How to solve the leakage caused by the problem of FRP pipeline

Centrifugal casting sand pipe is selected. Because the pipe wall of centrifugal casting sand pipe is usually a multi-layer structure, it can be planned according to the needs of different effects such as enhanced anti-seepage, transition, barrier, central layer with added rigidity and inner lining layer, and the thickness of the inner lining layer can be determined according to the demand, and the pipe wall is limited under the effect of large centrifugal force, which is very fine, solid, non-delaminate and non-porous. Its pipe wall is an I-beam structure, with strong bending resistance and high stiffness.

At present, most of the production on the market is fiber surrounding sand pipe, there are many shortcomings in product quality, and the market share of centrifugal casting sand pipe should be gradually improved, and the quality of the project will also be improved.

As far as possible, use underground laying to prevent laying FRP pipes under open conditions, or take appropriate measures to prevent FRP pipes from being directly exposed to ultraviolet rays.

The main forming process of FRP pipe is that the inner pipe and the outer pipe of the pipeline are all controlled by microcomputer, manufactured by glass fiber winding process, and the interlayer between the inner pipe and the outer pipe is made of polyurethane integral foaming. It is used in oilfield, chemical industry, water supply and drainage, electric power, food, post and telecommunications, papermaking, anti-corrosion and thermal insulation, sewage treatment engineering and other industries.

The pipes of FRP pipes are light and strong; Convenient transportation, installation and maintenance; Without heavy duty, the characteristics of hoisting equipment, the inner wall of the pipe has the characteristics of non-scaling, and it can still keep the inner wall smooth after long-term use. The insulation layer is manufactured while working, which can effectively shorten the installation time.

Add raw materials to the leaking area, or simply cut off the bad part and connect a good section of pipe.

This is an outsourced pipe device, similar to a pipe clamp, it uses a 304 stainless steel shell, built-in grid glue plate, through the grid layer by layer sealing to plug the leak, repair the need to wrap the leakage, and then tighten the bolt that is Hui Noise. The advantage is that it can quickly plug the leak under pressure (a DN200 pipeline can be repaired in about 10 minutes), and for the slightly deformed FRP pipe, it can also change with the arc, which is a flexible connection device, and the disadvantage is that the cost is higher than the glue rotten rent repair, but it is a good way to repair the pipeline that can not be stopped.

1.Tube replacement repair.

We can cut off the broken part of the pipe, replace it with a new section of pipe, and then connect it with a flange or pipe connector, which is more time-consuming and costly to repair.

2.Gluing. This is now a more commonly used repair method, the use of epoxy resin, curing agent, accelerator and other glass fiber cloth for repeated application repair, the advantage of this method is that the cost is lower, but the disadvantages are also obvious, we need to prepare our own glue, and need 2-7 days to dry, during which the pipeline can not be used normally.

3.Zhuhong FRP pipe repairer.

This is an outsourced pipe device, similar to a pipe clamp, designed and developed by Zhuhong Machinery, it uses a 304 stainless steel shell, built-in grid rubber plate, through the grid layer by layer sealing to plug the leakage, repair the need to wrap the leakage, and then tighten the bolts. The advantage is that it can quickly plug the leak under pressure (a DN200 pipeline can be repaired in about 10 minutes), and for the slightly deformed FRP pipe, it can also change with the arc, which is a flexible connection device, and the disadvantage is that the cost is higher than that of adhesive repair, but it is a good repair method for the pipeline that cannot be stopped.

Are you talking about 901 being up-latitude? When winding, the innermost layer is used in order of surface felt, chopped felt, and glass fiber yarn, right? Do you have sufficient curing and maintenance before use?

Standard bisphenol A epoxy vinyl resin should be able to withstand corrosion. The general composition of copper electrolyte is: Cu 50 60g L; H2SO4 180 210G L, electrolyte normal operating temperature:

60 65 , the electrolyte circulation speed is . In the past, the first bisphenol A type unsaturated polyester resin (197) was used, and its FRP life can also reach about 5 years, and now many of them have selected bisphenol A epoxy vinyl resin (such as 854 for Guixi smelter, including electrolytic cell), and the 901 you choose is also this kind of resin.

If the resin is not corrosion-resistant, you can see it by taking a closer look at the blackened and stripped parts of the pipe. If the resin has no signs of corrosion, it depends on whether the yarn has been polluted in the production process and whether it is not cured well after production.

Addendum: Based on your response to the question, confirm that the resin is not corroded, that the layup is reasonable, and that the cure is complete. This preliminary judgment is as follows:

The wettability of the resin and reinforcement material may be unsatisfactory during production, and it may be partially dried or not impregnated, causing pitting, and copper sulphate penetrating and expanding so that delamination may occur. If there is no sign of corrosion on the inner surface of the pipe after washing, the blackening should be copper sulfate crystals. (The above views are for reference only).

This must have been caused by the immaturity of the technology during the production, and it can be repaired now.

It must be cutting corners in production, and our company will not produce it.