Closed drains; Protective embankments and temporary drains

Closed drain in a gas processing terminal is required to allow process vessels to be drained during maintenance; the system usually consists of a series of closed drains headers and a vessel. The closed drains is usually sized to take the largest inventory from the process trains and duty/standby pumps are provided for pumping the …

Packing and drafting

Terms relating to swing of gas. Packing is where flow rates of gas into a pipeline are greater than withdrawal rates, then at times of high demand for the gas the pressure in a pipeline is allowed to fall, leading to drafting, where rates into the pipeline are less than withdrawal