Stainless Steel Coil Tube (Coiltube) — Actual Weighing Settlement System
Product Overview
The Stainless Steel Coil Tube (Coiltube) manufactured by Wenzhou Jixing Metal Materials Co., Ltd. represents a premium-grade continuous-length tubing product supplied in coiled configuration. This product is distinguished by its industry-leading Actual Weighing Settlement (实际过磅结算) methodology, which employs calibrated floor scales (地磅) and overhead crane scales (吊秤) to determine the precise net weight of each coil at the point of delivery. This transparent, measurement-driven pricing approach ensures absolute fairness in commercial transactions and effectively eliminates disputes arising from dimensional tolerance variations inherent in continuous coiling processes.
As a mainstream procurement solution in the global stainless steel tubing market, the Actual Weighing Settlement model provides buyers with verifiable, auditable weight data, establishing a foundation of trust between supplier and purchaser. This system is particularly advantageous for bulk procurement operations where coil weights may range from several hundred kilograms to several metric tons.
Material & Properties
The Stainless Steel Coil Tube is fabricated from high-quality austenitic and/or ferritic stainless steel grades, offering exceptional corrosion resistance, mechanical strength, and dimensional stability. The continuous coiling format allows for maximum material utilization with minimal cutting waste, making it an economically efficient choice for high-volume manufacturing applications.
- Material Grades: SUS304, SUS316, SUS321, SUS310S, and other standard stainless steel alloys conforming to ASTM, EN, and JIS specifications.
- Corrosion Resistance: Superior resistance to oxidation, acid, and chloride environments due to chromium oxide passive layer formation.
- Mechanical Properties: High tensile strength, excellent ductility, and uniform wall thickness throughout the coil length.
- Thermal Properties: Stable performance across a wide temperature range, from cryogenic to elevated-temperature service conditions.
- Hygienic Surface: Available in polished (BA), matte, and rough surface finishes suitable for food-grade and pharmaceutical applications.
Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Product Form | Coiled Tube (Continuous Coil) | — |
| Outer Diameter (OD) | 6.0 – 168.3 | mm |
| Wall Thickness | 0.5 – 12.0 | mm |
| Coil Inner Diameter | 300 – 600 | mm |
| Coil Weight Range | 500 – 5,000 | kg |
| Material Standard | ASTM A213 / A269 / EN 10216-5 / JIS G3459 | — |
| Surface Finish | BA / 2B / No.4 / Mirror / Pickled & Passivated | — |
| Settlement Method | Actual Weighing Settlement (Floor Scale / Overhead Crane Scale) | — |
| Scale Calibration | Third-party certified; ±0.1% accuracy | — |
| Weight Verification | Independent verification available upon request | — |
Manufacturing Process
The production of Stainless Steel Coil Tubes follows a rigorous multi-stage manufacturing workflow designed to ensure dimensional precision, material integrity, and consistent quality:
- Raw Material Procurement: Sourcing of certified stainless steel strips from approved mills with full mill test certificates (MTC) and chemical composition verification.
- Coiling & Forming: Precision roll-forming of flat stainless steel strip into tubular profiles using automated forming lines with real-time dimensional monitoring.
- Welding (if applicable): High-frequency induction welding or orbital TIG welding to produce seamless or welded coil tube configurations.
- Heat Treatment: Solution annealing at controlled temperatures to relieve residual stresses and restore full austenitic microstructure.
- Surface Finishing: Acid pickling and passivation treatment to remove oxide scale and establish a protective chromium oxide layer.
- Coiling & Packaging: Final coiling onto standardized cores with protective wrapping and moisture-barrier packaging for shipment readiness.
- Actual Weighing & Settlement: Each completed coil is weighed using calibrated floor scales (地磅) or overhead crane scales (吊秤) to determine the exact net weight for commercial settlement. Weight data is recorded, documented, and made available to the purchaser for verification.
Quality Certifications & Settlement Assurance
The Actual Weighing Settlement system implemented by Wenzhou Jixing Metal Materials Co., Ltd. is underpinned by the following quality assurance measures:
- Calibrated Weighing Equipment: All floor scales and overhead crane scales are periodically calibrated and certified by accredited third-party metrology organizations to maintain measurement accuracy within ±0.1% of true weight.
- Independent Verification: Purchasers are welcome to arrange independent weigh-in verification at the loading dock or at their receiving facility, ensuring full transparency in the settlement process.
- Documentation: Each coil is accompanied by a detailed weight certificate, material test report (MTR), and dimensional inspection records.
- ISO 9001 Quality Management: The manufacturing and settlement processes are managed under a certified quality management system ensuring consistent compliance with international standards.
- EN 10204 Certificate Type 3.1: Material test certificates are issued in accordance with European standard EN 10204, providing traceability and chemical/mechanical property verification.
Applications
Stainless Steel Coil Tubes with Actual Weighing Settlement are widely deployed across multiple industrial sectors:
- Oil & Gas Industry: High-pressure pipeline systems, heat exchanger tubing, and subsea production infrastructure.
- Food Processing & Dairy: Hygienic-grade tubing for milk processing, beverage production, and food-grade conveying systems.
- Pharmaceutical Manufacturing: Clean-room compatible tubing for sterile fluid transfer and CIP/SIP systems.
- Chemical Processing: Corrosive chemical transport lines, reactor internals, and distillation column tubing.
- Petrochemical & Power Generation: Boiler tubes, superheater elements, and steam generator components.
- Automotive & Aerospace: Exhaust systems, fuel lines, and structural tubing requiring high-temperature resistance.
- Medical Equipment: Endoscopic tubing, infusion systems, and surgical instrument components.
Unique Selling Points
Actual Weighing Settlement — The Gold Standard in Transparent Procurement
- Eliminates Tolerance Disputes: By basing settlement on measured net weight rather than theoretical calculations, this method removes ambiguity caused by dimensional tolerances, coil configuration variations, and material density fluctuations.
- Fair & Transparent Pricing: Every kilogram is accounted for through verifiable, calibrated measurement — building long-term trust between supplier and buyer.
- Mainstream Industry Practice: This is the dominant settlement methodology for coil tube products globally, recognized as the industry benchmark for commercial fairness.
- Auditable & Traceable: All weighing records are documented, timestamped, and available for independent audit at any time.
- Cost Efficiency: Buyers pay only for actual material received — no overpayment for theoretical weight excess or underpayment disputes.
- Scalable for Bulk Orders: The system accommodates single coils up to multi-ton shipments with consistent measurement reliability.
By adopting the Actual Weighing Settlement methodology, Wenzhou Jixing Metal Materials Co., Ltd. delivers not only a premium stainless steel coil tube product but also a procurement experience defined by transparency, precision, and mutual trust — setting a new standard in commercial integrity within the stainless steel tubing industry.