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Reasons and solutions of FRP pipe stratification
Writer:admin    Released:2018-06-30 09:14:27    Type:【L】【M】【S
Reasons for the stratification of glass steel pipe caused by the stratification of glass steel pipe with sand inclusion:
Reason: the rubber cloth is too old :Acetanilide gelatine is too small or inhomogeneous.The temperature of the heating roller is too low, the resin is not melting well, and the adhesive cloth cannot adhere to the core well.Low tension gluing fabric;Bleach oily demodulator too much, stained core cloth.
Solution: the amount of adhesive and the amount of soluble resin should meet the quality requirements. The temperature of the hot roller is adjusted so that when the rubber cloth passes through the hot roller, the rubber cloth has become soft and sticky, and the tube core can be firmly adhered.Press to adjust the tension of adhesive cloth;To reduce or eliminate the use of oily desorption agent.
The vitreous tube has bubbled inside
The main reason is that the lead cloth is not attached to the core.
Solutions:Be careful when operating, make sure that the lead cloth is attached to the core of the tube.
Glass steel pipe after curing foaming or corrugate pipe after curing foaming adhesive is the major cause of the volatiles content is too big, and lower rolling temperature, rolling speed, tape volatiles to volatilize, so that the residue in the tube. When the pipe is heated and solidified, the residual volatiles become hot and bubbling.
Solution: control the content of volatile matter, increase the temperature and slow down.
The reason why the pipe creases after solidification is that the adhesive content of the adhesive cloth is high.Solution: appropriately reduce the amount of adhesive, reduce the temperature of winding.
The glass steel tube is not qualified for voltage resistance
Causes: during the rolling process, the tension of the adhesive cloth is insufficient, and thewinding speed;Potassium adjusts the curing process to ensure complete solidification of the tube.
Questions to be noted
1. As the density is small and the material is light, it is necessary to consider the anti-floating measures such as setting up town piers or drainage of rainwater runoff and other anti-floating measures.
2, in has been shipped on glass steel pipe tee, repair pipe crack, etc, the construction requirement completely dry conditions similar to the plant and construction of resin and fiber cloth still need 7-8 hours of curing, and site construction and repair of generally difficult to meet this requirement.
3, existing underground pipeline detection equipment mainly detect metal pipeline, and nonmetal pipeline detection instrument is expensive, so the glass steel pipe buried at present can't detect, after other subsequent construction units in construction easy to dig injury, damage to the pipe.
4. Poor uv protection capability of glass steel tube.At present, open glass steel pipe can delay the aging time by making 0.5mm thick rich resin layer and ultraviolet absorbent (processed in the factory) on its surface.As the running time goes on, the rich resin layer and ultraviolet absorbent will be damaged, which will affect their service life.
5. The overburden depth is high.In general, the shallowest overburden of SN5000 class glass steel pipe under the roadway is not less than 0.8m.The deepest overburden is not greater than 3.0m;The shallowest overburden of SN2500 glass steel tube is not less than 0.8m;The deepest overburden is no more than 1.2m (the minimum and deepest overburden of 12mm thick steel coils are 0.7m and 4.0m respectively).
6. The backfill soil shall not contain more than 50mm bricks, stones and other hard objects to avoid damaging the outer wall of the pipeline.
7. At present, there have been no reports of large-scale use of glass steel pipe by large water companies in China. As glass steel pipe is a new type of pipe material, the service life is unknown.

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