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A pipeline inspection gauge or cleaning pig in the pipeline industry is a tool that is sent down a pipeline and propelled by the pressure of the product in the pipeline itself. A cleaning pig is typically a soft, bullet shaped polyurethane plug that is forced through pipelines to clean them, separate products to reduce mixing, and inspect the pipeline. There are several types of pigs; some have tungsten studs or abrasive wire mesh on the outside to cut rust, calcium, or paraffin deposits off the inside of the pipe, others are plain plastic covered polyurethane. Inline inspection cleaning pigs use various methods for inspecting the condition of a pipeline. A sizing pig uses one (or more) notched round metal plates that are used as gauges. The notches allow different parts of the plate to bend when a bore restriction is encountered. More complex systems exist for inspecting various aspects of the pipeline. Certain cleaning pigs incorporate a computer or electronics which collects more information. These pigs use technologies such as mfl (magnetic flux leakage) and ultrasonics to detect the various aspects of the pipeline. 'intelligent' or 'smart' pigs may also use calipers to measure the inside geometry of the pipeline. They are the chief tool used in pipeline pigging. Pipeline pigging is the process of cleaning out of pipelines, between processes, with a special contoured plug or pig. The pig is driven down the pipeline by compressed gas, fluid or even product to give a clean line ready for reuse. A cleaning pig can be used either as a separator between two products, or as a method of cleaning out the pipeline at the end of a batch transfer. A major advantage of piggable systems is the saving in product which results. This process plays a significant role in reducing the environmental impact of batch operations and eliminates many basic problems faced by all.
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Featured Suppliers of Pipeline Pigs
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Hydro Resources Development Co.(p) Ltd. |
| Products Profile: |
Pipeline pigs, pigging systems, slickline eqpt etc |
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On-Line Trade Inquiry |
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Narmada Offshore |
| Products Profile: |
Foam, polyrethane pigs, launcher/reciver, pipeline accessories |
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On-Line Trade Inquiry |
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