Stainless Steel Coil Tube — Burst Pressure Verified
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. delivers high-performance stainless steel coil tubes engineered for demanding industrial applications requiring superior pressure resistance, corrosion durability, and structural integrity. Every coil tube product line undergoes rigorous type testing, including burst pressure testing—a critical R&D and qualification verification procedure that pressurizes the tube beyond its working limit until rupture occurs. This destructive test determines the actual burst pressure and the corresponding safety factor, providing definitive proof of the tube's mechanical strength and pressure containment capability.
Unlike routine factory inspection items, burst testing is conducted as a type test during product development, design validation, and periodic qualification audits. The results establish a verified safety margin that assures customers of consistent, reliable performance across every production lot.
Material & Properties
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 904L, and custom alloy specifications
- Form: Seamless and welded coil tubes, supplied in continuous coil configuration for downstream processing
- Surface Finish: Bright annealed (BA), polished, or matte finish per customer specification
- Corrosion Resistance: Excellent resistance to oxidation, pitting, and general corrosion in aggressive chemical environments
- Mechanical Properties: High tensile strength, elongation, and yield strength validated through burst testing to confirm pressure-bearing capacity
- Temperature Range: Suitable for cryogenic to high-temperature service depending on alloy grade
Specifications
| Parameter | Specification |
|---|---|
| Outer Diameter (OD) | 6.00 mm – 50.80 mm (custom sizes available) |
| Wall Thickness | 0.50 mm – 3.00 mm |
| Coil Length | Up to 50 m per coil (custom lengths available) |
| Manufacturing Standard | ASTM A213, ASTM A269, ASME SB75, EN 10216-5, GB/T 12771 |
| Burst Test Method | Hydrostatic pressure applied incrementally until tube rupture; actual burst pressure recorded |
| Safety Factor Determination | Burst pressure divided by maximum allowable working pressure (MAWP) to verify design margin |
| Testing Classification | Type test / R&D verification — not a routine per-lot factory test |
| Acceptance Criteria | Minimum burst pressure must exceed calculated value per applicable code (e.g., ASME, EN) with required safety factor |
Manufacturing Process
- Raw Material Selection: Certified stainless steel round bars or strip from approved mills with full chemical and mechanical traceability.
- Piercing & Seamless Forming: Hot or cold piercing of steel billets followed by multi-stand rolling to achieve precise OD and wall dimensions.
- Heat Treatment: Solution annealing to relieve residual stresses and restore optimal corrosion resistance and mechanical properties.
- Precision Sizing: Cold drawing or rolling to final dimensions with tight tolerance control.
- Surface Finishing: Acid pickling, passivation, and/or mechanical polishing to achieve specified surface quality.
- Coiling: Continuous tube is wound into coils of specified diameter and length for efficient downstream fabrication.
- Quality Inspection: Dimensional verification, chemical composition analysis, and non-destructive testing (eddy current, ultrasonic).
- Burst Pressure Type Test: Representative samples are pressurized to rupture to validate burst strength and confirm safety factor compliance with design codes.
Applications
- Heat Exchangers & Condensers: Coil tubes serve as efficient heat transfer elements in shell-and-tube exchangers, air coolers, and evaporators.
- Chemical Processing: Resistance to aggressive acids, alkalis, and chlorides makes these tubes ideal for reactor internals, transfer lines, and heat exchangers in chemical plants.
- Food & Beverage Industry: Hygienic-grade coil tubes used in pasteurizers, condensers, and CIP systems requiring high purity and easy cleanability.
- Pharmaceutical Manufacturing: GMP-compliant tubing for sterilization systems, fluid transfer, and process equipment.
- Automotive & HVAC: Compact coil configurations for radiators, intercoolers, and climate control systems.
- Petroleum & Energy: Downhole tubing, wellhead assemblies, and high-pressure fluid handling in oil and gas extraction.
- Power Generation: Boiler tubes, superheater coils, and feedwater systems in thermal and nuclear power plants.
Quality Certifications & Testing
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management system aligned with international standards:
- ISO 9001:2015 — Quality Management System certification
- ISO/TS 22163 — Automotive industry quality management (where applicable)
- EN 10204 3.1/3.2 — Material certification documentation per customer requirement
- NACE/AMPP — Corrosion resistance compliance for oil and gas applications
- Pressure Vessel Code Compliance: Burst test results documented per ASME Section VIII / EN 13445 requirements
Why Choose Wenzhou Jixing — Burst Test Verified Reliability
"We don't just test to specification — we test to destruction."
- Proven Safety Margins: By pressurizing tubes to actual rupture, we confirm that every design delivers a verified safety factor far exceeding minimum code requirements — giving customers absolute confidence in pressure integrity.
- Type Test Rigor: Burst testing as a formal type qualification ensures that material selection, manufacturing process, and dimensional design are validated at the fundamental level, not merely spot-checked.
- Full Traceability: Every coil tube lot is traceable to raw material mill certificates, heat numbers, and test reports — including burst test documentation for qualified designs.
- Custom Engineering Support: Our R&D team collaborates with customers to define burst pressure targets, safety factors, and applicable codes for specialized applications.
- Comprehensive Non-Destructive Inspection: Beyond burst type testing, every coil undergoes eddy current and ultrasonic examination to detect internal and surface defects — ensuring only defect-free product reaches the customer.
Wenzhou Jixing Metal Materials Co., Ltd. is committed to delivering stainless steel coil tubes that combine precision manufacturing, proven pressure performance, and rigorous quality verification — engineered to perform reliably in the world's most demanding industrial environments.