The TX that is being renovated is often full of doubts about what kind of pipe to choose. In fact, as long as you understand the basic knowledge of the pipe, it is not difficult to pick.
Water supply fittings
In the past, pipes used for water supply were mainly cast iron pipes. Sand cast iron pipes are mainly used outdoors, and galvanized cast iron pipes are used indoors. They can be divided into cold (electric) galvanized and hot galvanized. China has stipulated the elimination of sand mold castings and cold galvanized cast iron pipes on June 1, 2000, and gradually restricted the use of hot-dip cast iron pipes, and promoted the use of aluminum-plastic composite pipes and plastic pipes. Therefore, there are three major categories of pipelines currently in use. The first category is metal pipes, such as hot-dip cast iron pipes, steel pipes, stainless steel pipes, etc. The second category is plastic compound metal pipes, such as plastic compound steel pipes and aluminum plastic composite pipes. The third category is plastic pipes, such as PP-R (cross-linked polypropylene high-density mesh engineering plastics).
The State also stipulates that various pipes and fittings involving drinking water pipelines must be approved by the Ministry of Health before they can be sold.
Plastic code and meaning commonly used in water supply pipes:
PP―R crosslinked polypropylene high density mesh engineering plastic
PE high density polyethylene
PP Polypropylene
PB polybutylene
PEX cross-linked polyethylene
Comprehensive performance requirements for water supply pipelines
As a water supply pipeline, health, safety, energy saving, and convenience are required. Therefore, the inspection of a pipeline should be checked from four aspects. That is health: Pipes and fittings must have no harm to the human body. Safety: Has sufficient strength and excellent mechanical properties as well as anti-aging, heat resistance and other properties. Energy-saving: smooth inner wall, corrosion resistance, low resistance to fluids, good insulation performance. Convenient: The connection, construction is convenient, reliable, and has the possibility of promotion and use.
Failure to meet the above four requirements will impair the user's physical health and property safety.
Several kinds of water supply pipes
1 aluminum plastic composite pipe
Aluminum plastic composite pipe is the first water pipe to replace the cast iron pipe, and its basic composition should be five layers, that is, from the inside to the outside in order of plastic, hot melt adhesive, aluminum alloy, hot melt adhesive, plastic.
The aluminum-plastic composite pipe has better thermal insulation performance, and the inner and outer walls are not easy to be corroded. Because the inner wall is smooth, the resistance to the fluid is very small, and because it can be bent freely, the installation is convenient. As a water supply pipe, aluminum-plastic composite pipe has sufficient strength, but if the lateral force is too large, it will affect the strength, so it should be used as a clear pipe or buried in the wall, but it should not be buried underground. The connection of the aluminum-plastic composite pipe is clip-type, so the first one is to pass strict pressure test to check if the connection is firm. The second is to prevent frequent vibration and loosen the ferrule. Third, the length of the installation should be enough to avoid pulling.
2, plastic copper pipe
The plastic-reconstituted copper pipe uses pure copper (copper) as the pipe fitting and is covered with PE plastic. From the perspective of comprehensive performance, the plastic-reconstituted copper pipe is slightly better than the aluminum-plastic composite pipe. For example, better strength, longer life, better heat resistance. However, the insulation performance is slightly worse.
Pure copper has extremely high corrosion resistance. After a certain period of use, a layer of green oxide appears on the inner surface. But basically no effect on the life of the pipe, the flow rate, and the resistance to the fluid. The patina is harmless to human health and has a certain ability to kill bacteria. There are two types of plastic copper tube installation methods: card sleeve type and welding type. Welding type is more reliable.
Copper tube, stainless steel tube:
In addition to the poor thermal insulation properties of these types of pipes, other indicators such as strength and life-span resistance to fluids are all very good. They should be used as cold water pipes. If used for hot water transportation, insulation jacket should be added. The connection method is mainly card sleeve type, and the copper tube can also be welded.
Inner plastic galvanized cast iron pipe:
That is, a layer of plastic is embedded in the inner wall of an ordinary galvanized pipe, so that it has the characteristics of corrosion resistance, low resistance, good insulation, and high strength of the galvanized pipe itself. Most of these pipes use ribbed connections.
plastic pipe:
As long as the material of the plastic pipe meets the requirements of the standard, it can have sufficient strength, longevity, safety and hygiene. It is the best insulation in all pipes. The plastic pipe adopts hot-melt welding and has a high degree of reliability. As long as the construction is correct, there will be no leakage and shedding at the pipe joint where pressure testing is normal.
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Acorn nuts are a type of fastener that resemble the shape of an acorn, hence their name. They are typically made of metal, such as steel or stainless steel, and feature a domed top with a threaded hole in the center. Acorn nuts are commonly used in various applications to secure bolts or screws, providing a finished and decorative appearance. They are often used in outdoor or exposed settings due to their ability to protect the threaded end of a fastener from damage or corrosion. Acorn nuts are available in different sizes and finishes to match the specific requirements of a project.
Stainless steel fasteners are hardware components made from a corrosion-resistant alloy of steel and chromium. They are commonly used in various industries and applications due to their durability and resistance to rust and staining. Here are some ways to describe stainless steel fasteners:
1. Corrosion-resistant: Stainless steel fasteners are designed to withstand exposure to moisture, humidity, and other corrosive elements without rusting or deteriorating.
2. High strength: These fasteners offer excellent tensile strength and can withstand heavy loads and high-pressure environments.
3. Durable: Stainless steel fasteners are known for their long-lasting performance, making them suitable for both indoor and outdoor applications.
4. Versatile: They are available in various sizes, shapes, and designs, allowing for a wide range of applications in construction, automotive, marine, and other industries.
5. Aesthetic appeal: Stainless steel fasteners have a sleek and polished appearance, making them visually appealing and suitable for applications where aesthetics matter.
6. Non-magnetic: Unlike other types of fasteners, stainless steel fasteners are non-magnetic, making them suitable for applications where magnetism can interfere with equipment or machinery.
7. Easy to maintain: Due to their resistance to corrosion, stainless steel fasteners require minimal maintenance and can be easily cleaned with mild soap and water.
8. Environmentally friendly: Stainless steel is a recyclable material, making stainless steel fasteners an eco-friendly choice for sustainable construction and manufacturing practices.
9. Wide temperature range: Stainless steel fasteners can withstand extreme temperatures, making them suitable for applications in both hot and cold environments.
10. Reliable and safe: Stainless steel fasteners are known for their high-quality and reliability, ensuring the safety and integrity of the structures or equipment they are used in.
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