Hydraulic Transients Induced by Pigging Operation in Pipeline with a Long Slope

Table 2

Summary of two accidents.

	The first accident	The second accident
Number of compressor	2	1
Total time of pigging process	20 Hours	39.5 Hours
The length of drainage pipe	150.0 m	150.0 m
The drainage pipe size	Φ159.0 × 8.7 mm	Φ159.0 × 8.7 mm
The length of rupture	2.6 m	2.5 m
Maximum of air pressure		1.01 MPa
Bursting pressure of tube	20.83 MPa	20.83 MPa