API RP 1110 pdf download Pressure Testing of Steel Pipelines for the Transportation of Gas, Petroleum Gas, Hazardous Liquids, Highly Volatile Liquids or Carbon Dioxide 4.14 feature:Any physical object detccted by an in-line inspection device.Features may be anomalies, components, ncarbymetallic objocts, or some other item. 4.15 freeze plug: A pipeline isolation point created by freezing hydrostatic test water inside the...