AMEX©-10 seals have been used for pipe joint repair in water and gas utility pipelines, in power generation and in process industries in the UK for over 30 years.

With WRAS Approval and a 50 year life expectancy, the ‘no dig’ AMEX©-10 is a cost effective repair solution.

pipeline leakage repair diagram

How it works

1. Surface preparation


The area around the leaking joint is cleaned to remove dirt and corrosion. Any high spots are removed to provide a smooth surface for the rubber to seat.

2. Applying the backing band


In pressurised pipelines, a polypropylene backing band is applied to the prepared joint to protect the rubber seal from compression damage from pipe joint edges.

3. Applying the seal


The one piece ‘made to measure’ EPDM or NBR seal is positioned over the backing band and held in place.

4. Applying the rings


The first stainless steel retaining ring is loosely fit into position and the second ring is fit into place ready for expansion.

5. Expanding the rings


With the seal in place the rings are hydraulically expanded.

6. Seating


To speed up the natural seating process, the seal is beaten with a nylon mallet around its circumference. The vibrations even out the pressure of the ring on the seal to improve the overall performance and fit of the seal.

7. Fitting the wedges


Whilst the rings are held open under hydraulic pressure, they are secured in place with stainless steel retaining wedges.

8. Pressure testing


With the AMEX©-10 seal secured in place over the leaking joint, the seal is pressure tested to ensure its integrity. This is done by inflating the seal using the test nipple. After inflation a soap test is applied. For most pipelines the AMEX©-10 seal is re-expanded after 12 hours.