Stainless Steel Coil Tube — NACE TM0284 HIC-Tested for Sour Service Applications
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. delivers premium-grade stainless steel coil tubes engineered specifically for the most demanding sour environments in the oil, gas, and petrochemical industries. Every coil tube product is subjected to rigorous Hydrogen-Induced Cracking (HIC) testing in accordance with NACE TM0284, ensuring superior resistance to sulfide stress cracking and hydrogen attack. These tubes are designed and certified to meet the stringent requirements of NACE MR0175 / ISO 15156, the internationally recognized standard governing materials used in sour service environments.
As a critical component in heat exchangers, process coils, and subsea production systems, our stainless steel coil tubes provide exceptional durability, corrosion resistance, and mechanical integrity under prolonged exposure to hydrogen sulfide (H₂S)-rich atmospheres.
Material & Properties
- Base Materials: Austenitic and duplex stainless steels including 304, 304L, 316, 316L, 321, 347, 904L, and duplex grades (2205, 2507) — selected based on specific service conditions.
- Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and general corrosion in chloride-containing and acidic media.
- Hydrogen Resistance: Validated HIC resistance through NACE TM0284 testing — H₂S-saturated solution immersion for 96 hours with zero cracking observed.
- Mechanical Properties: High tensile strength, excellent ductility, and superior fatigue resistance suitable for dynamic and cyclic loading conditions.
- Temperature Range: Operational capability from cryogenic temperatures (−196 °C) up to +600 °C depending on grade.
Specifications
| Parameter | Specification |
|---|---|
| Product Form | Coil Tube (Continuous Coil / Spooled Tube) |
| Outer Diameter (OD) | 3.175 mm – 25.40 mm (⅛" – 1") |
| Wall Thickness | 0.30 mm – 3.96 mm |
| Coil Length | Custom lengths from 50 m to 5,000 m+ per coil |
| Manufacturing Method | Seamless / Welded (per ASTM A213, A778, A269) |
| Surface Finish | Bright Annealed, Pickled & Passivated, or Polished |
| HIC Test Standard | NACE TM0284 — H₂S-Saturated Solution Immersion, 96 Hours |
| Sour Service Certification | NACE MR0175 / ISO 15156 Compliant |
| Applicable Grades | 304, 304L, 316, 316L, 321, 347, 904L, 2205, 2507 |
Manufacturing Process
- Raw Material Selection: Only certified, traceable stainless steel billets and strip from approved mills are used, with full mill test certificates (MTC) verified prior to processing.
- Piercing / Forming: Seamless tubes are produced via hot or cold piercing; welded tubes via precision strip forming with automatic orbital welding.
- Heat Treatment: Solution annealing in a controlled atmosphere to ensure optimal microstructure and maximum corrosion resistance.
- Precision Sizing: Cold drawing or rolling to achieve exact dimensional tolerances (±0.05 mm on OD, ±0.05 mm on wall thickness).
- Surface Treatment: Pickling and passivation to remove surface oxides and contaminants, establishing a protective chromium oxide layer.
- Coiling: Carefully wound onto precision cores to prevent deformation, kinking, or work hardening.
- Non-Destructive Testing (NDT): 100% eddy current testing (ECT) and hydrostatic pressure testing to detect internal and external defects.
- HIC Testing (NACE TM0284): Mandatory Hydrogen-Induced Cracking test — specimens immersed in H₂S-saturated NACE solution for 96 hours, followed by ultrasonic examination for internal cracking.
Applications
- Oil & Gas Production: Downhole tubing, Christmas tree assemblies, and wellhead components in sour gas wells.
- Heat Exchangers & Process Coils: Shell-and-tube heat exchangers, air coolers, and reboilers handling sour hydrocarbons.
- Subsea Systems: Umbilical lines, flow lines, and manifolds operating in high-pressure, high-temperature (HPHT) sour environments.
- Petrochemical Processing: Distillation columns, scrubbers, and absorbers where H₂S and CO₂ co-exist.
- Chemical Processing: Reactor coils and heat transfer systems handling aggressive sulfide-bearing fluids.
- Power Generation: Boiler and superheater tubes in environments with elevated sulfur content.
Quality Certifications & Testing
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality assurance program aligned with international standards:
- NACE TM0284 HIC Testing: Every batch of sour-service tubing undergoes mandatory HIC testing — H₂S-saturated solution immersion for 96 hours with post-test ultrasonic inspection. This is a mandatory inspection item for all NACE MR0175-compliant materials.
- NACE MR0175 / ISO 15156: Full compliance with the international standard for materials used in H₂S-containing environments in oil and gas production.
- ASTM Standards: Conformance to ASTM A213 (seamless), ASTM A269 (welded), and ASTM A778 (electrostatically precipitated tubing).
- ISO 9001:2015: Certified quality management system ensuring consistent product quality and continuous improvement.
- API Standards: Available in API 5CT and API 5L equivalents for oil and gas industry applications.
- Full Traceability: Every coil tube shipment is accompanied by a complete Mill Test Certificate (MTC), HIC test report, dimensional inspection records, and NDT documentation.
Why Choose Wenzhou Jixing Metal Materials?
Uncompromising Safety in Sour Service: Our NACE TM0284 HIC-validated stainless steel coil tubes eliminate the risk of catastrophic hydrogen-induced cracking failure — protecting lives, assets, and the environment in the most corrosive industrial conditions.
- Mandatory HIC Testing: Unlike many suppliers, we make NACE TM0284 HIC testing a non-negotiable, batch-by-batch requirement for all sour-service products.
- Full Compliance: Certified to NACE MR0175 / ISO 15156, providing immediate qualification for sour service applications without additional third-party testing.
- Grade Flexibility: Extensive material grade availability from standard austenitic to high-performance super-duplex alloys.
- Custom Coiling: Flexible coil length and packaging options tailored to customer fabrication requirements.
- Complete Documentation: Full traceability from raw material to finished product, with all test reports included in every delivery.