PE Gas Pipe

Introduction of PE gas pipe

PE gas pipe adopts gas polyethylene pipe with many excellent properties and is used in the field of gas transmission. It will completely solve the problems of corrosion and joint leakage of steel pipes and cast iron pipes, thus ensuring the safe operation of the gas pipe network system. The PE material selected for the PE gas pipe is an inert material, which can resist the erosion of various chemical media. The friction coefficient of the pipe wall is low, the flow resistance is small, and the conveying capacity is strong. The length is generally more than 500%, and the PE gas pipe has good shock resistance, slow crack growth (SCG), rapid crack growth (RCP) resistance, flexibility and scratch resistance.

PE gas pipe has very strong adaptability to the uneven settlement of the pipe foundation, strong wear resistance, and can adopt a variety of trenchless methods, which greatly facilitates the construction and installation of the work, the system cost is low, the maintenance cost is low, and the engineering cost.

PE gas pipe executive standard

PE gas pipe implements the national GB15558.1-2003 standard.

Appearance of PE gas pipe: At least 3 yellow strips should be extruded on the black pipe, and the color strips should be evenly distributed along the circumference of the pipe.

Application of PE gas pipe

Polyethylene (PE) gas pipelines have been successfully used in the field of gas transmission and distribution due to their long service life, excellent corrosion resistance, reliable connection performance and safety performance, and low construction and maintenance costs. Many advantages are favored by the majority of gas industry households. According to the different grades of raw materials, polyethylene gas pipes are divided into two grades: PE80 and PE100; according to the standard size ratio, they are divided into two series, SDR11 and SDR17.6, of which the SDR11 series can be used for natural gas, liquefied petroleum gas (gaseous) and For the transmission and distribution of various gaseous media such as artificial gas, the SDR17.6 series is suitable for the transmission and distribution of natural gas.

Product Description:

1. The product implementation standard is: CJ/T189-2007 "Steel mesh skeleton plastic (polyethylene) composite pipe and pipe fittings".

2. Composite pipes of the same specification and different pressure levels have different wire diameters and grid parameters.

3. The nominal pressure is the maximum working pressure of the pipe to transport the water medium at 20°C. If the medium temperature changes, it should be corrected according to the "nominal pressure correction coefficient value".

4. The color of the pipe is generally black, the gas pipe is black or blue, and the black pipe should have a blue color bar.

5. Pipe fixed length: 6m, 12m, can also be determined according to user requirements and transportation conditions

Performance comparison of steel mesh skeleton plastic composite pipe and welded steel skeleton plastic composite pipe:

First: the production process of steel mesh skeleton plastic composite pipe and welded steel skeleton plastic composite pipe is different

1. Composite structure. The welded steel skeleton plastic composite pipe is based on ordinary carbon steel wire. Although the steel wire is relatively thick, the tensile strength is only 400Mpa, the process is complicated, and the product quality fluctuates greatly. Steel mesh skeleton plastic (composite pipe, high-strength steel wire (above 1950Mpa) is used as the base material, and the steel wire is wound on the pipe in a 54.7-degree oblique direction, so that the pipe can be axially and The force is uniformly distributed in the circumferential direction, and a high safety factor is adopted when determining the diameter and density of the steel wire.

2. Water channeling on the end face. Welded steel skeleton plastic composite pipe, due to the inevitable gap between the PE material pipe and the steel plate, when the pipe is cut, the end face is sealed, but the seal is easy to fall off when heated with electrofusion pipe fittings. After installation, the medium will enter the gap between the steel plate and the plastic, resulting in a decrease in the pressure bearing capacity of the entire pipeline system. As a result, the pipe will be damaged at low pressure, resulting in the failure of the pipe.

Second: the product standards of steel mesh skeleton plastic composite pipe and welded steel skeleton plastic composite pipe are different. The steel mesh skeleton plastic composite pipe implements CJ/T189-2007, and the steel skeleton composite pipe implements the CJ/T123-2004 standard;

Third: The steel skeleton composite pipe can be overhead, but the steel mesh composite pipe cannot be overhead.