http://www.pegasus-glass.com/pyrex.aspProvided borosilicate glass is not subjected to rapid change in temperature, creating undue thermal shock, it can be operated safely at temperatures up to 450°F (232°C). The normal limiting factor is actually the gasket material. The degree of thermal shock (usually defined as sudden chilling) which it can withstand depends on many factors, for example: stresses due to operating conditions; stresses imposed in supporting the equipment; the wall thickness of the glass, etc. It is therefore undesirable to give an overall figure but, as a general guide, sudden temperature changes of up to about 216°F (120°C) can be accommodated
Borosilicate will handle quite a change. In the lab, I go from boiling to very cold water and never lost one vessel yet. But I'm a little more cautious with the 5l erlenmeyer I paid forBobby_M said:My big question is how you cool the wort in the flask. You certainly can't go from boiling to cold water bath or CRACK!
I use a 2L flask on a ceramic top stove using the lowest heat possible to achieve a boil.scottaustin said:I am leaning more towards a pot at this point as this is my first starter and I would like to avoid broken/scarred glass.
My plan was to use a coil element stove and dunk the flask in a sink full of ice
olllllo you seem to know about this stuff, do you use a similar method/equipment?