What is the reason for using UPVC as a material for building drainage pipes?

UPVC pipe is a kind of plastic pipe that uses polyvinyl chloride (PVC) resin as raw material and does not contain plasticizers. With the development of chemical industry technology, it can now produce non-toxic pipes, so it has the performance of general polyvinyl chloride, and has added some excellent properties, specifically it has the advantages of corrosion resistance and good flexibility, so it is especially suitable for water supply pipe network. Because it does not conduct electricity, it is not easy to electrochemically react with acids, alkalis and salts, and acids, alkalis and salts are difficult to corrode it, so there is no need for external anti-corrosion coatings and inner linings.

The good softness overcomes the shortcomings of the brittleness of plastic pipes in the past, and can yield without cracking under the load. In addition, the UPVC pipe also has a light weight. The advantage of easy transportation.

The specific gravity of UPVC pipe is about (the proportion of cast iron pipe is about that), which is one-fifth of the weight of cast iron pipe, and the use of UPVC pipe can save transportation costs 1 10-1 5 compared with cast iron pipe. Its handling, loading and unloading construction are very convenient.

Rigid polyvinyl chloride (UPVC) drainage pipe is a scientific and technological achievement during the "Eighth Five-Year Plan" period in China, and the Ministry of Construction of the People's Republic of China in 1996 was a key promotion project of scientific and technological achievements. Because it has the advantages of light weight, corrosion resistance, smooth surface, good water performance, not easy to block, energy saving, high construction efficiency, etc., it has gradually replaced the traditional cast iron drainage pipe in construction engineering, and has achieved good economic and social benefits. It is not suitable for hot water transportation, and the joint bonding technology requirements are high, and the curing time is long.

UPVC plastic pipe has excellent insulation ability and is also widely used as a conduit for post and telecommunication cables. It does not scale, can inhibit the growth of bacteria, and is conducive to protecting the water quality from secondary pollution of the pipeline. Therefore, UPVC pipe has a wide range of application prospects, especially a large number of buried pipes in front of the user's water meter.

X0D X0A building cold and hot water system mainly uses PP, PB, CPVC, PEX and other types of pipes, which can be used for cold water pipes and hot water pipes.

Answer] :d UPVC drainage pipe has excellent physical and chemical properties, chemical corrosion resistance, high impact strength, low fluid resistance, and 30% higher flow rate than cast iron pipes of the same diameter. Aging resistance, long service life, service life is not less than 50 years; It is light and durable, easy to install, and can greatly reduce the construction cost compared to cast iron pipes of the same specification. Plastic pipes have low melting point and poor heat resistance, and high-rise buildings should be equipped with fire arrest rings or fireproof sleeves according to the design requirements for drainage plastic pipes.

The fire retardant ring is made of metal cavity material shell, filled with flame retardant expansion core material, sleeved on the outer wall of the hard PVC pipeline, fixed on the floor or wall part, when the fire occurs, the core material is heated and expands rapidly, squeezes the UPVC pipe, and blocks the pipeline through the hole in a short time to prevent the fire from spreading along the hole.

Answers]: a, c, d

Plastic drainage pipe (UPVC) is chemically resistant, high anti-erosion strength, small fluid resistance, anti-aging, long service life, light and durable, easy to install, and can greatly reduce the construction cost for cast iron pipes of the same specification.

PVC is polyvinyl chloride and UPVC (PVC-U) is unplasticized polyvinyl chloride (or hard polyvinyl chloride).

UPVC is mainly used for general purpose and drinking water transportation in buildings (overhead or buried) where the temperature is below 45 degrees.

Thermoplastic pressure pipes are used at room temperature, which mainly include PE water supply pipes, PE gas pipes, PVC-U water supply pipes, ABS water supply pipes and other types of pipes.

The cold and hot water system of the building mainly uses several types of pipes such as PP, PB, CPVC, PEX, etc., which can be used for cold water pipes and hot water pipes.

It's the same, there's no difference, it's all hard PVC water supply pipes.

U is a hard, unplasticized, such as water supply pipes for tap water, etc., and PVC pipes refer to pipes made of PVC resin as raw materials, which may be bendable, such as infusion pipes!

The full name of UPVC is rigid PVC The full name of PVC is PVC, and PVC pipe refers to the pipe made of PVC resin, but because the PVC raw material is very soft, a certain amount of calcium carbonate and other additives must be added to ensure that the hardness of the pipe can meet the standard. UPVC PVC is actually the same raw material, but the name is different. In foreign countries, PVC and UPVC are the same thing, and UPVC is also to distinguish another material, CPVC.

The use of pipelines in China is the difference between "water supply" and "drainage", and the drainage pipes are not pressure-bearing, so the general civil drainage pipes are very thin and brittle, and the drainage and water supply requirements of the chemical industry are as high, so the general chemical enterprises purchase water supply pipes.

As the name suggests, the water supply pipe is to transfer the liquid to the designated equipment, and the liquid transported will give the pipeline a pressure, so that the water supply pipe is required to have a certain pressure resistance, corrosion resistance, etc.

The commonly referred to UPVC water supply pipe and PVC water supply pipe are actually UPVC water supply pipes, that is, there is no difference. The reason why there are two names is that it is called by laymen.

In fact, it is the same thing, and if you want to distinguish it, you need to decide where you use it.

UPVC pressure water supply pipe is actually UPVC water supply pipe, generally there are more blue and white.

UPVC, also known as hard PVC, is composed of an amorphous thermoplastic resin made of vinyl chloride monomer through polymerization reaction with certain additives (such as stabilizers, lubricants, fillers, etc.). In addition to additives, the method of blending and modification with other resins is also adopted, which makes it have obvious practical value.

These resins are CPVC, PE, ABS, EVA, MBS, etc. The melt viscosity of UPVC is high and the fluidity is poor, and even if the injection pressure and melt temperature are increased, the fluidity does not change much. In addition, the molding temperature of resin is close to the thermal decomposition temperature, and the temperature range that can be molded is narrow, making it a difficult material to mold.

There are several common levels of stress that can withstand stress.