It is a long strip of steel with a hollow section and no seams around it. Steel pipes have a hollow section and are used in large quantities as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when it has the same bending and torsional strength. It is an economical section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycles. Shelf and steel scaffolding used in construction. The use of steel pipes to manufacture ring-shaped parts can improve material utilization, simplify manufacturing processes, save materials and processing man-hours, such as rolling bearing rings, jacks, etc., and have been widely used in steel pipes. The quality of the pipe directly determines the quality of the pipe. Construction engineering, power plants, chemical plants, etc. use such pipes, there are implementation standards GB/T5310, for high-pressure boilers: there are implementation standards GB/T8163, seamless pipes for conveying fluids: there are implementation standards GB3087, seamless steel tubes for low-pressure boilers . 1. Long-term temperature and pressure resistance performance: China's floor heating design generally uses 40-60 ° C hot water, the design pressure is generally 0.4-0.6 MPa. Due to the different temperatures and pressures experienced by the pipe in different seasons, it is difficult to calculate the allowable stress of the pipe under such conditions. In order to facilitate the designer to choose the wall thickness of the pipe, the international standard calculates and simplifies the use conditions of the floor heating, forming the conditions of use specified in ISO10508:1995 "Thermoplastic pipes and fittings for hot and cold water systems". Level 4, ie 2.5 years at a design temperature of 20 °C, 20 years at 40 °C, 25 years at 60 °C, 2.5 years at a maximum temperature of 70 °C, and 100 hours at a fault temperature of 100 °C, total With a service life of 50 years, this condition requires the pipe to have a certain long-term temperature and pressure resistance. 2. High reliability: Since the floor heating is a concealed project, the pipe is hit in the concrete, and the service life requirement of the pipe is basically the same as that of the house. Once the problem occurs, it is not easy to judge the problem, and the loss is far. It is much higher than the value of the pipe itself, so the pipe is required to have high reliability. In this respect, the quality of the pipe itself is required to be reliable. On the other hand, the construction performance of the pipe is required to be scratch-resistant and impact-resistant, because the pipe is inevitably subjected to some friction and impact during the construction process. 3. High flexibility: In order to ensure the reliability of the pipeline system, the floor heating pipe should generally not have joints. This requires the use of the entire pipe, which requires the pipe to be soft enough for easy construction. The method of distinguishing the authenticity of the floor heating pipe Many times when people choose the floor heating pipe, the floor heating company will have several kinds of floor heating pipes for you to choose. Because the quality of the floor heating pipe is different, the price of the floor heating is naturally different, so it is good or bad to distinguish the floor heating pipe. It is also necessary to start with the necessary characteristics of the floor heating pipe, and now we will introduce you to several commonly used methods: First, look at the appearance of the floor heating pipe, the quality of the floor heating pipe is relatively smooth without bumps, bubbles, obvious color difference and impurities, and the floor heating pipe indicates the type, specification and brand of the floor heating pipe. The printing on the good floor heating pipe is clear and not easy to fall off. Second, the hand to feel whether the pipe has a groove, the quality of the pipe feels delicate, smooth, moderate hardness. Third, compare the flexibility and wall thickness of the floor heating pipe, the wall thickness of the general heating pipe is marked as 2.0, and some floor heating pipes are marked with a wall thickness of 2.0, but the wall thickness is actually not up, but the quality of the floor heating pipe is good. The wall thickness is achievable and is consistent with the label. When you look at the tube alone, you can compare it with two types of tubes to see which tube has a thicker wall. Fourth, to the inspection department monitoring, to the inspection department is the method used when the floor heating pipe is suspected. Under normal circumstances, the floor heating pipe used by the floor heating company is a qualified product, and there are test reports and warranty commitments, simple pipe The quality inspection method can be carried out by the naked eye and the hand, but the detection method of the performance index can only be carried out in the laboratory. Double Layer Soap Basket,2-Tier Soap Basket,Brass Soap Basket ZheJiang Haotianchi Sanitaryware Co Ltd , http://www.htc-faucet.com