China Stainless Steel
stainless steel
coil tube
TeCarve’s Stainless Steel Helical Coil Tube is designed for superior flexibility, durability, and efficiency in heat transfer and fluid systems. Manufactured with precision coiling technology, our tubes offer continuous length, smooth internal surfaces, and excellent corrosion resistance, making them ideal for critical industrial and sanitary applications.
These coil tubes reduce welding joints, minimize leakage risks, and ensure long-lasting performance under high pressure and temperature conditions. Available in a wide range of grades such as 304, 316L, and 321, they meet the diverse needs of chemical, food & beverage, pharmaceutical, and marine industries.
With strict dimensional tolerances, advanced testing, and compliance with ASTM, EN, JIS, and GB standards, TeCarve delivers helical coil tubes that combine reliability, efficiency, and global-standard quality.
Specifications
Available Sizes by Standard
Markets: N. America — seamless small-diameter helical coil tube (heat exchanger/instrumentation)
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.59 | 0.20 | +0.10mm / −0.11mm | ±10.0% |
| 3.18 | 0.35 | +0.10mm / −0.11mm | ±10.0% |
| 6.35 | 0.71 | +0.10mm / −0.11mm | ±10.0% |
| 9.53 | 0.89 | +0.10mm / −0.11mm | ±10.0% |
| 12.70 | 1.24 | +0.10mm / −0.11mm | ±10.0% |
| 19.05 | 1.65 | +0.10mm / −0.11mm | ±10.0% |
| 25.40 | 2.11 | ±0.15mm | ±10.0% |
OD tolerance per ASTM A1016/A1016M Table 3 (welded & cold-finished seamless tubes). Wall thickness tolerance per ASTM A213/A213M §13.2 (cold-formed, ±10% of specified wall).
- Supply Length / Form: Pre-formed helical coils to specified coil OD/pitch/turns, or continuous coil stock
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, duplex 2205, 904L, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A213/A269/A632, EN 10216-5/10217-7, JIS G3448/G3463, or GB/T general tolerance tables
Markets: N. America — small-diameter seamless & welded corrosion-resisting helical coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.59 | 0.20 | ±0.13mm | ±15.0% |
| 3.18 | 0.35 | ±0.13mm | ±15.0% |
| 6.35 | 0.71 | ±0.13mm | ±15.0% |
| 9.53 | 0.89 | ±0.13mm | ±15.0% |
| 12.70 | 1.24 | ±0.13mm | ±15.0% |
| 19.05 | 1.65 | ±0.13mm | ±10.0% |
| 25.40 | 1.65 | ±0.13mm | ±10.0% |
Per ASTM A269/A269M Table 4 (self-contained — not A1016-derived). Group 1 (OD ≤12.7mm): ±0.13mm / ±15% wall. Group 2 (12.7–38.1mm): ±0.13mm / ±10% wall.
- Supply Length / Form: Pre-formed helical coils to specified coil OD/pitch/turns, or continuous coil stock
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, duplex 2205, 904L, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A213/A269/A632, EN 10216-5/10217-7, JIS G3448/G3463, or GB/T general tolerance tables
Markets: Europe, Middle East — small-diameter precision helical coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 4.0 | 0.5 | ±0.10mm (±2.5%) | ±0.06mm (±12.5%) |
| 6.0 | 1.0 | ±0.15mm (±2.5%) | ±0.13mm (±12.5%) |
| 10.0 | 1.5 | ±0.15mm (±1.5%) | ±0.19mm (±12.5%) |
| 14.0 | 1.5 | ±0.15mm (±1.1%) | ±0.19mm (±12.5%) |
| 21.3 | 2.3 | ±0.20mm (±0.9%) | ±0.29mm (±12.5%) |
- Supply Length / Form: Pre-formed helical coils to specified coil OD/pitch/turns, or continuous coil stock
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, duplex 2205, 904L, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A213/A269/A632, EN 10216-5/10217-7, JIS G3448/G3463, or GB/T general tolerance tables
Markets: Japan, Southeast Asia — small-diameter boiler/instrumentation helical coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6.0 | 1.0 | ±0.30mm (±5.0%) | ±0.13mm (±12.5%) |
| 10.0 | 1.2 | ±0.30mm (±3.0%) | ±0.15mm (±12.5%) |
| 12.7 | 1.65 | ±0.30mm (±2.4%) | ±0.21mm (±12.5%) |
| 21.7 | 2.0 | ±0.40mm (±1.8%) | ±0.25mm (±12.5%) |
- Supply Length / Form: Pre-formed helical coils to specified coil OD/pitch/turns, or continuous coil stock
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, duplex 2205, 904L, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A213/A269/A632, EN 10216-5/10217-7, JIS G3448/G3463, or GB/T general tolerance tables
Markets: China domestic & Belt-and-Road — small-diameter precision helical coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6 | 1.0 | ±0.10mm (±1.7%) | ±0.13mm (±12.5%) |
| 10 | 1.5 | ±0.10mm (±1.0%) | ±0.19mm (±12.5%) |
| 14 | 2.0 | ±0.14mm (±1.0%) | ±0.25mm (±12.5%) |
| 20 | 2.5 | ±0.20mm (±1.0%) | ±0.31mm (±12.5%) |
| 25 | 2.5 | ±0.25mm (±1.0%) | ±0.31mm (±12.5%) |
- Supply Length / Form: Pre-formed helical coils to specified coil OD/pitch/turns, or continuous coil stock
- Available Grades: 304, 304L, 316, 316L, 321, 409, 410, 430, duplex 2205, 904L, etc.
- Surface Finish: Annealed & pickled, polished, bright annealed, or as requested
- Tolerance Compliance: Per ASTM A213/A269/A632, EN 10216-5/10217-7, JIS G3448/G3463, or GB/T general tolerance tables
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2205 Duplex* | S32205 | 1.4462 | SUS329J3L* | 022Cr23Ni5Mo3N* | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 655 MPa (95 ksi) | 450 MPa (65 ksi) | 25% | ≤31 HRC / ≤293 HB |
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 409 | S40900 | 1.4512 | SUS409 | 022Cr12Ti | 0.03 | 1.00 | 1.00 | 0.040 | 0.020 | 10.5-11.75 | — | — | 380 MPa (55 ksi) | 205 MPa (30 ksi) | 20% | ≤88 HRB / ≤190 HV |
| 410 | S41000 | 1.4006 | SUS410 | 12Cr13 | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | 11.5-13.5 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 20% | ≤96 HRB / ≤210 HV |
| 430 | S43000 | 1.4016 | SUS430 | 10Cr17 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 22% | ≤89 HRB / ≤200 HV |
| 904L* | N08904 | 1.4539 | N/A | 015Cr20Ni18Mo6CuN* | 0.020 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% | ≤90 HRB / ≤200 HV |
- Standards Conformance: ASTM A213/A269/A632 · EN 10216-5/10217-7 · DIN 17458 · JIS G3448/G3463 · GB/T 13296/14976
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
- Cross-Reference Note: 2205 duplex and 904L JIS/GB cross-reference figures are compiled from secondary industry sources — please confirm exact specification and heat-specific mill test certificate with TeCarve for critical applications.
Features
• Continuous coil length, fewer joints
• High flexibility and easy installation
• Excellent corrosion and pressure resistance
• Smooth internal bore for fluid and gas flow
• Heat exchangers and condensers
• Instrumentation and control lines
• Food and pharmaceutical fluid transfer
Applications
For specialized helical and spiral coil tubing, see how customers can verify our CNC bending accuracy, ovality control, post-bending annealing, and pressure-test records.
Quality Control
• Raw material traceability with mill certificates
• Eddy current and hydrostatic testing
• Precise dimensional inspection and ovality control
• Surface roughness and corrosion resistance checks
• Third-party inspection available upon request
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Helical Coil Tube Production & Shipping Photos
Real factory, inspection, packaging and loading photos from TeCarve gallery pages.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We customize stainless steel helical coil tube by outer diameter, wall thickness, continuous coil length, seamless or welded construction, grade, and annealed, pickled, polished, mirror, or satin finish.
Low MOQ & Rapid Prototyping
Small batch customization and sample production are supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
Most orders ship within 10–25 days after deposit. Exact timing depends on product specification, required documentation, and order volume.
Global Logistics & On-Time Delivery
For helical coil tube exports to over 50 countries, PVC wrapping and anti-corrosion and moisture protection safeguard the coil, with seaworthy pallets supporting secure handling.
Frequently Asked Questions
What is a stainless steel helical coil tube?
A helical coil tube is a stainless steel tube wound into a tight helical (spring-like) coil. When immersed in a tank or vessel, it provides a large heat transfer surface in a compact footprint. The helical geometry creates secondary Dean vortex flow that can improve heat transfer by 30–50% over straight tubes of equal length.
What coil dimensions does TeCarve supply for helical coil tubes?
Helical coil tubes are custom-manufactured to customer specifications: tube OD from 1.6 mm to 25.4 mm, wall thickness from 0.3 mm to 3 mm, and continuous coil lengths up to 1500 meters where applicable. Coil geometry is designed to customer thermal calculations and vessel drawings. Both seamless and welded tube construction are offered.
What grades are used for stainless steel helical coil tubes?
Available in grades 304, 316L, 316, 321, 904L, and duplex 2205/2507. Grade 316L is standard for chemical reactors, pharmaceutical tanks, and brewery vessels. Grade 904L and super duplex 2507 are used in concentrated acid and high-chloride environments.
How are inlet and outlet connections made on helical coil tubes?
Coil inlets and outlets are straight tube extensions terminating in ANSI/DIN flanges, NPT/BSP threaded connections, or tri-clamp sanitary ends. Connection configuration and nozzle orientation are designed to customer piping arrangement drawings.
What industries use stainless steel helical coil tubes?
Helical coil tubes are used in chemical reactors, pharmaceutical fermenters and bioreactors, food and dairy processing tanks, breweries, oil & gas heat exchangers, geothermal heating systems, and any application requiring compact immersion heating or cooling within a tank or vessel.