Construction and installation requirements of gas pipeline

The construction and installation of gas pipeline requires that in the traditional natural gas transmission and distribution scheme, steel pipe and cast iron pipe both occupy a large proportion. However, with the passage of time, more and more attention has been paid to the corrosion resistance, unchanged transportation and installation, and high cost of steel pipes. Because of its long service life, good wear resistance and toughness, convenient and fast construction, low maintenance cost and low comprehensive cost, it is gradually becoming the first choice material for urban natural gas pipelines.

Natural gas pipeline plays an important role in urban natural gas engineering, and its cost accounts for about 40% of the whole project, so its economy and economy are very important. The construction cost of pe pipe is low, which is characterized in that the cost of PE pipe is lower than that of steel pipe, and its service life can reach 50 years, and the service life of steel pipe can reach 18 years. Secondly, the PE pipe has good toughness, as long as the steel pipe is inserted into the pipeline, there is no need to dig a working pit, and there are few construction parties, which saves the construction cost; In addition, the nondestructive testing cost of P-type steel pipe is high, while the testing method of pe pipe is simple and the testing cost is low. Generally speaking, polyethylene gas pipeline has low investment cost and good economic operation.

In urban construction and other buildings, due to too many professional pipelines, PE gas pipelines are very flexible in complex environments. In the case of narrow space, large-angle bending can be realized through the flexibility of PE.

PE gas pipeline is a kind of high molecular polymer polyethylene, which has stable chemical properties, acid and alkali resistance, and the corrosion effect of stray current and chemicals on the pipeline is relatively weak. However, PE gas pipeline does not need special anticorrosion when laying, and its service life can reach more than 50 years.

Because of its light weight, PE pipes do not need to be transported by lifting machinery during operation, while PE pipes are usually welded by hot melt welding, which has the advantages of high automation, portability, convenient welding construction, low labor intensity and high efficiency. PE pipe has good flexibility, and will not produce open flame in actual maintenance and repair, thus reducing the danger of maintenance work. In addition, PE gas pipeline has obvious advantages in trenchless pipeline construction, especially in cities with vertical and horizontal pipelines such as buildings and roads, because it has many advantages such as convenient construction, fast welding speed and large deflection.

The above is the main content of gas pipeline construction and installation requirements. I believe everyone knows about these contents. I hope this article can give you some help.