Skip to main content


Search the whole content of the site. The search results will contain; Product pages, Downloads, Links etc.


Search for the products of the Interplast


Search Technical Guides and assets


Search pages and site content.

Laboratory Testing

The stringent specifications followed by Interplast in pipe and fitting production are certified in its labs with tests specified by European standard EN ISO 15874-1/2/3, German DIN 8077/78 and 16962.

Before pipes are distributed in the market they are subjected to the following quality testing:

This is a fixed test that is carried out each time raw materials are received. The flow of the raw materials is very important in defining the temperature profile of the EXTRUDER and thus homogenization of the material. The pipe melt flow is then checked, where the small divergence from the raw material certifies the perfect processing of the material.

These are checks that certify ongoing measurements carried out throughout production.

The products are tested as a system in extreme operating conditions for 5000 hours. The water temperature varies Per 15 minutes between 20 ° C and 95 ° C (thermal shock cycles), while the hydraulic pressure is continuously at 6 bar.

Specimens from each production lot remain in the laboratory furnace at 135oC for 2hours The results should not exceed 2% in compliance with DIN and EN ISO. The Aqua-plus pipes have values of the order 0.4% and the tubes Aqua-plus-Aluminum and Aqua-plus-Fiberglass values of 0.2%. This translates to very small coefficients of thermal linear expansion during operation in heating.

This is one of the most important checks and in conjunction with raw material flow it defines the temperature profile and its processability. Aqua-plus pipes display the best possible homogenization, ensuring their long lifespan.

By use of a thermal cyclic tester, a test is performed in a special simulator of an actual plumbing installation, which is one of the few used in industrial laboratories of Europe. Hydraulic pressure is applied to a network of Aqua-Plus pipes and fittings, while the water temperature is alternated every 15 minutes between 20oC and 95oC (thermal shock cycle). After the completion of 5000 cycles, all the above tests are performed again, in order to determine any deviation of mechanical and physical-chemical properties of pipes and fittings from their original ones (determination of resilience to ageing).

and the fittings in the internal hydrostatic pressure in a test time of 1 hour at 20 °C and 95 °C, 22, 165, 1000 hours at 95 °C and 8760 hours at 110 °C, as specified by the European standards, German and Spanish standards. The tests performed one hour per batch of finished product of 22 and 165 hours every two weeks and 1000 hours and 8760 hours one time per year for each section and type of pipe.

According to the requirements of DIN 8078, DIN 53453, EN ISO 15874-2 και ISO 9854-1/2, which describe at the test mode. PP-R pipes should respond without breakage to temperatures of 0oC and they should be tested with the method of the 15-Joule pendulum hammer. In its effort to improve the characteristics of its products, Interplast tests Aqua-plus pipes at –7oC with a 25-Joule hammer blow, which exceeds the requirement of the standards by 66%.


To find technical manuals, promotional materials, certifications and warranties, visit the Downloads page


Brass products Factory
Kefalovrisou 23, 13 677 st. Monopati, Acharnai, Athens, Greece
Plastic factory
Industrial area of Komotini, 69100 Komotini, Greece
Offices / Exhibition
El. Venizlou 9B, 57 001 Thermi Thessaloniki, Greece