What is the purpose of pipeline purging?

Pipeline purging mainly involves removing impurities, slag, and dirt from within the pipes, in order to prevent these substances from affecting the proper operation of the equipment connected to the pipes.

Pipe purging is mainly carried out during maintenance or new construction； The purpose is to blow out any construction debris inside the pipeline, thereby preventing such debris from damaging the equipment or contaminating the product quality.

If dangerous substances such as gas flow through the pipeline, the purpose of pipeline purging is not only to remove any impurities resulting from construction processes from within the pipeline, in order to prevent these impurities from damaging equipment or contaminating the quality of the product； Oxygen also needs to be blown away to ensure system safety.

Piping purging is mainly used to clean the inside of the pipelines.

Pipeline purging is primarily used to remove impurities from within the pipes, preventing equipment blockages.

After the pipeline is welded, it needs to be pressure-tested; after the pressure testing, it must be purged, and a gas-tightness test is required afterward. The purpose of purging before airtightness testing is to remove rust and slag from inside the pipes, thereby cleaning the pipe interiors. Sometimes, after pressure testing, it is also necessary to purge the system in order to remove any remaining water inside. In some pipelines, a high level of cleanliness is required; for example, in the lubrication pipelines of machinery units, acid washing and passivation are needed before purging. When purging pipelines, it needs to be carried out in accordance with the pipeline system; a purge plan should be prepared in advance to determine the inlet and outlet for purification. Purging is not done while the equipment is in use. Steam or air is commonly used for purification, so there’s no need to worry that water will flow into the equipment and affect the materials inside it. If it is for maintenance, any materials inside the equipment need to be isolated, and generally, materials are not allowed to be present.

In simple terms, it involves removing residues and dust particles remaining inside the pipes

It seems that using water for purging has an impact

Air purging and water flushing are two different things; after flushing the pipes with water, they need to be dried, and there are PPM requirements for drying

It is mainly used to remove debris from within the pipes, ensuring that there are no such debris that could affect their operation.