Corrosion resistance of fiberglass

Corrosion resistance of fiberglass
Reinforced plastics with fibers or their products as reinforcing materials. Referred to as fiberglass reinforced plastic or fiberglass reinforced plastic. Due to the different types of resins used, they are referred to as polyester fiberglass, epoxy fiberglass, and phenolic fiberglass. Glass is hard and fragile, with good transparency, high temperature resistance, corrosion resistance, and other properties; At the same time, steel is very hard and not fragile, and also has the characteristics of high temperature resistance. So people began to think that if we could produce a material that not only has the hardness, high temperature resistance, and corrosion resistance of glass, but also has the characteristics of being as hard and unbreakable as steel, then this material would definitely have great use. After research and experimentation, people have finally developed such a composite material. It is a fiberglass tube that can stand on par with steel.
Fiberglass reinforced plastic sand pipes have become the choice for water transportation projects due to their excellent corrosion resistance, lightweight and high-strength, large conveying flow, and convenient installation. It has unparalleled advantages over other metal pipes, mainly possessing the following characteristics: excellent corrosion resistance; Small specific gravity and light weight; Long length of a single pipeline; Excellent hydraulic performance; Low coefficient of thermal expansion; Long service life.
Before installation, fiberglass sand pipes should be rechecked for equipment nozzles, embedded parts, reserved holes, steel structures, and other contents related to pipeline installation. The slope of the pipeline should be adjusted according to the requirements of the drawing. The adjustment method can use the support to meet the slope requirements, and the weld seam should be set in a place that is convenient for maintenance and observation. Thirdly, before connecting the pipeline to the machine, it is necessary to prevent opposition and check the parallelism and coaxiality of the flange in a free state. Fourthly, the safety valve should be installed vertically and adjusted in a timely manner during trial operation. Fifth, before installing the valve, check its model according to the design documents and determine its installation direction according to the flow direction of the medium. When the valve is connected to the pipeline by flange or thread, the valve should be installed in the closed state; When installed by welding, the valve must not be closed. Sixth, temporary replacement of instrument components: All instrument components shall be replaced with temporary components during installation, and formal installation shall be carried out after the completion of pressure testing, flushing, and blowing work, and before feeding. In addition, there are certain safety measures for fiberglass sand pipes before and after installation. Below is a brief introduction.
Before construction, it is necessary to investigate the location of adjacent buildings, structures, water supply, drainage, gas, electricity, telecommunications, and underground pipelines, mark them accordingly, and take reliable safety protection measures.
2. The pipe trench should be excavated according to the design requirements, and attention should be paid to observing whether there are signs of collapse. If necessary, protective measures should be set up on the pipe trench wall, and an accident emergency plan should be prepared.
3. When lifting pipelines, the lifting equipment should be checked for safety, and no one should stay below the lifting pipe fittings. The stopping position of the crane should prevent the soil foundation from softening due to immersion in water, and measures such as wooden blocks or other measures should be taken to prevent the body and support legs from sinking or tilting. Hoisting operations cannot be carried out on rainy days.
4. During the installation process, it is necessary to prevent fires caused by welding or cutting sparks.
During the water pressure test, the ends need to be supported and no one is allowed to stand at both ends of the pipeline; During the water pressure test, it is strictly prohibited to strike or repair defects on the pipe body and interface. When defects are encountered, they should be marked and repaired after pressure relief.