Modification of Pressure Fittings?

[marchjm]

Hi,
We plan to modify some standard pipe fittings by drilling holes through the wall of the fitting. One example is to drill and tap a 1/8"FNPT hole through the wall of a 1.5" to 1" reducer fitting.
What would be a good code for testing these modified fittings? I have looked through ASME B31.3 and found no section on modified fittings and testing criteria.
Thanks

 

[metengr]

Review ASME B31.3, Section 304.6.1 and especially 304.7.2.