Newly constructed pipelines are pigged to remove construction debris such as welding rods, weld bead slag and mill scale, rust, as well as to remove hydrostatic water. Inline Services manufactures pipeline pigs designed for new pipeline construction, cleaning and commissioning, in addition to manufacturing pigs used for drying pipelines in preparation for introduction of hydrocarbon products.
We understand that not all pre-inspection pipeline cleaning needs are the same, so we carry a variety of solutions catered to specific cleaning requirements including:
- Low-Density Swab Pigs – dry pipelines and remove lite dust
- Foam Disc Pigs – remove hydro-static water and debris
- Wire Brush Pigs – achieves a high degree of pipeline cleanliness by removing debris that could trap moisture
- Gauging Pigs – confirms there are no restrictions in the pipeline for future running of cleaning and ILI pigs
Frequently Asked Questions
Why do newly constructed pipelines need to be cleaned before commissioning?
New pipelines accumulate welding rods, weld slag, mill scale, rust, and other construction debris during fabrication. Industrial pipeline cleaning removes this material so it does not damage valves, meters, and downstream equipment once the line is placed in service. Cleaning also confirms the pipeline is clear and ready for commissioning.
What debris does construction pipeline cleaning remove from a new pipeline?
The residue left after welding and fabrication includes welding rods, weld bead slag, mill scale, rust, dirt, and leftover hydrostatic test water. Thorough industrial pipeline cleaning removes these contaminants so they cannot degrade product quality or cause blockages once the pipeline is in operation.
Which pigs are used to clean a newly constructed pipeline?
Pipeline construction cleaning typically uses a progression of pigs. Bare foam pigs and mandrel pigs fitted with brushes or scraper cups dislodge mill scale and debris, while gauge pigs confirm the bore is free of dents and obstructions. Effective industrial pipeline cleaning depends on the right pig sequence, and Inline Services helps operators plan it for each project.
How is hydrostatic test water removed after pipeline construction?
After hydrostatic testing, pipelines are dewatered and dried to remove trapped water and moisture. Operators run displacement pigs, followed by drying methods such as air, nitrogen, or vacuum drying. Construction pipeline cleaning is not complete until this residual moisture is gone, since it can otherwise cause corrosion or hydrate formation.
How many cleaning runs does new pipeline construction cleaning require?
An industrial pipeline cleaning program is scaled to pipe diameter, length, and how much debris is present. Most projects need several passes, starting with aggressive cleaning pigs and finishing with gauge and drying runs. Inline Services can plan the full sequence for your specific line and commissioning schedule.
Get Expert Help With Your Pipeline Construction Cleaning Program
If you need assistance in developing the right cleaning program for your new pipeline construction project, we are here to help! Our knowledgeable staff can assist you in selecting the right types of pigs for your specific project.
Contact us today for more information or to request a quote!