API 11P requires that pulsation bottles (volume bottles) be designed per ASME Section VIII Division 1, but many fabricators use thin-wall pipe. The official PDF includes minimum wall thickness formulas that are often miscalculated.
The includes mandatory checklist templates for these tests.
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API 11P provides the "minimum requirements" for the design, fabrication, and assembly of complete compressor packages. It covers not only the compressor itself but also critical auxiliary systems: