The Incorporated joint, is anchored to concrete in the plug-in zone as the tube is undergoing the manufacturing process. The joints are manufactured to fit in the annular space between the tubes, being its position secured in the anchorage points.
In this joint two different parts can be distinguished: the first section (wedge shaped) supports the watertightnes function and the second one is used on the tube manufacturing process.

The incorporated joint is mounted on the previously cleaned base hoop. As this process is being undergone, the joint is fixed to the hoop, 35º gradient, testing the right emplacement of the upper and lower sealing lips. The tube mould is filled with concrete.

In order to get the right precision, the base hoop must not be removed till the concrete get harden (under normal circumstances, the day after)

Then, the moulding joint is removed. It can be used from 30 to 50 times.

Joints are manufactured taking into account the reaction force over the tube under different temperature conditions, avoiding in this way cracking and breakage.

The male and female coupling zones must be clean and the male ending must be greased with the right lubricant (specially in the curved zone). The male ending is centred on the female and then is pushed, with a minimum force power insertion of 2,5 X tube weight (under normal conditions)

The installation process must be done under the ISO UNE-EN 1610.