Originally Posted by Michael in FtW
Logic would suggest that the problem was uneven heating or cooling
agreed, it even happens to Lab glassware too, that`s why even with Pyrex or Borosilicate ware, there are special diffuser adaptors to go on the bunsens (or we use a hot plate and a liquid medium to transfer heat.
it can be quite scary when you have a volatile liquid heating and you start to hear that tinkling or pinking sound!
uneven heating is a killer for glassware, and of course with 2 heat sources you have 2 areas of expansion and a middle area under twice the pressure now.
Sorry to hear it Bro! and of course being Glass you can`t take any risks you have to deep 6 the whole lot