Stainless Steel Coil Tube (Coiltube) — Precision Engineered for Industrial Applications

Product Overview

Wenzhou Jixing Metal Materials Co., Ltd. presents a premium-grade Stainless Steel Coil Tube (Coiltube) product line designed to meet the exacting demands of industrial manufacturing, heat transfer, and process engineering applications. Supplied in continuous coil form, these tubes offer superior material utilization, reduced cutting waste, and streamlined downstream processing — making them an economically advantageous alternative to cut-length seamless or welded tubing.

The Coiltube product line is manufactured to international standards including ASTM, ASME, EN, JIS, and GB, with available grades spanning austenitic, duplex, and precipitation-hardening stainless steels. The continuous coil configuration enables high-throughput production, automated forming, and efficient logistics, positioning this product as a cornerstone material for cost-conscious yet quality-driven procurement strategies.

Material & Properties

Available Grades

Key Mechanical Properties (Typical — Grade 304/304L)

Key Mechanical Properties (Typical — Grade 316/316L)

Surface Finishes

Specifications

Parameter Specification / Range
Outer Diameter (OD) 3.18 mm (1/8") – 114.3 mm (4.5")
Wall Thickness 0.4 mm (0.016") – 6.0 mm (0.236")
Coil Inner Diameter 50 mm (2") – 300 mm (12")
Coil Length per Spool Up to 1,200 m (3,937 ft) or custom per order
Coil Weight per Spool Up to 2,500 kg (5,512 lbs)
Tolerance — OD ±0.05 mm to ±0.15 mm (per ASTM A213 / A269)
Tolerance — Wall Thickness ±10% or ±0.025 mm, whichever is greater
Applicable Standards ASTM A213, A269, A778; ASME SA-213, SA-269; EN 10216-5; JIS G3459; GB/T 12771
End Treatment Plain end, beveled end, or custom
Packaging Export-grade wooden crates or steel banding with protective wrapping

Manufacturing Process

Wenzhou Jixing Metal Materials Co., Ltd. employs a vertically integrated manufacturing approach that ensures consistent quality from raw material input through final coil packaging:

  1. Raw Material Selection: Ingot or strip material sourced from certified mills with full traceability. Chemical composition verified via spectrometric analysis prior to processing.
  2. Strip Annealing & Pickling: Cold-rolled strip undergoes controlled annealing to achieve desired mechanical properties, followed by acid pickling and passivation to remove oxide scale and restore corrosion resistance.
  3. Precision Slitting: High-speed slitting lines produce strips of exact width to minimize yield loss and ensure uniform coil tube wall thickness.
  4. Tube Forming: Formed via ERW (Electro Resistance Welding), autogenous welding, or orbital welding processes depending on grade and specification requirements. Forming rollers are precision-machined to maintain dimensional accuracy throughout the coil length.
  5. Post-Weld Heat Treatment: Weld annealing eliminates residual stresses and ensures full austenitization, particularly critical for 316L and duplex grades.
  6. Internal/External Bright Annealing: For BA-finish tubes, controlled-atmosphere annealing in a reducing or vacuum environment produces a clean, oxide-free surface suitable for sanitary and high-purity applications.
  7. Hydrostatic Testing: Every coil length undergoes 100% hydrostatic pressure testing to verify weld integrity and structural soundness.
  8. Dimensional Inspection: Automated OD and wall-thickness gauging with continuous data logging ensures compliance with specified tolerances.
  9. Coiling & Packaging: Tubes are coiled onto precision mandrels, protected with moisture-absorbent desiccants and VCI (Volatile Corrosion Inhibitor) paper, and secured for export-grade transit.

Applications

Primary Industrial Applications

Quality Certifications

Wenzhou Jixing Metal Materials Co., Ltd. maintains comprehensive quality management systems and product certifications to assure customers of consistent, reliable performance:

Unique Selling Points

Dynamic Price Linkage Mechanism — Transparent & Equitable Procurement

A distinguishing feature of Wenzhou Jixing Metal Materials Co., Ltd.'s Coiltube offering is its LME Nickel Price-Linked Pricing Formula, which provides customers with unprecedented cost transparency and protection against raw material volatility:

Nickel constitutes approximately 60% of the raw material cost for Grade 304 and approximately 70% of the raw material cost for Grade 316L stainless steel coil tubes. Given the inherent volatility of LME (London Metal Exchange) nickel pricing, Wenzhou Jixing has established a transparent price linkage formula that adjusts contract pricing on a monthly or quarterly basis, aligned with LME nickel benchmarks.

This mechanism delivers the following competitive advantages:

Additional Differentiators

Ordering & Technical Support

For detailed quotations, sample requests, or technical consultation regarding stainless steel coil tube specifications, material selection, or pricing formula parameters, customers are encouraged to contact the Wenzhou Jixing Metal Materials Co., Ltd. technical sales team. Custom quotations are prepared within 48 hours of receiving complete specification requirements, including grade, dimensions, quantity, surface finish, applicable standards, and desired pricing review cycle.