API 17D Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to API 17D — 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 17D 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 17D (Design and Operation of Subsea Production Systems - Subsea Wellhead and Tree Equipment); 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 17D
- Product Specification Level (PSL) 3 or 4 mandatory for all subsea wellhead and tree components
- Working pressure ratings: 3000, 5000, 10000, and 15000 psi (aligned with API 6A classes)
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 17D / 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- Factory acceptance test (FAT): full hydrostatic test at 1.5× rated working pressure
- Seat test at rated working pressure from both upstream and downstream
- Low-pressure gas test at 50–100 psi for seat integrity check
- Full functional cycling under rated pressure (minimum cycle count per PSL level)
- System integration test (SIT): assembled tree tested with running tools and ROV override
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 17D / ISO 13628-4 compliance certificate
- PSL 3 or 4 qualification documentation package
- Full material traceability records (EN 10204 3.1 or 3.2 MTRs)
- Third-party inspection certificate from API-qualified inspection body
- Factory acceptance test report with witnessed pressure curves
- NACE MR0175 / ISO 15156 compliance certificate for sour service components
Final documentation review before release/dispatch.
This is a typical ITP framework populated from API 17D 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 17D valves with a full ITP?
We supply API 17D-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.