From Design to Installation: How Fiberglass Manufacturing in Pakistan Works at FCI Composites
Author : FCI Composites | Published On : 07 Aug 2026
Fiberglass manufacturing is the end-to-end process of converting glass fibres and thermosetting resin into finished composite products through design, mould manufacturing, fabrication, and installation, producing corrosion-resistant industrial equipment with a design life of 20 to 30 years.
Buying a fiberglass product is not the same as buying a steel component off a shelf. A steel pipe comes in standard sizes. A steel tank has standard dimensions. You order, it arrives, you install it.
Fiberglass manufacturing does not work that way, and that is the point. The reason FRP composite products outperform steel in Pakistan's chemical plants, fertilizer complexes, and textile mills is that each product is engineered for the specific fluid, temperature, pressure, and site condition it will handle. A tank built for caustic soda at 60 degrees is a different product from one built for hydrochloric acid at ambient temperature. Same shape. Different resin. Different performance over 25 years.
Fiber Craft Industries Pakistan has been running this full-cycle manufacturing process since 1985. This article walks through how it works, from the first design conversation to installation and commissioning on site.
Step 1: Design, Where Fiberglass Manufacturing Begins
Every FRP composite product starts with a design phase. For standard products like storage tanks, pipes, and package cooling towers, the design inputs are the operating data: fluid type, concentration, temperature, pressure, flow rate, and site conditions. For custom or first-of-kind products, the design phase involves 3D modelling, CAD conversion, and material selection before any fabrication begins.
FCI's engineering team combines over three decades of manufacturing knowledge with modern design software to translate project requirements into fabrication-ready specifications. The process covers:
- Material selection based on chemical compatibility, temperature, and mechanical load
- Wall thickness calculation for the required pressure rating or structural load
- Nozzle placement, orientation, and reinforcement design
- Foundation and support structure requirements
- Dimensional layout for transport and on-site assembly
The design phase is where most long-term performance problems are either avoided or created. A tank with the wrong resin for its chemical service will degrade from the inside regardless of how well it was fabricated. Getting the resin selection right at this stage is what determines whether the product lasts 5 years or 25.
Step 2: Mould Manufacturing, Pakistan's Only CNC 5-Axis Operation in the Private Sector
After the design is confirmed, the mould or pattern is manufactured. This step is what separates FCI from fabricators who rely on imported moulds or fixed standard shapes.
FCI operates CNC 5-axis and 3-axis machines with a bed size of 36 x 12 ft, the only private engineering facility in Pakistan running this equipment for composite mould and pattern manufacturing. The machines translate 3D CAD models into precision moulds for complex composite and metal parts across industrial, architectural, and aeronautical applications.
The capability covers:
- Reverse engineering from existing components or samples
- Rapid prototyping for new product development
- First article manufacturing without external tooling dependency
- 3D modelling and CAD conversion for engineering and aerospace applications
For standard products like tanks and pipes, moulds are already available in a range of sizes. For custom components, specialty scrubbers, non-standard vessel geometries, aerospace parts, the mould is manufactured in-house before fabrication begins. This in-house tooling capability is what allows FCI to take on non-standard projects that other Pakistani fabricators cannot quote on.
Step 3: Fabrication, Four Manufacturing Processes Under One Roof
FCI runs four main fiberglass manufacturing processes from its 50,000 sq. ft. facility in Lahore. Each process suits a different product category and delivers different mechanical properties.
Filament winding is used for storage tanks and pipes. Continuous glass fibre rovings are wound under controlled tension over a rotating mandrel, saturated with resin, and cured to form a consistent laminate with no voids. FCI operates a CNC McClean Anderson filament winding machine, the first of its kind introduced to Pakistan by FCI. Filament winding produces the most consistent laminate quality of any fiberglass manufacturing process for cylindrical products.
Pultrusion is used for structural profiles, gratings, and FRP cross arms. Glass fibres are pulled continuously through a resin bath and a heated die, producing structural sections with consistent cross-section and high glass content throughout. Pultruded sections have predictable mechanical properties and dimensional accuracy that matches steel structural profiles, making them a direct replacement in structural applications.
Hand lamination and contact moulding are used for boats, large structures, custom shapes, and products where a closed mould is not practical. Glass cloth or mat is laid up by hand with resin, allowing complex geometries and large one-off components.
RTM and vacuum infusion are used for precision composite components in aerospace, marine, and weight-critical applications. Resin is injected or drawn into a closed mould containing dry glass reinforcement, producing high-fibre-volume parts with controlled properties and smooth surfaces on both sides.
Oven curing up to 40 ft in length handles large fabricated structures that need controlled heat to complete the resin cure cycle and reach full mechanical properties.
Step 4: Quality Control and Testing
FCI holds ISO 9001:2015 certification. Quality control runs through every fabrication stage, not only at final inspection. For cooling tower components, all products are manufactured in compliance with Cooling Technology Institute guidelines. FCI also offers third-party testing for clients who require independent verification of component performance before acceptance.
For pressure vessels and tanks, wall thickness, laminate quality, and resin content are verified during fabrication. Hydrostatic pressure testing confirms the finished vessel meets the specified pressure rating before it leaves the facility.
FCI's PAEC project, fiberglass ion exchange columns of 2-meter diameter and 5-meter height for acidic service, tested to 8 bar pressure, illustrates the testing standard applied to critical applications. These were not standard products. They were engineered, fabricated, and pressure-tested to a specific client specification.
Step 5: Field Survey and Installation
Fiberglass manufacturing does not end at the factory gate. Installation quality determines whether the design performance is achieved in service. A correctly fabricated tank with incorrectly installed nozzle connections will leak. A cooling tower with incorrect fan pitch will underperform its thermal rating from day one.
FCI's field survey service covers site assessment before fabrication begins. Accurate site dimensions, foundation conditions, access constraints, and utility connection points are confirmed before the product is built. This eliminates the fit-up problems that occur when a fabricated product arrives on site and does not match the actual installation conditions.
Installation and commissioning services cover:
- Mechanical installation of tanks, pipes, cooling towers, and structural components
- Alignment and levelling of vessels and equipment
- Nozzle and piping connection
- Cooling tower fan commissioning and thermal performance verification
- Handover documentation and operating instructions
For large field-erected cooling towers, FCI's installation team builds the complete system on site. The Engro Fertilizers project, where FCI replaced a failing concrete cooling tower with a full FRP pultruded structure and installed and commissioned all 5 cells during a 60-day plant shutdown, demonstrates the scale and complexity of installation work FCI executes.
What FCI Manufactures Through This Process
The full design-to-installation capability produces every major FRP composite product category:
- FRP and GRP storage tanks for water, chemical, acid, and process fluid storage
- Filament-wound fiberglass pipes for water transmission, chemical transfer, and industrial process lines
- Cooling towers from 50 refrigeration tons to 500,000 refrigeration tons in all configurations
- Molded and pultruded FRP gratings for drain covers, walkways, platforms, and solar inspection walkways
- Fume gas scrubbers for acid gas and chemical vapor treatment
- FRP structural profiles, staircases, platforms, and crossovers
- FRP sheets for cladding, lining, and surface applications
- FRP cross arms for power distribution and transmission lines
- Fiberglass boats, porta cabins, and specialty composite components
The in-house mould manufacturing capability means FCI is not limited to products that fit standard tooling. If the application requires a non-standard vessel, a complex structural component, or a first-of-kind composite product, the design and tooling can be developed in-house.
FAQ: Fiberglass Manufacturing in Pakistan
What is the fiberglass manufacturing process?
Fiberglass manufacturing converts glass fibres and thermosetting resin into finished composite products through design, mould manufacturing, and fabrication. The main fabrication processes are filament winding for tanks and pipes, pultrusion for structural profiles, hand lamination for large or complex shapes, and RTM or vacuum infusion for precision components. Each process produces different mechanical properties suited to different product applications.
What services does FCI Composites offer beyond manufacturing?
FCI offers design and engineering, CNC mould and pattern manufacturing, structural analysis and simulation, field survey, installation, and commissioning. The company provides turn-key solutions from initial concept through to installed and commissioned products, covering both standard product categories and custom composite components for industrial, infrastructure, and aerospace applications.
Why does fiberglass manufacturing start with design rather than fabrication?
The resin system, wall thickness, laminate structure, and nozzle design must all match the specific service conditions before fabrication begins. A tank built without confirming chemical compatibility between the stored fluid and the resin system will fail in service regardless of fabrication quality. Design is where the 20 to 30-year performance of the finished product is determined, not at the fabrication stage.
What is filament winding and why is it used for FRP tanks?
Filament winding is a process where continuous glass fibre rovings are wound under controlled tension over a rotating mandrel, saturated with resin, and cured to form the tank or pipe wall. The controlled winding angle and tension produce a consistent laminate with no voids and predictable pressure ratings. FCI operates a CNC McClean Anderson filament winding machine, the first introduced to Pakistan, producing tanks and pipes to consistent dimensional and mechanical standards.
Can FCI manufacture custom or non-standard fiberglass products?
Yes. FCI's in-house CNC 5-axis and 3-axis mould manufacturing capability, the only such facility in Pakistan's private sector, allows the company to develop tooling for non-standard geometries, reverse-engineered components, and first-of-kind composite products. Custom tanks, specialty scrubbers, aerospace components, and complex structural parts have all been manufactured through this process.
What to Do Next
Fiberglass manufacturing in Pakistan is not a commodity process. The right product starts with the right design, uses the right resin for the chemical service, and is installed by a team that knows what correct looks like in the field.
Fiber Craft Industries Pakistan runs the complete process in-house, from the first design conversation through CNC mould manufacturing, filament winding or pultrusion fabrication, quality testing, site survey, and installation.
Submit your project data and request a technical proposal directly from Cooling Towers FCI engineering team at fcicomposites.com.
