To main content

Installation gas pipeline, Gelugor Mainline

The Gelugor transportation system is a 24'' gas pipeline from the Tenaga Nasional Berhad (TNB) Prai Power Station, Mainland Peninsular Malaysia across the Strait of Pinang to the TNB Gelugor Meter Station on Pinang island. The pipeline has a length of 6.4 km and was put into use in the beginning of 2000. Boskalis Offshore has constructed the protection of the pipeline with rock material. The function of the protection differs along the chainage of the pipeline. A shipping channel is situated between the island and the peninsular. The pipeline in the shipping channel has been covered for to protect against ship anchors (drop and drag).

Outside the shipping channel, the pipeline is partially protected to secure the stability of the pipeline. Furthermore, the protection serves to limit the length of the possible freespan to an acceptable length. Spanning of a pipe can be caused by morphological changes of the seabed. The preparations of constructing the protection started in the beginning of January 2001; the rock dumping started in the beginning of February. The environmental conditions, limited time span and life pipeline made the project more complicated.

Caused by tidal variations, the occurring current velocities reached levels of upto 2.0m/s. The water depth along the chainages varied from 0 to 16 meters. A high voltage cable (132kV) was already constructed along the gas pipeline and in use. Precautions were required that the anchors did not damage the high voltage cable. The limited time span of the project was set by the Client to diminish the risk of damaging the pipe. Furthermore, damage of the life pipeline would have heavy impact on the ecological environment. These conditions required accurate rock dumping and tailored working methods.

Related projects

Selected filters
DJI_0005__4_.JPG

Construction of greenfield port and breakwater for Dangote quays Lekki

The Dangote Group, owned by Aliko Dangote, is building Africa’s largest oil refinery and fertilizer plant in Lekki, 60 kilometers east of Lagos, Nigeria. To facilitate the import of out-of-gauge components and other materials required for construction activities, a port was constructed

P67.jpg

P67 FPSO Transportation

On behalf of Company Petrobras and Client COOEC, Boskalis executed the dry transportation of the P-67 FPSO in 2018 from the COOEC Qingdao yard in China to Rio de Janeiro in Brazil. The P-67 FPSO will produce 150,000 bpd and compress six million cubic meters of natural gas daily in the Lula North section of the Lula-Cernambi field in the Santos basin.

Harderwijk_Lorentzhaven__7__header.jpg

Redevelopment Waterfront, Harderwijk

Boskalis Nederland is involved in one of the largest redevelopment projects in the Netherlands. The Harderwijk Waterfront project involves the complete transformation of the lakeside area of this IJsselmeer town. The project covers a strip approximately six kilometers long, combining homes, work and recreation in a natural way. The Harderwijk Waterfront will generate a quality boost in many areas: quality of life, employment, traffic, tourism and the environment.

Pluit_City_Island-bird_eye_view.jpg

Artificial island
off the coast of
Jakarta, Indonesia

Boskalis has been awarded a contract by PT Muara Wisesa Samudra to design and construct an artificial island measuring 160 hectares off the coast of Jakarta, Indonesia. The work is part of the dredging and land development works for the new Pluit City. It will be executed in a joint venture with Van Oord.

Medium-Foto_1_-_artist_impression_nw_situatie_A1_afslag_met_spoorbrug__1_.jpg

Road enlargement motorway A1-A6, Diemen-Almere

The A1/A6 project is one of the five sub-projects for Rijkswaterstaat that are included in the upgrading of the road network linking Schiphol Airport, Amsterdam, and Almere (SAA). The total length of the SAA link is 40 kilometers. Boskalis, together with partners, is responsible for the section from the Diemen intersection to Almere, a distance of approximately 23 kilometers.

29-8-11_006_header.jpg

Port maintenance,
Açu Port

Açu Port in São João da Barra, Rio de Janeiro (Brazil) is one of the largest port-industry complex in Latin America. The port consists of two terminals: T1, an offshore terminal for handling iron ore and oil, and T2, an onshore terminal built around the inner navigation channel which accommodates offshore supply companies and will handle bauxite, general cargo and vehicles.