Severe Chemical Compatibility Profile
PVDF + FRP dual laminate construction is specifically selected when conventional metallic tanks (SS316L, Hastelloy) or standard polyolefins (HDPE, PP) suffer from chemical attack, stress cracking, or thermal degradation.
The Dual-Laminate Composite Principle
A PVDF + FRP storage tank unites two distinct, complementary material layers into a single monolithic vessel wall:
1. PVDF Chemical-Contact Barrier (3-5 mm)
Polyvinylidene Fluoride provides a mirror-smooth, fluorinated wetted surface with outstanding chemical resistance against hot halogens, oxidizing acids, and high-purity solvents.
2. FRP Structural Composite Reinforcement
Multi-layered vinyl ester resin (Derakane 411/470 equivalent) reinforced with E-Glass structural roving, providing mechanical load-bearing strength and seismic wind resistance.
Available Configurations & Orientations
ASK Innocomp engineers and custom fabricates PVDF + FRP vessels tailored to plant footprints and process requirements:
- Vertical PVDF + FRP Storage Tanks: Flat bottom or conical bottom for efficient liquid drainage and minimal floor area utilization.
- Horizontal Tanks with Dished Ends: Low-profile storage for height-restricted containment dykes and indoor processing halls.
- Custom Process Reaction Vessels: Fitted with internal heating coils, agitator bridges, baffle plates, and multiple nozzle flanged connections.
- Pressurized Filter Vessels: ASME-compliant dual-laminate filter columns rated for positive pressure and full vacuum service.
Technical Specifications & Design Parameters
| Engineering Parameter | Standard Specification |
|---|---|
| Internal Liner Material | PVDF (Polyvinylidene Fluoride - Solef / Kynar Grade) 3.0 mm to 5.0 mm |
| Structural Resin Matrix | Vinyl Ester Resin (Derakane 411 / 470 equivalent) with E-Glass roving |
| Design Codes | German DVS 2205 (Thermoplastic design) / BS 4994 / ASME RTP-1 |
| Operating Temperature | Continuous service from -40°C up to +120°C |
| Capacity Range | 500 Litres to 100,000 Litres (0.5 KL to 100 KL) |
| Welding Technology | Hot Gas Extrusion Welding & Automated Butt Welding with conductive backing strip |
| Quality Testing | 100% 20,000V High-Voltage Spark Leak Testing + 24-Hour Hydrostatic Test |
Target Industrial Sectors
Chemical Processing
Hot HCl, Chlorine & Nitric Acid containment
Pharmaceuticals
High-purity solvent & reactant storage
Chlor-Alkali Plants
Wet chlorine gas & brine electrolysis
Electroplating Lines
Acid pickling & precious metal plating baths
Semiconductor
Ultra-pure water (UPW) & etching chemicals
ETP & Wastewater
Aggressive effluent neutralization sumps