1. What are the general contents of the inkjet code on the water pipe?
The surface of the PPR pipe usually has a series of inkjet codes, which are composed of text and numbers. The spray code on the water pipe generally contains brand information, product specifications, industry standards, operating specifications, production dates, etc.
2. The code can be erased, is this normal?
In order not to damage the surface of the pipe, the printing on the PPR pipe that we generally see uses environmentally friendly ink jet coding technology. The coding is only attached to the surface of the pipe, and will not penetrate or chemically react with the pipe material. Due to the smooth surface of the pipe, the related content printed by ink jet coding will fade or disappear with continuous friction for a long time, which is a normal phenomenon and does not have any impact on the quality of the product itself.
3. White edges appear on the cut surface of the water pipe. Is there a problem with the material?
PPR raw material is commonly known as random copolymer polypropylene, which is a kind of polymer. The appearance of white edges after cutting is a peculiar property of plastic polymers. It means that under the action of tensile stress, the polymer has stress concentration in some weak places of the material to produce local plastic deformation, which is called "crazing phenomenon" , After heating, the silver streak will disappear.
4. Is pure copper used for water pipe fittings?
The metal used to make water pipe fittings is generally brass. Brass is an alloy composed of copper and zinc. Brass has strong wear resistance and hardness, and its physical properties have been proven to be suitable for the manufacture of valves, water pipes, connecting pipes for internal and external air conditioners, and radiators. Because of its relatively soft texture, pure copper is not suitable for making pipe fittings. Its good conductivity and ductility are suitable for making wires and other materials. In appearance, the color of brass is yellowish, while the color of pure copper is reddish-purple.
5. The thicker the wall thickness of the water pipe, the better the pressure resistance?
The pressure resistance of water pipes is indeed closely related to the thickness of the pipe wall. If the same material or similar materials are used, the thicker the wall thickness, the stronger the pressure resistance. The SDR coefficient of the pipe, which means the standard size ratio, is the ratio between the nominal outer diameter of the pipe and the nominal wall thickness, and is an important parameter that determines the ability of the pipe to withstand internal pressure. It is recommended to use SDR6 pipes during decoration, that is, the wall thickness of the 6-division pipe is 4.2mm and the wall thickness of the 4-division pipe is 3.4mm. However, the pressure resistance of different pipeline products cannot be judged only by the wall thickness, and the characteristics of the raw materials themselves need to be considered.
6. Regarding the question of water pipe specifications, how to choose?
The choice of indoor piping specifications mainly depends on the specifications of household water pipes. Domestic household water pipes are generally 25mm in size, which is commonly known as 6 in charge. In principle, the specifications of the water pipes connected to the house should be less than or equal to the specifications of the household water pipes. According to the usage habits of different regions, the size of the house and the number of water outlets, most houses choose 25mm 6 in charge and 20mm 4 in charge. , Can meet the needs of use.
7. What do different industry standards mean?
Every country and region will use some standards to regulate the development of related industries. In the PPR pipeline industry, we usually have standards such as EN/DIN/GB. EN stands for European Union standards, DIN stands for German standards, and GB stands for Chinese national standards.
