stainless steel
coiled tube
TeCarve’s Stainless Steel Coiled Tube offers a space-saving, continuous-length tubing solution with exceptional flexibility and corrosion resistance.
Ideal for instrumentation, heat tracing, fluid and gas transmission, and hydraulic control lines, these coils minimize connection points, reducing leakage risks and enhancing flow efficiency. Manufactured from high-grade stainless steel, each coil undergoes precise cold drawing and annealing to ensure dimensional consistency and mechanical strength.
Available in both seamless and welded forms, TeCarve’s coils are delivered in customized lengths and finishes to match the most demanding industrial applications.
For custom coil lengths, dimensions, and production coordination, see our custom stainless steel tube fabrication service.
Continuous Stainless Steel Coiled Tubing: Seamless & Welded
High-pressure seamless and welded coiled tubing per ASTM A269 and ASTM A213 in grades 304, 304L, 316, and 316L from our partner factories.
Specifications
Available Sizes by Standard Matrix
Markets: N. America — small-diameter seamless & welded tube, joint-free coil supply
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 0.80 | 0.15 | ±0.13mm | ±15% |
| 1.59 | 0.20 | ±0.13mm | ±15% |
| 3.18 | 0.35 | ±0.13mm | ±15% |
| 4.76 | 0.49 | ±0.13mm | ±15% |
| 6.35 | 0.71 | ±0.13mm | ±15% |
| 9.53 | 0.89 | ±0.13mm | ±15% |
| 12.70 | 1.24 | ±0.13mm | ±15% |
| 15.88 | 1.65 | ±0.13mm | ±10% |
| 19.05 | 1.65 | ±0.13mm | ±10% |
- Supply Length / Form: Joint-free continuous coils up to 1,500 m, or custom cut lengths on wooden/steel reels
- Available Grades: 304, 304L, 316, 316L, 321, 904L, Duplex 2205 (S31803 / S32205), Incoloy 825
- Surface Execution: BA (Ra ≤ 0.4μm / 16μin), AP, or passivated
- Dimensional Limits: ASTM A269 Table 4, ASTM A1016, EN 10216-5 Class D4/T3-T4, JIS G3463, GB/T 13296
Markets: N. America — seamless heat exchanger & instrumentation coil tube
| OD (mm) | BWG | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|---|
| 6.35 | 20 | 0.89 | ±0.10mm | ±10% |
| 9.53 | 18 | 1.24 | ±0.10mm | ±10% |
| 12.70 | 16 | 1.65 | ±0.10mm | ±10% |
| 15.88 | 16 | 1.65 | ±0.10mm | ±10% |
| 19.05 | 16 | 1.65 | ±0.10mm | ±10% |
| 22.23 | 16 | 1.65 | ±0.10mm | ±10% |
| 25.40 | 14 | 2.11 | ±0.15mm | ±10% |
- Supply Length / Form: Joint-free continuous coils up to 1,500 m, or custom cut lengths on wooden/steel reels
- Available Grades: 304, 304L, 316, 316L, 321, 904L, Duplex 2205 (S31803 / S32205), Incoloy 825
- Surface Execution: BA (Ra ≤ 0.4μm / 16μin), AP, or passivated
- Dimensional Limits: ASTM A269 Table 4, ASTM A1016, EN 10216-5 Class D4/T3-T4, JIS G3463, GB/T 13296
Markets: Europe, Middle East — small-diameter precision & instrumentation coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6.0 | 1.0 | ±0.15mm (±2.5%) | ±0.13mm (±12.5%) |
| 8.0 | 1.0 | ±0.15mm (±1.9%) | ±0.13mm (±12.5%) |
| 10.0 | 1.5 | ±0.15mm (±1.5%) | ±0.19mm (±12.5%) |
| 12.0 | 1.5 | ±0.15mm (±1.3%) | ±0.19mm (±12.5%) |
| 14.0 | 1.5 | ±0.15mm (±1.1%) | ±0.19mm (±12.5%) |
| 17.2 | 2.0 | ±0.20mm (±1.2%) | ±0.25mm (±12.5%) |
| 21.3 | 2.3 | ±0.20mm (±0.9%) | ±0.29mm (±12.5%) |
- Supply Length / Form: Joint-free continuous coils up to 1,500 m, or custom cut lengths on wooden/steel reels
- Available Grades: 304, 304L, 316, 316L, 321, 904L, Duplex 2205 (S31803 / S32205), Incoloy 825
- Surface Execution: BA (Ra ≤ 0.4μm / 16μin), AP, or passivated
- Dimensional Limits: ASTM A269 Table 4, ASTM A1016, EN 10216-5 Class D4/T3-T4, JIS G3463, GB/T 13296
Markets: Japan, Southeast Asia — small-diameter boiler/instrumentation coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6.0 | 1.0 | ±0.30mm (±5.0%) | ±0.13mm (±12.5%) |
| 8.0 | 1.0 | ±0.30mm (±3.8%) | ±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%) |
| 17.3 | 1.65 | ±0.30mm (±1.7%) | ±0.21mm (±12.5%) |
| 21.7 | 2.0 | ±0.40mm (±1.8%) | ±0.25mm (±12.5%) |
- Supply Length / Form: Joint-free continuous coils up to 1,500 m, or custom cut lengths on wooden/steel reels
- Available Grades: 304, 304L, 316, 316L, 321, 904L, Duplex 2205 (S31803 / S32205), Incoloy 825
- Surface Execution: BA (Ra ≤ 0.4μm / 16μin), AP, or passivated
- Dimensional Limits: ASTM A269 Table 4, ASTM A1016, EN 10216-5 Class D4/T3-T4, JIS G3463, GB/T 13296
Markets: China domestic & Belt-and-Road — small-diameter precision coil tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6 | 1.0 | ±0.10mm (±1.7%) | ±0.13mm (±12.5%) |
| 8 | 1.0 | ±0.10mm (±1.3%) | ±0.13mm (±12.5%) |
| 10 | 1.5 | ±0.10mm (±1.0%) | ±0.19mm (±12.5%) |
| 12 | 1.5 | ±0.12mm (±1.0%) | ±0.19mm (±12.5%) |
| 14 | 2.0 | ±0.14mm (±1.0%) | ±0.25mm (±12.5%) |
| 18 | 2.0 | ±0.18mm (±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: Joint-free continuous coils up to 1,500 m, or custom cut lengths on wooden/steel reels
- Available Grades: 304, 304L, 316, 316L, 321, 904L, Duplex 2205 (S31803 / S32205), Incoloy 825
- Surface Execution: BA (Ra ≤ 0.4μm / 16μin), AP, or passivated
- Dimensional Limits: ASTM A269 Table 4, ASTM A1016, EN 10216-5 Class D4/T3-T4, JIS G3463, GB/T 13296
Continuous Spool Length & Weight Matrix (Joint-Free Supply)
Engineering reference for continuous, joint-free redraw coiled tubing spools on standard export wooden and steel reels. Eliminates intermediate mechanical fittings and orbital field welds:
| Tube OD (in / mm) | Nominal WT (mm) | Unit Weight (kg/m) | Standard Spool Length | Max Continuous Length | Typical Spool Weight | Reel Dimensions (OD×W×Core) |
|---|---|---|---|---|---|---|
| 1/8" (3.18 mm) | 0.89 mm (0.035") | 0.051 kg/m | 1,000 m (3,280 ft) | Up to 1,500 m (4,920 ft) | 51 – 77 kg | 800 × 400 × 300 mm |
| 1/4" (6.35 mm) | 0.89 mm (0.035") | 0.121 kg/m | 800 – 1,000 m | Up to 1,200 m (3,940 ft) | 97 – 145 kg | 1,000 × 500 × 400 mm |
| 1/4" (6.35 mm) | 1.24 mm (0.049") | 0.158 kg/m | 800 m (2,620 ft) | Up to 1,000 m (3,280 ft) | 126 – 158 kg | 1,000 × 500 × 400 mm |
| 5/16" (7.94 mm) | 0.89 mm (0.035") | 0.156 kg/m | 800 m (2,620 ft) | Up to 1,000 m (3,280 ft) | 125 – 156 kg | 1,000 × 500 × 400 mm |
| 3/8" (9.53 mm) | 0.89 mm (0.035") | 0.192 kg/m | 600 – 750 m | Up to 800 m (2,620 ft) | 115 – 154 kg | 1,100 × 550 × 450 mm |
| 3/8" (9.53 mm) | 1.24 mm (0.049") | 0.256 kg/m | 500 – 600 m | Up to 650 m (2,130 ft) | 128 – 166 kg | 1,100 × 550 × 450 mm |
| 1/2" (12.70 mm) | 0.89 mm (0.035") | 0.262 kg/m | 450 – 550 m | Up to 600 m (1,970 ft) | 118 – 157 kg | 1,200 × 600 × 500 mm |
| 1/2" (12.70 mm) | 1.24 mm (0.049") | 0.354 kg/m | 350 – 450 m | Up to 500 m (1,640 ft) | 124 – 177 kg | 1,200 × 600 × 500 mm |
| 1/2" (12.70 mm) | 1.65 mm (0.065") | 0.455 kg/m | 300 – 350 m | Up to 400 m (1,310 ft) | 136 – 182 kg | 1,200 × 600 × 500 mm |
| 3/4" (19.05 mm) | 1.65 mm (0.065") | 0.716 kg/m | 200 – 250 m | Up to 300 m (980 ft) | 143 – 215 kg | 1,200 × 600 × 500 mm |
W (kg/m) = π × (OD - WT) × WT × ρ = (OD - WT) × WT × 0.02491 (for 304/316L alloys, ρ = 7.93 g/cm³; for Duplex 2205, ρ = 7.82 g/cm³, factor 0.986).Bright Annealed (BA) Atmosphere Metallurgy & Bore Cleanliness
Continuous protective muffle atmosphere heat treatment delivering scale-free metallic luster and ultra-clean bore surfaces for analytical instrumentation and offshore hydraulic service:
100% Pure H&sub2; / N&sub2;-H&sub2; Protective Atmosphere
Continuous in-line muffle furnace under pure hydrogen (100% H&sub2;) or cracked ammonia (75% H&sub2; + 25% N&sub2;) with ultra-dry dew point ≤ −50°C to −65°C (residual O&sub2; < 5 ppm, moisture < 10 ppm). Annealed at 1,040°C–1,150°C (1,900°F–2,100°F) followed by accelerated inert gas cooling through the 450°C–850°C sensitization zone to ensure zero chromium carbide precipitation per ASTM A262 Practice E.
Scale-Free Mirror Luster (Ra ≤ 0.4μm / 16μin)
Delivers an oxide-free, silvery reflective metallic finish without acid pickling, eliminating chemical pitting risks. Internal bore micro-roughness is maintained at Ra ≤ 0.4μm (16μin) for standard instrumentation grade, down to Ra ≤ 0.25μm (10μin) with precision drawn and passivated finishes, minimizing particle entrapment and gas adsorption.
ASTM A632 S3 & ASTM G93 Level A Degreasing
Multi-stage ultrasonic degreasing and heated deionized water flushing (18 MΩ·cm) removes all drawing lubricants. Internal bore is purged with filtered dry nitrogen (dew point ≤ −60°C), certified for residual non-volatile hydrocarbons < 1.0 mg/m². Coil ends are sealed with heavy-duty polyethylene push-in caps and heat-shrink wrap to preserve cleanliness during shipping.
Pressure Containment & 100% Factory Verification Standards
Proof pressure containment and pneumatic verification per ASTM A269 / A213 (general requirements ASTM A1016):
Per ASME B31.3 Table IX-1: 1/4" × 0.035" rated up to 5,100 psi (350 bar); 1/4" × 0.049" rated up to 7,500 psi (517 bar); 3/8" × 0.049" rated up to 4,800 psi (330 bar) working pressure under ambient operating conditions with safety factor = 4.
100% continuous coils undergo hydrostatic proof pressure testing held for 5–10 seconds with no pressure drop or leakage observed during the hold, followed by full-body eddy current testing per ASTM E426 with EDM calibration notches.
Spools undergo 100% pneumatic underwater bubble leak testing with 0.7–1.0 MPa (100–150 psi) dry nitrogen while submerged in illuminated test reservoirs for 15–30 seconds to check for through-wall leaks.
Direct Product Hub: Complementary Heat Transfer & Tubing Lines
Source matching stainless steel and nickel alloy tubing solutions with full EN 10204 3.1 mill traceability:
Stainless Steel Helical Coil Tube
Custom helical coils engineered for immersion coolers, jacketed tanks, and vaporizers with strict R/D ≥ 2.5D bend radius and ovality ≤ 6.0% control.
Heat Exchanger Pipe & Tube
Straight and U-bent tubes per ASTM A213 / A249 / A688 with localized solution annealing, precision dimensional limits, and 100% NDT inspection.
Stainless Steel Capillary Tube
Small-diameter micro tubing with ultra-tight tolerance (±0.02mm), burr-free electrochemical cutting, and bright annealed mirror finishes.
HVAC & Heat Exchangers Hub
Engineering specifications for U-bent tube stress-relief annealing, close-fit tubesheet expansion tolerances, and 100% NDT inspection.
For controlled coil geometry and heat-exchanger duty, compare with our Stainless Steel Helical Coil Tube.
Get Your Coiled Tubing Quote
Sourcing continuous, seamless or welded coiled tubing for chemical injection lines, control lines, subsea umbilical bundles, or heat exchangers? Contact our sales engineering desk for continuous length coils without orbital welds, pressure ratings, and trial orders (100–300 kg MOQ supported).
Continuous single coils up to thousands of meters, eliminating intermediate orbital fittings and leak points.
Short coiled tube samples provided for coil unwinding tests, fitting swaging, and wall thickness inspection.
Validate coiled reel handling, bending mandrels, or skid installation before ordering full wooden drum quantities.
Every coil receives 100% NDT, with hydrostatic testing per the applicable standard or order, backed by full EN 10204 3.1 certification.
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 | 8.0-11.0 | — | 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 |
- Standards Conformance: ASTM A269/A213 · EN 10216-5/10217-7 · JIS G3463/G3448 · GB/T 12771/13296 · ISO 1127
- 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 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 without welds
• Excellent flexibility and strength
• Leak-resistant and corrosion-proof
• Suitable for tight space installation
Applications
• Oil & gas instrumentation systems
• Heat tracing and thermal control
• Pneumatic and hydraulic piping
• Semiconductor and biotech industries
For continuous coiled tubing in subsea, chemical injection, or downhole control systems, learn how buyers can verify our long-length orbital welding, continuous hydrostatic testing, and spool packaging.
Quality Control
• 100% pressure containment and bubble leak testing
• Coil flattening, flaring, and bending inspection
• Eddy current and intergranular corrosion tests
• Certified Mill Test Reports (MTRs) provided
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Coiled Tube Packaging & Loading Photos
Real product, inspection, packaging and loading photos.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor stainless steel coiled tube by outer diameter, wall thickness, joint-free coil length, grade, seamless or welded construction, surface finish, and customer-specified tolerances.
Low MOQ & Rapid Prototyping
MOQ is as low as 100–300 kg for flexible trial orders, with small batch customization and sample production supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.
Global Logistics & On-Time Delivery
For coiled tube exports worldwide, PVC wrapping and anti-corrosion and moisture protection are emphasized, with seaworthy pallets supporting secure coil handling.
How your order is made, checked and shipped
Tube forming at the partner factory
Heat treatment (annealing)
Dimensional inspection
Alloy verification with a handheld analyzer
Export packing
Container loading
What Global Buyers Say About TeCarve Tubing
“I've received the goods and everything is fine.”
“The goods already send to customers. I am waiting for the next order from them.”
“…there is no need of inspection this time… I trust in your product.”
Frequently Asked Questions
What is stainless steel coiled tube?
Stainless steel coiled tube is seamless or welded tube produced in continuous coils, eliminating field joints for long runs. It is used in heat exchangers, chemical injection lines, HVAC, refrigeration, and precision instrument tubing applications.
What OD and wall thickness are available for coiled stainless steel tube?
Coiled tube is available in OD from 0.8 mm to 25.4 mm with wall thickness 0.2 mm to 2.5 mm. Coil lengths exceed 300 m for small OD tubes. Standard grades are 304, 316L, and duplex 2205; all supplied in fully annealed condition.
What is the minimum bend radius for stainless steel coiled tube?
Minimum bend radius is typically 3× OD for seamless tube and 4× OD for welded tube in soft-annealed condition. Tighter radii are achievable with mandrel bending for small-OD precision coils.
What standards apply to coiled stainless steel tube?
Coiled tubes comply with ASTM A269 (general service seamless and welded), ASTM A213 (boiler/heat exchanger service), EN 10216-5, and EN 10217-7. Full proof pressure testing and EN 10204 3.1 material certification are standard.
What are the advantages of coiled tube over straight tube in the field?
Coiled tube eliminates field joints and compression fittings, reducing leak points. It allows continuous instrument or chemical injection runs over long distances. The coil form also improves heat transfer in compact immersion heat exchangers.
What continuous lengths can TeCarve supply for coiled tubing?
We supply continuous coiled tubing in long jointless lengths depending on outer diameter and wall thickness, minimizing field fittings and potential leak points in chemical injection and instrumentation lines.
What non-destructive and pressure testing is conducted on coiled tubes?
Every continuous coil undergoes NDT per standard or order to ensure integrity along the entire length. Hydrostatic testing is conducted per ASTM A269 / A213 or customer order specifications.
How is coiled tubing packaged for international ocean shipment?
Coils are securely banded and packaged in seaworthy wooden cases. Tube ends are fitted with protective plastic caps to prevent dust, moisture, and transit damage.
Contact TeCarve