Krah Community - Members' Magazine #1

Krah Community
News from the Homepage
DIN SPEC 19674
Implementation for Krah PE-GF pipes
New machine
for the fabrication of thermoplastic tanks
See also: Krah AG solved customer problems with new band saw for plastic pipe producers
New machine for the fabrication of thermoplastic tanks


Welcome to the first issue of ImProfil

Dear Members of the Krah Community and friends and interested people,

As announced during our last community meeting in cologne, now we are presenting to you the first newsletter of our community. Recipients of this newsletter are mainly active (registered) members of the Krah community and passive (not registered ) owners of a Krah Production line and it will be released at regular interval. Contents of this newsletter are important news around the Krah World.


If you are not interested in receiving informations about this topics, you are able to unsubscribe the service at the bottom of this mail.


The last K-show demonstrated again that the world of plastic is full of innovations, challenges and new players around the world. We got a lot of exiting impressions and impulses for our new Krah strategy and for our new developments:

  • The new Krah Band saw will be an integral part of the krah product range in the future
  • Many companies are very interested in the new thirteen meter long mandrels and ask for an upgrade of their machines
  • The new developed production machine 'Solid1' is the answer to many inquiries of the market for industrial tanks and apparatus.
  • Even the most important innovation has already started with the development of 'Phoenix' - the new generation of helical extrusion for 2012

We are looking in the future and we try to provide our actual customers and prospects an optimum on improvements and information in the future, to keep their and our business successful.

Your sincerely

Alexander Krah
CEO of the KRAH AG



News at the homepage of Krah Community

Dear friends and colleagues, the first Newsletter is created and one of the regular topics of each newsletter will be the report about the News at the Krah Community Homepage.

During the last Krah Community Meeting we decided to fill the page with much more helpful information for the day-to-day business. We have concentrated our activities firstly to technical information and we add for example:


  • data sheets of many raw materials, what is used in the world
  • Customer-Questionnaire for new pipe and manhole projects
  • Sample drawings of fittings, manholes and silos
  • Manuals for Krah machines
  • Excel Calculation sheets with equations for
    • pipes loaded with inner pressure
    • punshing of drainage pipes
    • manhole acc ASTM F1759
    • vertically tanks
  • Tender spec for Krah pipes and manholes
  • More standards (especially have a look to the English translation of the new DIN 16961)
  • Pictures of pipe applications and manholes
  • Remarkable compares with our competition (for example: GRP, Concrete, SRP …)

Our next project is to integrate an public area for frequently asked questions and for this we could need your assistance – send us the most interesting questions of yourself and your customers.

Furthermore, if you have interesting informations you imagine a partner in another part of the world could use it, send us the information. No matter if images, reports, datasheets, excel files, marketing informations etc. – all can assist our common goal.



Implementation of DIN SPEC 19674 for Krah PE-GF pipes

The German Standard DIN SPEC 19674 has successfully passed the board of DIN committee and is already published in German language - the according English translation will be available short termed.

Header of the document:
Plastics piping systems made from glass fibre reinforced polyethylene (PE-GF) for water supply and for drainage and sewerage under pressure


Basis for this document was the international Standard ISO/CD 29561. Krah AG values this as an additional and very important step on the way of implementation of KPPS pipes to the international pipe market.

  • The general safety design coefficient C is 1.6, but also other values can be used when there is an agreement between manufacturer and end-user. The minimum value for C is 1.25
  • Diameter of Pipes from DN/ID 300 up to DN/ID 4000 mm are included
  • Attachment regarding the perfect ringstiffness and modulus of elasticity, for using KPPS even as drainage / sewer pipe

How can we manage the International Standard of PE-GF pipes?
Our strategy is that our customers / partners established similar national standards and specifications in their own countries. The more national standards we have implemented in the world, the more influence we will have also on international level.

The official documents can be ordered under: www.beuth.de



Pipe production tool with 13m length available

The company Krah – market leader for helical extrusion technology – has developed a 13 meter long mandrel for production of helical extruded pipes. With this innovation customer can manufacture in one cycle pipe length of 12 meter now. At first Krah offer this innovation for PE and PP pipes from DN 600 up to DN 3000, but bigger dimensions are also possible. In the past the standard length of such mandrels was 7 m, so that production was limited to 6m pipe length. Now the tooling time can be reduced by 50% and the production method becomes even in pipe weight more efficient than before.

As known from the 7 m tools it is still possible to integrate socket and spigot directly at the end of the pipes.
Even for the contractor this pipe lengths provide a lot of cost savings, 50% of joints can be saved and specially for long distance projects it is very interesting.

For every customer who bought in the past a production line for 6 m pipe length production Krah offers an complete upgrade for existing machines and mandrels. Krah has developed a special procedure for extending the old 7 m long mandrels to 13 meters. Even railway and electrical devices can be changed.




Krah AG solved customer problems with new band saw for plastic pipe producers

The new band saw KBS 4600 is the worldwide biggest band saw which is available for cutting of plastic pipes with an outside diameter up to 4.6 meter. During the last years, Krah AG has focused on the development of production lines for large diameter pipes, which could be realized 2009 with the first 4 meter diameter plastic pipe made from HD-PE and Polyethylene glass fiber reinforced material (PE-GF).

Due to this new development, a new request was given in view to the machining of these large diameter pipes if they are used for fitting or manhole production. During the K-Show 2010 in Düsseldorf the new band saw was presented and has caused big interest among the visitors.

(Read more...)




New machine for fabrication of thermoplastic tanks

The engineering company Krah AG, worldwide known for production lines for large diameter pipes and leading in the technology of helical extruded pipes has developed a new production line for cylindrical tanks. The new line “Solid 1” is specially designed for the market of thermoplastic tanks, apparatus and ventilation systems. This new development was mainly attributable to the high technical and commercial requirements of the market as potential customers are always looking for high quality products, maximum production flexibility and of course efficiency relating to the output.

(Read more...)