Rinse station setup — confirm each setting, in order
55 PSI
115 °F
6 in
90°
🔒 Water is off until all four settings are confirmed.
Procedure: coarse spray · 38 PSI (40 max) · water 60–100 °F · nozzle ≈ 12 in from part · ≈ 45° to the surface, never perpendicular.
Remover station setup — confirm each setting, in order
35 %
8
🔒 The tank is closed until both settings are confirmed.
Procedure: hydrophilic remover 20% by volume (immersion range 10–30%) · air manifold set for slight bubbling only (2–4) · fresh-water rinse IMMEDIATELY after.
Forced-air dryer oven
180 °F
5:00
Procedure: oven at 140 °F · dry 5 minutes · verify the part reads below 150 °F before the dust chamber.
Indication measurements — under UV-A
Drag the ruler over each glowing indication. Measure tip-to-tip.
Practical Exercise · Liquid Penetrant Testing · Method D
Run a part through the hydrophilic remover line
Scope: process the welded plate through a Method D post-emulsifiable line: a water pre-rinse knocks down the bulk, then a hydrophilic (water-based) remover with gentle agitation takes the rest. Evaluate under UV-A.
How it works: the part hangs from an overhead carrier. Drag it along the rail to move between stations, and drag it down to lower it into a tank — you'll see it go under and come back out.
Stations, in order: water pre-wash · penetrant tank · drain rack (dwell) · pre-rinse booth · hydrophilic remover tank · fresh-water rinse under UV-A · forced-air dryer · dry-powder dust chamber · development rack · inspection booth.
Plain water can only take 60–80% of the surface penetrant — the remover does the rest, at the right concentration and with slight air bubbling only.
After the remover, a fresh-water rinse must follow immediately to stop its action.
The stations are set up at shift start, so the stop-rinse can follow the remover without delay.
Dwell times matter both ways: once a timer finishes, a red clock starts — don't let the part sit.
The part must be completely dry before the dust chamber — set the oven per procedure, run the cycle, then verify with the thermal gun.
Dwell timers are accelerated: 10 min runs in ~45 s. In the real shop you wait the full time.
Opens fullscreen for room to work — press Esc to exit.