For gas pipelines in permafrost regions， it is well-known that the most serious hazards， such as differential thaw settlement and frost heave， affect the engineering foundations and the integrity of pipeline systems. However， in case of a compressor station outage， the chilled gas will bypass the outage station， flow directly to the downstream pipeline and continue the cooling due to the Joule-Thomson cooling effect. The dangerous scenario that the transporting temperature may fall to a level below the minimum design temperature has not been paid adequate attention because this kind of potential challenge has never been encountered for pipelines in temperate regions. Taking one planned gas pipeline project in permafrost regions as an example， temperature controlling strategies and feasible approaches were given on the perspective of protecting permafrost and technical measures， such as using high discharge temperature， forced flow reduction and installing extra gas heater stations， evaluated quantitatively and discussed using international hydraulic software SPS. Finally， the initial framework solutions were proposed in the hope of supplementing existing gas transporting process theory and identifying new approaches for gas pipelines in the northern and upland permafrost regions.