Once the hydrostatic stress and leak testing have finalised, the pipeline is depressurised and emptied.
To undertake pipeline dewatering, we at ITP Service use bi-directional pipeline pigs prior to the filling and calibration operations. The pipeline pig is propelled from the test head receiver up to the initial position in the test head launcher, injecting air as a means of propulsion.
NPS 48 INCH X 250 KM TRANSMISSION GAS PIPELINE (INTERCONNECTOR) "BORDER OF BULGARIA - BORDER OF HUNGARY" - SECTION 2, 3, 4
Client: IDC CONSORTIUM
Year: 2019 - 2020
Scope: 250 km x NPS Ø 48”
Completed works: Hydrostatic pressure testing, extra-dry air drying, Caliper Pig evaluating and nitrogen services.