Steel-plastic winding drain pipes have been widely used

At present, the domestic drainage pipe market is mainly divided into two types: metal and plastic drainage pipes. The representatives of its mainstream products are cast iron pipes and UPVC pipes. These two kinds of pipes have been used in domestic construction and installation projects for a long time. After years of engineering practice, their advantages and disadvantages have been widely known. In recent years, the new plastic drainage pipes with grooved pressure rings as the connection method and high-density polyethylene (HDPE) as the material in the drainage pipe market have both the advantages of traditional plastic pipes and metal pipes, and have their own excellence. The performance quickly attracted the attention of the majority of engineers and technicians. Based on years of professional design and engineering practice experience in medical buildings, the author believes that the high-density polyethylene (HDPE) drainage pipes connected by grooved pressure rings have its own unique advantages in the indoor drainage system of medical buildings.

First of all, the basic performance of drainage pipes should have good hydraulic properties. Similar to general plastic pipes, HDPE pipes also have a smooth inner surface, the roughness coefficient of the inner wall of the pipe is about 0.010, the water flow resistance is small, and it has a higher liquid transport capacity than cast iron drainage pipes, so that the drainage system in the building is smoother. In addition, HDPE pipe has good anti-ultraviolet ability, and it will not be aged and embrittled due to ultraviolet radiation when stored in the open air. Buried pipes can be safely used for more than 50 years in the range of -60°C ~ 60°C. And the ordinary UPVC pipe - the general non-exposure life is only about 15 years. In terms of the combustion characteristics of materials, ordinary UPVC pipes are combustible materials, and a large amount of harmful gases will be produced when incinerated, which will seriously pollute the environment, while HDPE pipes are slow-burning materials, which are free of toxins and F when burning. However, as a drainage pipe used in medical buildings, it should have good mute performance. HDPE pipe has a low material density (about 950Kg/m3), is softer and more elastic than cast iron pipe, plays the role of shock absorption and absorbs audible sound waves, and has excellent noise reduction effect; its unique grooved pressure ring connection is a flexible The two pipe fittings are separated by a C-shaped sealing ring, which has the effect of damping and blocking the transmission of sound waves.

Another performance suitable for medical buildings is that it has good chemical stability. Generally, factors such as soil, electricity, acid and alkali in the environment will not damage the pipeline, nor will bacteria, microorganisms or moss grow. The safe discharge of bacteria-bearing wastewater in the building provides a guarantee for the environmental sanitation in the building. Except for a few strong oxidants at room temperature, most of the chemicals do not work for HDPE pipes, which is a large and medium-sized public health center. The selection of laboratory drainage pipes in construction projects such as the Centers for Disease Control and Prevention provides a basis. The use of HDPE drainage pipes can discharge chemical wastewater with high pH and alkalinity all year round, without worrying about corrosion of pipes and other chemical effects damage caused by use. The ordinary UPVC pipe plastic pipe does not have the performance of acid and alkali corrosion resistance. The cast iron drainage pipe needs to be coated with a corrosion-resistant material layer before it can be used to discharge chemical wastewater, but the corrosion resistance effect is far less than that of the HDPE pipe.

Later, in order to actively respond to the national promotion call of "replacing steel with plastic", HDPE pipe as a new type of plastic drainage pipe quickly emerged in the market with its superior performance and low price. Hdpe Drainage Pipe in Medical The indoor rain and sewage drainage system of construction projects has broad application prospects.