BS 5351 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to BS 5351 — 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 BS 5351 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 BS 5351 (Steel Ball Valves for Petroleum, Petrochemical and Allied Industries); 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 BS 5351
- Full-bore (full-port) bore diameter shall equal nominal pipe bore
- Reduced-bore minimum port area: not less than 70% of full-bore area
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 BS 5351 / 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, 15 minutes minimum, zero leakage
- Seat leakage test: 1.1× rated pressure per API 598 or ISO 5208 acceptance criteria
- Anti-static continuity test: electrical resistance ≤10 ohms across stem-ball-body
- Fire-safe test per BS 6755 Part 2 / ISO 10497 when specified
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- BS 5351 compliance certificate
- Shell and seat pressure test certificates
- Material Test Reports (MTR) 3.1 per EN 10204
- Positive material identification (PMI) report
Final documentation review before release/dispatch.
This is a typical ITP framework populated from BS 5351 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 BS 5351 valves with a full ITP?
We supply BS 5351-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.