Aboveground heat distribution system should
be considered for use in lieu of underground heat
distribution systems due generally to longer life
and lower maintenance and should be utilized
wherever operations and local conditions permit.
Due to the similarity of a high temperature hot
water system and a steam system, no attempt was made
to enclose in brackets all information which may
differentiate one system from the other. In the
event that only one type of distribution system is
required this guide specification must be edited to ensure that all information not applicable to the
design is deleted. This may require that some
paragraphs be deleted and others renumbered.
The Contract drawings will provide the following
information on the aboveground heat distribution
system as applicable: (1) dimensions on all runs of
pipe; (2) elevation of the pipe along the systems
path; (3) sizes of pipes; (4) system operating
temperature and pressure; (5)types of check valves
used; (6) cold set dimensions of expansion loops and
Z-and L-bends; (7) how changes in pipe direction are
to be made; (8) any changes in pipe pitch from the
usual 20 mm per 10 m (1 inch per 40 feet); (9)
aboveground heat distribution system support and
pipe support spacing, locations and details; and
(10) other pertinent information and details
required to clearly show the intent of the
aboveground heat distribution system. Also indicate
any obstructions in the path of the aboveground heat
distribution system the Contractor may have to work
around.