ASME BPE Compliant Sanitary Stainless Steel Coil Tube for Bioprocessing
Product Overview
The ASME BPE Compliant Sanitary Stainless Steel Coil Tube is a precision-engineered coil tube product designed specifically for the demanding requirements of the biopharmaceutical and bioprocessing industries. Manufactured by Wenzhou Jixing Metal Materials Co., Ltd., this product adheres to the rigorous ASME BPE (Bioprocessing Equipment) standard, which sets the global benchmark for sanitary design, material integrity, and process validation in biotechnology applications.
Unlike conventional industrial coil tubes, this product is engineered with a complete sanitary-grade design philosophy that ensures ease of cleaning, minimal product retention, and full traceability from raw material through final delivery. It is ideal for use in heat exchangers, reactors, sterilization systems, and process piping within aseptic manufacturing environments.
Material & Properties
Wenzhou Jixing Metal Materials Co., Ltd. offers coil tubes fabricated from the following premium austenitic stainless steel grades, each selected to meet or exceed ASME BPE material specifications:
- 316L (UNS S31603) — Enhanced corrosion resistance with low carbon content; the preferred grade for aggressive pharmaceutical and bioprocess media.
- 304L (UNS S30403) — Excellent general corrosion resistance and formability; suitable for less aggressive process environments.
- 316L Mo (UNS S31603) — For applications requiring additional molybdenum content for superior pitting and crevice corrosion resistance.
Key material properties include:
- Low carbon content (≤0.03% C) to prevent intergranular corrosion during welding
- Non-magnetic or near-non-magnetic behavior in annealed condition
- High purity with strict control of sulfur, phosphorus, and nitrogen impurities
- Full chemical and mechanical property certification per lot
Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Material Grades | 316L, 304L, 316L Mo | ASME BPE compliant |
| Surface Finish | Electro-polished, Ra ≤ 0.5 μm (≤ 0.2 μm available upon request) | Critical for cleanability and preventing microbial adhesion |
| Tube Diameter | Ø6 mm – Ø114 mm (custom sizes available) | Seamless or welded per application |
| Wall Thickness | 0.5 mm – 4.0 mm | Tolerance ±10% or per drawing |
| Coil Diameter | Ø300 mm – Ø2000 mm | Custom coil winding available |
| Minimum Bend Radius | 3D (3 × outer diameter) | Prevents kinking and maintains sanitary geometry |
| End Condition | Plain, beveled, or sanitary fittings (Tri-Clamp, DDE) | Custom end prep per customer specification |
| Heat Treatment | Solution annealed and pickled | Ensures full recrystallization and corrosion resistance |
| Applicable Standards | ASME BPE, ASTM A213/A269, EN 10216-5 | Full multi-standard compliance |
Manufacturing Process
The production of ASME BPE compliant coil tubes at Wenzhou Jixing Metal Materials Co., Ltd. follows a tightly controlled, multi-stage manufacturing process designed to eliminate contamination and ensure dimensional accuracy:
- Raw Material Selection & Inspection — Only certified, low-carbon austenitic stainless steel billets or seamless tubes from approved mills are accepted. Each incoming lot undergoes full chemical analysis and mechanical testing with complete documentation retained.
- Precision Forming & Coil Winding — Tubes are formed and wound into coil configurations using CNC-controlled equipment with calibrated tooling. Minimum bend radii are strictly maintained to prevent wall thinning, ovality, or surface damage.
- Welding (if applicable) — Where welded joints are required, orbital GTAW (Gas Tungsten Arc Welding) is employed with inert gas back-purging to produce smooth, uniform weld beads free of oxidation and inclusions.
- Solution Annealing & Pickling — All tubing is solution annealed at controlled temperatures followed by acid pickling to remove scale and restore full corrosion resistance and crystallographic integrity.
- Electro-Polishing — The final surface is electro-polished to achieve a mirror-like finish with Ra values as low as 0.2 μm. This process removes surface contaminants, eliminates micro-pores, and enhances passive layer formation.
- Final Inspection & Cleaning — Each coil tube undergoes dimensional verification, surface roughness measurement, visual inspection, and optional eddy current or hydrostatic testing. Final cleaning is performed in a controlled environment to prevent post-processing contamination.
Applications
ASME BPE compliant coil tubes are indispensable components in the following biopharmaceutical and related applications:
- Bioreactor Heat Exchange Systems — Temperature control coils for fed-batch and continuous bioreactors requiring precise thermal management.
- Sterilization-in-Place (SIP) & Cleaning-in-Place (CIP) Loops — Coil tubing integrated into process piping for steam sterilization and caustic/acid cleaning cycles.
- Downstream Processing Equipment — Heat exchangers in chromatography, filtration, and concentration systems where product purity is critical.
- Cell Culture & Bioprocessing Plants — Aseptic transfer lines, condensate recovery systems, and utility piping within GMP-regulated facilities.
- Vaccine & Biologics Manufacturing — Components in single-use and reusable systems for mRNA, monoclonal antibody, and recombinant protein production.
- Medical Device Manufacturing — Clean-in-place loops and heat exchange elements in the production of implantable and injectable medical devices.
Quality Certifications & Documentation
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management system aligned with international pharmaceutical standards. Key certifications and quality commitments include:
- ASME BPE Compliance — Products are designed, manufactured, and documented in accordance with ASME BPE (Bioprocessing Equipment) standards, the recognized global standard for sanitary equipment in bioprocessing.
- ISO 9001:2015 — Certified quality management system ensuring consistent product quality and continuous improvement.
- ISO 14001:2015 — Environmental management system certification demonstrating sustainable manufacturing practices.
- ISO 22000 / HACCP — Food safety management system relevant to pharmaceutical-grade material handling.
- Full Document Traceability System — Every coil tube is accompanied by a complete traceability dossier including: mill certificates, heat numbers, chemical analysis reports, mechanical test results, welding procedure qualifications (WPQR), non-destructive test reports, surface finish measurements, and dimensional inspection records.
- Third-Party Inspection — Available upon request from recognized inspection bodies (e.g., SGS, Bureau Veritas, TÜV) for independent verification.
Unique Selling Points
- True ASME BPE Compliance — Not merely marketed as "sanitary," but fully designed and documented to the ASME BPE standard, providing regulatory confidence for FDA, EMA, and MHRA submissions.
- Ultra-Low Surface Roughness — Electro-polished surfaces with Ra ≤ 0.5 μm (available down to 0.2 μm) minimize biofilm formation and enable effective CIP/SIP cycles.
- End-to-End Traceability — Complete batch-level documentation from raw material mill to finished product, supporting regulatory audits and quality investigations.
- Custom Engineering Capability — Flexible production parameters (diameter, wall thickness, coil size, end prep, surface finish) tailored to specific bioprocess requirements.
- Sanitary Design Integrity — Weld-free coil construction (seamless) or orbital-welded configurations eliminate crevices and dead legs, reducing contamination risk.
Note: All products are manufactured in a controlled environment with strict personnel hygiene protocols, dedicated tooling, and clean packaging (VCI film or polyethylene wrapping) to prevent contamination prior to installation. Custom specifications, sample programs, and technical consultation are available upon request.