Structured Pipe System
DN/ID 300 – 4000 mm with integrated electro fusion
Water is of vital importance: Without water no lifewould exist and our planet would be a huge desert. Plants, animals and humans consist to 50-80% of water. From polluted water or water scarcity however,they suffer, fall ill or even die. Therefore, our common future is endangered when water is not available in sufficient amount and quality. Water is a heritage of nature and it belongs to all living beings. The right of access to sufficient and clean water is a universal law and it is therefore anchored in important international treaties. The uneven distribution of rain and water on earth leads to water scarcity in many regions. Today, 1 billion people (20% of the world population) have no secure access to clean drinking water and 2 billion people do not dispose or have access to sanitary installations. Thousands of children die every year due to polluted water. Moreover, global climate changes will intensify the water crisis.
All these facts force the world population to react in order to rescue our home planet. To improve this situation and to find solutions, a lot of governmental bodies, engineering and construction companies as well as pipe manufacturers have focused on this world threatening issue. However, for years tremendous difficulties were observed when selecting the material of construction for infrastructure systems which should be suitable to provide anticipated permanent solutions. Over the last decades, the inherent weaknesses of concrete, clay, ductile, PVC and steel caused tremendous problems in existing sewer pipe systems, as they tend to be brittle or are too sensitive for aggressive chemicals and soil conditions. Failures have become a common occurrence worldwide in sewer and other large-diameter-pipe applications. In addition, they have an unprofitable relationship between cost and benefit.
So Krah derived benefit from the fact that the processing of polyolefines is very easy and the plastic materials provide superior properties against adverse effects of the ambient and the chemicals. In addition to the permanent solution that lasts through generations, the Krah piping system is able to provide everlasting and economic solutions in wideranging fields of applications, as for example drain, storm drain and sewer systems and sea outfalls, manholes and reservoirs. In order to meet the requirements of the infrastructure systems, Krah has developed the most robust and advantageous largebore pipe systems of which all features are described in detail in this brochure.
Production technology at its highest level
The Krah Pipes GmbH is a German machine manufacturer with over 40 years of experience in the design, development and construction of production plants for large diameter pipes. The machine is equipped with all necessary components to produce pipes and fittings with all different kinds of sizes and stiffnesses as well as the profiles mentioned on the following pages. Even the complete range of diameters can be produced with one machine by using the production tools in the required diameters.
Basically Krah pipes are produced in an extrusion process, where a profile is wound around a collapsible steel mandrel. The pipe wall can be a solid wall or a structured wall.
Besides the extensive pipe range that can be produced, the main features of the machine are a high production output, the simple operation and short change-over times.
Thanks to very close cooperation and a steady information flow with our customers worldwide, we are always up-to-date regarding upcoming demands and changes on the pipe market. This gives us the possibility to develop necessary modifications to our machines in order to respond to the needs of our customers. In order to meet the requirements of the infrastructure systems, Krah has developed the most robust and advantageous large bore-pipe systems of which all features are described in detail in this brochure.
Material
Polyethylene (PE80 and PE100) and polypropylene are thermoplastics with excellent properties for the application of water and sewer, as well as for the fabrication of containers for liquids and solid materials. The environmental – friendly polyethylene and polypropylene are resistant to many chemicals and are very suitable for conveying and storing various liquids. Krah pipes can be produced from the following
thermoplastic materials:
• High density polyethylene (PE80 and PE100)
• Polypropylene-random (PP-R, PP-B)
• Polypropylene-homo (PP-H)
• Flame retardant polypropylene (PP-S)
These materials feature the properties mentioned in the right table. Other materials can be used after prior acceptance of the producer and a third party for quality control. However, the processed material should have the said specifications.
Pipe Diameter
Pipe Length
The standard laying length (L) of Krah pipes is six meters, because in this way they are easy to handle, store and transport. In addition it is possible to continously produce any length between one and six meters. The longer a pipe is, the fewer joints are necessary and this is advantageous for the installation of the pipe. Moreover it is possible to deliver the pipes already jointed, whereby the installation time on site can be reduced signifcantly. Lengths of up to 18m consisting of 3 pipe sectionsare common
Profiles Wall Pipes
Internal Pressure
The Krah pipe system can withstand low working pressure of up to 3 bar, depending on the thickness of the waterway wall (s1). Equivalent to DIN 8074 the hoop stress formula can be used to calculate the s1 as the minimum wall thickness.Wall Thickness
Both profiled and solid wall pipes with wall thicknesses of up to 300mm can be produced. The quality of the pipe is highly dependent upon the quality of the waterway wall, therefore all Krah pipes are usually produced with a minimum waterway wall of 4mm.
When
Monday-Friday
07:30 – 16:00
How
+971 2 6423 999
+971 50 555 7777
Where
MQ Tower, 543 Muroor Road, Abu Dhabi, UAE