API 624 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to API 624 — inspection activities, tests, acceptance references and verifying documents, with recommended hold, witness and review points for QC and third-party inspection.
What is the ITP for API 624 valves?
An Inspection & Test Plan (ITP) sequences every check between raw material and dispatch, and assigns each an inspection level — Review (document check), Witness (inspector may attend), or Hold (work stops until released). The plan below is a typical ITP for valves built to API 624 (API 624 - Type Testing of Rising and Setting Stem Valves Equipped with Graphite Packing for Fugitive Emissions); the tests and documents are drawn directly from the standard's requirements. Use it to structure your QAP or coordinate third-party inspection.
1. Documentation & design review
Review- Approval of drawings, datasheets and QAP against API 624
- Complete valve assembly test (not just packing): 2-inch Class 600 gate or globe valve
- Test fluid: helium at 600 psig; temperature: ambient to 450°F (232°C) cycling
2. Raw material verification
Review- Material Test Reports (MTRs) review per EN 10204 3.1/3.2
- Positive Material Identification (PMI) of pressure-containing parts
3. Dimensional inspection
Witness- Dimensional check per API 624 / ASME B16.34 / applicable face-to-face
- Wall thickness verification
4. NDE (as applicable)
Witness- Visual, and RT/UT/MPI/DPT of castings/welds per specification
5. Pressure & performance testing
Hold- 1,500 thermal cycle helium leak test on complete valve assembly
- ISO 21049 or ASME B16.34 dimensional compliance verification
Primary hold point — witnessed shell, seat and backseat tests.
6. Marking, painting & preservation
Review- Nameplate & body marking verification
- Painting/coating DFT check, end protection and preservation
7. Final documentation
Hold- API 624 type test certificate for valve model
- Third-party witnessed test report
Final documentation review before release/dispatch.
This is a typical ITP framework populated from API 624 requirements, for reference. The actual hold/witness/review split is agreed per project between purchaser, manufacturer and the third-party inspection agency in the approved QAP. Confirm project-specific requirements before use.
Need API 624 valves with a full ITP?
We supply API 624-compliant valves with a project-specific ITP, in-house QC and third-party inspection (SGS, BV, TUV, DNV) coordination — hold and witness points accommodated. Get a 24-hour quote.