[Summary description]
The materials of punching elbows are carbon steel, stainless steel, alloy steel and other materials. Carbon steel punching elbows are cheap and used in large quantities. The alloy steel elbow is used in a special position.
Punching elbows are used in the connection of water supply pipelines, water vapor pipelines, gas pipelines and oil pipelines. The punching elbow is black in color, curved at a right angle, excellent in quality, wear-resistant and not easy to damage. The standard of punching elbow is 1/2-10 inch, and the products are widely used in pipeline equipment, equipment, supporting and other functions in petroleum, chemical, metallurgy, electric power and other industries.
Punching elbows are made of carbon steel, stainless steel, alloy steel and other materials. Carbon steel punching elbows are cheap and used in large quantities. The alloy steel elbow is used in a special position.
The main difference between a punching elbow and a carbon steel elbow is the difference in material. The chemical composition it contains will keep the surface of the elbow from rusting for a long time, and it is not easy to be corroded.
Below we will introduce the characteristics of punching elbows in detail.
1. Environmental protection: PE-RT can be recycled and used without polluting the environment. However, if PEX cannot be recovered, secondary pollution will occur; the development trend of punching elbow pipes: the materials of punching elbows not only have qualified creep rupture curves, but also have moderate pipe quotations, and the construction is more convenient and convenient than other types, and the connection method belongs to the current stage. The most reliable method of in-situ mutual fusion and hot-melt connection, the hole diameter of the pipe fitting is larger than the inner diameter of the same standard pipe. Since there is no mechanical connection method for partial diameter reduction in the system, the fluid resistance of the system is relatively small.
Second, the long-term pressure resistance function, only in terms of stress, the pressure resistance function of the national standard punching elbow is the best. However, due to various factors, the actual wall thickness of the floor heating pipe is generally 2mm. Under this wall thickness, all kinds of pipes can meet the needs of floor heating, and the pressure resistance advantage of punching elbow pipes cannot be shown;
3. Low-temperature thermal shock resistance: PE–RT and PEX have better low-temperature shock resistance. During construction in winter, the pipe is not easy to be impacted and ruptures, which increases the flexibility of the construction organization.
Fourth, the pressure resistance of the punching elbow is the best. However, due to various factors, the actual wall thickness of the floor heating pipe is generally 100%, and under this wall thickness, all kinds of pipes can meet the needs of floor heating, and the pressure resistance advantage of the national standard punching elbow pipe cannot be shown; thermal conductivity: use The pipes for floor heating need to have good thermal conductivity.
