ASME B16.47 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to ASME B16.47 — 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 ASME B16.47 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 ASME B16.47 (Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard); 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 ASME B16.47
- Two non-interchangeable series: Series A (MSS SP-44 heritage) and Series B (API 605 heritage)
- Pressure classes covered: Class 75 (Series A only), 150, 300, 400, 600, 900
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 ASME B16.47 / 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- Dimensional inspection per ASME B16.47 Series A or B tables
- Hydrostatic shell test at 1.5× rated pressure for flanged valves
- PMI verification for alloy steel and stainless steel flanges
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- ASME B16.47 Series designation (A or B) on documentation and marking
- Pressure class marking on flange
- Material Test Reports (MTR) per EN 10204 3.1
- Dimensional inspection report confirming series and class compliance
Final documentation review before release/dispatch.
This is a typical ITP framework populated from ASME B16.47 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 ASME B16.47 valves with a full ITP?
We supply ASME B16.47-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.