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New methods for laying the pipeline Haute de France II

08-27-2013 11:29 AM CET | Industry, Real Estate & Construction

Press release from: MAX STREICHER GmbH & Co. Kommanditgesellschaft auf Aktien

/ PR Agency: HeadlineAffairs
New side boom cranes place the pipeline into the trenches.

New side boom cranes place the pipeline into the trenches.

MAX STREICHER GmbH & Co. KG aA is laying 51.7 kilometres of pipeline on behalf of GRTgaz

Deggendorf, August 2013 – GRTgaz is currently extending France’s gas transmission network with the Haute de France II (HDF II) pipeline project. MAX STREICHER GmbH & Co. KG aA has been commissioned by GRTgaz to complete the second construction lot. STREICHER is laying 51.7 kilometres of DN 1200 gas pipeline between Corbie and Cuvilly in the Picardy region near Amiens. Working in the “bread basket” of France presents new challenges to pipeline construction experts and calls for new laying techniques.

GRTgaz is building Haute de France II as a parallel pipeline to the existing Haute de France I. HDF II starts in French Dunkirk, near the Belgian border, and runs south. The soil in the generally flat area STREICHER is working in is loose and stony. The pipeline has to cross many other lines in the area. A total length of 370 metres is being laid using microtunelling drilling techniques. Countless streets and existing lines have to be crossed using closed methods of laying. The Luce and Avre rivers will be crossed using open laying techniques.

In the area around the Somme river a new trenchless construction method is to be used. The 1120 metre stretch will be crossed using the direct pipe method. Direct pipe is a combination of two established laying techniques, horizontal directional drilling (HDD) and microtunelling.

Pipeline construction and agriculture going hand in hand

The particularly ecological requirements for completing this work affect the whole construction process. The area that Haute de France II runs through is known as the bread basket of France. The focus of the process is to protect arable land and ensure sustainable soil quality.

Therefore in bad weather and at a certain level of soil moisture construction work is halted so that the soil is not negatively affected. To ensure that the work is as efficient as possible, whenever possible the construction methods are decided on in agreement with the Chambre d’Agriculture (Chamber of Agriculture).

CRC double welding power

Work on the Haute de France II project is carried out using the CRC-EVANS welding method. This involves welding the root of the seam from the inside with four torches simultaneously. Automatic welding machines with double burner systems are used for the filler layers as they allow welding from two places at a distance of ten centimetres simultaneously. This allows for higher deposition rates than with other methods. The production rate is also significantly higher. The current top performance rate in STREICHER’S work is more than 40 welding seams per day.

In total at the second construction site, approximately 3200 seams will be welded and three valve stations and one receiving station will be completed. Since March approximately 230 STREICHER employees have been working north of Paris on site on the project. The first pressure tests should take place in October and the gas pipeline is due to be ready for use in March 2014.

With a tradition of more than 100 years, the STREICHER Group combines quality and expertise with many years of experience in the business sectors pipeline and plant construction, mechanical engineering, civil and structural engineering as well as raw and construction material. The parent company MAX STREICHER GmbH & Co. KG aA headquartered in Deggendorf (Germany) employs approximately 3,000 specialists at home and abroad.

Kommanditgesellschaft auf Aktien
Tanja Schmidt, Leitung Marketing
Schwaigerbreite 17
94469 Deggendorf
Tel. +49(0)991 330-213
Fax +49(0)991 330-297

Rumfordstraße 5
80469 München
Tel. +49(0)89 23 23 90 93
Fax +49(0)89 23 23 90 99

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