Requirements for manufacturing flanges in shop for exchangers

[mechengr12]

Thanks in advance for any answers to my questions.
I have an exchanger with a machined flange that is used as a slip on with a groove for a split ring to connect the barrel of a hairpin exchanger. What requirements are there for a shop making this flange? Does it require a coded shop to make the flanges? The only requirements I can seem to find is that the flange must be made in accordance with B16.5 and marked per MSS SP-25. Does this mean that my in house shop can machine a pressure blind or plate of steel to make the necessary components?

 

[Afox88]

This flange would not fit the requirements of B16.5 which have very strict dimensions that this flange cannot meet.

BUT, you would be able to buy a plate/forged ring/disc and machine the flange yourself.