A logical solution to corrosion

Maintaining cased pipeline crossings

A corrosion problem area is cased pipeline crossings. Intended to protect pipelines from the weight of the road/traffic above and make repairs easier, they can become a breeding ground for corrosion. Pipeline casings are difficult to access and can trap water and debris that lead to corrosion. CorroLogic VpCI^® Filler is a patented solution designed for injection into such existing pipeline crossings. This two-part product turns into a gel that fills the annular void space around the carrier pipe and protects all sides from corrosion. The gel discourages the infiltration of air and water, and vapour phase corrosion inhibitors provide thorough protection by their ability to migrate under disbonded coatings and diffuse through void spaces not completely filled with the CorroLogic VpCI Filler gel. While many cased pipeline crossings remain at risk around the world, more and more cased crossings are being equipped with patented CorroLogic VpCI Filler as part of integrity management.

Void space protection

While CUI, ASTs, and cased pipeline crossings present key corrosion concerns, they do not diminish the importance of void space protection throughout the oil and gas industry. Large tanks and vessels beg for internal preservation during plant mothballing or short-term layup. Hundreds and thousands of pipeline segments frequently sit outside, unprotected in staging yards along the route of new pipeline construction. With CorroLogic Fogging Fluid VpCI-339, preservation is simple and comprehensive. This 100% vapour phase corrosion inhibitor can be misted into pipes or vessels which are then capped or closed to keep the protective vapours inside. These vapour phase corrosion inhibitors are attracted to the metal surfaces where they form a protective molecular layer that can easily last one to two years if undisturbed. This is an excellent alternative to nitrogen purge or nitrogen blanketing because it does not require special equipment to maintain constant pressure, is less expensive, and does not need to be reapplied if the void is temporarily opened. At the end of layup, the pipes and vessels can be used immediately, often with no need to remove the corrosion inhibitors. The same technology can be translated into protection of almost any void space that can be found on oil and gas premises.

Read the article online at: https://www.worldpipelines.com/product-news/04012023/a-logical-solution-to-corrosion/