Stainless Steel Coil Tube — PED / AD2000 / NACE / Class-Society Certified
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. supplies premium-grade stainless steel coil tubes engineered for demanding industrial applications across energy, petrochemical, marine, and process engineering sectors. Our coil tube products are manufactured to meet the most stringent international regulatory and classification standards, ensuring seamless integration into critical infrastructure where safety, durability, and compliance are non-negotiable.
As a leading manufacturer and distributor, Wenzhou Jixing provides both standard and custom-configured stainless steel coil tubes, backed by a comprehensive quality assurance framework that covers material traceability, dimensional precision, and full regulatory certification.
Material & Properties
Our stainless steel coil tubes are available in a wide range of austenitic, ferritic, and duplex alloy grades to suit diverse operating environments:
- 304 / 304L — General-purpose corrosion resistance; excellent formability
- 316 / 316L — Superior resistance to chlorides and acidic media
- 321 / 347 — Stabilized grades for elevated-temperature service
- 310S — High-temperature oxidation resistance up to 1150 °C
- 2205 Duplex — High yield strength with enhanced chloride stress-corrosion resistance
- Custom Alloys — Available upon request for specialized chemical environments
All materials comply with ASTM, EN, JIS, and GB standards. Mechanical properties including tensile strength, yield strength, elongation, and hardness are verified through lot-by-lot testing.
Specifications
| Parameter | Specification |
|---|---|
| Outer Diameter (OD) | 3.0 mm – 168.0 mm |
| Wall Thickness | 0.3 mm – 12.0 mm |
| Coil Length | 10 m – 120 m (customizable) |
| Coil Inner Diameter | 150 mm – 600 mm |
| Surface Finish | BA, No.4, Hairline, Matte, Pickled & Passivated |
| Manufacturing Method | Seamless / Welded (ERW, TIG) |
| Applicable Standards | ASTM A269, ASTM A213, EN 10216-5, EN 10217-7, GB/T 12771 |
| Temperature Range | −196 °C to +1150 °C (grade-dependent) |
| Pressure Rating | Up to 40 MPa (design-dependent) |
Manufacturing Process
Wenzhou Jixing employs a fully controlled manufacturing pipeline to ensure dimensional accuracy, metallurgical integrity, and surface quality:
- Raw Material Selection — Certified billets or strip stock from accredited mills, verified by mill test certificates (MTC) and spectrographic analysis.
- Forming & Welding — Precision cold- or hot-forming followed by TIG or ERW welding where applicable, with in-line visual and ultrasonic inspection.
- Heat Treatment — Solution annealing and pickling to restore full austenitic structure and remove surface oxides.
- Dimensional Calibration — Multi-station sizing and straightening to achieve tight OD and wall-thickness tolerances (±0.1 mm typical).
- Coiling — Precision coiling onto specified mandrel diameters with protective wrapping to prevent handling damage.
- Final Inspection — Hydrostatic testing, eddy-current examination, dimensional verification, and surface quality audit prior to dispatch.
Applications
Our certified stainless steel coil tubes serve a broad spectrum of high-value industries:
- Heat Exchangers & Boilers — Spirally coiled tubes for shell-and-tube, air-cooled, and plate-fin heat exchangers
- Petrochemical & Refining — Process piping, reactor internals, and distillation columns under NACE MR0175 compliance
- Marine & Offshore — Seawater piping, ballast systems, and structural components certified by DNV, ABS, Lloyd's, or BV
- Pressure Vessels & Plant Equipment — PED (EU Pressure Equipment Directive) and AD2000 (German boiler directive) compliant assemblies
- Food & Pharmaceutical — Sanitary-grade coil tubing for CIP/SIP processes
- Aerospace & Defense — High-temperature exhaust manifolds and hydraulic lines
Quality Certifications
Wenzhou Jixing Metal Materials Co., Ltd. maintains an extensive portfolio of international certifications and regulatory approvals. Our stainless steel coil tube products can be supplied with the following certifications, depending on project requirements:
- PED (Pressure Equipment Directive 2014/68/EU) — CE-marked supply for pressure equipment modules 2 through 7, covering design, manufacture, and in-service inspection.
- AD2000 (German Technical Rules for Pressure Vessels) — Full compliance with AD-W 23, AD-Merkblatt 2000/1, and related appendices for welded and seamless pressure parts.
- NACE MR0175 / ISO 15156 — Certified resistance to sulfide stress cracking and corrosion in H₂S-containing environments; covers material procurement, welding, and heat treatment protocols.
- Class-Society Certifications — Approved for marine and offshore applications under DNV-GL, American Bureau of Shipping (ABS), Lloyd's Register (LR), Bureau Veritas (BV), and China Classification Society (CCS).
- ISO 9001:2015 — Quality Management System certified for consistent process control and continuous improvement.
- EN 10204 3.1 / 3.2 Certificates — Third-party inspection and material testing documentation available upon request.
Certification Fee Structure
To maintain the highest standards of compliance, Wenzhou Jixing offers a transparent certification cost structure. For new customers or small-batch orders, certification fees for PED, AD2000, NACE, and Class-Society approvals may be charged separately as a one-time allocation. This reflects the cost of initial type-testing, auditor engagement, and documentation preparation required to register the product under the respective regulatory framework. For ongoing or repeat orders, these certification costs are typically absorbed into the standard pricing structure, ensuring no recurring surcharges.
Note: Certification fees are applicable only upon first collaboration or when order volumes fall below the standard production threshold. Customers are advised to confirm certification scope and associated costs during the quotation stage to ensure full project budget alignment.
Unique Selling Points
- Multi-Certification Readiness — Single-source supply with simultaneous PED, AD2000, NACE, and Class-Society compliance, reducing vendor management complexity.
- Full Traceability — Every coil tube is traceable from mill heat number through final coil identification, supporting audit and regulatory inspection requirements.
- Flexible Order Sizing — Accommodates both large-scale production runs and prototype/small-batch requirements without compromising certification validity.
- Technical Partnership — Dedicated engineering support for material selection, stress analysis, and certification scope definition to optimize project timelines and costs.