NACE MR0103 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to NACE MR0103 — 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 NACE MR0103 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 NACE MR0103 (Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refinery Environments); 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 NACE MR0103
- Carbon steel hardness limit: ≤22 HRC (Rockwell C) for base metal and welds
- Heat treatment: PWHT (Post Weld Heat Treatment) required for carbon and low-alloy steel valves
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 NACE MR0103 / 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- Brinell or Rockwell hardness testing of body, bonnet, and trim
- PWHT verification by hardness test
- Traceability to heat treatment records
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- NACE MR0103 compliance certificate
- Hardness test report (all pressure-containing parts)
- PWHT records for carbon and alloy steel valves
- Material Test Reports (MTR) per EN 10204 3.1
Final documentation review before release/dispatch.
This is a typical ITP framework populated from NACE MR0103 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 NACE MR0103 valves with a full ITP?
We supply NACE MR0103-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.