The Safe Transfer of Liquefied Gas in an Offshore Environment (STOLGOE)

Published: October 2010

Author: OCIMF

This is a guide to the transfer of Liquefied Petroleum Gas (LPG) between Floating (Production) Storage and Offloading (F(P)SO) facilities and conventional gas tankers. It covers every stage of the operation, including pre-arrival procedures, berthing and mooring, cargo transfer, unmooring and departure, gas-up and cooldown. It also discusses operational and personnel safety and emergency preparedness.

This publication primarily addresses side by side (SBS) operations where the gas tanker moors alongside the F(P)SO. It includes recommendations for mooring equipment and considers mooring loads and operations, motions of the F(P)SO and gas tanker, station keeping, cargo transfer equipment and cargo transfer operations. The guidelines are intended to assist in standardising equipment and procedures for SBS activities and to highlight general design issues in the interest of safe, efficient and reliable operations.