Premium Stainless Seamless Pipe
Our Stainless Seamless Pipes offer exceptional durability, corrosion resistance, and high-temperature performance. Extensively utilized across demanding industries including petroleum, chemical, aerospace, and boiler heat exchangers.
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Size Range: Outer Diameter (O.D.): 6mm – 830mm | Wall Thickness (W.T.): 1mm – 40mm.
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Max Length: Up to 18,000mm.
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Standards: ASTM A213, A269, A312, A511, A789, A790, A376, EN 10216-5, EN 10297, DIN 17456, DIN 17458, JIS G3459, JIS GS3463/GS3467, JIS G3448, GOST 9940, GOST 9941.
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Materials Available: Austenitic (TP304/L/H, TP316/L/Ti, TP321, TP347, TP310S), Ferritic & Martensitic (TP410, TP420, TP430), Duplex (S31803, S32205, S32750), and Special Alloys (Alloy 20, 254SMO, 904L).
Description
1. Product Overview & Applications
We provide high-quality Stainless Seamless Pipes manufactured to endure severe environments involving high pressure, extreme temperatures, and highly corrosive media. With no welded seams, these pipes provide superior structural integrity and uniform mechanical properties throughout the entire pipe body.
Major Applications: Widely used in petroleum, chemical industry, chemical fiber, smelting, medical machinery, paper making, heat preservation and refrigeration, mechanical equipment, food, electricity, water conservancy, architecture, aerospace, navigation, seabed exploration, environmental protection, and boiler heat exchangers.
2. General Specifications & Available Materials
- Outside Diameter (O.D.): 6mm – 830mm
- Wall Thickness (W.T.): 1mm – 40mm
- Length: Max. 18000mm
- Executive Standards: ASTM A213, A269, A312, A511, A789, A790, A376; EN 10216-5, EN 10297; DIN 17456, DIN 17458; JIS G3459, JIS GS3463, GS3467, JIS G3448; GOST 9940, GOST 9941.
Material Grades
- Austenitic: TP304, TP304L, TP304H, TP304LN, TP316/TP316L, TP316H, TP316Ti, TP316LN, TP321, TP321H, TP317, TP317L, TP347, TP347H, TP348, TP348H, TP309S, TP310S, TP310H.
- Ferritic & Martensitic: TP405, TP410, TP420, TP430, TP440A, TP440B, TP440C.
- Duplex: S31803, S32205, S32750, S32760.
- Others: Alloy 20, 253MA, 254SMO, AL-6XN, 904L.
3. Dimension Chart (ANSI B36.19 & ANSI B36.10)
| NPS | O.D. (mm) | Nominal Wall Thickness (mm) | |||||
|---|---|---|---|---|---|---|---|
| 5S | 10S | 40S | 80S | 160 | XXS | ||
| 1/8 | 10.29 | 0.89 | 1.24 | 1.73 | 2.41 | – | – |
| 1/4 | 13.72 | 1.24 | 1.65 | 2.24 | 3.02 | – | – |
| 3/8 | 17.15 | 1.24 | 1.65 | 2.31 | 3.20 | – | – |
| 1/2 | 21.34 | 1.65 | 2.11 | 2.77 | 3.73 | 4.78 | 7.47 |
| 3/4 | 26.67 | 1.65 | 2.11 | 2.87 | 3.91 | 5.56 | 7.82 |
| 1 | 33.40 | 1.65 | 2.77 | 3.38 | 4.55 | 6.35 | 9.09 |
| 1 1/4 | 42.16 | 1.65 | 2.77 | 3.56 | 4.85 | 6.35 | 9.70 |
| 1 1/2 | 48.26 | 1.65 | 2.77 | 3.68 | 5.08 | 7.14 | 10.15 |
| 2 | 60.33 | 1.65 | 2.77 | 3.91 | 5.54 | 8.74 | 11.07 |
| 2 1/2 | 73.03 | 2.11 | 3.05 | 5.16 | 7.01 | 9.53 | 14.02 |
| 3 | 88.90 | 2.11 | 3.05 | 5.49 | 7.62 | 11.13 | 15.24 |
| 3 1/2 | 101.60 | 2.11 | 3.05 | 5.74 | 8.08 | – | – |
| 4 | 114.30 | 2.11 | 3.05 | 6.02 | 8.56 | 13.49 | 17.12 |
| 5 | 141.30 | 2.77 | 3.40 | 6.55 | 9.53 | 15.88 | 19.05 |
| 6 | 168.28 | 2.77 | 3.40 | 7.11 | 10.97 | 18.26 | 21.95 |
| 8 | 219.08 | 2.77 | 3.76 | 8.18 | 12.70 | 23.01 | 22.23 |
| 10 | 273.05 | 3.40 | 4.19 | 9.27 | 12.70 | 28.58 | 25.40 |
| 12 | 323.85 | 3.96 | 4.57 | 9.53 | 12.70 | 33.32 | 25.40 |
| 14 | 355.60 | 3.96 | 4.78 | 9.53 | 12.70 | 35.71 | – |
| 16 | 406.40 | 4.19 | 4.78 | 9.53 | 12.70 | 40.49 | – |
| 18 | 457.20 | 4.19 | 4.78 | 9.53 | 12.70 | 45.24 | – |
| 20 | 508.00 | 4.78 | 5.54 | 9.53 | 12.70 | 50.01 | – |
| 24 | 609.60 | 5.54 | 6.35 | 9.53 | 12.70 | 59.54 | – |
4. Chemical Composition & Mechanical Properties
Austenitic Stainless Steels
| Grade | Chemical Composition (%) Max unless range is given | Mechanical Properties (Min) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Ni | Mo / Others | Rm MPa | Rp0.2 MPa | A % | |
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0~20.0 | 8.0~11.0 | – | 515 | 205 | 35 |
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0~20.0 | 8.0~13.0 | – | 485 | 170 | 35 |
| TP304H | 0.04~0.10 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0~20.0 | 8.0~11.0 | – | 515 | 205 | 35 |
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0~18.0 | 11.0~14.0 | Mo: 2.0~3.0 | 515 | 205 | 35 |
| TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0~18.0 | 10.0~14.0 | Mo: 2.0~3.0 | 485 | 170 | 35 |
| TP316Ti | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0~18.0 | 10.0~14.0 | Mo: 2.0~3.0 Ti: 5x(C+N)~0.7 |
515 | 205 | 35 |
| TP321 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0~19.0 | 9.0~12.0 | Ti: 5xC~0.7 | 515 | 205 | 35 |
| TP347 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0~19.0 | 9.0~13.0 | Cb+Ta: 10xC~1.1 | 515 | 205 | 35 |
| TP310S | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 24.0~26.0 | 19.0~22.0 | – | 515 | 205 | 35 |
Ferritic/Martensitic & Duplex Stainless Steels
| Grade | Chemical Composition (%) Max unless range is given | Mechanical Properties (Min) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Ni | Mo / N | Rm MPa | Rp0.2 MPa | A % | |
| Ferritic & Martensitic | |||||||||||
| TP405 | 0.08 | 1.00 | 0.040 | 0.030 | 1.00 | 11.5~14.5 | 0.50 | Al: 0.1~0.3 | 415 | 205 | 20 |
| TP410 | 0.15 | 1.00 | 0.040 | 0.030 | 1.00 | 11.5~13.5 | 0.50 | – | 415 | 205 | 20 |
| TP420 | ≥ 0.15 | 1.00 | 0.040 | 0.030 | 1.00 | 12.0~14.0 | 0.50 | – | 450 | 225 | 20 |
| TP430 | 0.12 | 1.00 | 0.040 | 0.030 | 1.00 | 16.0~18.0 | 0.50 | – | 450 | 240 | 22 |
| Duplex | |||||||||||
| S31803 | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 21.0~23.0 | 4.5~6.5 | Mo: 2.5~3.5 N: 0.08~0.20 |
620 | 450 | 25 |
| S32205 | 0.03 | 2.00 | 0.030 | 0.020 | 1.00 | 22.0~23.0 | 4.5~6.5 | Mo: 3.0~3.5 N: 0.14~0.20 |
655 | 450 | 25 |
| S32750 | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 24.0~26.0 | 6.0~8.0 | Mo: 3.0~5.0 N: 0.24~0.32 Cu: 0.50 |
795 | 550 | 15 |
5. Manufacturing Process
Our stainless seamless pipes are produced under rigorous quality control procedures. The manufacturing flow ensures immaculate internal structure and dimensional accuracy:
Raw Material → Cutting → Heating → Piercing → Sizing → Cooling → Straightening → Cutting → Pickling → Cold Drawing/Rolling → Degreasing → Annealing → Straightening → Cutting → Pickling & Passivation → Inspection (NDT/Hydro/Visual/Dimension) → Marking → Packaging → Delivery.
6. Packing & Delivery
To prevent mechanical damage and contamination during transit, our pipes are meticulously packaged. Small diameter pipes are securely bundled and wrapped with protective plastic layers. For optimal protection, especially for export, products are packed inside robust seaworthy wooden boxes or crates.
