top of page
IMG-6819_edited.jpg

Construction department 

Logo_fix_white.png

Services

Company performs high quality construction works for all kinds of natural gas infrastructure objects as well as other piping infrastructure systems, including:

Main gas pipelines

Pressure up to 5,5 MPa

Heating, water and sewage 

Pipe systems

Gas and oil terminals

Construction of infrastructure

Oil product pipelines

Oil and oil product pipelines

Construction department news

Our ambitious construction projects over the last years

DSCF0025_edited.jpg

A/s Latvijas Gāze

Capital repairs for underwater passes over Gauja river of Pskov-Riga and Izborsk-Inchukalns gas pipelines”

2014-th year

Pomorska Spółka Gazownictwa sp. z o.o. (Gdańsk)

Construction of high-pressure gas pipeline DN500 section Kolnik-Gdansk, L= 4,5 km

2012-th – 2013-th years

DSCF0037_edited.jpg

Construction department news:

2014-th year

A/s Latvijas Gāze

Capital repairs for underwater passes over Gauja river of Pskov-Riga and Izborsk-Inchukalns gas pipelines”

2012-th – 2013-th years

Pomorska Spółka Gazownictwa sp. z o.o. (Gdańsk)

Construction of high-pressure gas pipeline DN500 section Kolnik-Gdansk, L= 4,5 km

GAZ-SYSTEM S.A.

Construction of high-pressure gas pipeline DN700 section Gustorzyn-Odolanów Phase I-II, L= 20 km, DN700 / L485MB

Assembly joints and laying DN 700 section Szczecin – Lwowek 1- 40 km, DN700 / L485MB

The 2011th year

A/s Ventspils Nafta (Latvia)

GAZ-SYSTEM S.A.

Installation of oil product pipeline in Ventspils (Latvia), and reservoir park, L=5,0 km

Transmission pipeline Riga - PGK 2 - the line segment with the replacement of defective casing under the railroad Inčukalns region

GRP 90/1 and GRP 90/2 inlet and outlet valve assemblies Demolition and construction of a new valve assemblies Strautu street 108th

November 2010

Pomorska Spółka Gazownictwa sp. z o.o. (Gdańsk)

Using a PE pipes in a Project „Daugava river underwater crossing by HDD method

For the mud transfer from pipe site to rig site a mud transfer pipeline is required. For this purpose a HDPE pipe OD 200, SDR 11 has to be installed in one of the existing steel pipes DN 500. This preparation has to be ready, before the pilot drilling is completed. During reaming the drilling fluid, which emanates from the HDD hole at the exit point will be pumped via this HDPE pipeline back to the rig site where it is recycled and can be used again.


The DN 700 steel pipe string has to be prepared in the extention of the HDD. There is only approx. 1000m length available between the exit point and the main street. As such it is not possible to prepare the complete steel pipe string in one single length but two strings have to be prepared. Therefore it will be necessary to stop the HDD pullback installation for a so called “golden joint”. To reduce the stop time for the HDD the welding procedure has to be prepared as easy as possible. It is therefore necessary to make the golden joint not in the area of the overbend construction.. The overbend is approx. 200m long. The string length should therefore be 800m (1000m -200m) for string no. 2 and 710m for string no. 1. A large difference in length and a preparation as far as possible behind the exit point is an advantage, because in this case, the pulling can be continued during coating works.


This helps to reduce the risk involved in the interruption. Both strings have to be pressure tested and coated. Then a HDPE pipe OD 110mm SDR 11 has to be pulled into the steel pipes. This HDPE pipe will be used as filling line for the buoyancy control. On the front end of the steel pipe string 1, the pulling head has to be welded.

bottom of page