oxidizing flame

neutral flame

carburizing flame

slightly carburizing flame

almost touch the work

be 10 mm away from the work

be 2 mm away from the work

be 5 mm away from the work

be more

of correct size

be less

not be affected

the metal will be cooled down

the kerf will be narrow

the kerf will be wide

cutting the metal will be failed completely

extremely slow cutting speed

insufficient acetylene pressure

the tip being hold too high

too much cutting oxygen pressure