Minimum butt weld joints distance for piping

[carlomaderazo]

Hi Everybody,
Where can i find in ASME standards the minimum girth butt joint to girth butt joint distance for piping?

 

[metengr]

There are no requirements in any of the ASME standards regarding your question. You need to use good engineering practice - do not overlap weld heat affected zones and make sure the welds are far enough apart so that any NDT that is performed will not be effected by an adjacent butt weld.