flash welding flash valve • flash wheel · · · Info · Definitions · Synonyms · Characters · · flash welding · · Text Common · · Latin · · Scripts 13 · · Length 3 · · Syllables Definitions · · · (noun) butt welding by creating an electric arc between the two pieces which melts and joins them; used for joining segments of metal pipe. Synonyms: flash welding, flash butt welding. · · Noun Definition 1 Synonyms · · · flash butt welding · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 w latin small letter w U+0077