Pipe material

1 galvanized iron pipe. Due to the corrosion of galvanized iron pipes, the heavy metal content in the water is too high, which affects human health. Many developed countries * * and regional * * The department has begun to ban the use of galvanized iron pipes. At present, our country is gradually phasing out this type of pipeline. 2 copper pipes. Copper pipe is a relatively traditional but expensive pipe material, which is durable and easy to construct. Among many imported sanitary products, copper pipes are the first choice. Price is the main factor affecting its usage, and copper corrosion is also a factor. 3 stainless steel tubes. Stainless steel pipe is a relatively durable pipe material. However, its price is relatively high and the construction technology requirements are relatively high. In particular, its material strength is relatively hard and on-site processing is very difficult, so it is used less in decoration projects. 4 Aluminum-plastic composite pipe. Aluminum-plastic composite pipe is one of the more popular pipes on the market. Because of its light weight, durability and easy construction, its bendability is more suitable for use in home decoration. Its main disadvantage is that when used as a hot water pipe, long-term thermal expansion and contraction will cause pipe wall dislocation and leakage. 5 stainless steel composite pipe. Stainless steel composite pipes and aluminum-plastic composite pipes are similar in structure, and to a certain extent, their performance is also relatively close. Likewise, construction is still difficult due to the strength of steel. 6) PVC pipe. PVC (polyvinyl chloride) plastic pipe is a modern synthetic material pipe. However, in recent years, the scientific and technological community has discovered that the chemical additive phthalein, which can make PVC softer, has harmful effects on the kidneys, liver, and liver in the human body. * * The impact is huge, causing cancer, kidney damage, damaging the body's remodeling system, and affecting development. Generally speaking, because its strength is far from meeting the pressure-bearing requirements of water pipes, it is rarely used in tap water pipes. In most cases, PVC pipes are suitable for electrical wire conduits and sewage pipes. 7 PP pipe. There are many types of PP pipes, namely: (1) PP-B (block copolymerized polypropylene). Due to the use of fusion technology in construction. Therefore, it is also commonly known as hot melt tube. It is non-toxic, lightweight, pressure-resistant and corrosion-resistant, and is becoming a popular material ； Generally speaking, this material is suitable not only for cold water pipes, but also for hot water pipes and even pure drinking water pipes. (2) PP-C (modified copolymer polypropylene) pipe. Performance is basically the same as above. (3) PP-R (random copolymerized polypropylene) pipe. Performance is basically the same as above. PP-C, PP-B and PP-R have basically similar physical properties and basically the same application range, and can be used interchangeably in engineering. The main difference is: PP-C and PP-B materials have better low-temperature brittleness resistance than PP-R ； PP-R material has better high temperature resistance than PP-C and PP-B. In practical applications, when the liquid medium temperature is ≤5°C, PP-C and PP-B pipes are preferred. ； When the liquid medium temperature is ≥65°C, PP-R pipes are preferred. ； When the liquid medium temperature is between 5 and 65°C, the performance of PP-C, PP-B and PP-R is basically the same. This post was last edited by xhliu0410 on 2009-3-17 18:54 ]

1. Rigid polyvinyl chloride pipe (UPVC) Rigid polyvinyl chloride pipe (UPVC) is the most consumed variety among various plastic pipes in the world. It is also a new chemical building material currently being vigorously developed at home and abroad. The use of this kind of pipe can play a positive role in alleviating the situation of steel shortage and energy shortage in our country, and has significant economic benefits. 　　2. Core foam pipe (PSP) Core foam pipe is produced using a three-layer co-extrusion process. The inner and outer layers are the same as ordinary UPVC, and the middle is a new type of pipe with a low foaming layer with a relative density of 0.7-0.9. Because the structure utilizes the Type I structural principle in material mechanics and has a foam core layer with energy-absorbing and sound-insulating effects, it has gradually become a plastic pipe that replaces cast iron pipes, rigid PVC solid-wall pipes, etc. 　　3. Rigid polyvinyl chloride silencer pipe The inner wall of the UPVC silencer pipe has six triangular convex spiral lines, which allows the water to flow freely and continuously in a spiral shape along the inner wall of the pipe, and rotates the drainage to form optimal drainage conditions, thus playing a good energy dissipation effect at the bottom of the riser and reducing noise. 　4. Plastic corrugated pipes Plastic corrugated pipes adopt a special "annular groove" special-shaped cross-section in structural design. This pipe has a novel design and reasonable structure, breaking through the traditional "plate" structure of ordinary pipes, making the pipes have sufficient compressive and impact resistance, and good flexibility. According to different forming methods, it can be divided into single-split corrugated pipe and double-walled corrugated pipe. 　　5. Chlorinated polyvinyl chloride pipe (CPVC) Chlorinated polyvinyl chloride pipe is a plastic pipe with good heat resistance obtained by processing so-called perchlorvinyl resin with a chlorine content of up to 66%. Chlorinated polyvinyl chloride resin is made by chlorinating PVC resin. As the chlorine content in the resin increases, its density increases, softening point, heat resistance and flame retardancy increase, tensile strength increases, melt viscosity increases, excellent chemical corrosion resistance, and it does not deform in boiling water. 　　6. High-density polyethylene pipe (HDPE) High-density polyethylene pipe is valued by the pipeline industry for its excellent chemical properties, toughness, wear resistance, and low price and installation fee. It is the second most used plastic pipe material after polyvinyl chloride. 　　7. Cross-linked polyethylene (PEX) Cross-linked polyethylene pipes are regarded as a new generation of green pipes due to their good hygiene and comprehensive mechanical and physical properties. The main raw material for producing cross-linked polyethylene pipes (PEX) is HDPE, as well as initiators, cross-linking agents, catalysts and other additives. It is manufactured using the world's advanced one-step process (MONSOIL method) technology. It uses ordinary polyethylene raw materials and adds silane grafting materials to form chemical covalent bonds between the polymer macromolecular chains to replace the original van der Waals forces, thereby forming a three-dimensional chain network structure of cross-linked polyethylene. Its cross-linking degree can reach 60%-89%, giving it excellent physical and chemical properties. 　　8. Steel-plastic composite pipe In order to avoid the corrosion of galvanized steel pipes on water quality (especially hot water and electrochemical corrosion), steel-plastic composite pipes were developed. The composite pipe of metal and plastic is a macro composite system of metal/polymer. The metal matrix bears the internal and external pressure of the pipe through interface bonding, and the plastic matrix plays a role in anti-corrosion. 　　9. Aluminum composite pipe (PAP) Aluminum-plastic composite pipe (PAP) is a new type of pipe that combines the advantages of metal and plastic. The aluminum-plastic composite pipe is composed of five layers. The outer and inner walls are chemically cross-linked polyethylene, and the middle is a layer of about 0.3mm thin aluminum plate welded pipe. ； There is a layer of adhesive between the aluminum tube and the inner and outer layers of polyethylene, which are firmly bonded. 　10. Random copolymerized polypropylene pipe (PP-R) Polypropylene can be divided into homopolymerized polypropylene and copolymerized polypropylene. Copolymerized polypropylene is further divided into block copolymerized polypropylene (PPC) and random copolymerized polypropylene (PP-R). Random copolymerized polypropylene, also known as three-type polypropylene, is a copolymer with propylene and other comonomer segments randomly distributed on the main chain. 　　11. Polybutylene pipe (PB) PB resin is a high molecular polymer obtained by synthesizing 1-butene. It is an isotactic polymer with a slightly lower isotacticity than polypropylene. It has the impact toughness of polyethylene, higher stress crack resistance and excellent creep resistance than polypropylene, and has slightly rubbery properties, and can withstand 90% of the gas yield strength for a long time. 　　12. ABS pipe ABS pipe is a new type of corrosion-resistant pipe. It has good impact strength and surface hardness within a certain temperature range. It has good overall performance, is easy to form and machine, and can also be chrome plated on the surface. Because it combines the corrosion resistance of PVC pipes with the mechanical properties of metal pipes, it is not only used in pure water systems but also suitable for transporting corrosive liquids in electroplating, chemical, petroleum, environmental protection and other industries. Plastic pipe types and application range No. Purpose and characteristics Pipe types Municipal water supply Municipal drainage Building cold water supply Building hot water supply Building drainage threading pipe Floor radiant heating pipe Maximum diameter (mm) Main connection method Stiffness 1UPVC hard polyethylene pipe Use Use Use Use Use less than 1000 Solvent bonding/RR Straight pipe with rubber ring 2 Use 50-160 for PSP core layer foam composite pipe (TS socket) Solvent bonded straight pipe 3 Use 75, 110 for hard polyvinyl chloride silencer pipe Extruded rubber ring sealing interface straight pipe 4 Use 300 for plastic corrugated pipe Sleeve bonding straight pipe 5 CPVC Chlorinated polyvinyl chloride pipe Use 20 0 or less (TS socket) solvent-bonded straight pipe 6 HDPE high-density polyethylene pipe for use 315 (electric) hot-melt coil/straight pipe 7 PEX cross-linked polyethylene pipe for use 63 copper extrusion clamping coil/straight pipe 8 plastic-lined or plastic-coated steel pipe for use 150 threaded connection straight pipe 9PAP aluminum plastic composite For combined pipes, use 63 copper extrusion clamping coils/straight pipes 10PPR random copolymer polypropylene pipes use 110 (electric) hot melt splicing coils/straight pipes 11PB polybutylene pipes use 32 extrusion clamping/(electric) hot melt coils/straight pipes 12ABS solid wall pipes use 200 (TS socket) solvent bonded straight pipes

What material is used for bleach pipes?