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How high temperature resistant is pvc plastic pipe for construction

2023-01-10 Page view : 24 views


PVC-U plastic pipes are amorphous thermoplastic resins made of vinyl chloride monomer by polymerisation reaction plus certain additives (such as stabilisers, lubricants, fillers, etc.). pvc-U plastic pipes are modified by blending with other resins in addition to the additives, making them of obvious practical value. These resins are CPVC, PE, ABS, EVA, MBS, etc. UPVC has a high melt viscosity and poor fluidity, and even if the injection pressure and melt temperature are increased, the change in fluidity is not significant. In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, and the temperature range that can be molded is very narrow, which is a difficult material to mold.
Characteristics:
PVC-U plastic pipe has excellent bending properties, good chemical resistance, mechanical strength, ageing resistance and temperature resistance.
Load-bearing capacity:
PVC-U plastic pipes can withstand the heavy pressure of a footstep without fracture.
PVC-U plastic pipe application areas:
Electrical wire sleeving, decorative sleeving, suitable for the transport of liquids and oils, power line protection, protection of automotive wiring harnesses, machine tools machinery, automation instruments, etc.
PVC-U plastic pipe is light, easy to handle and load PVC-U plastic pipe is light, the specific gravity is only 1/5 of iron pipe, easy to handle, load and load, construction, can save construction costs. PVC-U plastic pipe has excellent corrosion resistance, excellent chemical resistance PVC-U plastic pipe has excellent acid resistance, alkali resistance, corrosion resistance, for the chemical industry, waste water drainage, sanitary sewerage and other uses is very suitable. PVC-U plastic pipe has smooth walls and low resistance to fluids, its roughness coefficient is only 0.009, which is lower than other pipes, and in the same calibre, the flow rate is higher and no scale is attached. PVC-U plastic pipe has good mechanical strength PVC pipe has good resistance to water pressure and impact strength, at room temperature, PVC-U plastic pipe is suitable for piping projects under various conditions.
Electrical insulation good PVC-U plastic pipe has superior electrical insulation, suitable for wire, cable conduit, can be widely used in telecommunications, power piping and building wire piping. PVC pipe does not affect water quality, as confirmed by the results of dissolution tests, does not affect the water quality, there is no “red water”, the current common pipe for water distribution. Good water solubility PVC-U plastic pipe regardless of the use of live socket or TS socket combination, have good water tightness, although many years with water pressure to water distribution, but also not to the risk of leakage. Construction of simple PVC-U plastic pipe construction quickly and easily, the construction project cost is low.
PVC-U plastic pipe
PVC-U pipe as a drainage material, due to its own characteristics, the use of indoor continuous drainage temperature shall not be greater than 40 ℃, while the instantaneous drainage temperature should not be greater than 80 ℃. This is often overlooked and can lead to leaks at the joints during long-term use, especially in some biochemical laboratories in university laboratory buildings where such problems often occur. And the solution can only be to replace other metal drainage pipe materials. At the same time a PVC pipe should be installed to avoid the arrangement of heat sources in the annex, which should be particularly noted in the installation of kitchen drains, to ensure that the distance between the drain and the stove, if not avoid should take insulation measures.


PVC-U drainage pipe when used in high-rise buildings. Some engineers and technicians do not take measures to prevent fire penetration as stipulated in the technical regulations. The correct approach is: according to the technical regulations, the riser is laid openly and its pipe diameter is greater than or equal to 110mm~l,-J, at the riser crossing the floor. Should take measures to prevent fire penetration; pipe diameter greater than or equal to 110mill of the open drainage cross-branch pipe into the pipe well, pipe riser, in crossing the pipe well, pipe hole wall, should take measures to prevent fire penetration. Transverse mains should not cross fire partition walls and firewalls; when it is unavoidable to do so, measures to prevent fire penetration should be taken on both sides of the wall where the pipe crosses, such as waterproof casing, fire stopping ring, etc.

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