Stainless Steel Coil Tube — Packaging, Handling & Delivery Standards
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. manufactures and supplies high-grade stainless steel coil tubes designed for demanding industrial applications including heat exchangers, chemical processing, food and beverage equipment, pharmaceutical systems, and marine environments. Each coil tube is delivered in a precision-wound configuration that preserves dimensional integrity, surface finish quality, and metallurgical properties from the mill to the end-user facility.
Recognizing that transport and handling represent critical risk factors in the supply chain, Wenzhou Jixing has developed a rigorous packaging and logistics protocol to ensure that every coil tube arrives at the customer's receiving dock in pristine condition — free from mechanical damage, surface contamination, or structural deformation.
Material & Properties
- Material Grades: SUS304, SUS304L, SUS316, SUS316L, SUS321, SUS310S, and custom alloy specifications upon request
- Surface Finish: 2B, BA (Bright Annealed), No.4, Mirror (8K), or custom finishes
- Manufacturing Method: Cold-drawn seamless or welded coil tube, available in both solid and finned configurations
- Corrosion Resistance: Superior resistance to pitting, crevice, and general corrosion in aggressive chemical and marine environments
- Mechanical Properties: High tensile strength, excellent ductility, and fatigue resistance suitable for pressure-vessel and heat-exchange applications
Packaging & Handling Specifications
Multi-Layer Packaging System
To mitigate the risk of transport-induced damage, every stainless steel coil tube is packaged using a three-tier protective system:
| Packaging Layer | Material | Function |
|---|---|---|
| Primary — Stretch Wrap | Industrial-grade polyethylene stretch film (缠绕膜) | Prevents moisture ingress, dust contamination, and minor abrasion during transit |
| Secondary — Partition Boards | Hardboard or plywood dividers (隔板) | Prevents coil-to-coil contact, eliminates inter-tube scratching, and maintains structural spacing |
| Outer — Wooden Crate | Export-grade ISPM-15 heat-treated timber (木箱) | Provides rigid structural protection, stackability, and compliance with international shipping standards |
Handling & Transportation Prohibitions
STRICTLY PROHIBITED: Throwing, dropping, rolling, or sliding coil tubes from any elevated surface or transport vehicle. All loading and unloading operations must be performed using appropriate mechanical lifting equipment (forklift, crane, or hoist) with rated capacity exceeding the gross weight of the packaged coil by a minimum safety factor of 1.5x.
Key Performance Indicators & Contractual Terms
- Appearance Inspection Standard: Upon delivery, the recipient shall conduct a visual inspection in accordance with the acceptance criteria specified in the purchase contract. Acceptable condition includes: intact stretch wrap, undamaged wooden crate, no visible dents, scratches exceeding 0.1 mm depth, or deformation of the coil geometry.
- Claim & Dispute Resolution: Any transport-related damage must be documented within 48 hours of delivery with photographic evidence and written notification to Wenzhou Jixing. The contract shall explicitly define liability allocation, compensation limits, and the timeline for claim submission and resolution.
- Storage Requirements: Coils must be stored indoors or under waterproof cover, off the ground on pallets, and away from direct contact with carbon steel or other reactive materials to prevent galvanic corrosion.
Specifications
| Parameter | Range / Standard |
|---|---|
| Outer Diameter (OD) | 3.0 mm – 108.0 mm |
| Wall Thickness | 0.3 mm – 6.0 mm |
| Coil Length | Custom (typically 50 m – 500 m per coil) |
| Tolerance (OD) | ±0.05 mm (precision grade available) |
| Tolerance (Wall) | ±0.02 mm |
| Standard Compliance | ASTM A269, ASTM A213, GB/T 12771, JIS G3459 |
| End Condition | Plain, beveled, or threaded as specified |
| Maximum Package Weight | ≤ 5,000 kg per wooden crate (adjustable per freight mode) |
Manufacturing Process
- Raw Material Procurement: Virgin stainless steel strip or bar stock sourced from certified mills, with full chemical and mechanical test documentation.
- Tube Forming: Precision cold-drawing or seamless piercing to achieve exact dimensional tolerances and superior surface quality.
- Heat Treatment: Solution annealing and pickling to restore full corrosion resistance and relieve residual stresses.
- Surface Finishing: Mechanical polishing or chemical passivation to achieve the specified surface finish grade.
- Coiling: Controlled-speed winding onto precision steel mandrels to ensure uniform coil geometry and prevent internal stress concentration.
- Quality Inspection: 100% visual inspection, dimensional verification, and non-destructive testing (EDDY current or hydrostatic pressure test) as applicable.
- Packaging: Sequential application of stretch wrap, partition boards, and wooden crate assembly per the multi-layer packaging protocol described above.
Applications
- Heat exchanger coils in power generation, petrochemical, and HVAC systems
- Condensers, evaporators, and refrigeration coils
- Food processing and dairy equipment requiring sanitary-grade tubing
- Pharmaceutical and bioprocessing systems (GMP-compliant environments)
- Marine heat exchangers and shipboard piping systems
- Automotive exhaust and catalytic converter substrate tubing
- Aerospace fuel and hydraulic system tubing
Quality Certifications & Compliance
- ISO 9001:2015 — Quality Management System certification for manufacturing and supply chain operations
- ISO 14001:2015 — Environmental Management System compliance
- Material Certifications: Mill Test Certificates (MTC) per EN 10204 3.1 for every lot shipped
- Transport Packaging: ISPM-15 compliance for all wooden packaging materials (international phytosanitary standards)
- Product Standards: ASTM, ASME, EN, JIS, and GB national standards as applicable to the specified grade and application
- Third-Party Inspection: Available upon request — SGS, BV, or TÜV verification of packaging condition, dimensional accuracy, and material compliance
Unique Selling Points
- Zero-Damage Delivery Guarantee: The proprietary three-layer packaging system (stretch wrap + partition boards + ISPM-15 wooden crate) provides industry-leading protection against transport damage, reducing customer-side rejection rates to near zero.
- Contract-Backed Quality Assurance: Explicitly defined appearance acceptance criteria and claim resolution mechanisms embedded in every purchase agreement, providing full transparency and accountability across the supply chain.
- End-to-End Traceability: From raw material mill certification through final packaging, every coil is traceable with batch numbers, test reports, and handling documentation.
- Custom Packaging Solutions: For oversized or high-value coils, Wenzhou Jixing offers tailored packaging configurations including vacuum-sealed crates, desiccant incorporation, and shock-indicating labels.
Ordering & Delivery Notes
Customers are advised to specify the desired packaging configuration, transport mode (sea freight, road freight, or air freight), and destination port or site during the quotation request. Wenzhou Jixing Metal Materials Co., Ltd. will confirm the appropriate packaging specification and include relevant handling instructions in the shipping documentation. All shipments are accompanied by a Packing List, Certificate of Origin, Mill Test Certificate, and a Handling & Storage Advisory Sheet.