Stainless Steel Coil Tube with Full Heat Batch Traceability — Wenzhou Jixing Metal Materials
Product Overview
The Stainless Steel Coil Tube (Product No. 212) is a precision-engineered coiled tubing solution manufactured by Wenzhou Jixing Metal Materials Co., Ltd. Designed for demanding industrial applications, this product delivers consistent mechanical performance, superior corrosion resistance, and reliable dimensional accuracy. A defining feature of this product line is its comprehensive heat batch number traceability system, ensuring that every coil tube is individually identified and directly linked to its corresponding Mill Test Certificate (MTC), thereby eliminating the risk of batch mixing and guaranteeing uniform material properties across every delivery lot.
Material & Properties
The coil tube is available in a range of austenitic and duplex stainless steel grades, including but not limited to:
- 304 / 304L (UNS S30400 / S30403) — Excellent general-purpose corrosion resistance and formability
- 316 / 316L (UNS S31600 / S31603) — Superior resistance to chlorides and pitting corrosion
- 321 (UNS S32100) — Stabilized against intergranular corrosion at elevated temperatures
- 310S (UNS S31008) — High-temperature oxidation resistance up to 1150°C
- 316L NACE MR0175 — Sulfide stress corrosion cracking resistant for oil & gas
Key material properties include:
- Tensile Strength: 515–730 MPa (75,000–106,000 psi) depending on grade
- Yield Strength: 205–310 MPa (30,000–45,000 psi)
- Elongation: ≥30% (minimum, per ASTM A213)
- Corrosion Resistance: Equivalent to or exceeding ASTM G48 / ASTM G102 benchmark values
- Operating Temperature Range: −196°C to +1100°C (−320°F to +2012°F), grade-dependent
Specifications
| Parameter | Specification |
|---|---|
| Product Name | Stainless Steel Coil Tube |
| Product Code | 212 |
| Material Grades | 304, 304L, 316, 316L, 321, 310S, 316L NACE |
| Outer Diameter (OD) | 3.0 mm to 100.0 mm (0.118" to 3.937") |
| Wall Thickness | 0.3 mm to 6.0 mm (0.012" to 0.236") |
| Coil Inner Diameter | 100 mm to 600 mm (3.94" to 23.62") |
| Coil Length | Custom (typically 50 m to 500 m per coil) |
| Surface Finish | Pickled & Passivated (P&P), 2B, BA, No. 4, Mirror (on request) |
| Applicable Standards | ASTM A213, ASTM A269, EN 10216-5, GB/T 12771, JIS G3459 |
| Heat Batch Traceability | Every coil marked with unique heat batch number; 1:1 correspondence with MTC |
| Packaging | Export-grade wooden crate or steel frame with moisture-proof wrapping |
Manufacturing Process
The coil tube is produced through a tightly controlled, multi-stage manufacturing process:
- Raw Material Selection: Only certified stainless steel billet or strip from approved mills is procured. Each incoming lot is verified against the supplier's MTC before acceptance.
- Hot or Cold Rolling: Seamless tubes are drawn and rolled to achieve the target OD and wall thickness. Cold-rolled products undergo controlled deformation for enhanced dimensional precision.
- Heat Treatment: Solution annealing is performed at temperatures between 1010°C and 1150°C (1850°F to 2092°F), followed by rapid water or air quenching to achieve the desired microstructure.
- Pickling & Passivation: Acid pickling removes oxide scale; passivation treatment establishes a protective chromium oxide layer for maximum corrosion resistance.
- Coiling: Tubes are coiled onto precision mandrels at controlled tension to prevent ovality, kinking, or springback.
- Heat Batch Number Assignment: Each completed coil is assigned a unique heat batch number that is physically marked on the coil's identification tag and linked in the quality database to the corresponding MTC.
- Final Inspection: Every coil undergoes dimensional verification, surface inspection, and spot chemical/spectroscopic analysis before packaging.
Heat Batch Traceability System — Unique Selling Point
"Every coil tells its own story — from heat to delivery."
Wenzhou Jixing Metal Materials has implemented an industry-leading heat batch number traceability management system as a core risk-control measure against batch mixing. This system provides:
- 1:1 MTC Correspondence: Each coil carries a unique heat batch number that maps directly to a single Mill Test Certificate, ensuring complete traceability from raw material heat to finished product.
- Batch Mixing Prevention: By segregating coils by heat batch at every handling stage — storage, loading, shipping — the system eliminates the risk of commingling materials with differing chemical compositions or mechanical properties.
- Performance Consistency Guarantee: End users can verify that all coils in a single delivery lot originate from the same production heat, ensuring uniform tensile strength, corrosion resistance, and dimensional tolerances throughout the entire coil.
- Full Digital Audit Trail: Heat batch records are maintained in a centralized quality database, enabling instant retrieval of chemical analysis, mechanical test results, and inspection reports for any given coil.
- Regulatory Compliance: The traceability system meets the requirements of ISO 9001, PED (Pressure Equipment Directive 2014/68/EU), ASME BPVC, and NACE MR0175 for critical applications.
Applications
The Stainless Steel Coil Tube with full heat batch traceability is widely used across industries where material integrity and performance consistency are critical:
- Heat Exchangers & Boilers: Coil tubes for hairpin tubes, U-tubes, and serpentine configurations in shell-and-tube heat exchangers, condensers, and evaporators.
- Oil & Gas Industry: Subsea umbilical tubing, downhole tubing, and NACE-compliant instrumentation tubing for offshore platforms and pipelines.
- Food & Beverage Processing: Sanitary tubing for dairy, brewery, and pharmaceutical processing systems requiring cleanability and corrosion resistance.
- Chemical & Petrochemical: Process piping, reactor coils, and heat transfer surfaces handling aggressive chemical media.
- Power Generation: Boiler tubes, superheater tubes, and condenser tubes in fossil-fuel and nuclear power plants.
- Automotive & Aerospace: Exhaust systems, fuel lines, hydraulic tubing, and structural components requiring high-temperature resistance.
- Medical Devices: Tubing for endoscopes, surgical instruments, and implantable devices requiring biocompatibility and precise dimensions.
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains a rigorous quality management framework supported by the following certifications and standards:
- ISO 9001:2015 — Quality Management System certification covering all manufacturing, inspection, and traceability processes
- EN 10204 3.1 / 3.2 — Third-party inspection and certification for export-grade products
- CE / PED 2014/68/EU — Compliance with European Pressure Equipment Directive for pressure-containing applications
- ASME / NB Stamp — National Board certification for pressure vessel and boiler components
- API 5L / API 5CT — American Petroleum Institute compliance for oil & gas applications
- NACE MR0175 / ISO 15156 — Certified for sulfide stress corrosion cracking resistant materials
- Mill Test Certificates (MTC) — Every coil is accompanied by a full EN 10204 3.1 MTC including chemical composition, mechanical test results, and heat treatment records
Ordering & Technical Support
Wenzhou Jixing Metal Materials Co., Ltd. offers customized coil tube solutions tailored to specific project requirements. Customers are encouraged to provide detailed specifications including grade, dimensions, length, surface finish, and applicable standards. The company's technical team provides full support for material selection, traceability verification, and compliance documentation throughout the procurement lifecycle.