Hello,

By the way, although it is slightly off topic you might want to look at this Standard:

SP-97-1995, $35.00
Integrally Reinforced Forged Branch Outley Fittings -- Socket Welding, Threaded and Buttwelding Ends

This MSS Standard Practice covers essential dimensions, finish, tolerances, testing, marking, material and minimum strength requirements for 90 degree integrally reinforced forged branch outlet fittings of buttwelding, socket welding and threaded types.

Go to this site:

http://www.normas.com/cgi-bin/search/search.cgi?q=fitting&Submit=go%21

Regards, John