AMPP SP21472-2026

Current Revision
Standard Practice for Internal Corrosion Mitigation for Hydrotesting & Wet Lay-Up of Onshore and Offshore Pipelines, Risers & Subsea Equipment

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AMPP SP21472, is the industry "rulebook" for ensuring that new energy pipelines are strong and leak-proof before they ever carry fuel. It primarily focuses on a process called hydrotesting, where engineers fill a pipe with water and pump it up to very high pressures to prove the metal doesn't have any hidden cracks or weak spots. This test serves as a final safety check that protects the environment by ensuring the pipeline can handle its future workload without bursting.

Beyond just testing, the standard also provides instructions for wet storage, which occurs when a pipeline is completed but must wait months or even years before it is fully connected and put into use. If plain water is left sitting inside a steel pipe for long periods, it can cause the metal to rust or allow bacteria to grow and eat away at the interior. SP21472 outlines exactly how to treat that water with specialized chemicals, such as corrosion inhibitors and biocides, to "pickle" and preserve the pipe’s interior. This keeps the infrastructure in perfect condition until it is time to turn on the flow, preventing future leaks caused by internal damage.
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