In long-distance oil and gas pipeline systems, full-bore ball valves are core equipment for ensuring full flow and reducing flow resistance. Their design, characterized by an inner diameter consistent with the pipeline's inner diameter, places higher demands on the smooth passage of pigs (pig balls, wax scrapers, etc.).
Structural interference or deformation within the valve cavity can lead to pig jamming, pipeline blockage, and even safety accidents.
This article systematically summarizes the technical key points of full-bore ball valve pig passability testing, combining international standards (ASME, API) and domestic specifications (GB/T).