PE 100 RC for a suspended drinking water pressure pipe

Zeichnung der Meeresquerung mittels PE 100 Rohr für die Trinkwasserdruckleitung und Ansicht der Verankerungsstellen auf dem Meerboden zwischen der Türkei und Zypern
Zeichnung der Meeresquerung mittels PE 100 Rohr und Ansicht der Verankerungsstellen auf dem Meerboden zwischen der Türkei und Zypern

Reinert-Ritz GmbH develops innov­ative products made of thermo­plastics. The result of this experience is molded parts that are not available on the market in these standard sizes. In addition to their size, these products continue to win over new customers worldwide with their quality and safety. With its many years of experience, seamless quality assurance and high production quality, Reinert-Ritz was also able to convince the planners of the drinking water pressure pipeline.

A floating d 1600 mm drinking water pressure pipeline at a depth of 150 m in the sea

The construction of an 80 km long pipe system through the waters of the Mediter­ranean set a new standard in water supply. The urgently needed water supply for Northern Cyprus comes from a reservoir near the Turkish coast. From there, the pipeline leads directly to the coast and then through the Mediter­ranean to the Turkish part of the island of Cyprus.

The solution: Floating PE 100 pipes held by steel cables

Reinert-Ritz GmbH from Nordhorn in Lower Saxony has been devel­oping innov­ative products made from thermo­plastics for over 40 years. The result of the experience gained is fittings that are not available on the market in these dimen­sions as standard. New customers around the world are constantly being convinced of the quality of these large-format products. With its many years of experience, seamless quality assurance and high production quality, Reinert-Ritz convinced the planners of this drinking water pressure pipeline of its capabil­ities and efficiency.

From granulate to semi-finished product

Before the raw material supplier unloads the 25 tons of PE granulate into the company’s silos, a sample is taken from the delivery and tested in the laboratory by the company’s own quality assurance staff. The granulate sample is tested according to strict guide­lines using estab­lished test methods. This seamless quality assurance is an integral part of the manufac­turing process at Reinert-Ritz GmbH. Only when the sample meets the company’s high standards may the granulate be processed further.

In the adjacent extrusion department, semi-finished products with diameters of up to 2850 mm and more are now produced from the granulate. Here, the granulate is fed directly into the extruder. The design is similar to a meat grinder. The granulate is fed in via a hopper and moved through a heating zone by a screw conveyor. The loose granules melt under the influence of friction, temper­ature and increasing pressure. The now plasti­cally deformable mass is pressed through a specially developed system to create a thick-walled semi-finished plastic product.

As soon as the very hot and uniformly malleable semi-finished product leaves the mold, it must be cooled. Directly connected to the machine is a cooling basin through which the heat is dissi­pated. At the end of the extrusion line, the dimen­sionally stable semi-finished product is cut to the length required by the customer. Quality assurance also monitors the semi-finished product, as Reinert-Ritz takes a sample of every hollow and solid bar produced. Like the starting material, the granulate, the semi-finished product samples are also tested for their properties in the laboratory.

Portal milling machine for drinking water pressure pipe in use 

After approval by quality control, the semi-finished product can be used in further processing steps to manufacture the finished product. In order to process the thick-walled semi-finished products into the desired finished products for customers, the family business has a large and modern machine park at its disposal. With the use of computer-controlled turning and milling machines, every­thing from small to very large semi-finished products can be processed efficiently and to the highest quality.

The special collars for the drinking water pressure pipe were produced using a special portal milling machine. It can be used to process semi-finished products up to a diameter of 2 m without any problems. Despite these dimen­sions, the milling machine works with a very high degree of accuracy. This dimen­sional accuracy is partic­u­larly important for the connecting parts used in this drinking water project, as the fittings are used in the transition from PE100 to the preformed steel elbows. Therefore, every component manufac­tured for this and other major projects must comply with the very tight toler­ances specified.

And for quality assurance, each one is provided with a clear and permanent label. The fittings are then tested and packed before being trans­ported to Turkey by truck.

To date, over 300 of these fittings have been manufac­tured and success­fully installed for the TRNC project. Every day, fittings are shipped from Nordhorn to over 40 countries around the world.