Introduction

Because of the long distance pipeline’s long-term uninterrupted operation, the pipe wall will accumulate a lot of impurities. Therefore, the flow rate decreases and serious situations can lead to rust and even blockage. Therefore, regular inspection and cleaning of pipelines is very necessary. During the cleaning, an EMT Cleaning Pig is necessary.

Pipe cleaning is done by a pig. A pig (also called pipe pig) is a special tool used to clean the pipe driven by gas, liquid or pipeline transport medium (oil, natural gas liquid). They can remove crude oil and debris inside the pipeline in operation. The product can also reduce the corrosion damage to the inner wall of the pipeline. Besides, it can redefine the pipeline direction and detect pipeline deformation. Check the integrity rate of valves along the line and reduce the working back pressure are also okay.

The Origin of Its Name

The pipe pig moves slowly in the pipe, arching inside like a pig, and will not look back. Another reason is that when it works, it makes a harsh and unpleasant sound, similar to the howl of a Pig, so it is named Pig, which is still used today.

Disc EMT Cleaning Pig

The lower the temperature of the crude oil, the easier it is to deposit wax, and the most common straight plate pipe pig can remove deposited wax from the pipe wall. Wax, oil, water, gas, and other impurities can form stable inclusion bodies in the pipe wall, which will affect the safety and reliability of the service life of the pipeline. Cleaning the oil pipeline should also consider the characteristics of the pipeline material, the operating temperature, and the working pressure. Some pipelines use alloy steel, so removing wax and dirt requires a slightly different cleaning method. Combine it with other techniques to achieve the best cleaning effect.

Foam EMT Cleaning Pig

the raw materials in foaming: polyether foam (sponge), polyester foam (high-density foam ball), tetrahydrofuran foam, etc., the commonly used pipeline is polyether foam (sponge), and polyester foam.

A sponge generally consists of a high-density foam system of polyurethane into a cannonball shape. Also saying an elastic Pig. The surface of this pig has a high strength. A polyurethane elastomer with good wear resistance and flexibility and excellent solubility. Sometimes a wire brush or steel needle is attached to the surface of this elastomer. The one with a wire brush attached is called a wire brush Pig. The one covering a special shape of steel needle is a nail Pig. These two are suitable for removing dirt that is firmly sticking on the pipe wall.

If a soft Pig is formed by low density polyurethane foaming system, it has the characteristics of good shrinkage. It is suitable for the early clearing and cleaning treatment, and is use to check whether there is foreign matter in the pipeline. Moreover, it can also use its good hygroscopic characteristics to specifically remove moisture and oil in new pipelines. It is also useful in removing sludge and soft dirt from pipes.

Different Types of Foam Pig and Their Different Usages

The high hardness pig made of high density polyurethane foaming system is more suitable for the operation of rust removal and sludge removal of long distance pipelines. The Pig with a steel needle or wire brush on the outside can be use to remove calcic scale with great hardness and clogging scale in the heating furnace. Therefore, this kind of pig is usually useful in the basic treatment of pipeline lining.

There is also a Pig that consists of polyurethane resin in one piece. So it has the characteristics of good sealing. It is suitable for cleaning before transporting several different fluids in the same pipe in batches and separately.

Spherical Pig(English name Sphere pig) Because it is spherical, it can walk freely in a bend with a small radius of curvature. So it can pass through any complex shape of pipe. It has long been used to plug pipes. The spherical Pig is made of double scale with a soft outer surface and hard inner core, which is suitable for the treatment of the inner lining of the pipeline.

In practical applications, there are a variety of pig structures, such as disc pig，Cup pig disc brash pig. Their structure and performance are much the same as the Pig introduced earlier