1. Galvanized steel pipe: Galvanized steel pipe Welded steel pipe with hot dip or galvanized coating on the surface. The price is cheap, the mechanical strength is high, but it is easy to rust, the inner wall of the tube is easy to scale and will breed bacteria, and the service life is short. Galvanized steel pipes are widely used in the manufacturing industries of electric power, railway vehicles, automobile industry, highways, construction, machinery, coal mines, chemicals, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, mining machinery. Commonly used connections are threaded and flanged.

2. Stainless steel pipe: This is a kind of common pipe. It belongs to a kind of steel pipe. It is divided into seamed steel pipe and seamless steel pipe. Its main features are: corrosion resistance, impermeability, good air tightness, smooth inner wall and weight. Light, easy to install, high pressure, but expensive. Mainly used in food, light industry, petroleum, chemical, medical, mechanical instrumentation and other industrial pipelines and mechanical structural components. Commonly used connection methods are compression type, compression type, live type, push type, push thread type, socket welding type, union type flange connection, threaded pipe connector connection, welding type and welding and traditional connection phase. Combined derivative series connection.

3. Copper tube: Copper tube, also known as copper tube, with colored metal tube, is a pressed and drawn seamless tube. The copper tube has corrosion resistance, sterilization, light weight, good thermal conductivity, and the disadvantage is cost. High, high construction requirements, thin pipe wall, easy to break. Copper pipes are widely used in heat exchange fields, such as hot water pipes and condensers. The main connections of the copper pipe are threaded connection, welding, flange connection, special pipe connection, and the like.

4. Lined stainless steel composite pipe: lining thin-walled stainless steel, composite thin-walled stainless steel pipe on the inner wall of steel pipe, making the base pipe and the lining stainless steel pipe tightly connected, that is, lining stainless steel composite pipe, the advantage is that it can be welded, not Scale, no nodulation, corrosion resistance, high temperature resistance, the disadvantage is higher price, high process requirements, and hard material strength. Widely used in cold water pipes, industrial, food chemical plant raw liquid, fluid transport and other fields. There are many main connection methods, such as welding, flange connection, groove connection, thread connection, and pipe connector connection.

5. Glass steel pipe: Glass steel pipe is also called glass fiber wound sand pipe (RPM pipe). The glass fiber and its products are mainly used as reinforcing materials, and the unsaturated polyester resin and epoxy resin as the basic materials are used as the basic materials, and inorganic non-metallic particulate materials such as quartz sand and calcium carbonate are used as the main raw materials. The advantages are good corrosion resistance, anti-aging, heat resistance, good frost resistance, light weight, high strength, good wear resistance, shortcomings such as brittleness and poor wear resistance. Commonly used in hardware tools, garden tools, alkali-resistant anti-corrosion engineering, machinery, chemical and other fields. The main connection methods are double socket socket joints, flexible joints, socket joints, flanges and other connection methods.

6. PVC pipe: PVC is also called polyvinyl chloride. PVC can be divided into soft PVC and hard PVC. Soft PVC is generally used for the surface of floor, ceiling and leather. However, due to the plasticizer contained in soft PVC, the physical properties are poor. (As the water pipe needs to withstand a certain water pressure, soft PVC is not suitable for use), so its scope of use has been limited. Hard PVC does not contain plasticizers, so it is easy to form and has good physical properties, so it has great development and application value. It is used for surface packaging of various types of panels, so it is also called decorative film and adhesive film. It is widely used in many industries such as building materials, packaging, medicine, etc. It is characterized by green environmental protection, reduced water energy, acid and alkali corrosion resistance, and inner diameter. It is smooth and easy to construct. The disadvantage is that it should not be used in hot water pipes. It is polluted by low quality and fake, and is easily cracked by impact. The main connection methods are flange connection, welding, socket bonding, threaded connection, and non-metallic pipe connector connection.

7. HDPE pipe: [HDPE pipe] High-density polyethylene pipe, the material is "HDPE", HDPE is a kind of high-crystallinity, non-polar thermoplastic resin. The original HDPE has a milky white appearance and a semi-transparent shape in a thin section. HDPE pipes must withstand a certain pressure, usually PE resin with high molecular weight and good mechanical properties, such as HDPE resin. The strength is 9 times that of ordinary polyethylene pipe (PE pipe); HDPE pipe is mainly used for: municipal engineering water supply system, building indoor water supply system, outdoor buried water supply system and residential community, plant buried water supply system, old pipeline repair, Water treatment engineering piping systems, industrial water pipes for gardening, irrigation and other fields. Medium density polyethylene pipes are only suitable for conveying gaseous artificial gas, natural gas, and liquefied petroleum gas. The low density polyethylene pipe is a hose.

8. PP-R pipe: PP-R pipe is also called three-type polypropylene pipe. It is the most widely used water supply pipe in home decoration project. It has heat preservation, energy saving, non-toxicity, light weight, corrosion resistance and no scaling. The advantages are long service life, and the disadvantages are that the connection is random, there is a risk of cracking, the low temperature resistance is poor, the expansion coefficient is large, and the aging resistance is poor. PP-R pipes are widely used in urban gas, building water supply and drainage, industrial fluid transportation, urban and rural water supply and drainage, agricultural irrigation and other construction industries, power and cable sheathing, municipal, industrial and agricultural fields. The commonly used connection methods are hot melt connection, threaded connection, and special flange connection.

9. Aluminum-plastic composite pipe: Aluminum-plastic composite pipe is the first water supply pipe to replace cast iron pipe. Its basic composition should be five layers, that is, plastic, hot melt adhesive, aluminum alloy, hot melt adhesive and plastic from the inside to the outside. The aluminum-plastic composite pipe has good thermal insulation performance, and the inner and outer walls are not easy to corrode. Because the inner wall is smooth, the resistance to the fluid is small; and because it can be bent at will, the installation and construction are convenient. As a water supply pipe, long-term thermal expansion and contraction is easy to leak, and it will be hard to repair and inconvenient. It is applied to hot and cold water piping systems, indoor gas pipeline systems, and solar air conditioning piping systems.

10. PE pipe: [PE pipe] is a polyethylene plastic pipe. PE is the most basic plastic and has excellent resistance to most domestic and industrial chemicals. Advantages: non-toxic, odorless, odorless, good heat resistance and cold resistance, simple construction, disadvantages: sensitive to chemicals, easy to crack, not easy to dye, its connection method is electric welding, hot melt butt joint, flange, thread , threaded connection, etc.