GRP Partition &
Baffle Walls
Corrosion-resistant glass fibre reinforced plastic partition and baffle wall systems for water tanks, sewage structures, process vessels, and modular enclosures — engineered for structural performance in chemically aggressive environments.
INTRODUCTION
GRP partition walls are structural dividing elements fabricated from glass fibre reinforced plastic and installed within water storage tanks, sewage sumps, process vessels, and modular enclosures to divide a single volume into multiple compartments. Baffle walls are perforated or slotted GRP panels installed to direct, slow, or distribute fluid flow within a tank — commonly used in water treatment sedimentation tanks, chlorine contact chambers, and sewage detention systems.
Unlike concrete or steel alternatives, GRP partition and baffle walls are inherently non-corrosive, require no surface coating, and can be fabricated and pre-drilled to exact tolerances before delivery to site, minimising installation time and on-site labour. ESA Technical Services designs, fabricates, and installs GRP partition and baffle systems to BS 4994 and project-specific structural briefs.
ENGINEERING & MANUFACTURE PROCESS
| 01 | Structural Design | Wall geometry, hydrostatic loading, spanning arrangement, and connection detail designed per BS 4994 / client brief. Deflection, stress, and buckling checked for all load cases. |
| 02 | Material Specification | Resin system, glass reinforcement type, and laminate schedule selected based on chemical exposure, temperature, and structural loading requirements. |
| 03 | Factory Fabrication | Panels fabricated under controlled conditions. Perforations, slots, and penetrations CNC-machined to dimensional drawings. Edges sealed and gel-coated to prevent moisture ingress into laminate. |
| 04 | QA & Testing | Laminate thickness, glass content, and surface finish verified on each panel. Hydraulic proof-load test performed on structural connection zones where specified. |
| 05 | Site Installation | Panels delivered to site and installed using stainless steel anchor channels, chemical anchors, or through-bolted connections. Panel-to-panel joints laminated in-situ for continuous structural sections. |
| 06 | Leak Test | Completed installation flood-tested to full service water level before tank commissioning. All joints verified watertight. Any seepage points repaired and re-tested. |
TECHNICAL SPECIFICATIONS
| Base Material | GRP — Chopped strand mat / Woven roving composite |
| Resin System | Isophthalic polyester / vinyl ester / epoxy (chemical grade) |
| Panel Thickness | 6–25 mm (structural load and span dependent) |
| Design Standard | BS 4994, AWWA D120, EN 13121 |
| Compressive Strength | ≥ 100 MPa (ASTM D695) |
| Flexural Strength | ≥ 150 MPa (ASTM D790) |
| Chemical Resistance | pH 2–12 (isophthalic) / pH 0–14 (vinyl ester) |
| Surface Finish | Smooth internal gel coat — potable water grade available |
| Connections | A4 SS bolts / GRP angle cleats / in-situ GRP lamination |
| Panel Max Size | 3,600 × 1,200 mm standard (larger by arrangement) |
| Colour | White / Light Grey standard — RAL colour to order |
KEY BENEFITS
Corrosion-Free for Life
GRP requires no internal coating, lining, or cathodic protection in water or chemical service — eliminating periodic maintenance and tank-emptying for refurbishment.
Lightweight & Easy to Install
GRP panels are 70–80% lighter than equivalent concrete elements, reducing crane requirements and simplifying installation in confined or access-restricted tank interiors.
Precision Fabrication
CNC-machined panels deliver exact opening patterns, slot geometries, and connection hole locations — critical for performance of sedimentation and contact chamber baffles.
Hydraulic Optimisation
Baffle perforation patterns are designed by our engineers to achieve target hydraulic retention times and short-circuit prevention per water treatment design requirements.
Chemical Compatibility
Resin system selected to match the specific chemical exposure of each application — from potable water to aggressive industrial chemicals.
Full Technical Support
ESA provides design calculations, shop drawings, installation supervision, and as-built documentation for every partition and baffle wall project.
APPLICATIONS
ESA
Request a Partition & Baffle Wall Design
Share your tank dimensions, fluid type, and flow requirements — we will prepare a design and indicative cost.