METHOD TO CHECK UP WELDED PRODUCTS FOR TIGHTNESS AND TEST BENCH TO THIS END Russian patent published in 2010 - IPC G01M3/06 

FIELD: test equipment.

SUBSTANCE: invention relates to test equipment and can be used for checking welded products with inner intercommunicated channels, for examples transformer housings with corrugated walls for leaks. Product is closed by tight cover, immersed in tank filled with fluid and gas with surplus pressure is forced into inner channels and product cavities. Product is held at pressure to reveal leaky points by escaping gas bubbles. Note here that, in compliance with this invention, product is immersed into fluid by its every sidewall in turns unless welded seam of immersed sidewall is completely immersed into fluid. Gas bubbles appear, tested sidewall is turned to be taken out from the fluid unless bubbles leaking from defect point disappear, leaky point is marked and said procedure is repeated for another sidewall. Similar procedure is repeated for third and fourth sidewalls.

EFFECT: simplified test procedure higher accuracy of leak test.

2 cl, 2 dwg