Aia nā palena pahū o Acetylene ma waena 2.5% a 80%, e hōʻike ana e hiki ke pahū i ka wā i loko o kēia mau palena. Ma waho aʻe o kēia paepae, ʻaʻole e alakaʻi ka ʻā i ka pahū.
Ma ka kikoʻī, ʻoi aku ka nui o ka acetylene 80% a i ʻole ma lalo 2.5% ʻaʻole e hopena i kahi pahū, ʻoiai me kahi kumu hoʻā.