Speed Simulation of Pig Restarting from Stoppage in Gas Pipeline

Table 2

Simulations of the maximum speed of pig restarting from a stoppage using RSM.

Run number	Gas pressure [bar]	Obstruction [bar]	Maximum pig speeds of restarting it in different ways [m/s]
			By increasing inlet pressure	By decreasing outlet pressure	By increasing inlet pressure together with decreasing outlet pressure
1	80	2	4.53	4.65	4.57
2	20	8	53.80	73.60	65.72
3	20	2	16.78	18.02	17.30
4	80	5	11.15	11.55	11.42
5	50	2	7.33	7.58	7.12
6	80	8	16.60	16.90	16.82
7	20	5	37.50	45.00	41.41
8	50	5	17.15	18.50	17.83
9	50	8	25.85	28.88	27.65