Polyurethane Pig

Polyurethane pig has extremely high tensile strength and tear strength, high strength and tear resistance.


Polyurethane pig is the best material for this product because of its excellent comprehensive properties. Every day with a large number of oil exploitation, the development of petrochemical, urban water supply, natural gas transmission industry, pipeline descaling, wax removal, and new pipeline coating anti-corrosion equipment demand is increasing, pipeline cleaning quality requirements are becoming higher, and higher, especially in order to reduce the investment in the middle link, must be lengthened pipeline cleaning length. In order to solve these problems, the pig bowl followed the original material – a black rubber bowl, which could not meet the needs of production. To this end, a topic is put forward. We should find a kind of material with high hardness, good elasticity, good sealing performance, and good wear resistance to make the pig bowl.


Polyurethane pigging appliance has the following characteristics:

High hardness and good elasticity!

Polyurethane rubber still has good elasticity under high hardness conditions.

Clean the pipe thoroughly with a polyurethane rubber bowl, so as to ensure the effective output and output performance of the pipe.

High strength and tear resistance

Polyurethane rubber pigging equipment has extremely high tensile strength and tear strength, so it is the best material to remove the welding tumor of the new pipeline without fear of scratches.

Oil and solvent resistance

The bowl is resistant to oil and solvent, so it can be used as a new pipeline coating anti-corrosive material.

Long life

The leather bowl’s wear resistance and long life, are especially suitable for working in oil and water conditions. Can clean more than 80m pipeline at one time. Because the cleaning pipeline is long, it can reduce the intermediate link, so it can save a lot of investment.

Good sealing

The bowl of water, oil, and other liquids absorption is very poor, good sealing, so in the pipeline cleaning water pressure test before degassing and water pressure test after the effect is good.


The advantages of the scrubbing method

1. Scrubbing can make the inner wall of the tube get a cleaner surface than washing, especially can be retained in the tube to remove the solid impurities

2. Scrubbing saves water more than scouring. In the larger flow rate to flush out the solid particle impurities, in the smaller flow rate to promote the scrub swab forward can be taken out of the tube;

3. Scrubbing is not only suitable for the cleaning of the newly applied pipe before use, but it is also suitable for the use of the old pipe, in order to remove the corroded impurities in the pipe and improve the water capacity.


Precautions when scrubbing

Different diameters and pipes should be scrubbed with different sizes and hardness.

There shall be no obstacles in the pipeline, such as butterfly valves;

During the scrubbing operation, the branch pipe connected to the scrubbed pipe must be closed;

A scrubbing pipe should not be too long, not more than 1km is appropriate, to prevent excessive accumulation of debris before scrubbing the swab! Difficulty in moving;

When scrubbing, the start time of scrubbing should be recorded, and the time to be estimated, so as to estimate the obstruction position when necessary.



The role of the pig

1. Pigging will load the pig into the pipeline through the ball barrel, and move along the direction of pipeline transportation under the driving effect of the conveying medium in the pipe, so as to achieve the goal of pigging. As pig technology continues to evolve, the goal of pigging has expanded beyond the removal of sediment that clogs the pipeline or reduces the efficiency of the pipeline, to applications at various stages of the pipeline’s service life for many different objectives, such as in-line isolation, defect monitoring, dehydration, and drying.

2. In the process of pipeline construction, it is first used to clean the residue in the pipeline, such as welding rod, welding slag, plastic, stone, soil, sand, and other solid debris, in order to prevent damage to the downstream filter and valve and other pipeline equipment; Secondly, the ovality of the pipeline and the roughness of the inner surface of the pipeline is measured by the caliper pig before production, which can be used as the primary data for pipeline integrity management. Thirdly, in the trial operation process, after the pipeline pressure test, the pig is used to sweep the drainage line and remove the residual water in the pipeline to prevent corrosion of the pipeline in the process of transportation Producing hydrate in the pipeline; In addition, pigs can be used to isolate different transport media during production. In the pipeline operation service process, the main objectives of pigging have two aspects: one is to remove corrosion products and water in the pipeline, remove liquid hydrocarbons in the gas pipeline, and wax and sink in the oil pipeline. Accumulation, etc. Second, it is used for online intelligent monitoring of pipelines to collect information in pipelines.

3. Pigs are designed for different pigging purposes, so there are a wide variety of pig types that are suitable for different conditions. Even if the purpose of pigging is the same, because of the differences in pipe diameter, elbow, and other equipment and operating conditions of the pipeline system, as well as the differences in the property and amount of dirt in the pipeline, more specific requirements on the pig are also needed to achieve the best effect. Therefore, the rational selection of pig is a multi-objective (safe, effective, and economical), multi-factor (pig target, pipeline system characteristics, medium properties, pig performance, etc.) decision problem



Polyurethane pig



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