AWWA C504 Inspection & Test Plan (ITP)
A typical stage-wise ITP / quality plan for valves supplied to AWWA C504 — 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 AWWA C504 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 AWWA C504 (Rubber-Seated Butterfly Valves, 3 In. Through 72 In. (76 mm through 1,800 mm)); 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 AWWA C504
- Body material: ductile iron ASTM A536 Grade 65-45-12, or grey iron ASTM A126 Class B for lower pressure
- Disc material: ductile iron ASTM A536 with rubber or stainless-overlay seat contact face
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 AWWA C504 / 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- Hydrostatic shell test: 1.5× rated working pressure, 2 minutes, zero visible leakage
- Disc seat test: 1.1× rated pressure each direction, 2 minutes, zero visible leakage
- Actuator torque test: torque measured at maximum differential pressure before seal test
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- NSF/ANSI 61 compliance certificate for rubber seat and body coating in potable water contact
- Manufacturer's hydrostatic test certificate with pressure class and test pressures
- Dimensional inspection report per AWWA C504 Table 3 (flange face OD, BFV face-to-face)
- Actuator torque curve and gear ratio documentation
Final documentation review before release/dispatch.
This is a typical ITP framework populated from AWWA C504 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 AWWA C504 valves with a full ITP?
We supply AWWA C504-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.