- +91 90165 86186 / +91 70431 70434
- Mon - Fri : 09.00-17.00
FRP/GRP HEADERS
FRP/GRP HEADERS
FRP/GRP Headers and Manifolds are engineered flow-distribution components designed to collect, combine or distribute fluids evenly across process pipelines. These components are built for corrosive, high-humidity and chemically aggressive environments where metallic manifolds corrode rapidly or require frequent maintenance.
SREX Composites manufactures FRP/GRP headers, distribution manifolds, anolyte headers, catholyte headers, inlet/outlet headers and custom multi-port assemblies tailored for chemical plants, desalination units, electro chlorination systems, filtration modules, and water-treatment networks.
Our FRP/GRP header systems deliver reliable flow balancing, uniform pressure distribution and long service life in applications where corrosion-resistance and structural stability are essential.
What Are Headers and Manifolds?
Headers (also known as manifolds) serve as the main conduit used to:
- Distribute incoming flow evenly to multiple downstream pipelines
- Collect flow from multiple lines into a single outlet
- Maintain pressure uniformity across cross-connected systems
- Provide stable flow to filtration media, membrane modules, scrubbers or reactors
FRP/GRP headers are widely preferred due to their superior corrosion resistance, structural durability and compatibility with varying process fluids.
Why FRP/GRP Material for Headers?
✔ Corrosion-Proof Construction
FRP/GRP headers resist:
- Acids
- Alkalis
- Chlorinated streams
- Brine and seawater
- Industrial chemicals and vapours
✔ Lightweight & Easy to Install
Significantly lighter than metal headers, allowing:
- Lower civil and structural load
- Easier handling during installation
- Faster maintenance
✔ Excellent Hydraulic Behaviour
Smooth internal surface ensures:
- Low friction loss
- Uniform flow distribution
- Minimal scaling and deposition
✔ Tailor-Made Configurations
Customizable in:
- Diameter
- Port quantity
- Orientation (top entry / bottom entry / side port / radial)
- Length
- Thickness
- Operating pressure and temperature
Types of FRP/GRP Headers Manufactured
1. FRP/GRP Distribution Headers
Used to divide flow across multiple lines in:
- Filter beds
- Multimedia filters
- Activated carbon units
- Resin columns
- Chlorination systems
2. FRP/GRP Collection Headers
Designed to collect fluid evenly from:
- Membrane housings
- Ion-exchange units
- Biological treatment reactors
3. FRP/GRP Inlet/Outlet Headers
Used in:
- DM/RO plants
- WTP/ETP/STP units
- Chemical dosing systems
4. FRP Anolyte & Catholyte Headers
Specialized for:
- Electrochlorination
- Electrolysis cells
- Marine chlorine generation systems
Engineered to withstand highly corrosive anolyte and catholyte streams.
5. High-Flow FRP/GRP Manifolds
Used in:
- Large cooling water circuits
- Firewater distribution networks
- Industrial fluid distribution skids
- Desalination pretreatment and post-treatment modules
Engineering & Construction
Material System
- Reinforced fiberglass composite
- Resin matrix tailored to application (Isophthalic, Bisphenol-A, Vinyl Ester)
- Optional thermoplastic lining for extreme chemical exposure
Manufacturing Techniques
- Filament wound central header section
- Hand-layup or filament wound branch connections
- Tapered or reinforced joints
- Internal and external corrosion-resistant topcoats
Port Integration
- Moulded branch connections
- Flanged nozzles
- Stub-in or stub-out integrations
- Reinforced collars for pressure stability.
Applications of FRP/GRP Headers
FRP/GRP headers are used in:
Water & Wastewater Treatment
- RO plant headers
- UF/MF membrane system manifolds
- Filter inlet/outlet manifolds
- Chlorination and dosing headers
Chemical Industries
- Chemical mixing and distribution headers
- Acid and alkali handling networks
- Scrubber and gas-washing equipment
Power & Desalination
- Seawater intake/distribution headers
- Brine disposal manifolds
- Cooling water distribution
Electrochemical Systems
- FRP anolyte headers
- FRP catholyte headers
- Sodium hypochlorite generation units
Industrial Process Plants
- Multi-line process distribution
- Slurry and wastewater collection
- Chemical neutralization systems
Advantages of FRP/GRP Headers
- High corrosion resistance
- Long service life
- Excellent hydraulic efficiency
- Customizable for any flow pattern
- High mechanical integrity
- Abrasion-resistant interior
- Lightweight & non-metallic construction
- Easy installation and low maintenance
Design & Testing Standards Used
Depending on service, SREX Composites manufactures headers as per:
- ASTM D3299 / D4097 – filament wound & contact molded
- ASTM D5925 – FRP fittings
- BS 4994 – design guidelines for FRP vessels & components
- AWWA standards for non-metallic piping manifolds
- ISO / DIN standards for composite structures.
Quality Assurance
At SREX Composites, quality assurance for FRP/GRP Headers and Manifolds is focused on ensuring uniform flow distribution, structural integrity, and long-term corrosion resistance in demanding industrial and chemical service conditions. Each header assembly is manufactured under controlled processes to deliver consistent hydraulic performance and reliable service life.
Raw Material Inspection
- Incoming inspection of resins, glass reinforcements, catalysts, and additives
- Verification of resin systems selected for specific chemical environments (acidic, chlorinated, brine, or mixed media)
- Controlled storage of raw materials to maintain consistency and shelf life
Manufacturing & Process Control
- Controlled filament winding and hand lay-up processes for header barrels and branch connections
- Monitoring of laminate thickness, glass-to-resin ratio, and corrosion barrier layers
- Reinforced branch collars and port junctions to withstand internal pressure and mechanical loads
- Controlled curing cycles to achieve required mechanical strength and chemical resistance
Dimensional & Visual Inspection
- Verification of header diameter, length, wall thickness, and straightness
- Inspection of branch port alignment, spacing, and orientation
- Visual checks for surface finish, laminate uniformity, voids, cracks, and delamination
Integrity & Performance Testing
- Hydrostatic pressure testing of FRP/GRP headers and manifolds as per applicable standards
- Leak testing of multi-port assemblies and flanged connections
- Barcol hardness testing to confirm proper curing of laminate
- Bond integrity checks for laminated, stub-in, and flanged joints
Application-Specific Validation
- Confirmation of smooth internal surfaces to ensure low pressure drop and uniform flow distribution
- Inspection of anolyte and catholyte headers for resistance to highly corrosive electrochemical streams
- Verification of port geometry and flow symmetry for filtration, membrane, and electrochlorination systems
Documentation & Traceability
- Batch-wise production and inspection records
- Inspection and test reports (ITRs)
- Raw material traceability and resin batch documentation
- Quality compliance certificates supplied with each dispatch
Through disciplined quality control practices and application-focused inspections, SREX Composites ensures that every FRP/GRP header, manifold, anolyte header, and catholyte header assembly delivers consistent flow performance, corrosion resistance, and long-term reliability in critical process systems.
Get More Details
Have a question about our FRP/GRP products? Need a custom solution or technical recommendation? Fill out the form below, and our engineering team will reach out with precise information tailored to your requirements.
We are here to serve you.
We’re here to support you with reliable FRP/GRP solutions engineered for industrial excellence. Whether you need technical guidance, custom manufacturing, quotations, or project collaboration — our team is ready to assist you.
+91 70431 70434
marketing@srexcomposites.com
Plot No. 27, Shri Hari Industrial Park, Sokhada, Rajkot, Gujarat, India – 360003