Romania’s Neptun Deep strategic gas project reaches pipelaying stage, signalling major progress OMV Petrom, the largest integrated energy producer in South-Eastern Europe, and partner Romgaz, the largest producer and main supplier of natural gas in Romania, announced the start of construction works on the offshore pipeline that will transport gas to the shore, an important step forward in the Neptun Deep project. The pipeline installation phase is a key component of the project. The pipeline will stretch over approximately 160 km, built from thousands of steel pipe segments with a diameter of 30” (76 cm).