Seamless tube formed into continuous helix
Custom helix diameter (50-1000mm) and pitch
Ideal for immersion heaters, jacketed reactors, and condensers
Stress relieved after forming for dimensional stability
Seamless Stainless Steel Pipe Coils are specifically manufactured for heat exchanger, condenser, and boiler applications. Produced through cold drawing or cold rolling processes without any longitudinal weld seam, these coils offer uniform wall thickness, excellent heat transfer efficiency, and superior resistance to thermal fatigue.
Our coils are available in straight lengths bent into U-shapes, serpentine patterns, or custom helical configurations. They comply with international standards including ASTM A213, ASTM A269, ASME SA213, and EN 10216-5, ensuring reliable performance in shell-and-tube heat exchangers, finned tube coils, and immersion heating systems.
Key Features
- Excellent corrosion resistance in harsh environments
- Superior heat transfer efficiency
- Seamless structure for improved strength and reliability
- High pressure and temperature resistance
- Long service life with minimal maintenance
Specifications
- Outer Diameter: Custom available
- Wall Thickness: As required
- Coil Length: Continuous or custom
- Standard: ASTM A213 / A269 / A312
- Surface Finish: Annealed / Pickled / Polished
Looking for seamless stainless steel pipe coils for heat exchangers?
Hengyi Metal provides high-quality coil tubing with customized sizes and fast delivery.
Contact us today for product details, technical support, and quotations
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
View more stainless steel pipe 310S
Typical Applications by Industry
| Industry | Coil Type | Grade Recommendation |
|---|---|---|
| Chemical Processing | U-bend, Helical | 316L, 904L, 2205 |
| Petrochemical / Refinery | U-bend (API 660) | 321, 347, 316L |
| Power Generation | U-bend, Serpentine | 304H, 316H, 321H |
| HVAC & Refrigeration | Serpentine, Helical | 304, 316L |
| Food & Beverage | Serpentine, Immersion | 304L, 316L (BA finish) |
| Pharmaceutical | U-bend, Helical | 316L (EP finish) |
| Marine / Offshore | U-bend | 2205, 2507, 6Mo |
| Waste Heat Recovery | Serpentine, Helical | 310S, 347H |
| Solar Thermal | Long length coil | 304, 316L |
| ASTM/ASMEGrade | EN Grade | GB Unified Number | Chemical Component % | ||||||||||
| C | Cr | Ni | Mn | P | S | Mo | Si | Cu | N | Other | |||
| 201 | 1.4372 | 1Cr17Mn6Ni5N | ≤0.15 | 16.00-18.00 | 3.50-5.50 | 5.50－7.50 | ≤0.060 | ≤0.030 | – | ≤1.00 | – | ≤0.25 | – |
| 202 | 1.4373 | 1Cr18Mn8Ni5N | ≤0.15 | 17.00-19.00 | 4.00-6.00 | 7.50-10.00 | ≤0.060 | ≤0.030 | ≤1.00 | – | ≤0.25 | － | |
| 301 | 1.4310 | 1Cr17Ni7 | ≤0.15 | 16.00-18.00 | 6.00-8.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.00 | – | 0.1 | – |
| 302 | 1.4325 | 1Cr18Ni9 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.035 | ≤0.030 | – | ≤1.00 | – | – | – |
| 303 | 1.4305 | Y1Cr18Ni9 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.20 | ≥0.15 | – | ≤1.00 | – | – | – |
| 304 | 1.4301 | 0Cr18Ni9 | ≤0.08 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 304L | 1.4307 | 00Cr19Ni10 | ≤0.030 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 304H | 1.4948 | 0Cr18Ni9 | 0.04~0.10 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 309S | 1.4833 | 0Cr23Ni13 | ≤0.08 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 309 | 1.4828 | 0Cr23Ni13 | 0.04~0.10 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 310S | 1.4842 | 0Cr25Ni20 | ≤0.08 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
| 310H | 1.4821 | 0Cr25Ni20 | 0.04~0.10 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
| 314 | 1.4841 | 0Cr25Ni20Si | ≤0.25 | 23.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | 1.5-3.0 | – | – | – |
| 316 | 1.4401 | 0Cr17Ni12Mo2 | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
| 316L | 1.4404 | 00Cr17Ni14Mo2 | ≤0.030 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
| 316H | 1.4436 | 0Cr17Ni12Mo2N | 0.04~0.10 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | 0.10-0.22 | – |
| 316Ti | 1.4571 | 0Cr17Ni12Mo2Ti | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | Ti5(C+N)~0.7 |
| 317 | 1.4445 | 0Cr19Ni13Mo3 | ≤0.08 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤0.75 | – | 0.1 | – |
| 317L | 1.4438 | 00Cr19Ni13Mo3 | ≤0.03 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤0.75 | – | 0.1 | – |
| 321 | 1.4541 | 0Cr18Ni10Ti | ≤0.08 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti5(C+N)~0.7 |
| 321H | 1.4940 | 0Cr18Ni10Ti | 0.04~0.10 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti4(C+N)~0.7 |
| 329 | 1.4480 | 0Cr26Ni5Mo2 | ≤0.08 | 23.00-28.00 | 2.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | 1.00-2.00 | ≤0.75 | – | – | – |
| 329J1 | 1.4480 | 0Cr26Ni5Mo2 | ≤0.08 | 23.00-28.00 | 2.00-5.00 | ≤1.00 | ≤0.045 | ≤0.030 | 1.00-2.00 | ≤0.75 | – | – | – |
| 330 | 1.4864 | N08330 | ≤0.15 | 14.00-17.00 | 33.00-37.00 | ≤2.00 | ≤0.045 | ≤0.040 | 1.00-2.00 | ≤1.5 | – | – | – |
| 347 | 1.4550 | 0Cr18Ni11Nb | ≤0.08 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥10*C%-1.0 |
| 347H | 1.4912 | 0Cr18Ni11Nb | 0.04~0.10 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥8*C%-1.0 |
| 409L | 1.4720 | S40900 | ≤0.03 | 10.50-11.70 | 0.5 | ≤1.00 | ≤0.040 | ≤0.020 | – | ≤1.00 | – | 0.03 | Ti6(C+N)-0.5 Nb0.17 |
| 430 | 1.4016 | S43000 | ≤0.12 | 16.00-18.00 | 0.75 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 436 | 1.4513 | S43600 | ≤0.025 | 16.00-19.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75-1.0 | ≤1.00 | ≤0.025 | Nb+Ti:8(C+N)~0.80 | |
| 439 | 1.4510 | S43035 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti+Nb:0.2+4C~0.75 |
| 441 | 1.4509 | S44100 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti:0.1-0.6 Nb:3C+0.3~1.0 |
| 442 | 1.4741 | S44200 | ≤0.025 | 18.0-23.0 | – | ≤1.00 | ≤0.040 | ≤0.035 | – | ≤1.00 | – | ||
| 443 | S44300 | ≤0.025 | 19.5-22.0 | – | ≤1.00 | ≤0.035 | ≤0.015 | – | ≤1.00 | – | ≤0.025 | Nb+Ti:0.2+4(C+N)~0.75 | |
| 444 | 1.4521 | S44400 | ≤0.025 | 17.00-20.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 1.75-2.5 | ≤1.00 | ≤0.035 | Ti+Nb:0.2+4(C+N)~0.8 | |
| 446 | 1.4749 | S44600 | ≤0.2 | 23.0-27.0 | 0.75 | ≤1.50 | ≤0.040 | ≤0.030 | – | ≤1.00 | 0.25 | ||
| 410 | 1.4006 | 1Cr13 | 0.08~0.15 | 11.50-13.50 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 420 | 1.4031 | 2Cr13 | ≥0.15 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 420J2 | 1.4028 | 3Cr13 | 0.26-0.35 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| S42040 | 1.4034 | 4Cr13 | 0.36-0.45 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 431 | 1.4057 | 1Cr17Ni2 | ≤0.2 | 15.00-17.00 | 1.25-2.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 440A | 1.4040 | 7Cr17 | 0.60-0.75 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 440B | 1.4041 | 8Cr17 | 0.75-0.95 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 440C | 1.4023 | 11Cr17 | 0.95-1.20 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 17-4PH | 1.4542 | 630 | ≤0.07 | 15.50-17.50 | 3.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | 3.00-5.00 | – | Nb+Ta:0.15-0.45 |
| 17-7PH | 1.4568 | 631 | ≤0.09 | 16.00-18.00 | 6.50-7.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | Al 0.75-1.50 |
| 15-5PH | 1.4545 | S15500 | ≤0.09 | 14.00-15.50 | 3.50-5.50 | ≤1.00 | ≤0.040 | ≤0.030 | 2.00-3.00 | ≤1.00 | 2.50-4.50 | – | |
| 416 | 1.4005 | Y1Cr13 | ≤0.15 | 12.00-14.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 420F | 1.4029 | Y3Cr13 | 0.3-0.40 | 12.00-14.00 | 0.5 | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | 0.6 | – | – |
| 430F | 1.4019,1.4104 | Y1Cr17 | ≤0.12 | 16.00-18.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 440F | 1.4025 | Y11Cr17 | 0.95-1.20 | 16.00-18.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 303 | 1.4305 | S30317 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.20 | ≥0.15 | – | ||||
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