| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. TEST PREPARATION & SETUP | |||
| A1 | All pipe joints and connections fully completed and cured (solvent welds aged minimum 2 hours at 20°C) Acceptance: Cure time documented, solvent joint color uniform indicating full cure, visual inspection passed | Cl. 13.1 — Joint readiness | OK NC NA HOLD |
| A2 | System is isolated; all open ends capped and sealed securely Acceptance: Caps bolted/welded securely, pressure-tested separately before main system test, no leakage at caps | Cl. 13.2 — End sealing | OK NC NA HOLD |
| A3 | Air vent points identified and opened; drain/sump point identified for evacuation after test Acceptance: Vent locations marked on drawing, drain sump prepared, drain valve operational | Cl. 13.3 — Venting strategy | OK NC NA HOLD |
| A4 | Pressure gauge (0-2.5 bar range minimum, accuracy ±2%) connected at lowest point of system Acceptance: Gauge calibrated within 12 months, range adequate for test pressure, mounted at low point | Cl. 13.4 — Pressure measurement | OK NC NA HOLD |
| B. PRESSURE BUILD-UP & STABILIZATION | |||
| B1 | Pressure increased in increments (0.2-0.3 bar every minute); no sudden pressure jumps Acceptance: Pressure gauge reading every minute recorded, pressure increase gradual (no spikes), pump operated smoothly | Cl. 13.5 — Gradual pressurization | OK NC NA HOLD |
| B2 | System stabilized at test pressure (1.5 × design) for 5-10 minutes before measuring leakage Acceptance: Test pressure held steady for 10 minutes, pressure fluctuation ≤0.1 bar, gauge stable reading | Cl. 13.6 — Pressure stabilization | OK NC NA HOLD |
| B3 | Initial system pressure recorded when stabilized; all leakage monitored from this baseline Acceptance: Initial pressure recorded with time stamp, baseline pressure verified by second observer, documented | Cl. 13.7 — Baseline recording | OK NC NA HOLD |
| C. LEAKAGE MONITORING & ACCEPTANCE | |||
| C1 | Pressure drop monitored for 30 minutes at test pressure; allowable leakage ≤0.5 bar drop (per 100 m pipeline) Acceptance: Pressure readings taken every 5 minutes, drop ≤0.5 bar over 30 minutes recorded, table of readings prepared | Cl. 13.8 — Leakage limit | OK NC NA HOLD |
| C2 | Visible leakage at any joint: ZERO seepage observed; water droplets or streams indicate failure Acceptance: System visually inspected throughout test duration, all joints observed dry, no moisture or seepage noted | Cl. 13.9 — Visual inspection | OK NC NA HOLD |
| C3 | If pressure drop exceeds 0.5 bar in 30 minutes: system FAILS test; fault location identified and repaired Acceptance: If failed: depressurize system, locate leak (usually visible seeping), repair joint/connection, re-test | Cl. 13.10 — Failure procedure | OK NC NA HOLD |
| C4 | System PASSES test if pressure drop ≤0.5 bar and zero visible leakage; test certificate issued Acceptance: Pass verdict recorded, test certificate prepared and signed by QC engineer, system approved for service | Cl. 13.11 — Acceptance | OK NC NA HOLD |