3.2
15602-3
STEAM HEATING SYSTEMS
PIPING AND SPECIALTIES
be anchored where necessary to control expansion.
E. Install a sufficient number of unions for disassembling pipe around equipment of this
Division and other Divisions.
F. Install piping pitched for proper condensate drainage.
G. Install pipe hangers to properly support all equipment and piping. Maximum span
between hangers shall be 10 feet. Hangers shall be sized so insulation passes through
hangers.
H. Sleeves and Plates:
1. Pipes passing through masonry walls or floors shall have sleeves sized to
provide %4-inch minimum annular space, all insulation shall pass through
sleeves except where gas-tight calking is required.
2. All holes through concrete plank shall be drilled in such locations as not to
weaken plank structurally.
3. | Where exposed pipes pass through finished walls, floors, ceiling, etc. provide
and set split cover plates.
I. Provide adequate support for all heating equipment installed. Furnish and install any
required inserts, braces, hangers, miscellaneous steel, etc. as may be required for
installation.
J. Install dielectric unions at junction of pipes of dissimilar metals.
K. Install control measurement and valves in piping systems that are supplied by other
trades.
L. Provide unions to allow removal of all control valves.
TESTING AND BALANCING
A. Perform a hydrostatic pressure test on all piping and equipment.
B. Test pressure shall be 100 psi or 1-1/2 times the working pressure, whichever is
greater.
C. Repair, replace and rework as required to repair any defects and retest for approval.
D. All testing shall be performed prior to installation of insulation. Test systems in
sections as required to prevent delay of the project.
E. Operational Test: Upon completion of installation of all equipment and acceptance
of tests and balancing perform a 24-hour operational test in the presence of the
Engineers and Owner's representative to demonstrate proper operation of all functions
of the equipment and system.
13089K
