HENZE is one of the market-leading manufacturer of large diameter plastic pipes. The pipes, made out of Polyethylene or Polypropylene are used for applications in water- and sewage systems and as industrial application as well. The spiral wound pipes can be produced either with a solid or profiled wall as structured pipes.

Especially the double wall structures enables HENZE to provide a high quality and security standard for industrial applications and interesting solutions for process-engineering (double wall tanks, heat- exchanger etc.)

The following brief-report shows the special application of storage- and treatment tanks, made of Polypropylene, for a bitumen-emulsion in road constructing.

Ministry of works - Bahrain

Introduction:

Manholes made of Polyethylene have been used successfully for more than 40 years Worldwide. It is a growing market and the advantages of manholes made of thermoplastic materials are well known:

• No leakages
• Easy handling
• Low weight
• Durability > 50 years
• Impact resistance
• Flexibility
• High Strength
• Tailor-made design for any load case
• Easily Fabricated – important for future connections

In this case, the Ministry of Works – Bahrain had reservations concerning the possible flammability of the HDPE manholes during and after installation. These reservations had to be answered clearly and without any remaining doubt!

Polyolefin sewer pipe systems have a service lifetime expectancy of at least 100 years.' This is the conclusion of a recent two-year project commissioned by TEPPFA and independently scrutinised by Professor Heinz Dragaun from the Technical School for higher education (TGM) in Vienna. The project involved the excavation of many samples from in-service pipe networks that were tested and assessed under meticulous laboratory conditions. The results of the analysis and findings of this work are expected to favourably influence those sewer operators faced with major capital investment in new or replacement networks.

All that emerges from the ground is a yellow tube, but it is no ordinary plastic pipe. It can withstand NATOcalibre shelling and hold up to 12 people in temperatures ranging from -50 ˚C to +80˚C.

Dubbed the Sub Safe U1, the Estonian-built bomb shelter is made of plastic to render it both portable and waterproof. A fact which Terramil, the company that manufactures it, says makes it unique in the world and it can be assembled in a rush.

The shelter is about six meters long and weighs around two tons. Terramil representatives note that it can be installed using a simple digger. The company says if it is placed up to 50 metres underground it could even withstand a nuclear attack, although that has yet to be proved.

The unit has been tested by the University of Tartu as well as by US NATO forces currently on a training mission to the country.

“We have tested it now against a range of different weapons and as you can see there is no damage here,” noted Kirtsi. “We have measuring equipment inside here to measure the pressure, vibration, sound levels, everything like this that can be dangerous for people inside. And again we have had no damage to the shelter so far.”

The units can even be connected together to create an underground city, but the room without a view comes with a price tag of 18,000 euros for a simple 12 bunk model.

Saudi Arabia, Pakistan, India and Egypt have already expressed interest in buying the modules.