What about spec'ing orifice flanges?
B16.5 is to MSS SP-44
as B16.36 is to .... ?
In other words,
B16.36 refers back to B16.5 for materials, but what is the best/easiest way to specify orifice flanges to go with the higher grade pipe?
For regular non-orifice flanges, MSS SP-44 provides a way...