Main Methods of Gas Pipeline Insulation

For efficient operation, trunk pipes need reliable insulation. Whether it is a pipeline for natural gas, hot or cold water, or fuel, temperature stability is crucial. The insulation of the gas pipeline provides better control of the process by maintaining an optimal temperature inside. It helps to improve work efficiency and reduce energy loss, which in turn reduces operating costs.

As natural gas moves through a gas pipeline, its pressure and temperature change due to friction, changes in altitude, acceleration, and heat transfer to or from the environment. Due to changes in pressure and temperature, liquid and solids (hydrate) can also form in the line, which in turn affects the pressure profile. It can prevent the pipeline from operating at its intended or maximum pressure, which can lead to accidents or breakdowns. According to the expert Gas line repair near me, the insulation coating prevents heat loss and temperature fluctuations. It prevents fluid from forming inside the pipeline, thus maintaining an optimal pressure profile.

What’s it?

When insulating a steel gas pipeline, a layer of mastic or special tapes is applied to the outer surface of the pipes to protect the metal from impact. The process takes place in the factory, at the stage of production of structures, or during operation — for example, as part of scheduled repairs.

Why is this necessary?

• Condensation control.
• When the temperature is not maintained, condensation forms in the pipes and water accumulates over time. Proper insulation with the appropriate cladding minimizes the chance of condensation.
• Corrosion protection.
• Over time, the metal corrodes, but special coatings slow down this process.
• Noise management.
• During operation, the pipes can create vibrations and even knock. If they are properly isolated, excessive operational sounds are minimized.
• Security.
• When the temperature rises, there is a risk of accidents, and the protective layer minimizes the risks by keeping the temperature within the acceptable range.
• Reduction of costs associated with fuel losses.
• With high-quality insulation, there is practically no energy loss.

How is it carried out?

Pipe insulation is carried out at the factory when new structures are produced, but if necessary, after installation: to eliminate damage or as part of a major overhaul. The type, thickness, and other characteristics of the material are selected based on the surrounding conditions & the type of installation of communications (underground, above-ground). More often, bituminous mastics and polymers are used to protect gas pipelines.

In the case of insulation in the field, access to some sections of pipes (for example, when insulating an underground gas pipeline) may be limited, so the work is carried out with the help of special automated devices. In rare cases, the manual method is used: for example, to work with small areas and joints.

Preparation of the pipe for insulation includes:

1. Cleaning the surface from corrosion and contamination. For this purpose, pipe-cleaning equipment and special tools are used.
2. Gas pipeline priming. A thin layer of primer (about 0.1 mm) is applied to the pipes, then they wait for it to harden completely.
3. Application of an insulating layer. For effective insulation, hot bituminous mastic is used, which is applied in several layers: their number depends on the requirements of the system.
4. Wrapping with film. The pipe, covered with insulation material, is tightly wrapped with a film, and carefully watched to ensure that there are no wrinkles on the surface.
5. Measurement of coating indicators: density, thickness, etc. For this purpose, measuring devices are used: flaw detectors, and thickness gauges.

Materials Used

The choice of material for pipe insulation determines the operating conditions and the method of installation of the gas pipeline. For example, to protect above-ground systems, the surface is primed twice, and then painted with enamel or paint in several layers. When laid in seawater, they provide enhanced protection: the main insulating layer is covered with concrete.

Two types of coatings are used to protect underground pipelines: polymers and bituminous mastics. The most reliable and versatile type of polymer for the insulation of gas pipelines is extruded polyethylene. Features:

• ease of application;
• suitable for pipes with a diameter of 5.7 to 14.20 cm, a length of up to 12.4 m;
• forms a strong, uniform coating, adheres tightly to metal;
• Provides reliable protection against low/high temperatures & mechanical loads

There are also polyvinyl chloride adhesive tapes, but polyethylene tapes create better protection and tighter adhesion. They are often used in the repair of existing gas pipelines less often the pipes are wrapped with polyethylene tapes in the factory.

The Gas line repair near me experts say, install the pipeline & also remember to inquiry the condition within a specific time interval. For more information, visit us: — https://aquamechanic.com/

Email — info@aquamechanic.com

Call — (786) 732–7707 / (786) 210–8072