Krah Community - ImProfil Magazine #9
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Article 1 30% less Energy Consumption... Article 2 Krah - Large Pipe Technology
Outfall DN/ID 3000 mm in La Taboada, Lima, Peru
Article 3 Helical Extruded Polyethylene Pipes for Pressure Application
Pressure Test DN/ID 1700, SDR 26, Design pressure PN 6
See also: A solution of Krah Technology to repair a direct extruded outfall pipeline
Principal Groundwater Discharge for Codelco / Ministro Hales Mine
ImProfil Of: Ralf Schnitzler / Krah AG
Butt-Fusion of Glass-Fiber Reinforced Polyethylen Pipes (PE-GF)
Damage and vulnerability of materials in sewage systems
Companies introduce themselves United Gulf Pipe Manufacturing Co. LLC / Plaspitec GmbH
Informations: Current Market Prices for Commodities in Middle and Eastern Europe

This issue of "Improfil"

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The new year „2014“ has already started and the trend for large pipe system continues. Krah AG is fully booked for the year 2014, so we are looking forward to a good year! This good prospects are mainly due to the K2013. The big trade fair with its high quality of visitors was a full success.

Kalli, our new explanation movie, is now available in the following languages: English, German, Russian and Spanish. We will extend our Youtube Channel even more, just search for “Krah AG” – or better subscribe the channel. We plan to make more of these informative videos of Kalli. Should anybody have a special request, please let us know and we will try to realize this. (info@krah.net)

Finally the special topic: Poland!
My personally longest sales activity – 8 years – has finally end up in big success - December 2013.in the near future a Krah-pipe production plant will be established in Poland – very closeto the German border.


My friends, 2013 was exciting, but 2014 promises to be even more exciting. We´ll start some very interesting development projects, for piping systems, for machine improvements and for complete new machines.

And a highlight will definitely be our Community Meeting, no question about this ;) This year its gonna take part in TALLIN / ESTONIA, 3-6 June. The invitations will follow very soon and I hope we all meet up there.

Looking forward to the joint development, take care

Yours Alexander



30% less Energy Consumption...

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...was not the only reason for the English Polypipe Group to purchase the Krah Compounder Concept. Since many years Krah is with the ComTruder® involved in the inline compounding technology. Until today the system was used to produce and to extrude a compound based on PE/PP with glass-fiber or Calcium Carbonate as a part of the spiral pipe production machines KDR700 and DR700.

For Polypipe now Krah developed a standalone compounder to produce Polyethylene Pellets, filled with Calcium carbonate (30%). The standalone compounder, called Comtruder®, has an output of 700 kg/hr. The pellets are produced by an underwater pelletizer, what is flanged directly to the comtruder.


The energy consumption of the new Comtruder® compared to normal Compounder is 30% less, due the unique Krah-compounding-system.


(Read more...)



Krah - Large Pipe Technology
Outfall DN/ID 3000 mm in La Taboada, Lima, Peru

In this year 2013 a new record was made in Lima, Peru. Polyethylene pipes DN/ID 3000 were used for a deep water outfall pipeline. The polyethylene pipes were produced according to the Krah-Technology in Spain by PPA&Krah, Vitoria. PPA&Krah had already a lot of successful installed large outfall pipelines in the Mediterranean Sea and Atlantic Ocean. One of the challenges in this Project was to open a new site for the Krah Large Pipe Technology – The Pacific Ocean.

The “Taboada” Wastewater Treatment Plant is one of the biggest constructions for sewage treatment all around the World.

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The aim of the Project was to increase significantly the amount of treated water in the city of Lima, thus reducing ocean pollution and improving the health conditions in the area.


(Read more...)



Helical Extruded Polyethylene Pipes for pressure application
Pressure Test DN/ID 1700, SDR 26, Design pressure PN 6

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Pressure pipes made of Polyethylene are successfully used since the 50ths of the last century. In more than 60 years the material has developed significantly in mechanical, thermal and physical characteristics. Mostly used in the pressure market is the pipe grade PE100 with a long term strength of 10 MPa (MRS 10). Furthermore you find in the market PE-types with optimized properties for example with a better resistance against slow crack growth, called PE 100 RC (crack resistance) or fiber reinforced polyethylene pipes (e.g. Krah PE-GF 200) with very high strength and stability (MRS 20).

The international mostly used standard for polyethylene pressure pipes is the ISO 4427. Even if this standard has some limitations in tolerances and dimensions, it is always a good basement for more detailed specifications.

The requirements of ISO 4427 are original made for external calibrated pipes (direct/axial-extruded) and the standard is limited until pipe diameter OD 2000 only. Nevertheless the physical and mechanical requirements can be adopted for larger dimensions easily.


(Read more...)



Principal Groundwater Discharge for Codelco / Ministro Hales Mine

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Krah Chile is using Krah PE-GF Pressure Pipe Technology since 2009. The installed Krah KDR 700 is able to produce pressure pipes with standard PE100 or with PE-GF200. Since beginning Krah Chile delivered their pressure pipes for many applications. One examplary project is described below:

Krah Chile produced more than 1300 meter PE-GF-pressure pipes in dimension DN 300 and for pressure class PN 16. The pipes are designed with a safety factor of 1,25, that means the total wall thickness is 15,8 mm ( SIDR 19)


The pipes were supplied for Ministro Hales Mine owned by Codelco, the largest company of the state of Chile. The mine is located in the Atacama Desert, near the city of Calama, 1570 km north of Santiago de Chile. In this area the outside temperature reach in summer more than 40 °C and in winter temperature drop down to -10 °C. The pipeline is necessary to supply fossil water from the original accumulation pool to the project reservoir for usage in the mine.


(Read more...)



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10 Questions for...

Ralf Schnitzler / Krah AG

(Read the interview online...)




Butt-Fusion of Glass-Fiber Reinforced Polyethylen Pipes (PE-GF)

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General:

Since some years helical extruded pipes made of PE-GF are used in the market for pressure application.
Worldwide many projects have been realized in various diameters and for pressure applications up to 16 bar. The pipes are produced by the Krah Comtruder®-Technology, what guarantees a homogenously distribution of the chopped glass-fibers and the coupling-agent in the polyethylene-matrix. The international available standards for pipes DN/ID 400 until DN/ID 4000 are ASTM F 2720/ASTM 2720M, DIN SPEC 19674 and ISO/CD 29561 is still in process.


Mostly used in the market is the PE-GF 200 with a MRS-class 20 MPa, based on 20 % Glass Fibers, 2 % Coupling agent and 78 % polyethylene matrix of PE 100.
Joining of this kind of pipes is done either by the typical Krah-Electrofusion-Technology or by Butt-Fusion.


(Read more...)



Damage and vulnerability of materials in sewage systems

This essay focuses on three central questions:

  1. What are the most common damages happening to pipes in waste water systems?
  2. By which factors are such damages caused?
  3. Which material is especially weak or strong in resistance against certain damages?
The advantages of pipe-materials and the needs of a proper sewage system are well known. Less highlighted are usually the disadvantages of materials or the most frequent damages occurring. This overview shall present these in three pinpointed questions and answers.


(Read more...)



Companies introduce themselves

United Gulf Pipe Manufacturig Co. LLC

UGPM


PlaspiTec GmbH

PlaspiTec








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