Steps of Repairing in Service Pipe Leaks Using Epoxy Adhesives

How to repair in service pipe leakage with epoxy adhesives?

One of the biggest challenges in various industries is repairing leaks in online pipes and service lines. Since it is not possible to cut off the flow of these lines, leakage can be a very difficult and costly task. Epoxy adhesives, being a very strong adhesive, is a new and cost-effective method for repairing pipe leaks.

Video guide for repairing leaking pipes in service

Advantages of using epoxy adhesives for repairing in service pipe leaks

Natural factors like humidity, rain, and temperature changes can cause long-term damage to industrial facilities. Including liquid transmission lines in advanced industries such as oil, gas, petrochemical, water and sewage, which in case of leakage can be costly and full of risks.

Nowadays, epoxy adhesives are one of the best adhesive materials for repairing industrial equipment. In addition to repair, epoxy adhesive can protect industrial equipment in the long run due to its chemical and physical properties. For its extremely strong and excellent resistance to geological and environmental factors.

Epoxy adhesive is a safe and reliable choice for anyone working in the above mentioned industries or anyone planning to repair industrial equipment.

Megatite industrial adhesives for repairing leaking pipes in service

Before getting into the steps of repairing a pipe in service, it is better to get acquainted with the adhesives used for this purpose.

In general, we are faced with two modes of pipe repair;

    1. The pipe is in service
    2. The pipe or line is not in service

    In case the pipe is in service, in other words, if fluid is running inside a pipe or flow line, we would need two types of adhesive:

    1. Megatite UN Epoxy Adhesive (Instant Adhesive)

    For immediate and emergency cut-off of current in leaking pipes.

    1. Megatite PM epoxy adhesive (industrial adhesive)

    For permanent repair of pipe leaks.

    In order for us to repair a leak in an in-service pipe, we first need to instantly cut off the leakage current. Because without this, it will not be possible to repair. Therefore, to stop the leakage current we use Megatite UN adhesive, which is an instant adhesive typical for emergency repairs and hardens at 25°C within 10 minutes. Once the leaking current has stopped and the leak site has dried, we can easily use PM Megatite adhesive and repair the leak permanently.

    If the pipe or line is not in service, i.e. there is no current flowing in the pipe, the repair operation will be much easier. In this case, we are not facing an immediate situation. So you will not need the instant adhesive.

  1. The applications of Megatite epoxy adhesive in different industries

    • Crude oil transfer.
    • Transfer of corrosive liquids.
    • Transfer of drinking water.
    • Fire water lines.
    • Seawater cooling systems.
    • Industrial effluent.
    • Marine and offshore platforms

It is also used for taper/taper connections in fiberglass pipes and fittings in different transmission lines.

Key features in Megatite PM epoxy adhesive

  • Thermal resistance up to 212°F (100°C).
  • High chemical resistance towards most chemical materials.
  • Texotropic properties.
  • Room temperature curing.
  • Increasing properties after post curing.
  • Suitable for metals and fiberglass components i.e., GRVE, GRP, GRE.

Tools needed to repair pipes and lines in service

Required tools:

  • PM Megatite epoxy adhesive
  • Instant Megatite epoxy adhesive UN
  • Flat metal file
  • Miller
  • Sheet metal (15*15 cm)
  • 3 cm spatula
  • 15 cm spatula
  • Fiberglass band

Steps of repairing in-service pipe leak with epoxy adhesive

  1. First, use a flat metal file to flatten the area around the pipe.
  2. Make a sheet metal (15*15 cm) (this size can vary depending on the size of the leak) and bend it according to the diameter of the pipe. So that when you place the sheet on the pipe, the whole sheet sits on the surface of the pipe.
  3. Next, grind the inner surface of the sheet metal with a milling machine.
  4. Store Megatite epoxy adhesives at 25°C (room temperature) for 24 hours before use.
  5. Combine Megatite UN epoxy adhesive ingredients in a 1: 1 ratio (one part resin and one part hardener). This adhesive immediately reaches its initial cure in 5-6 minutes. Therefore, you should work fast; Otherwise, the adhesive will dry before use.
  6. apply the composite adhesive on the back of the sheet metal without wasting time. Then dry the leak with a napkin and quickly place the sheet on it and press firmly with both hands to stop the leak. Wait 5-6 minutes for the adhesive to dry.
  7. After the adhesive’s instant hardening, release your hands and remove the excess glue with a spatula.
  8. Using a milling machine, grind the leak area around the pipe and the surface on the sheet metal.
  9. Rinse the rubbed area with acetone. Then, with a distance of 25 cm from each ends of the leak, close the pipe with paper tape. So that the leak is in the middle of them.
  10. Cut a fiberglass band (20*100cm). The length and width of the fiberglass band can vary depending on the diameter of the pipe. What is important is that the width of the fiberglass band should be 5-6 cm wider than the width of the sheet metal, and its length should be twice the diameter of the pipe so that it can wrap around the pipe twice.
  11. Combine Megatite PM epoxy adhesive in a ratio of 1 to 4 (one part hardener and four parts resin).
  12. Apply the mixture of epoxy adhesive on the surface of the pipe with a 15 cm spatula. Cover a 2-3 mm thick layer of adhesive on the surface of the pipe. Note that the adhesive mortar should cover the perimeter of the pipe once and not go beyond the area between the two paper tapes.
  13. Place the fiberglass band on the epoxy adhesive and wrap it around the pipe and hold it at the junction.
  14. Re-apply the epoxy adhesive mortar on the fiberglass band and cover the entire surface. Wrap the rest of the fiberglass band on the pipe. The result should be such that the fiberglass band is wrapped around the pipe twice and epoxy glue is placed in between it.
  15. Once the fiberglass band has completely covered the surface of the pipe, re-layer the fiberglass band with epoxy adhesive mortar. So that a 2-3 mm layer of adhesive mortar covers the surface of the fiberglass bond.
  16. Finally, remove paper tapes and allow the epoxy adhesive to reach full strength for 24 hours.

Megatite is a manufacturer of two-component epoxy adhesives for various applications in the construction, petrochemical, oil, gas, power, water and wastewater industries.

In this article, we tried to acquaint you with all the steps of repairing in service pipe leakage. This content has been prepared by the Megatite content team. If you have any questions or criticisms about any of the content, you can leave a comment below.

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