Stainless Steel Coil Tube — Packaging, Handling & Logistics Specifications

Product Overview

Wenzhou Jixing Metal Materials Co., Ltd. (Product Ref. No. 211) offers premium-grade stainless steel coil tubes designed for demanding industrial applications across heat exchange, chemical processing, food and beverage manufacturing, pharmaceutical, and energy sectors. Each coil tube is wound to precise dimensional tolerances and delivered with a comprehensive packaging and handling protocol engineered to ensure zero transport damage and uncompromised surface integrity upon arrival at the customer's facility.

This product classification falls under the commercial procurement category with a specific focus on risk mitigation during logistics — addressing the critical issue of transport-induced damage through standardized packaging, controlled loading/unloading procedures, and contractual appearance acceptance criteria with defined claim provisions.

Material & Properties

Stainless steel coil tubes are available in a range of austenitic and duplex grades, each selected to meet specific corrosion resistance, mechanical strength, and thermal performance requirements:

• 304 / 304L: General-purpose grade offering excellent corrosion resistance and formability; widely used in food processing and architectural applications.
• 316 / 316L: Enhanced molybdenum content provides superior resistance to pitting and crevice corrosion in chlorinated environments.
• 321: Columbium-stabilized grade suitable for elevated temperature service up to 870 °C (1,600 °F).
• 310S: High-temperature oxidizing environment grade with exceptional scaling resistance.
• Duplex 2205: Combined austenitic-ferritic microstructure delivering high yield strength (450 MPa minimum) with excellent chloride stress corrosion cracking resistance.

Specifications

Parameter	Specification
Product Reference	No. 211 — Coil Tube (盘管)
Available Grades	304, 304L, 316, 316L, 321, 310S, 2205 Duplex
Outer Diameter (OD)	6.0 mm – 168.3 mm (¼" – 6¾")
Wall Thickness	0.5 mm – 12.0 mm (0.020" – 0.472")
Coil Length per Roll	50 m – 500 m (164 ft – 1,640 ft) or as specified
Surface Finish	No. 1, 2B, BA (Bright Annealed), 2D, No. 4 Brushed
Coil Core Diameter	114 mm (4.5") or 219 mm (8.6")
Coil Outer Diameter (Max.)	1,200 mm (47.2")
Dimensional Tolerance	Per ASTM A213 / A269 / EN 10217-7
Packaging	Wooden crate with internal dividers + stretch wrap film
Handling Restriction	Dropping and rolling strictly prohibited
Acceptance Criteria	Per contractually agreed visual inspection standard

Manufacturing Process

The production of stainless steel coil tubes at Wenzhou Jixing Metal Materials Co., Ltd. follows a rigorously controlled sequence:

1. Raw Material Sourcing: Hot-rolled stainless steel strip is procured from certified mills with full chemical composition traceability and mill test certificates (MTCs).
2. Pipe Forming: Precision roll-forming or seamless piercing techniques convert strip or bar stock into tubular blanks at controlled temperatures.
3. Welding (ERW): For welded coil tubes, electric resistance welding (ERW) is performed at calibrated frequencies to produce a uniform, full-penetration weld seam.
4. Heat Treatment & Annealing: Tubes are solution-annealed in a controlled atmosphere furnace (typically 1050 °C – 1150 °C / 1,922 °F – 2,092 °F) followed by controlled cooling to achieve the desired microstructure and mechanical properties.
5. Pickling & Descaling: Chemical pickling removes oxide scale, restoring the passive chromium oxide layer essential for corrosion resistance.
6. Coiling: Annealed and cleaned tubes are wound onto precision steel cores using hydraulic tension-controlled coil winding machines to maintain consistent layer-to-layer contact and prevent inter-layer galling.
7. Quality Inspection: Each coil undergoes dimensional verification, surface visual inspection, and hydrostatic pressure testing per applicable standards.
8. Packaging & Dispatch: Coils are secured per the packaging protocol detailed below prior to shipment.

Packaging & Handling Protocol

Standard Packaging Configuration

Every coil tube shipment is protected using a multi-layer packaging system specifically engineered to prevent transport damage:

• Primary Protection: Each coil is wrapped in high-density stretch wrap film (minimum 3 layers) to prevent moisture ingress, dust contamination, and inter-layer abrasion during transit.
• Secondary Protection: Coils are placed inside export-grade hardwood crates (ISPM-15 heat-treated) with internal wooden dividers (隔板) that isolate individual coils and absorb lateral shock forces.
• Crush-Proof Structure: Crate walls are reinforced with corner blocks and diagonal bracing to withstand stacking loads and forklift handling stresses.
• Identification & Marking: Each crate is clearly marked with product reference number, grade, dimensions, coil count, gross/net weight, and handling instructions including "THIS SIDE UP" and "DO NOT DROP" indicators.

Loading & Unloading Restrictions

Strict Prohibition: Dropping, tossing, or rolling of packaged coil tubes is absolutely prohibited at all stages of loading, transshipment, and unloading. All handling must be performed using rated forklifts, overhead cranes, or vacuum lifters with appropriate coil grippers. Impact loading exceeding 0.5 g sustained deceleration may cause coil deformation, surface scratching, or structural failure of the packaging.

Transport Damage Risk Mitigation

The packaging and handling protocol directly addresses the most common failure mode in coil tube logistics — transport damage — through:

• Elimination of kinetic energy transfer via padded dividers and cushioned crate interiors.
• Prevention of coil slippage using V-blocks or coil locks inside the crate.
• Environmental sealing via stretch wrap to prevent oxidation and moisture-related surface defects during sea freight or long-haul road transport.
• Clear contractual documentation of handling requirements communicated to all logistics partners.

Contractual Acceptance & Claim Provisions

Appearance Acceptance Standard

All coil tube deliveries are subject to a mutually agreed visual inspection standard defined in the purchase contract. The acceptance criteria include:

• Surface Condition: No visible scratches, dents, gouges, or abrasion marks exceeding 1.0 mm depth or 50 mm length on the tube surface.
• Coil Integrity: No deformation, kinking, or inter-layer galling; uniform layer-to-layer alignment with no displaced segments.
• Packaging Condition: Crate must arrive intact with no broken dividers, torn stretch wrap, or structural compromise.
• Dimensional Compliance: OD and wall thickness within specified tolerances per ASTM A213 / EN 10217-7.

Claim & Dispute Resolution

The purchase contract incorporates explicit claim clauses governing transport damage scenarios:

1. Inspection Window: Buyer must conduct visual and dimensional inspection within 5 business days of delivery and notify the seller in writing of any discrepancies.
2. Evidence Requirements: Claims must be supported by dated photographs of damaged coils, packaging condition upon unpacking, carrier delivery receipts, and any third-party inspection reports.
3. Liability Determination: If damage is attributable to improper handling by the carrier (dropping, rolling, inadequate securing), the seller will assist the buyer in filing a claim against the carrier under the Bill of Lading terms. If damage is attributable to insufficient packaging by the seller, full replacement or credit is provided.
4. Resolution Timeline: Claims must be resolved within 30 calendar days of initial notification; unresolved disputes may be escalated to arbitration per the governing law clause.

Applications

Stainless steel coil tubes from Wenzhou Jixing Metal Materials Co., Ltd. serve a broad spectrum of industrial applications:

• Heat Exchangers & Boilers: Shell-and-tube heat exchangers, condensers, evaporators, and superheaters in power generation and petrochemical plants.
• Chemical Processing: Reactor tubing, distillation columns, and piping systems handling aggressive acids, alkalis, and halogenated compounds.
• Food & Beverage: CIP (Clean-in-Place) compatible tubing for dairy, brewing, and pharmaceutical-grade fluid transfer systems.
• Pharmaceutical: GMP-compliant tubing for sterile processing, CIP/SIP systems, and bioreactor instrumentation.
• Automotive & Aerospace: Exhaust systems, fuel lines, hydraulic circuits, and high-temperature exhaust manifolds.
• Oil & Gas: Downhole tubing, wellhead assemblies, and subsea manifold components.
• Energy & Power: Solar thermal collector tubing, geothermal heat exchangers, and nuclear-grade instrumentation lines.

Quality Certifications & Standards Compliance

Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management infrastructure ensuring full traceability and regulatory compliance:

• ISO 9001:2015 — Quality Management System certification covering all manufacturing, inspection, and logistics operations.
• ISO 14001:2015 — Environmental Management System demonstrating commitment to sustainable manufacturing practices.
• Product Standards: ASTM A213 / A269, EN 10217-7, GB/T 12771, JIS G3459.
• Mill Test Certificates (MTC): Full chemical and mechanical test data provided per EN 10204 3.1 certification for every shipment.
• Third-Party Inspection: Available upon request — SGS, BV, or TÜV pre-shipment inspection programs.
• NACE MR0175 / ISO 15156: Compliance available for sour service applications (H₂S environments).
• PED 2014/68/EU: Pressure Equipment Directive compliance for EU market supply.

Unique Selling Points

• Zero-Damage Delivery Guarantee: The multi-layer packaging system (wooden crate + dividers + stretch wrap) is specifically engineered to eliminate transport damage, backed by contractual appearance acceptance standards and transparent claim provisions.
• End-to-End Risk Mitigation: From manufacturing through final delivery, every handling node is controlled and documented — a rarity in the coil tube supply chain.
• Full Traceability: Every coil is traceable to its mill heat number, chemical composition, mechanical test results, and individual inspection records.
• Flexible Coil Configuration: Custom coil lengths, core diameters, and surface finishes available to match specific downstream processing requirements.
• Competitive Lead Times: Leveraging Wenzhou's position in China's stainless steel supply cluster ensures rapid sourcing and delivery compared to inland manufacturers.

Technical Support & Ordering

Wenzhou Jixing Metal Materials Co., Ltd. provides dedicated technical support for coil tube selection, packaging configuration, and logistics planning. Customers are encouraged to specify surface finish requirements, coil dimensions, and destination port conditions at the quotation stage to ensure optimal packaging and handling protocol is applied from the outset.

For detailed specification sheets, material test certificates, and packaging photographs, contact the sales engineering team with Product Reference No. 211 and your specific application parameters.