FRP Equipment for the Chemical Industry

Chemical plants need equipment that remains compatible with the materials handled throughout production, storage, cleaning, and waste treatment. A tank storing a single chemical operates under different conditions from a transfer line carrying mixed liquids or a scrubber exposed to hot, humid exhaust.

Weitong FRP supplies fiberglass tanks, pipes, fittings, and treatment equipment for chemical applications. Material selection is based on the complete service conditions, including chemical composition, concentration, temperature, and mechanical loads.

- Storage equipment: These can be used to store various corrosive media, including acids, alkalis, saline solutions, and organic solvents. Examples include FRP storage tanks and tanks.

- Transportation equipment: FRP pipes and fittings (such as elbows and flanges) are essential for transporting corrosive fluids in the chemical industry. Their smooth inner walls minimize fluid resistance, reducing energy consumption. They are also wear- and corrosion-resistant, offering a long service life and are suitable for transporting chemical raw materials, wastewater, and other waste liquids.

- Tower equipment: FRP absorption towers, scrubbers, and cooling towers play a vital role in gas purification, absorption, and cooling processes in chemical production. For example, absorption towers can be used to treat corrosive gases such as sulfur and chlorine. Their corrosion-resistant tower structure ensures a stable purification process. - Reaction Equipment: Some small reactors and mixing tanks are also made of FRP. These materials are suitable for chemical reactions where corrosion is not a concern but equipment weight and cost are a concern. They meet the corrosion resistance and structural strength requirements of the reaction process.

- Environmental Protection Equipment: FRP products such as gratings, covers, and fan casings are also widely used in chemical wastewater and exhaust gas treatment systems. Their corrosion resistance allows them to withstand the harsh media found in treatment environments, while also being easy to install and maintain, contributing to the efficient operation of environmental protection processes.

Chemical Storage and Feed Systems

FRP tanks can be specified for selected acids, alkalis, salt solutions, and other compatible chemicals. The appropriate resin and corrosion barrier depend on the exact substance and operating conditions; suitability for one chemical does not establish suitability for another.

Tank design also needs to reflect how the vessel will be filled, emptied, vented, and maintained. Liquid density determines hydrostatic loading, while filling and withdrawal rates affect venting requirements. Nozzle positions should accommodate transfer piping, level instruments, overflow connections, and maintenance access.

For chemical feed systems, the storage tank, outlet connection, dosing equipment, and connecting pipework should be reviewed together. This helps identify incompatible seals, unsupported connections, and inaccessible maintenance points before installation.

Process Transfer and Distribution Piping

Chemical transfer lines connect unloading points, storage vessels, dosing stations, and process equipment. FRP piping can provide a corrosion-resistant flow path when its resin system, liner, and joints are suitable for the service.

Straight pipes and FRP pipe fittings should be specified as a coordinated system. Elbows accommodate routing changes, tees serve branch lines, reducers connect different diameters, and flanges provide interfaces with equipment and valves.

Particular attention is needed at pump discharge connections, frequently operated valves, and changes in direction. Pressure fluctuations, vibration, thermal movement, and concentrated equipment loads must be addressed through the piping layout and support design.

Where a line handles several products, compatibility should cover every conveyed chemical as well as flushing and cleaning solutions.

Corrosive Exhaust Collection and Scrubbing

Chemical production can generate fumes that require collection and treatment before discharge. FRP ducts, absorption towers, and scrubber bodies can be used in suitable corrosive exhaust services.

Equipment selection should consider both the gas stream and the scrubbing liquid. Relevant conditions include gas composition, moisture, inlet temperature, chemical concentration, and the possibility of condensation. The environment at the gas inlet may differ substantially from conditions elsewhere in the tower.

For scrubber systems, define:

• Gas flow rate and expected variations.

• Contaminants and required outlet concentrations.

• Scrubbing-liquid chemistry and operating temperature.

• Fan suction and equipment pressure conditions.

• Access requirements for packing, spray nozzles, and mist eliminators.

The FRP shell provides containment and structural support. Removal performance also depends on process design, gas–liquid contact, reagent control, and maintenance.

Chemical Wastewater Collection and Treatment

Wastewater composition can change between production batches, cleaning cycles, and treatment stages. FRP tanks and piping may be used for compatible collection, transfer, and treatment duties, provided selection considers the full range of expected conditions.

Average pH alone is not enough to establish material suitability. Residual solvents, oxidizing chemicals, suspended solids, and temperature peaks may affect the corrosion barrier or equipment design.

Neutralization requires particular attention because chemical addition can create localized heat and concentrated exposure near the dosing point. Mixing arrangements, chemical entry locations, and maximum temperatures should be defined before the vessel is specified.

Where solids are present, flow velocity, settling, abrasion, and cleaning access should also be reviewed.

Design for Inspection and Maintenance

Maintenance access should be considered before equipment dimensions and nozzle locations are finalized. Tanks need suitable inspection access, piping requires accessible joints, and scrubbers need space for internal component removal.

During operation, inspection should focus on changes such as surface blistering, cracking, exposed fibers, joint leakage, or deformation. Inspection intervals should reflect the chemical duty and operating history.

Changes to the process also require review. Increasing temperature, introducing a different cleaning agent, or changing chemical concentration can affect equipment that was suitable for its original service. Existing material specifications should be checked before making these changes.

Discuss Your Chemical Equipment Requirements

Send Weitong FRP your equipment drawings or process requirements, together with the chemical composition, concentration, operating temperature, pressure or vacuum, and required capacity or flow rate.

For replacement equipment, include the original specification and details of any leakage, corrosion, or operating changes. These records help establish the requirements for the proposed tanks, piping, fittings, or exhaust-treatment equipment.