p&id checklist
Post on 16-Apr-2015
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P & ID Check ListThe following shall be considered in P & ID Check List
-Verify revision, purpose of revisions, numbering, title.
-Verify notes reference drawings (including Removal P&IDs)
-Verify “holds” are indicated
-Verify piping spec break
-Verify line number, cross check with line schedule and sizing
-Verify all sizes are indicated and match the process calculations : control valves, relief valves, by pass…
-Verify limit of package, limit of supply
-Verify that all installation requirements are shown : no slope, high point, min. straight length, no pocket,
min. length, etc.
-Verify low temperature impact if expansion (control valve, relief valve, depressurization)
-Verify insulation requirement for piping, equipment and instruments are shown including pp/acoustic
-Verify proper valving for drain, relief valves
-Verify isolation of equipment (spectacle blind, double block and bleed) with job standard
-Verify consistency of double block and bleed
-Verify operability for start-up, opening of valve with high differential pressure especially riser valves
-Verify any by-pass requirements and appropriate valving
-Verify that working range of control valve is adequate or need of split-range
-Verify requirements of API 14C are fulfilled (safe chart) (for offshore projects)
-Verify all SP items are indicated
-Verify equipment, data and level diagrams are filled in and match the process calculations
-Verify piping, valve, equipment and instrument symbology and numbering. Verify symbology against
standard legend, symbols and instrument interface (if applicable)
-Have IDC been done.
-Have all design changes been included
-Have all changes clouded, previous ones removed
-Verify reference to other P&IDs and line continuity
-Are P&IDs properly signed
-Are all the set points indicated
-Have all other discipline comments been entertained
-Are all tie-in points shown and does the tie-in schedule revision agree with the P&IDs
-Do all equipment numbers and specs. Agree with process data sheets or specifications and Equipment list
-Verify all the nozzles of an equipment including drain, vent, manholes etc. have been shown
-Verify provisions for future expansion is kept, if the same is anticipated
-Are complete instrumentation and control loops shown on the P&IDs
-Verify if instrumentation details is as per job specification (isolation valve size and spec., vent & drain
requirements, etc.)
-Verify if failure position of shutdown and control valves are shown
-Verify if full bore valves are indicated
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