Welding Works On Gas Pipeline Completed

Welding works on the 111-kilometre onshore gas distribution pipelines that will transport gas from the Processing Plant at Atuabo to the Aboadze Thermal Plant have been completed.

The distribution pipelines, which are a critical link between the processing plant and the Aboadze Plant, would see to the transportation of lean (natural) gas from the processing plant to Aboadze.

According to officials of the Ghana National Gas Company (GNCG), when completed it would facilitate the fastening of the onshore pipelines to the flange (a plate or ring at the end of a pipeline) of the Floating Production Storage and Offloading (FPSO) facility.

The Chief Executive Officer (CEO) of Ghana Gas, Dr George Sipah-Yankey, told the Daily Graphic in Accra yesterday that officials would undertake a hydro-testing exercise on the pipelines in the coming weeks to check leakages and also to determine and verify the integrity of the pipelines.

“The hydro testing is in line with our quality assurance procedures to ensure that the pipelines are structurally sound and can withstand the internal pressure before being put into service,” Dr Yankey said..

The CEO also hinted that work on the processing plant, which was progressing steadily, would further facilitate the release of gas when the processing plant was completed.

Dr Yankey, who described the completion of the welding works as a major milestone, also indicated that the tie-in weld of approximately 200 metres, which was a final length of the pipeline to be lowered, was also being worked on.

Generally, gas pipelines are hydro-tested by filling the test section of the pipe with water and pumping the pressure up to a value that is higher than maximum allowable operating pressure (MAOP) and holding the pressure for a period of four to eight hours.

Dr Yankey also said that the completion of the welding works would enable officials to begin pre-commissioning work on both the onshore and offshore pipelines.

Work on the Gas Infrastructure Development Project stalled in May this year following the government’s indebtedness of $700 million to the main contractor, Sinopec International Petroleum Service Corporation, but the work resumed in July this year after the government, through the Chinese Development Bank (CDB), had paid $188 million to Sinopec.