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Forever Steel supplies seamless stainless steel pipe for chemical processing, heat exchange, water treatment, food, pharmaceutical and general industrial piping. Listed grades include 304/304L, 316/316L, 321, 347H, 310S and duplex S31803/S32205; confirm standard, grade, OD/wall, surface, length, tests and documents.
Our production line covers a vast range of dimensions to meet the precise requirements of global engineering projects:
Outside Diameter (OD):6mm to 762mm (1/4" to 30")
Wall Thickness (WT):0.5mm to 65mm (SCH 5S to SCH XXS)
Length: 5.8m, 6m, 11.8m, 12m, or customized up to 20m.
Manufacturing Processes:Cold Drawn, Cold Rolled, Precision Rolled, and Hot Rolled.
Surface Finishes:Pickled & Annealed, Bright Annealing (BA), and Polished (Mirror/Satin).
We strictly adhere to international quality benchmarks, providing Material Test Certificates (MTC)according to EN 10204 3.1/3.2 for every shipment.
Seamless Stainless Steel Pipe Specifications and Size Range
|
Standard |
Dimension |
Steel Grade |
|
ASTM A312 |
OD:
1/4"-20" |
TP304, TP304L,
TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, |
|
ASTM A213 |
OD: 6.0-50.8mm |
TP304, TP304L,
TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, |
|
ASTM A269 |
OD: 6.0-50.8mm |
TP304, TP304L,
TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, |
|
ASTM A789 |
OD: 19.0-60.5mm |
S31803, S32205, S32750,S32760 |
|
ASTM A790 |
OD:
3/4"-10" |
S31803, S32205, S32750,S32760 |
|
EN 10216 |
OD: 6.0-530.0mm |
1.4301, 1.4307,
1.4541, 1.4401, 1.4404, |
Our seamless tubes are the preferred choice for critical fluid transportation and heat exchange in:
Energy & Power:Boilers, superheaters, heat exchangers, and renewable energy.
Oil & Gas:Offshore engineering, ship building, and petrochemical refineries.
Industrial Processing:Chemical, mining, water treatment, and paper industries.
Precision Engineering:Aviation, pharmaceutical, and high-purity sanitary systems.
Infrastructure:Construction, HVAC systems, and marine engineering.
We ensure zero-damage delivery to international markets (Middle East, Southeast Asia, Africa, and beyond).
Protection:Plastic caps plugged on both ends; anti-rust oil or protective coating applied。
Wrapping:Waterproof paper or woven bags wrapped for maritime protection.
Bundling:Secure hexagonal bundles for safe crane handling and container loading.
· ASTM A312 vs A269 vs A213: Stainless Steel Pipe Selection Guide
· ASTM A312 TP304 vs TP316: Metallurgical Differences, Pitting Resistance and Sensitization Risk
· Pickled vs Bright Annealed vs Polished Stainless Steel Pipe: Finish Selection Guide
· Chemical Plant Process Piping: MTC, NDT and Coating Checks
· Raw Material and Heat Number Traceability for Steel Pipes
Material verification: Stainless Steel PMI Testing and XRF Limits for 304L and 316L.
Surface acceptance: Stainless Steel Pipe Pickling and Passivation: Heat Tint and Free Iron.
Heat exchanger tube selection: ASTM A213 vs A249 for Stainless Steel Heat Exchanger Tubes.
Compare the available product routes in our stainless steel pipe range.
| Grade | UNS No. | C | Mn | P | S | Si | Cr | Ni | Mo | Other |
| TP304 | S30400 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18.0-20.0 | 8.0-11.0 | - | - |
| TP304L | S30403 | 0.035 | 2 | 0.045 | 0.03 | 1 | 18.0-20.0 | 8.0-12.0 | - | - |
| TP316 | S31600 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16.0-18.0 | 11.0-14.0 | 2.0-3.0 | - |
| TP316L | S31603 | 0.035 | 2 | 0.045 | 0.03 | 1 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | - |
| TP321 | S32100 | 0.08 | 2 | 0.045 | 0.03 | 1 | 17.0-19.0 | 9.0-12.0 | - | Ti: 5x(C+N)-0.70 |
| TP347 | S34700 | 0.08 | 2 | 0.045 | 0.03 | 1 | 17.0-19.0 | 9.0-13.0 | - | Cb+Ta: 10xC-1.10 |
| TP310S | S31008 | 0.08 | 2 | 0.045 | 0.03 | 1 | 24.0-26.0 | 19.0-22.0 | - | - |
| NPS Designator | Outside Diameter | Nominal Wall Thickness | ||||||||
| in. | mm | Schedule 5SA (in.) | Schedule 5SA (mm) | Schedule 10SA (in.) | Schedule 10SA (mm) | Schedule 40S (in.) | Schedule 40S (mm) | Schedule 80S (in.) | Schedule 80S (mm) | |
| 1/8 | 0.405 | 10.29 | ... | ... | 0.049 | 1.24 | 0.068 | 1.73 | 0.095 | 2.41 |
| 1/4 | 0.54 | 13.72 | ... | ... | 0.065 | 1.65 | 0.088 | 2.24 | 0.119 | 3.02 |
| 3/8 | 0.675 | 17.15 | ... | ... | 0.065 | 1.65 | 0.091 | 2.31 | 0.126 | 3.2 |
| 1/2 | 0.84 | 21.34 | 0.065 | 1.65 | 0.083 | 2.11 | 0.109 | 2.77 | 0.147 | 3.73 |
| 3/4 | 1.05 | 26.67 | 0.065 | 1.65 | 0.083 | 2.11 | 0.113 | 2.87 | 0.154 | 3.91 |
| 1 | 1.315 | 33.4 | 0.065 | 1.65 | 0.109 | 2.77 | 0.133 | 3.38 | 0.179 | 4.55 |
| 1 1/2 | 1.66 | 42.16 | 0.065 | 1.65 | 0.109 | 2.77 | 0.14 | 3.56 | 0.191 | 4.85 |
| 1 1/4 | 1.9 | 48.26 | 0.065 | 1.65 | 0.109 | 2.77 | 0.145 | 3.68 | 0.2 | 5.08 |
| 2 | 2.375 | 60.33 | 0.065 | 1.65 | 0.109 | 2.77 | 0.154 | 3.91 | 0.218 | 5.54 |
| 2 1/2 | 2.875 | 73.03 | 0.083 | 2.11 | 0.12 | 3.05 | 0.203 | 5.16 | 0.276 | 7.01 |
| 3 | 3.5 | 88.9 | 0.083 | 2.11 | 0.12 | 3.05 | 0.216 | 5.49 | 0.3 | 7.62 |
| 3 1/2 | 4 | 101.6 | 0.083 | 2.11 | 0.12 | 3.05 | 0.226 | 5.74 | 0.318 | 8.08 |
| 4 | 4.5 | 114.3 | 0.083 | 2.11 | 0.12 | 3.05 | 0.237 | 6.02 | 0.337 | 8.56 |
| 5 | 5.563 | 141.3 | 0.109 | 2.77 | 0.134 | 3.4 | 0.258 | 6.55 | 0.375 | 9.52 |
| 6 | 6.625 | 168.28 | 0.109 | 2.77 | 0.134 | 3.4 | 0.28 | 7.11 | 0.432 | 10.97 |
| 8 | 8.625 | 219.08 | 0.109 | 2.77 | 0.148 | 3.76 | 0.322 | 8.18 | 0.5 | 12.7 |
| 10 | 10.75 | 273.05 | 0.134 | 3.4 | 0.165 | 4.19 | 0.365 | 9.27 | 0.5 | 12.7 |
| 12 | 12.75 | 323.85 | 0.156 | 3.96 | 0.18 | 4.57 | 0.375 | 9.52 | 0.5 | 12.7 |
| 14 | 14 | 355.6 | 0.156 | 3.96 | 0.188 | 4.78 | ... | ... | ... | ... |
| 16 | 16 | 406.4 | 0.165 | 4.19 | 0.188 | 4.78 | ... | ... | ... | ... |
| 18 | 18 | 457.2 | 0.165 | 4.19 | 0.188 | 4.78 | ... | ... | ... | ... |
| 20 | 20 | 508 | 0.188 | 4.78 | 0.218 | 5.54 | ... | ... | ... | ... |
| 22 | 22 | 558.8 | 0.188 | 4.78 | 0.218 | 5.54 | ... | ... | ... | ... |
| 24 | 24 | 609.6 | 0.218 | 5.54 | 0.25 | 6.35 | ... | ... | ... | ... |
| 30 | 30 | 762 | 0.25 | 6.35 | 0.312 | 7.92 | ... | ... | ... | ... |
| Standard | Out diameter (mm) | Wall thickness (mm) | Length (mm) | |
| ASTM A312 | ≤48.26 | +0.4 | +(Unspecified)-12.50% | Definite cut length+6.40-0 |
| -0.8 | ||||
| >48.26~114.30 | +0.8 | |||
| -0.8 | ||||
| >114.30~219.08 | +1.6 | |||
| -0.8 | ||||
| >219.08~457.20 | +2.4/-0.8 | |||
| >457~660 | +3.2 | |||
| -0.8 | ||||
| >660~864 | +4 | |||
| -0.8 | ||||
| >864~1219 | +4.48 | |||
| -0.8 | ||||
| Size (inch) | OD (mm) | 10 SWG (3.2mm) | 12 SWG (2.6mm) | 14 SWG (2.1mm) | 16 SWG (1.65mm) | 18 SWG (1.2mm) |
| Unit | - | Weight/Mtr | Weight/Mtr | Weight/Mtr | Weight/Mtr | Weight/Mtr |
| 1/2" | 12.7 | 0.754 | 0.651 | 0.552 | 0.452 | 0.342 |
| 3/4" | 19.05 | 1.258 | 1.061 | 0.883 | 0.712 | 0.531 |
| 1" | 25.4 | 1.762 | 1.47 | 1.214 | 0.972 | 0.72 |
| 1 1/2" | 38.1 | 2.77 | 2.289 | 1.875 | 1.492 | 1.098 |
| 2" | 50.8 | 3.778 | 3.108 | 2.537 | 2.012 | 1.476 |
| 3" | 76.2 | 5.794 | 4.747 | 3.86 | 3.051 | 2.232 |
| 4" | 101.6 | 7.81 | 6.385 | 5.183 | 4.091 | 2.988 |
We provide a wide range of Seamless Stainless Steel Pipes in accordance with ASTM A312 and EN 10216-5 standards, specializing in popular grades such as 304/304L and 316/316L to meet various industrial requirements.
Every pipe undergoes strict Internal Quality Control, including chemical composition analysis and intergranular corrosion testing, to ensure the material performs reliably in high-acid or saline environments.
Yes, all shipments are delivered with a Mill Test Certificate (MTC) according to EN 10204 3.1, detailing the precise mechanical properties and chemical heat analysis of the steel.
We use sea-worthy packaging, including individual plastic wrapping or wooden crates and plastic pipe-end protectors, to ensure the stainless steel surfaces remain free from scratches and contamination during transit.
