Date of download: 11/6/2017 Copyright © ASME. All rights reserved. From: The Technique of Segmental Pigging Process for Long Distance Pipeline of Oil and Gas in China J. Pressure Vessel Technol. 2016;139(1):011701-011701-7. doi:10.1115/1.4034284 Figure Legend: Water pressure testing schematic diagram: 1—setting pond; 2—reservoir; 3—filter casing; 4—filter; 5—centrifugal pump; 6—check valve; 7—flowmeter; 8—pressure testing car; 9—flowmeter; 10—valve; 11—valve; 12—pressure balance; 13—automatic pressure recorder; 14—pressure gage; and 15—emptying valve