No, just ignore it.
Wait a minute though, it's connected to a big vessel. If the standpipe fails you will be mopping up the vessel contents way past home-time.
But really, ANY pipe should be properly supported and restrained such that it is not over-stressed. If that needs a stress calc then do it.
Whilst simple instrument bridles are often self-supporting, some instruments are very heavy and require decent supports for standpipes and attachments.