We don't have synonyms for safety tube yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are safety fuse and safety fuze.
(n) :
(chemistry) A tube to prevent explosion, or to control delivery of gases by an automatic valvular connection with the outer air; especially, a bent funnel tube with bulbs for adding those reagents which produce unpleasant fumes or violent effervescence.
(n) :
(chemistry) A tube to prevent explosion, or to control delivery of gases by an automatic valvular connection with the outer air; especially, a bent funnel tube with bulbs for adding those reagents which produce unpleasant fumes or violent effervescence.