The role of the pig

1. Natural gas pipelines in operation: remove corrosive substances such as accumulated water, light oil, methane hydrate, iron oxide, carbide dust, carbon disulfide, hydrogen sulfuric acid, etc.; reduce the corrosion damage of corrosive substances to the inner wall of the pipeline; re-clarify Pipeline direction; detect pipeline deformation; check the integrity rate of valves along the line; reduce working back pressure.

2. Crude oil pipeline in operation: pigging before inspection in the pipeline, pigging of oil pipelines in low-volume intermittent operation; removing oil condensate, waxing, and scaling inside the pipeline to reduce oil back pressure and wear resistance. The purpose of lowering the oil temperature.

3. Chemical materials and edible oil pipelines: clean up pipelines with polymerizable materials; isolate different pipelines to realize single-pipe multi-product transportation and metering pipelines.

4. Sectional pigging and sweeping line pressure test: remove pipeline debris, rust, drainage, and exhaust.

5. General cleaning pigging pressure test: detecting pipeline deformation and construction quality. Exhaust before hydraulic test, drain before production, dry, and isolate media.

6. Water delivery and injection pipelines: remove scale and sediment.