API 609 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to API 609 — 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 609 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 609 (Butterfly Valves: Double-Flanged, Lug- and Wafer-Type); 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 609
- Category A: concentric design, resilient seats (EPDM, NBR, PTFE), maximum ASME Class 150
- Category B: offset disc, fire-safe per API 607, Class 150–600
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 609 / 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- Shell test: 1.5× rated pressure
- Seat leakage test: 1.1× rated pressure, Class A or D per API 598
- Torque measurement at rated differential pressure
- Fire test per API 607 if fire-safe designation
Primary hold point — witnessed shell, seat and backseat tests.
6. Fire-type test (qualification)
Hold- Fire test per API 607 / API 6FA with post-fire leakage acceptance
7. Marking, painting & preservation
Review- Nameplate & body marking verification
- Painting/coating DFT check, end protection and preservation
8. Final documentation
Hold- API 609 design conformance on data sheet
- Hydrostatic test certificate
- API 607 fire test certificate (for fire-safe valves)
- Material certificates (EN 10204 3.1)
Final documentation review before release/dispatch.
This is a typical ITP framework populated from API 609 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.
Connected Engineering
Need API 609 valves with a full ITP?
We supply API 609-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.