Without impact testing other than that required by material specification, you can if you keep stress ratio within 0.3 upper limit, otherwise with impact testing of base metal and weld metal deposits - as I understood by reading 2002 Ed of code B 31.3 for A312 316L. To be sure please consult any cryogenic piping vendor that structure change from FCC to BCC should not occur within your temperature of application.

regards,
sam

For Haider,

Why don't you SS flexhose instead of changing piping layout, with that, you may find it easy to keep stress ratio within 0.3.