Ras Laffan Port, managed and regulated by Qatar Petroleum (QP), is located on the northeast coast of Qatar. The Port was designed as the export facility for Liquefied Natural Gas (LNG), Liquid Petroleum Gas (LPG), Condensates, Petroleum Products and Sulphur.
LNG Berth 3 & Berth 4 accommodate LNG vessels up to 185,000t displacement and with maximum draft of 12.5m.
LNG Berth 3 was constructed in 2004 while LNG Berth 4 in 2006. Both have symmetrical “T- Island” berth arrangements comprising concrete blockwork gravity type structures.
Maintenance of the berths by COMPANY in 2013 identified the formation of cracks in the mooring dolphins MD3D and MD3E. the identified root cause of the cracks is delayed ettringite formation (DEF).
Based on the latest CH2M Dive Survey Report in Oct 2017 provided by COMPANY, there are 28 cracks associated with DEF in MD3D and these are limited to the top two mass concrete blocks located beneath the cap block and in the bottom mass concrete block in MD3E
