Our first and foremost commitment is total quality assurance, and a substantial portion of our efforts is aimed in this direction. The mechanical equipment used for the manufacture of Como-pex pipes assures quality of products at the utmost degree. Apart from the usual mechanical equipment for pipe manufacture, Interplast production lines are equipped with the equipment listed below, ensuring that the consumer receives a final product of the highest quality.

• Raw material dehumidifier. In this way the raw materials that easily absorb humidity are stabilized. Thus, we eliminate the problem of altered dimensions, which is a quite frequent phenomenon in plastic pipes.

• Additives mixed by aid of a gravimeter. In this way we can achieve a materials mix divergence in the order of +0.01%. In raw materials such as Pex it is very important to have an accurate cross-linking additive proportion. If the proportion is not absolutely accurate the pipe loses strength or becomes hard during manipulation by the plumbing-heating technician.

• Automatic correction of screw turns. Thus we achieve steady weight per meter in the manufactured pipe, which means steady dimensions. This is the first part of the dimensional stability of the pipe.

• Automatic correction of pipe wall thickness. A system where we define the desired limits of wall thickness which are then regulated automatically by means of the extruder. This is the second part of the dimensional stability of the pipe and results in a proper fit of the nozzle of the brass fitting to the pipe.

• Checking of outer diameter by laser. This is the third and final part of electronic testing. The absolute values of the LASER SCANNER ensure proper fitting of the nut to the plastic pipe.

In addition to all the above which are a prerequisite for plumbing and heating pipe production, the following aspects ensure the high quality of Como-pex pipes.

• First-rate mechanical equipment specially designed for Pex pipes, in order to prevent undesirable pre-crosslinking and failure in homogenization.

• Fitting test with brass fitting after the production of each coil. In this way we guarantee proper fit between two components of our own manufacture.

• Dimensional checking of each coil by the production line operator. The outer diameter is checked by means of a strap gauge, wall thickness and oval of pipe by means of an electronic thickness gauge.

• Measurements and fitting tests performed by foreman on an hourly basis. The specimens measured are kept for final checking by the production manager and the technical director, who issue the distribution order after completion of laboratory testing. All measurements are registered in the ISO quality assurance system, which is updated daily.