In isolated instances where carbon dioxide usage is extremely low, heat leak into the tank is sufficient to maintain the contents above 245 psig and a pressure buildup coil is not needed.

• 在二氧化碳用量极低的隔热场合，泄漏进容器的热量足以使内容物的压力维持在245 psig以上，因此不需要压力积累蛇管。