Why does the Ministry of Construction promote the use of stainless steel water pipes?
TIME：2017-07-17 14:45:00 Clicks：
At present, the pipeline supplied on the market mainly consists of galvanized steel pipe, galvanized steel pipe lined with plastic, PVC plastic pipe, PP-R plastic pipe, aluminum-plastic composite pipe, copper pipe, cladding copper pipe, stainless steel lined with plastic, stainless steel outside the plastic pipe, all stainless steel pipe and so on. In the face of such a large number of pipes, the user how to choose?
Let us analyze the main features of these pipes, so as to correctly and reasonably select the pipe.
Galvanized steel pipe is cheap, high mechanical strength, but easy to rust, easy to scale the inner wall of the pipe and will breed bacteria, short service life, in the field of water supply is out of the banned products. Lined galvanized steel pipe is a product of poor consideration. It makes the pipe become thick and clumsy, but also increased manufacturing costs, and failed to eliminate the galvanized steel pipe connection threads are most likely to corrosion damage, short service life defects, so it is an inappropriate to promote the use of the product.
PVC and PP-R pipe belongs to the same category of plastic pipe, which is characterized by easy manufacturing, light weight, low price. But the mechanical strength is low, poor resistance to damage, easy to aging, slightly toxic (polypropylene is non-toxic, but plasticizers, masterbatch have a certain degree of toxicity). If the production plant to reduce the quality of adulteration is also difficult to discern, it is only suitable for low requirements, short-term use of the occasion.
Aluminum-plastic composite pipe has the advantages of easy bending, long-distance transmission with a small number of pipe joints, easy transportation of tubes and so on. However, there is a serious bottleneck phenomenon at the connection between the tube and the joint, resulting in a large loss of flow. And the connection of the pipe and the joint, such as more than two times, repeated installation will appear after the phenomenon of pressure resistance, tensile strength significantly reduced. In addition, due to the joints made of brass, the joints are easy to produce copper green, the surface may have lead and other harmful metal substances precipitation, so now generally have not aluminum-plastic composite pipe used for direct delivery of drinking water.
Copper pipe has a periodic inhibition of bacterial growth. Mechanical strength, resistance to damage is also better, but it is not acid-resistant, easy to oxidize in a humid environment to produce copper green, copper green is also a toxic substance. In addition, because of its thermal conductivity is too large, such as for the delivery of hot water must be good insulation.
Plastic composite copper pipe to eliminate the defects of copper pipe heat dissipation too quickly, but lead to an increase in production costs. And produce the outer plastic layer is easy to aging and shorten the service life of the defects.
Stainless steel lined with plastic, plastic pipe is a poorly considered products. Because the service life difference between stainless steel and plastic is too large, so it should not promote the use of the product.
Thick-walled full stainless steel pipe is the most ideal pipe in terms of performance due to its corrosion resistance, non-pollution, excellent mechanical properties, good resistance to damage, low thermal conductivity, durability, luxurious appearance and many other advantages. Because of this, in the pharmaceutical, chemical and beverage industries have long used all stainless steel piping system. Japan, Germany, some areas of the water supply network has been fully adopted all stainless steel piping system. But the traditional thick-walled stainless steel piping system due to stainless steel material consumption, expensive, subject to the constraints of the economy with the ability to municipal water supply and construction of water supply areas have not been popularized.
Thin-walled stainless steel pipe which is a new generation of China's leading water pipe in the world, the system abandons the traditional threaded stranded teeth connection, with homogeneous plug joints, to achieve a sealed connection of the pipeline, so you can thin the stainless steel pipe wall, so that the cost of pipeline laying is greatly reduced (similar to the copper pipe). According to the actual measurement, the working pressure of the thin-walled all-stainless steel pipeline system can reach more than 2.5Mpa, its low thermal conductivity, is 1/25 of the copper pipe, 1/4 of the iron pipe, the heat preservation effect is one of the best of all metal pipelines, and it can be used for a long time in the temperature range of -40℃~120℃. Because of its excellent performance in all aspects, the Ministry of Construction has been listed below as a priority water pipe.
About US
Products
Cases
Honor
Knowledge
Guide
News
Contact us
