Non-welding connection construction method for PE natural gas pipes

Abstract

The invention discloses a non-welding connection construction method for PE natural gas pipes, and relates to a pipeline connection method. The non-welding connection construction method for the PE natural gas pipes realizes convenient installation and has high construction efficiency. The non-welding connection construction method for the PE natural gas pipes comprises the following steps that section cleaning and chamfering are conducted on two sections of PE natural gas pipes needing to be connected; an external pressing piece and a sealing supporting piece are installed in a butt joint mode, wherein the external pressing piece is located outside the sealing supporting piece, and the inner diameter of the external pressing piece is slightly smaller than the outer diameter of the PE natural gas pipes; the two sections of PE natural gas pipes are soaked in hot water to be softened; water drops on the surfaces of the two sections of PE natural gas pipes are wiped off; and the sealing supporting piece is aligned to the inner surfaces of the two sections of PE natural gas pipes, the external pressing piece is aligned to the outer surfaces of the two sections of PE natural gas pipes, and the PE natural gas pipes are pushed to a preset position to be extruded between the external pressing piece and the sealing supporting piece.

Description

technical field [0001] The invention relates to the technical field of pipeline connection, in particular to a non-welded connection construction method for PE natural gas pipes. Background technique [0002] PE pipe has many excellent characteristics, such as low temperature resistance, good toughness, high strength, etc., and has been well used in the natural gas industry. PE natural gas pipelines show their talents in some special-purpose occasions, because in these fields, PE natural gas pipelines have great advantages compared with traditional metal material pipelines, such as low cost of pipelines, pipelines can easily achieve large slopes, and pipelines can achieve It can turn at any angle, and it can also ensure the safe use of pipelines. Such as steel pipes, cast iron pipes, and natural gas pipelines, the biggest problem is the common occurrence of pipe corrosion and joint leakage during the service period. PE natural gas pipelines have obvious advantages, perfect...

AI Technical Summary

Problems solved by technology

[0015] 1. It needs special thermal welding equipment or electromelting equipment to operate;

[0016] 2. The operation process and welding technology are complex, requiring high technical proficiency of the operators, and special training is required to work on the job. If there is a slight error, the joint must be sawed off, the joint must be re-milled and the welding operation must be performed again;

[0017] 3. The operation site needs to be connected to a stable municipal power supply;

[0018] 4. The operation speed is slow, it takes about 25-50 minutes to weld a joint, and the operation efficiency is low;

[0019] 5. The operation method cannot be operated in winter and windy weather;

[0020] 6. After the welding is completed, the pipe is found to be twisted or knotted, so the pipe can only be sawed and re-welded

Images