On August 31, 2005, the ANSI Board of Standard Review (BSR) approved Addendum No. 3 to the Guide for Gas Transmission and Distribution Piping Systems - 2003 Edition. Addendum No. 3 contains 88 pages and is formatted to enable direct replacement of pages in your copy of the 2003 edition (when printed double-sided). The addendum includes all revised federal regulations and new guide material developed since Addendum No. 2 was released in July 2005. To download your copy, go to Addendum No. 3 below under "Related Files".
Purchasers of the 2003 edition will automatically receive a paper copy of Addendum No. 3. Click here to purchase your copy of the 2003 Guide.