Pig Signaller Flag Flange

Description

EMT Pig signaller is used to provide confirmation of the movement of pipeline pigs through a pipeline. Then they are normally positioned at the pig launching and receiving stations and key points along a pipeline.

Features:

1. Firstly, suitable for pipes above 2″.
2. When flanged, the design pressure is from ANSI 150# to 2500#. Then the maximum design pressure when the nozzle is welded is as high as 10000Psi (69MPa).
3. The working temperature range is -20℃~120℃. When the working temperature exceeds this range, special seals are used.
4. Then the trigger mechanism does not use a dynamic seal. Which prevents leakage and ensures the flexibility of triggering. (Except for the low-cost nozzle connected to the pop-up ball indicator and digital display ball indicator).
5. Simple installation, little maintenance, also strong durability (proven by ten years).
6. At last, insertion depth can be customized according to customer needs.

The flange-connected flag-type mechanical ball-through indicator is composed of a mechanical contact body and a flag indicator head. It has the characteristics of intuitive indication, automatic reset of the mechanical part, and manual reset of the display part. The indicator can be displayed normally when the pipeline passes through the pig in the forward and reverse directions. So it can be positioned on the pipeline, and the passage of the pig in the pipeline can be transmitted through the mechanical structure to provide the operator with information and guide the process flow conversion.

Firstly, the basic structure of the Pig Signaller:

The basic structure is as follows. Then the indicator is mainly composed of a mechanical contact body and a flag indicator head:

Firstly, probe: rotate in both directions in the axial direction.

Secondly, the lower flange: is made of carbon steel, alloy steel, or stainless steel with good welding performance.

Thirdly, bolts and nuts

Fourthly, the upper flange

Then the stylus can make the mechanical indicator stand up

Also raising flags

Travel switch, with signal remote transmission function, if necessary, please specify when ordering

And then O-ring

Protective cap

At last, fixing screws

Flange connection flag-type pass ball indicator

Secondly, the technical characteristics of the mechanical transmission part of the Pig Signaller:

1. Firstly, design pressure: according to work needs.

2. Then Operating temperature: -40-100℃.

3. The diameter of the installation pipeline is greater than or equal to 89

4. Transmission medium: oil, water, natural gas, also other non-corrosive fluids.

5. Pipeline material: A: All kinds of metals with good welding performance of steel. B: Stainless steel material for special environmental requirements.

6. The length of the probe extending into the tube is ≥15mm.

7. When the pipeline passes through the pig in the forward and reverses directions, the indicator can be displayed normally.

8. Then it is suitable for installation in explosion-proof places.

9. The mechanical part adopts a mechanical transmission mechanism. When the probe swings more than 45 degrees, the sign changes from horizontal (the arrow points horizontally) to vertical (the arrow points up). So this shows that the pig has passed the indicator installation position.

10. At last, flange standards and pressure levels are based on user requirements.

Long-distance oil and gas pipelines have the characteristics of high safety and low energy consumption. It also has the advantages of large conveying capacity, low cost, and good economic benefits. Therefore it is the best means of transporting oil and gas products. However, oil and gas pipelines are in service. Due to factors such as corrosion, wear, and accidental damage. So this will inevitably lead to local thinning, damage, and even leakage of the pipeline.

A large number of leaked flammable, explosive, and toxic media can easily cause accidents such as combustion, explosion, and poisoning. Because this caused huge economic losses and serious casualties. Therefore, we must pay special attention to the prevention and control of oil and gas leakage. This also requires the operator to take a series of effective countermeasures. Therefore, it is very necessary to use supporting equipment such as pigs. Only in this way can people’s personal and property safety be guaranteed.

1. The hazards of oil and gas pipeline leakage

Natural gas consists of a variety of combustible gases. Among them, methane accounts for more than 90%. Natural gas is a clean and efficient energy source. But it is poisonous and flammable and explosive. If a large amount of natural gas is accidentally leaked into the air. Then there may be serious harm. Such as casualties, environmental pollution, burning, and explosions.

When oil leaks from a pipeline or storage tank. The flammable gas in it will evaporate into the air to form petroleum gas. The composition of LPG is not fundamentally different from that of natural gas. It’s just that they have less low molecular gas components such as methane. Therefore, the hazards of LPG are similar to those of natural gas. Once oil and gas leak, not only fire, explosion, and poisoning accidents may occur. It will also cause major environmental pollution such as air, land and water sources. Therefore, special attention must be paid to preventing and controlling oil and gas leakage.

2. Analysis of corrosion problems of oil and gas gathering and transportation pipelines

Oil and gas gathering and transportation pipelines are in use. It is affected by the external environment as well as the internal transport of substances. Because this can cause serious corrosion problems. And this affects the actual application effect of gathering and transportation pipelines. So it can cause problems like leaks in pipes. In the current application process of oil and gas gathering and transportation pipelines. We also need to do a good job of comprehensive treatment of the corrosion problem of gathering and transportation pipelines.

The following is an analysis of the main factors affecting the corrosion problem of oil and gas pipelines.

Firstly, the oil and gas gathering and transportation pipelines are in the process of use. It is affected by the external environment. cause serious corrosion problems. For example, oil and gas technology pipelines are buried underground. Its underground soil contains groundwater or acidic liquid. This is likely to cause a corrosive effect on the extension of the pipeline. It will also affect the actual use of the pipeline.

Secondly, the oil and gas gathering and transportation pipelines are in the actual use process. It is affected by the internal factors of the pipeline. At the same time, this creates a problem of corrosion in the pipeline. In the actual pipeline corrosion problems affect the process. Mainly due to the impact of the transported substances in pipeline transportation. These include hydrogen sulfide, sulfur dioxide, and other gases. Hydrogen sulfide gas and sulfur dioxide gas easily react with pipeline metal substances. Because all this has serious effects on the pipe metal. And then it affects the actual pipe metal substance.

This is not conducive to the application of pipelines. Therefore, in the actual application of oil and gas gathering and transportation pipelines. We also need to carry out the necessary anti-corrosion treatment. This not only improves the application effect of the pipeline. And it also ensures a more rational pipeline application.

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