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.
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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