FRP pipe and fitings

FRP fume pipe

FRP fume pipe

Introduction:

FRP chimneys, short for Fiber Reinforced Plastic Chimneys, commonly known as fiberglass chimneys or FRP exhaust stacks, are a new type of composite material chimney made by integrally molding high-performance synthetic resin as the matrix and alkali-free glass fiber and its products (such as woven fabric, felt, etc.) as the reinforcing material through a computer-controlled winding process.

As an ideal replacement for traditional brick chimneys, carbon steel chimneys, and stainless steel chimneys, FRP exhaust stacks fully utilize the high design flexibility of composite materials and are specifically designed for corrosive industrial waste gas emissions from industries such as power, chemical, and metallurgy. Especially for flue gas after wet desulfurization (wet chimney environment), FRP material, with its excellent corrosion resistance and temperature resistance, solves the pain points of traditional metal materials such as easy corrosion and short lifespan.

Core Features:

  1. Excellent Corrosion Resistance

This is the biggest product advantage of FRP chimneys. Fiberglass reinforced plastic (FRP) is inherently resistant to acid and alkali corrosion, capable of withstanding extreme environments with pH values ​​ranging from 1 to 14 for extended periods, effectively resisting highly corrosive media such as SO₂, SO₃, HCl, and HF in flue gas. For high-temperature, high-humidity, corrosive flue gas after desulfurization treatment, FRP is currently recognized as an ideal lining or main body material.

  1. Lightweight and High-Strength, Easy Installation

FRP has a density approximately one-quarter that of steel, yet its tensile strength is comparable to ordinary carbon steel. This makes FRP chimneys lightweight, easy to transport, and simple to install. Especially in the renovation of old factories or high-rise buildings, it eliminates the need for large lifting equipment like traditional steel structures, significantly reducing installation costs.

  1. Smooth Inner Wall, Low Resistance, Less Scale Formation

The inner wall of an FRP chimney is extremely smooth with low surface roughness and low frictional resistance. This not only means faster flue gas emission and less static electricity generation, but also effectively prevents dust adhesion and scale formation on the wall surface, reducing the frequency of cleaning and maintenance.

  1. Long Service Life and Low Life Cycle Cost

Although the initial cost may be slightly higher than that of ordinary carbon steel, considering its maintenance-free service life of 15-20 years or even longer, the life cycle cost of FRP chimneys is far lower than that of metal chimneys that require regular anti-corrosion treatment. It solves the structural safety hazards caused by corrosion in traditional chimneys.

  1. High Design Flexibility

FRP chimneys can be structurally designed according to working conditions, enabling the manufacture of not only small-diameter pipes but also large chimneys with diameters of several meters. Depending on the working requirements, customized high-temperature resistant (standard type resistant to 120℃, high-temperature type up to 220℃), flame-retardant, and thermally insulated structures are available.

Main Application Areas：

Power Industry (Coal-fired Power Plants): Used in flue gas desulfurization (FGD) systems in thermal power plants, as the inner liner of desulfurization chimneys or directly as the flue of exhaust cooling towers. This is one of the most widespread applications of FRP chimneys.

Chemical and Fertilizer Industry: Used for discharging corrosive tail gases from the production processes of hydrochloric acid, sulfuric acid, and nitric acid, as well as ammonia- and acid-containing waste gases from fertilizer production.

Environmental Protection and Municipal Engineering: Centralized emission of odorous and corrosive waste gases from waste incineration power plants and sewage treatment plants.