | 5.08 | |||
| 50 | 2" | 60.3 | 1.65 | 2.77 | 3.91 | 3.91 | 5.54 | |||
| 65 | 2-1∕2" | 73 | 2.11 | 3.05 | 5.16 | 5.16 | 7.01 | |||
| 80 | 3" | 88.9 | 2.11 | 3.05 | 5.49 | 5.49 | 7.62 | |||
| 90 | 3-1∕2" | 101.6 | 2.11 | 3.05 | 5.74 | 5.74 | 8.08 | |||
| 100 | 4" | 114.3 | 2.11 | 3.05 | 6.02 | 6.02 | 8.56 | |||
| 125 | 5" | 141.3 | 2.77 | 3.4 | 6.55 | 6.55 | 9.53 | |||
| 150 | 6" | 168.3 | 2.77 | 3.4 | 7.11 | 7.11 | 10.97 | |||
| 200 | 8" | 219.1 | 2.77 | 3.76 | 8.18 | 8.18 | 12.7 | |||
| 250 | 10" | 273.1 | 3.4 | 4.19 | 9.27 | 9.27 | 12.7 | |||
| 300 | 12" | 323.9 | 3.96 | 4.57 | 9.53 | 9.53 | 12.7 | |||
| 350 | 14" | 355.6 | 3.96 | 4.78 | – | 9.53 | – | |||
| 400 | 16" | 406.4 | 4.19 | 4.78 | – | 9.53 | – | |||
| 450 | 18" | 457.2 | 4.19 | 4.78 | – | 9.53 | – | |||
| 500 | 20" | 508 | 4.78 | 5.54 | – | 9.53 | – | |||
| 550 | 22" | 558.8 | 4.78 | 5.54 | – | 9.53 | – | |||
| 600 | 24" | 609.6 | 5.54 | 6.35 | – | 9.53 | – | |||
| 650 | 26" | 660.4 | – | – | – | 9.53 | – | |||
| 700 | 28" | 711.2 | – | – | – | 9.53 | – | |||
| 750 | 30" | 762 | 6.35 | 7.92 | – | 9.53 | – | |||
| 800 | 32" | 812.8 | – | – | 17.48 | 9.53 | – | |||
| 850 | 34" | 863.6 | – | – | 17.48 | 9.53 | – | |||
| 900 | 36" | 914.4 | – | – | 19.05 | 9.53 | – | |||
| 950 | 38" | 965.2 | – | – | - | 9.53 | – | |||
| 1000 | 40" | 1016 | – | – | - | 9.53 | – | |||
| 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 | |
| Standard | Common Grades | Key Features | ||
|---|---|---|---|---|
| ASTM (American Society for Testing and Materials) | ||||
| ASTM A312 | 304, 304L, 316, 316L, 321, 347 | Covers pipes for high-temperature and corrosive environments | ||
| ASTM A358 | 304H, 316H, 317L | Electric-fusion-welded with higher corrosion resistance | ||
| ASTM A790 | 2205 (S31803), 2507 (S32750) | High strength, excellent chloride resistance | ||
| ASTM A269 | 304, 316L | Often used in instrumentation and low-pressure systems | ||
| ASTM A999 | Applies to multiple grades | Specifies testing, tolerances, and certification | ||
| ASME (American Society of Mechanical Engineers) | ||||
| ASME B36.19 | All standard grades | Defines wall thickness (Schedule 5S to 80S) | ||
| ASME SA312 | 304, 316, etc. | Required for boilers, power plants, and high-pressure systems | ||
| EN (European Norm) | ||||
| EN 10216-5 | 1.4301 (304), 1.4404 (316L) | Used in EU for chemical and petrochemical industries | ||
| EN 10217-7 | 1.4307 (304L), 1.4404 (316L) | Covers TIG-welded and laser-welded pipes | ||
| ISO (International Organization for Standardization) | ||||
| ISO 1127 | All grades | Defines metric sizes and wall thickness | ||
| ISO 2037 | 304, 316 | Similar to ASTM A270 but with metric dimensions | ||
| JIS (Japanese Industrial Standards) | ||||
| JIS G3459 | SUS304, SUS316 | Used in Japanese industrial applications | ||
| JIS G3463 | SUS304H, SUS316L | High-temperature and pressure resistance | ||
| Grade | C(max) | Si(max) | P(max) | S(max) | Cr | Ni | Mo | Ti |
|---|---|---|---|---|---|---|---|---|
| TP304/1.4301 | 0.08 | 1 | 0.045 | 0.03 | 18.0-20.0 | 8.0-10.5 | ||
| TP304L/1.4307 | 0.035 | 1 | 0.045 | 0.03 | 18.0-20.0 | 8.0-12.0 | ||
| TP304H/1.4948 | 0.04-0.10 | 1 | 0.045 | 0.03 | 18.0-20.0 | 8.0-12.0 | ||
| TP316/1.4401 | 0.08 | 1 | 0.045 | 0.03 | 16.0-18.0 | 11.0-14.0 | 2.0-3.0 | |
| TP316L/1.4404 | 0.035 | 1 | 0.045 | 0.03 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | |
| TP316Ti/1.4571 | 0.08 | 1 | 0.045 | 0.03 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.7>5x(C+N) |
| TP321/1.4541 | 0.08 | 1 | 0.045 | 0.03 | 17.0-19.0 | 9.0-12.0 | 0.7>5x(C+N) | |
| TP317L/1.4449 | 0.08 | 1 | 0.045 | 0.03 | 18.0-20.0 | 11.0-14.0 | 3.0-4.0 | |
| TP347H/1.4912 | 0.04-0.10 | 1 | 0.045 | 0.03 | 17.0-19.0 | 9.0-13.0 | ||
| TP309S/1.4833 | 0.08 | 1 | 0.045 | 0.03 | 22.0-24.0 | 12.0-15.0 | 0.75 | |
| TP310S/1.4845 | 0.08 | 1 | 0.045 | 0.03 | 24.0-26.0 | 19.0-22.0 | 0.75 |
1, Oil & Gas Industry
Transportation of crude oil, natural gas, and refined products
Offshore platforms and pipelines (resistant to seawater corrosion)
Downhole tubing and casing in harsh environments
2, Chemical & Petrochemical Industry
Acid and chemical transport (resistant to corrosive substances)
Heat exchangers, reactors, and storage tanks
Highpressure and hightemperature applications
3, Food & Beverage Industry
Sanitary tubing for milk, beer, juice, and other liquids
Dairy processing and brewing equipment (easy to clean, nonreactive)
Conveying systems for food production
4, Pharmaceutical & Biotechnology
Highpurity piping for drug manufacturing
Sterile processing and cleanroom applications
Bioreactors and filtration systems
5, Water Treatment & Desalination
Seawater desalination plants (resistant to saltwater corrosion)
Wastewater treatment and distribution systems
Hydraulic and plumbing systems
6, Power Generation
Boiler tubes and steam pipelines in thermal power plants
Nuclear power plant cooling systems
Exhaust systems and heat recovery units
7, Automotive & Aerospace
Exhaust systems (e.g., manifolds, mufflers)
Hydraulic and fuel lines
Aircraft structural components and jet engine parts
8, Construction & Architecture
Structural frameworks and handrails
Underground piping for drainage and HVAC systems
Decorative applications (e.g., facades, bridges)
9, Pulp & Paper Industry
Chemical recovery systems
Bleaching and digesting equipment
Piping for corrosive pulp processing liquids
10, Mining & Mineral Processing
Slurry transport pipelines
Acid leaching systems
Dewatering and tailings management
