Polymer-Lined Pressure Vessels
Polymer-lined pressure vessels combine metallic pressure containment with specialized fluoropolymer or thermoplastic linings for applications requiring ultra-high purity or resistance to aggressive chemicals. Roben Manufacturing engineers custom vessels with PTFE, PFA, PVDF, polypropylene, and other polymer linings for semiconductor chemicals, hydrofluoric acid service, ultra-pure water, and applications where metallic contamination must be eliminated.
Application Importance
Semiconductor manufacturing, pharmaceutical production, and specialty chemical applications often require absolute freedom from metallic contamination. Polymer linings provide the chemical resistance and purity required for these demanding applications while allowing metallic vessel construction for pressure containment and structural integrity. Different polymer selections address specific temperature ranges, chemical compatibility, and purity requirements. Roben Manufacturing provides expertise in polymer selection and lining system design for specific applications.
Design Requirements
- Polymer selection for chemical service
- Proper substrate surface preparation
- Lining attachment method specification
- Thermal expansion accommodation
- Spark testing and holiday detection
- Temperature and pressure limitations
- Nozzle and penetration details
- Repair and maintenance provisions
Recommended Materials
- PTFE (polytetrafluoroethylene)
- PFA (perfluoroalkoxy)
- PVDF (polyvinylidene fluoride)
- ECTFE (ethylene chlorotrifluoroethylene)
- Polypropylene
- HDPE (high-density polyethylene)
- Rubber linings (abrasion service)
Industries Served
- Semiconductor Manufacturing
- Pharmaceutical Manufacturing
- Electronic Chemicals
- Specialty Chemicals
- Ultra-Pure Water Systems
- Battery Manufacturing
- Photovoltaic Production
Certifications & Compliance
All Roben vessels are designed and manufactured in accordance with:
- ASME Boiler and Pressure Vessel Code Section VIII
- SEMI Standards (semiconductor applications)
- FDA 21 CFR Part 211 cGMP Guidelines
- ISO 9001 Quality Management System
- ASTM D4787 Continuity Testing
Roben Manufacturing Expertise
With over 65 years of pressure vessel fabrication experience, Roben Manufacturing has developed specialized expertise in polymer-lined vessel design and fabrication. We work with qualified lining applicators to ensure proper substrate preparation, application technique, and quality verification. Our engineering team helps customers select appropriate polymers and lining systems for specific purity and chemical compatibility requirements.
Frequently Asked Questions
What is the difference between PTFE and PFA linings?
PTFE is applied as a sprayed and sintered coating with some porosity, while PFA can be melt-processed for lower permeability and better conformance to complex shapes. PFA offers higher purity for semiconductor applications, while PTFE provides good performance at lower cost for many chemical applications.
What are the temperature limitations of polymer linings?
PTFE and PFA are rated to approximately 450°F (232°C), PVDF to 275°F (135°C), and polypropylene to 200°F (93°C). Operating temperature and pressure must be considered together as polymer strength decreases with temperature.
How is lining integrity verified?
All polymer linings undergo spark testing (holiday detection) at appropriate voltages to identify any discontinuities. Testing is documented and repeated after any mechanical work on the vessel. Regular in-service inspection protocols are recommended.
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Request a Quote for Polymer-Lined Pressure Vessels
Contact Roben Manufacturing to discuss your polymer-lined pressure vessels requirements.
Phone: (732) 364-6000
Email: sales@robenmfg.com
Address: 760 Vassar Avenue, Lakewood, NJ 08701
www.robenmfg.com
