Pigs for Pipeline Cleaning

Description

Description
Pipe Pig is pushed by gas, liquid, or pipeline conveying medium. And it is a special tool for cleaning pipes. Pipe Pig can carry a radio transmitter and ground tracking instrument. They may together constitute an electronic tracking system. Therefore, this product is a very practical device. So if you want to know more about Pipe Pig please contact our professionals to answer them for you.

Purpose of Pipe Pig:
Pipe Pig
The transmission efficiency and service life of gas transmission pipelines are very important. They largely depend on the cleanliness of the inner wall and interior of the pipeline. Substances are harmful to gas quality and pipeline. Such as condensate, water, sulfur, mechanical impurities, etc. After they enter the gas transmission pipeline, they will cause corrosion of the inner wall of the pipeline and increase the roughness of the pipe wall. The accumulation of a large amount of water and corrosion products will also locally block and reduce the flow section of the pipeline. During the construction process, the atmospheric environment will also rust the uncoated pipeline.

It is inevitable that some welding slag, soil, stones, and other harmful objects will be left in the pipeline. After the pressure test of the pipeline water, it is difficult to drain all the water simply by using the opening of the pipeline height difference. To solve the above problems. Therefore, it is very necessary for us to clean the inside and inner walls of the pipeline. Therefore, the pigging process has always been an important process measure for pipeline construction and production management.

The purpose of Pipe Pig can be summarized in the following four aspects:

(1) Remove the accumulated liquid and sundries (dust) in the pipe. Reducing friction loss. Thereby improving the conveying efficiency of the pipeline.
(2) Avoid ponding in low-lying areas. (the back-and-forth fluctuation of water not only accelerates electrochemical corrosion due to the presence of electrolyte but also produces mechanical scouring, which makes the pipe wall thinner and causes corrosion cracking);
(3) Remove the deposits and corrosion products from the pipe wall. Which makes it free of additional corrosion electrodes. Reduce corrosion under scale;
(4) Many new applications such as in pipe inspection.

Many new applications
① Sizing. It cooperates with the pig detection and positioning instrument. We find out that the pipe diameter deviation larger than the design, construction, or production regulations;

② Diameter measurement, thickness measurement, and leakage detection. It is integrated with measuring instruments or serves as a traction tool for these instruments. They detect and record the condition of the pipeline through the inside of the pipeline;

③ Filling and conveying pressure test water: when filling the pipeline with pressure test water. To avoid leaving bubbles at the high point of the pipeline. Affecting the stability of the test pressure. It sends a pig in front of the water column to remove the air in the pipe;

④ Separate the medium in the pipe. Replace the air and pressure test water in the pipe with natural gas. Or replace the natural gas in the pipe with air. We use a pig to separate the two media. As this prevents the formation of explosive mixtures. The emission loss of combustible gas can be reduced. Improve work efficiency;

⑤ Apply corrosion inhibitor and an epoxy resin coating on the inner wall of the pipeline. The liquid corrosion inhibitor can be pushed by one pig or entrained by two pigs. We painted the inner wall of the pipeline during the operation along the line. The internal coating construction of epoxy resin is relatively complex. Including cleaning of the inner wall of the pipeline, chemical treatment, epoxy resin coating, control and inspection of coating quality, etc. These processes are all realized by special pigs.

Cycle: According to the conveying medium of the pipeline, the conveying efficiency and pressure difference of the pipeline shall be considered. We can determine a reasonable pigging cycle