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

Table 1

Summary of basic parameters for field operations.

Parameters	Values
The length of pipeline	6.93 Km
Pipe size	Φ1219 × 18.4 mm
The maximum elevation difference	178.5 m
Wall equivalent roughness	0.01 mm
Mass of pig	700.0 kg
Frictional resistance between pig and pipe wall	0.03 MPa
Static friction resistance between pig and pipe wall	0.04 MPa
Type of compressor	XHP1070
Rated operating pressure	2.2 MPa
Air displacement	30.0 Nm^3/min