Just a Sparky
Hot Rolled
- Joined
- May 2, 2020
- Location
- Minnesota
I'm working up a bill of parts for a compressor discharge manifold. One of the unknowns I have is whether it is a safe and acceptable practice to drill and tap the wall of schedule 40/80 black steel pipe.
For context, this is a 1-1/4" pipe that will see a 100 PSI working pressure, 125-150 PSI pop-off. It would be getting 1/4", 3/8" and 1/2" NPT holes for pressure switch, relief valve, pilot valve, pressure gauge, etc. I could nipple a whole bunch of reducing tees together but that translates to added expense and screwing around in the form of trying to get all four to tighten up in the same orientation.
I can't find any engineering literature either in support of or opposition to this practice. Anyone in the know around here happen to have an authoritative 'go' or 'no-go' handy for this idea?
For context, this is a 1-1/4" pipe that will see a 100 PSI working pressure, 125-150 PSI pop-off. It would be getting 1/4", 3/8" and 1/2" NPT holes for pressure switch, relief valve, pilot valve, pressure gauge, etc. I could nipple a whole bunch of reducing tees together but that translates to added expense and screwing around in the form of trying to get all four to tighten up in the same orientation.
I can't find any engineering literature either in support of or opposition to this practice. Anyone in the know around here happen to have an authoritative 'go' or 'no-go' handy for this idea?