Water supply and drainage works generally have tap water supply works, the second is the drainage project, the third is building water and drainage, etc., all kinds of pipe is the main application of the project material, today, pipe manufacturers Jieerkang building materials Xiaobian to introduce to you about the water supplies and drainage engineering commonly used pipe fittings.
- Rigid polyvinyl chloride (PVC-U) pipes
PVC-U drainage pipe is made of sanitary polyvinyl chloride (PVC) resin as the main raw material. Adding proper amount of stabilizer, lubricant, filler, colorant, etc., through plastic extruder extrusion molding and injection molding machine injection molding, cooling, solidification, stereotypes, inspection, packaging and other processes to complete the production of pipe, pipe fittings.
The advantages of PVC-U pipeline: light weight, corrosion resistance, small flow resistance, energy conservation, rapid installation, low cost.
Scope of application: urban tap water delivery and water supply project, inside and outside the building water supply projects, industrial and mining enterprises water supply works, buried fire water projects, irrigation and water conservancy projects, landscape gardening greening water supply plants, aquaculture water supply drainage projects.
2, random copolymerization polypropylene (PP-R) water supply pipe
PP-R pipe, also known as the three-type polypropylene pipe, the use of random copolymer of polypropylene by extrusion pipe, injection into pipe fittings. It is a new plastic pipe product developed and applied in Europe in the early 1990s. At the end of 1980s, PP-R was a new generation pipe material, which was randomly homogeneously polymerized about 5% PE in the molecular chain of PP by gas phase copolymerization. It has better impact resistance and long-term creep properties.
PPR pipe advantages: moderate price, stable performance, heat preservation, corrosion resistance, smooth inner wall does not scale, safe and reliable pipeline system, and does not penetrate, service life of up to 50 years. Known as never scale, never rust, never leakage, green advanced water supply materials.
PPR pipe shortcomings: construction technology requirements, need to use special tools and professionals to carry out construction, in order to ensure system safety.
PPR pipe applications:
(1) hot and cold water systems of buildings, including central heating systems; - The heating system in the building, including the floor, wainscoting and radiant heating system;
- Pure water supply system that can be directly drunk;
(4) Central (centralized) air-conditioning system;
5, transport or discharge of chemical media and other industrial pipeline system. - Aluminum-plastic composite water supply pipe
Aluminum-plastic composite pipe is earlier to replace the cast iron pipe of the water supply pipe, its basic composition should be five layers, that is, from the inside out in turn for plastic, hot melt adhesive, aluminum alloy, hot melts, plastic.
Aluminum-plastic composite pipe has good thermal insulation performance, the inner and outer walls are not easy to corrosion, because the inner wall is smooth, little resistance to fluid; And because it can be bent at will, the installation and construction is convenient.
There are three main types of aluminum-plastic water pipes in the market:
1、PE／AL／PE
2、PE／AL／PEX
3、PEX／AL／PEX
One is that the inner and outer layers are polyethylene, the second is the inner layer is crosslinked polyethylene, and the outer layer is polyethylene; the third is that both the outer and inner layers are cross-linked polyethylene and the middle layer is aluminum. One is generally used in cold water piping systems and the latter two are generally used for hot water piping. Click here to download Construction Technical Information for free
4, copper pipe
Also known as copper pipe. A kind of non-ferrous metal pipe, is pressed and drawn seamless pipe.
Advantages: the copper pipe is hard, not easy to corrosion, and high temperature resistance, high pressure resistance, is a better water supply pipe material.
Cons: High price.
5, thin wall stainless steel pipe
Wall thickness of 0.6 ~ 2.0mm stainless steel strip or stainless steel plate, with automatic argon arc welding and other fusion welding process made of pipe.
The domestic thin-wall stainless steel pipe is a new type of pipe which came out at the end of the 1990s, because of its safety and health, high strength, good corrosion resistance, durable, long life, maintenance free, beautiful and other characteristics, At present, the stainless steel pipe has a strong development momentum, and has been widely used in building water supply and drinking water pipes.
Thin Wall Stainless Steel Tube ( Light gauge stainless pipes） Has the following outstanding advantages: excellent mechanical properties, superior wear resistance, good safety and hygiene performance, good temperature resistance, thermal insulation performance, smooth inner wall water resistance small; Beautiful appearance, clean, fashionable, recyclable; Be conducive to saving water resources; Wide range of use; Long service life and low cost.
Hot dip galvanized steel pipe
Galvanized steel pipe is divided into cold galvanized pipe, hot galvanizing pipe, the former has been banned. Hot-dip galvanized pipe is to make molten metal react with iron matrix to produce alloy layer, so that the substrate and the coating combined. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The complex physical and chemical reactions between the hot dip galvanized steel pipe substrate and the molten bath result in a dense zinc-iron alloy layer with corrosion resistance. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. So its corrosion resistance is strong.
7, welded steel pipe
Can be divided into straight seam welded pipe and spiral welded pipe. The utility model can be used in the fire water supply network. It has the advantages of high strength and strong strain resistance, but its corrosion resistance is poor, so it should be treated with anti-corrosion. The same diameter of the steel pipe has a different thickness, so the wall thickness should be specified in the selection.
Straight seam welded pipe: simple production process, high production efficiency, low cost, rapid development.
Spiral welded pipe: generally higher strength than straight seam welded pipe, can use narrow billet production pipe diameter larger, can also use the same width of the blank production diameter of different welded pipe. However, compared with the straight seam pipe with the same length, the weld length increases by 30 ~, and the production speed is lower. Therefore, the smaller diameter welded pipe mostly use straight seam welding, large diameter welded pipes are mostly spiral welding. - Polyethylene (PE) pipes
The PE pipe is processed without adding heavy metal salt stabilizer, the material is non-toxic, non-fouling layer, and does not breed bacteria. The secondary pollution of urban drinking water is well solved. In addition to a few strong oxidizer, resistant to a variety of chemical media erosion; No electrochemical corrosion. At rated temperature and pressure, PE pipe can be used safely for more than 50 years. PE pipe toughness, high impact strength, weight directly over the pipe, will not cause pipe rupture. The strength of the hot-melt or electromelt joints of PE pipes is higher than that of the pipe body, and the joints will not break off due to soil movement or live load. The pipeline has the advantages of light weight, simple welding process, convenient construction and low comprehensive cost. - Acrylonitrile-butadiene-styrene (ABS) engineering plastic water supply pipe
The material for manufacturing pipe is a mixture of acrylonitrile, butadiene and styrene, in which ABS resin is the main ingredient, and only the additives needed to improve its physical, mechanical and processing properties are added. The additives should be uniformly dispersed. The density of acrylonitrile butadiene styrene (kg / m3) is: 1000 ≤ ρ≤ l070. The content of acrylonitrile in propylene wax-Butadiene styrene raw material should be more than 20 (mass fraction), and the other components should be less than 5% (mass percentage). Material should be made into pipe, according to the provisions of GB / T 18252 test, smaller requirements strength MRS ≥ 14 MPa, overall use (design) coefficient C value of 1.6.
The production of ABS pipes and fittings shall comply with the provisions of GB / T 20207. The chlorinated polyvinyl chloride (CPVC) piping system for the transportation of drinking water shall comply with the requirements of GB / T 17219-1998.
According to the chemical resistance and hygiene of the material, Applicable to pressure water supply and drainage transportation, sewage treatment and water treatment, petroleum, chemical, power electronics, metallurgy, mining, electroplating, papermaking, food and beverage, air conditioning, medicine and other industrial and construction field powder, liquid and gas and other fluid transportation.
