I-nitrogen ewuketshezi ivame ukugcinwa ngengcindezi ephansi, kepha ithangi lidinga ukukwazi ukumelana nengcindezi ethile yangaphakathi. Ingcindezi yokuqamba imvamisa ezungeze i-0.1 MPA (ibha ye-1), kepha inani elithile lincike ohlelweni lwangempela kanye nezidingo zokuphepha.