Stainless Steel Coil Tube (盘管) — Aerospace Furnace Water-Cooled Wall Application

Product Overview

The Stainless Steel Coil Tube (盘管Coiltube) manufactured by Wenzhou Jixing Metal Materials Co., Ltd. is a precision-engineered continuous tubular product specifically designed for high-temperature, high-pressure industrial environments. This product is particularly notable for its application in Aerospace Furnace Water-Cooled Wall Systems (航天炉水冷壁系统), where it serves as a critical heat-exchange and structural component. The coil tube is supplied in a continuous coiled configuration, enabling efficient storage, transportation, and on-site installation without the need for field welding of multiple pipe segments.

Based on extensive research into burnout failure analysis (烧损原因分析) and preventive measures (预防措施) for water-cooled wall coil tubes in aerospace-grade furnaces, this product has been optimized to address common failure modes including thermal fatigue cracking, corrosion-induced wall thinning, and high-temperature oxidation.

Material & Properties

The coil tube is fabricated from high-performance stainless steel alloys engineered to withstand extreme thermal and mechanical conditions. Key material characteristics include:

Specifications

Parameter Specification
Product Name Stainless Steel Coil Tube (盘管Coiltube)
Product Code 311
Material Grades SUS310S, SUS309, SUS316L, T91 (custom alloys available)
Outer Diameter (OD) 12 mm – 159 mm (customizable)
Wall Thickness 0.5 mm – 6.0 mm
Coil Inner Diameter (ID) 400 mm – 1200 mm
Coil Length per Roll 50 m – 500 m (continuous)
Surface Finish Mirror polished (Ra ≤ 0.4 μm), Pickled & Passivated (P&P), or Sandblasted
Manufacturing Standard ASTM A213, ASTM A269, GB/T 12771, EN 10216-5
Maximum Operating Pressure Up to 35 MPa (5000 PSI)
Maximum Operating Temperature 1100°C (2012°F) sustained
Welding Compatibility Fully weldable (TIG, MIG, Resistance); heat-affected zone (HAZ) resistant
Non-Destructive Testing (NDT) Eddy Current Testing (ECT), Ultrasonic Testing (UT), Hydrostatic Testing
Delivery Condition Coiled, annealed, passivated

Manufacturing Process

The production of this stainless steel coil tube follows a rigorous multi-stage manufacturing process to ensure dimensional accuracy, metallurgical integrity, and surface quality:

  1. Hot Rolling / Seamless Forming: Billet material is hot-rolled or formed through a seamless piercing process to achieve the initial tubular geometry with uniform wall thickness.
  2. Cold Drawing / Cold Pilgering: The tube is cold-worked through precision dies to achieve exact dimensional tolerances (±0.05 mm for OD) and enhanced mechanical properties.
  3. Solution Annealing: The tube is heated to 1050°C – 1150°C and rapidly quenched to dissolve carbide precipitates, restore full austenitic microstructure, and relieve residual stresses.
  4. Pickling & Passivation (P&P): Chemical treatment removes scale, oxide layers, and surface contaminants, establishing a protective chromium oxide passive film.
  5. Coiling: The continuous tube is wound onto precision mandrels to form the coil configuration with controlled springback and minimal residual deformation.
  6. Quality Inspection: Each coil undergoes comprehensive NDT including eddy current testing for wall thickness verification, ultrasonic testing for internal defect detection, and hydrostatic pressure testing at 1.5× working pressure.

Applications

This coil tube product is deployed across a wide range of demanding industrial applications:

Quality Certifications & Compliance

Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management system ensuring product traceability and compliance with international standards:

Unique Selling Points