Stainless Steel Coil Tube with Full Heat Lot Traceability
Wenzhou Jixing Metal Materials Co., Ltd. delivers premium stainless steel coil tubes engineered for demanding industrial applications where material consistency, traceability, and performance reliability are non-negotiable. Every coil tube produced is individually identified with a unique heat lot number, establishing a one-to-one correspondence with the associated Mill Test Certificate (MTC). This rigorous traceability system ensures complete supply-chain transparency and eliminates the risk of batch mixing that could compromise mechanical and chemical property uniformity.
Product Overview
The stainless steel coil tube offered by Wenzhou Jixing Metal Materials is manufactured to exacting metallurgical standards and supplied in continuous coil form for downstream processing efficiency. The product is designed for applications requiring high corrosion resistance, mechanical integrity, and dimensional precision. Each coil is assigned a unique heat lot identifier at the point of production, enabling full lifecycle traceability from raw material smelting through final delivery. This system is a critical risk-control measure that prevents the inadvertent commingling of different heat lots, which could otherwise result in inconsistent tensile strength, corrosion resistance, and thermal performance across a single order.
Material & Properties
- Material Grades: 304, 304L, 316, 316L, 321, 310S, and custom alloy specifications upon request
- Chemical Composition: Certified per ASTM A213 / A269 / ASME SA-213 standards; every heat lot is verified against specified carbon, chromium, nickel, molybdenum, and other alloying element limits
- Mechanical Properties: Tensile strength, yield strength, elongation, and hardness values are documented per heat lot and verified against applicable international standards
- Corrosion Resistance: Superior resistance to pitting, crevice, and general corrosion in acidic, alkaline, and chloride-containing environments
- Surface Finish: Available in bright annealed, pickled and annealed, hairline, and polished finishes
Specifications
| Parameter | Specification |
|---|---|
| Product Form | Continuous Coil Tube |
| Outer Diameter | 4.0 mm – 108.0 mm (custom sizes available) |
| Wall Thickness | 0.30 mm – 6.00 mm |
| Coil Length | 100 m – 1,000 m per coil (configurable) |
| Coil Inner Diameter | 300 mm – 600 mm |
| Manufacturing Method | Seamless (capillary / pierce-rolling) and welded (ERW / orbital TIG) |
| Surface Treatment | Bright annealed, pickled & passivated, or custom |
| Applicable Standards | ASTM A213, A269; ASME SA-213, SA-269; EN 10216-5; GB/T 12771 |
| Traceability System | Unique heat lot number per coil, one-to-one MTC correspondence |
| Inspection Methods | Eddy current, ultrasonic, hydrostatic pressure testing, dimensional inspection |
Manufacturing Process
- Raw Material Selection & Ingot Casting: High-purity stainless steel billets are sourced from certified mills. Each ingot is assigned a heat lot number at the time of smelting, initiating the traceability chain.
- Hot Rolling & Billet Preparation: Billets are reheated and hot-rolled to the required pre-draw dimensions with strict control over grain structure and homogeneity.
- Tube Forming: Seamless tubes are produced via capillary or pierce-rolling methods; welded tubes are formed through ERW or orbital TIG welding with full seam inspection.
- Cold Drawing & Sizing: Tubes are cold-drawn through precision dies to achieve exact dimensional tolerances, improved surface finish, and enhanced mechanical properties.
- Heat Treatment & Annealing: Solution annealing is performed under controlled atmosphere conditions to restore ductility, relieve residual stresses, and ensure uniform microstructure.
- Surface Processing: Pickling and passivation remove scale and contamination, establishing a protective chromium oxide layer for long-term corrosion resistance.
- Non-Destructive Testing & Quality Control: Every tube undergoes eddy current testing for wall thickness uniformity, ultrasonic inspection for internal defects, and hydrostatic pressure testing for leak integrity.
- Coiling & Heat Lot Identification: Upon completion of quality verification, each tube is coiled and permanently marked with its unique heat lot number. This identifier is cross-referenced with the MTC to ensure complete traceability.
- Packaging & Dispatch: Coils are wrapped, palletized, and labeled with heat lot information prior to shipment. Documentation packages include the MTC, test reports, and material certificates.
Heat Lot Traceability Management — A Core Differentiator
At Wenzhou Jixing Metal Materials, traceability is not an afterthought — it is embedded into every stage of production. Each coil tube carries a unique heat lot number that maps directly to its corresponding Mill Test Certificate. This one-to-one correspondence ensures that:
- Batch Mixing Is Eliminated: Different heat lots are never commingled within a single coil or shipment, preventing property variation that could lead to premature failure in service.
- Full Chemical & Mechanical Verification: The MTC associated with each heat lot documents the exact chemical analysis and mechanical test results for that specific batch, providing auditable proof of compliance.
- Regulatory & Audit Readiness: Industries such as pharmaceuticals, food processing, aerospace, and nuclear require full material traceability. The heat lot system ensures seamless compliance with regulatory inspection and quality audit requirements.
- Rapid Root-Cause Analysis: In the event of a field performance issue, the heat lot number enables immediate identification of the specific production batch, facilitating rapid investigation and containment.
- Supply Chain Integrity: The traceability system extends from the smelting furnace through all downstream processes, providing an unbroken audit trail that instills confidence in every stakeholder.
Applications
- Heat Exchangers & Boilers: Seamless coil tubes for high-pressure heat exchange systems in power generation, petrochemical, and chemical processing plants
- Food & Beverage Processing: Hygienic-grade tubing for dairy, brewing, and food-grade fluid conveyance systems requiring full material traceability
- Pharmaceutical Manufacturing: GMP-compliant tubing for bioprocessing, clean steam systems, and pharmaceutical fluid handling
- Automotive & Aerospace: Precision tubing for exhaust systems, fuel lines, hydraulic circuits, and structural components
- Medical Devices: High-purity tubing for surgical instruments, dialysis systems, and medical gas delivery
- Oil & Gas Industry: Corrosion-resistant tubing for downhole applications, chemical injection lines, and offshore platforms
- Construction & Architectural: Decorative and structural tubing for facade systems, handrails, and interior design elements
Quality Certifications & Compliance
- ISO 9001:2015 — Quality Management System certification ensuring consistent product quality and continuous improvement
- ISO 14001 — Environmental Management System certification for responsible and sustainable manufacturing practices
- EN 10204 3.1 / 3.2 — Third-party inspection and material certification available upon request
- Mill Test Certificate (MTC) per Heat Lot — Each coil tube is accompanied by a detailed MTC documenting chemical composition, mechanical properties, and test results specific to that heat lot
- NACE / AMPP Compliance — Available for corrosion-resistant applications in oil and gas environments
- Third-Party Inspection (TPI) — Independent inspection services available from SGS, BV, TUV, and other accredited bodies
Why Choose Wenzhou Jixing Metal Materials
- Uncompromising Traceability: Industry-leading heat lot identification system with one-to-one MTC correspondence — no other supplier matches this level of batch-level accountability
- Consistent Performance: By eliminating batch mixing at the source, every coil delivers uniform mechanical and chemical properties throughout its entire length
- Customization Flexibility: Tailored dimensions, grades, surface finishes, and coil configurations to meet specific project requirements
- Comprehensive Documentation: Complete quality dossiers including MTC, test reports, dimensional inspection records, and heat treatment logs for every shipment
- Global Delivery Capability: Export-oriented logistics with secure packaging and international shipping documentation for worldwide distribution
Wenzhou Jixing Metal Materials Co., Ltd. stands at the forefront of stainless steel coil tube manufacturing by integrating rigorous metallurgical standards with a best-in-class traceability system. For projects where material integrity, regulatory compliance, and supply chain transparency are paramount, our heat lot traceability management provides the assurance that every coil tube performs exactly as specified — from the furnace to the field.