I have come across a situation where a spacer has been installed inbetween 2 - 3" RFWM 150# flanges These spacers where made in a local machine shop The spacers where installed instead of reworking piping to reduce the gap inbetween flanges (spacer = 5.5" FTF) Are there any code requirements (ANSI/ASME) one must follow when biulding a spacer?
The same code requirements apply to the spacer as the original piping system code requirements, such as approved materials, welding qualifications, NDE, etc.