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 The first line of the Yamal transit pipeline on Polish territory was constructed and commissioned in stages. In November 1996, the first 107 km section was completed between Górzyca and Lwówek near Poznań.
The construction of this section enabled the transfer of Russian gas to Germany through Poland's existing gas transmission network. The construction and assembly work was carried out by a Polish company GAZ-2000 SA.
The second section of approx. 210 km between Lwówek and Włocławek and the third section of approx. 365 km between Włocławek and Kondratki were completed in September 1999, which marked the completion of the entire first line on Polish territory.
The following were the key contractors in the second and third section:
- GAZ-2000 SA
in the Wielkopolskie province - approx. 119 km;
- MegaGaz SA
in the Wielkopolskie and
Kujawsko-Pomorskie provinces - approx. 56 km;
- BUG
Gazobudowa Sp. z o. o.
in the Kujawsko-Pomorskie and Mazowieckie provinces - approx. 213 km;
- Naftowo–Gazowe
Przedsiębiorstwo Budowlano-Montażowe
“Karpaty” SA
in the Mazowieckie and Podlaskie provinces - approx. 182 km.
The German company Pipetronix GmbH
conducted specialised pressure tests of the entire gas pipeline.
Materials for the pipeline construction have been supplied by leading international and Polish companies.
Since no Polish steel mill manufactures pipes to parameters required in the Yamal transit pipeline and since it would pose excessive technical challenges and offer no economic viability to commence such production in Poland, the project has relied on the best products offered by renowned international companies.
14200 mm transmission pipes for Section I and II have been supplied by the Italian steelworks Ilva Lamiere e Tubi. EuRoPol GAZ representatives and Bureau Veritas engneers had audited the steelworks before production commenced to check its capability of complying with the detailed project specifications. Pipes for Section III have been supplied by the German company
Mannesmann
Handel AG.
Bureau Veritas was responsible for overseeing the production and quality certification of pipes.
High pressure ball valves from the French company Cameron, together with
drives, have been supplied by the German company Fahlke Control Systems.
Fittings, tees and elbows have been supplied by the German company RMA Maschinen und Armaturenbau Faulhaber & Truttenbach KG,
represented in Poland by Unitol, General
Partnership. It has also
supplied pipes of all diameters for the construction of valve stations
(with the exception of the 1420 mm pipes supplied by Ilva and
Mannesmann).
The US company Raychem and the Canadian firm Canusa Systems Limited
are the suppliers of heat-shrinkable sleeves for anti-corrosion protection of welds. The German company Franken
Plastik GmbH provides spacers for casing pipes assembled under terrain barriers such as railway tracks, roads etc.
The Polish steelworks Huta Ferrum has delivered a compression chamber and casing applied as protective piping in the course of crossing terrain barriers. The Polish firm Armatech, has supplied the supporting system for the protective casing.
Concrete ballast weights for the 1420mm diameter pipes have been produced by local manufacturers, including Przedsiębiorstwo
Drogowe “Drogrem” a road contractor from Poznań and Przedsiębiorstwo
Prefabrykacji “Mobet” a pre-fabrication company in Mogilno.
The quality assurance system, rigorously
applied by the general contractors during the building and
construction works requires, among other things, that the
applied welding technologies had to be subjected to validation
tests in compilance with the requirements of the European EN
288 standards. The qualifying tests of the welding
technology applied for the construction of the transit
pipeline were conducted by the Laboratory of the Welding
Technology Institute in Gliwice, accredited by the Polish
Testing and Certification Centre (PCBC), whereas the
qualifying verification of the method of making the joints of
the cathode protection lines was done by the laboratory of the
Nuclear Research Institute in Świerk, also accredited
by the PCBC.
All
the welders were subjected to qualifying examinations in
compliance with the European standard EN 287-1.
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