P.Manivannan,
Welcome to the discussion forum.
I assume you are using an ASME B31 code. The simple answer to your question is the codes do not deal with crosses. For further information click on "search" above (immediately below the New Topic and Post buttons). Search on the word "Cross." The topic entitled "Cross Tees" has a very clear answer to your question from forum moderator, Richard Ay.
Regards,
_________________________
Ricardo