exposed ferrous pipe threads with one coat of FS TT-P-645primer applied to
a minimum dry film thickness of 0.025 mm 1.0 mil.
Use Schedule 80 steel
pipe, hot-dipped galvanized for pipe nipples 150 mm 6 inches long and
shorter. Provide tapered-reducing pipe fittings for changes in piping
size; bushings will not be permitted. Minimum nominal pipe size for hose
and systems shall be 20 mm 0.75 inch.
3.2.3
Pipe Hangers and Supports
Provide additional supports for the concentrated loads in piping between
pipe hangers and supports, such as for valves. Support steel piping as
follows:
MAXIMUM SPACING (METERS)
__________________________________________________________________________
Nominal Pipe 25 and 32
40
50
65
80
100
125
150
Size (mm)
Under
__________________________________________________________________________
Steel Piping
2.13
2.44
2.75
3.05
3.35
3.66
4.27
4.57 5.18
__________________________________________________________________________
MAXIMUM SPACING (FEET)
__________________________________________________________________________
Nominal Pipe
1.0 and
1.25
1.5
2
2.5
3
4
5
6
Size (Inches)
Under
__________________________________________________________________________
Steel Piping
7
8
9
10
11
12
14
16
17
__________________________________________________________________________
3.3
FIELD PAINTING
**************************************************************************
NOTE: Coordinate Section 09900, "Paints and
Coatings" with this paragraph.
**************************************************************************
Clean, pretreat, prime, and paint new carbon dioxide fire extinguishing
systems including valves, piping, conduit, hangers, miscellaneous
metalwork, and accessories. Apply coatings to clean, dry surfaces, using
clean brushes. Clean surfaces to remove dust, dirt, rust, and loose mill
scale. Immediately after cleaning, provide metal surfaces with one coat of
FS TT-P-645 primer applied to a minimum dry film thickness of 0.025 mm 1.0
mil. Shield operating devices with protective covering while painting is
in process. Upon completion of painting, remove protective covering from
operating devices. Remove devices which are painted and replace with new
devices. Provide primed surfaces with the following:
3.3.1
Systems in Unfinished Areas
Unfinished areas are defined as attic spaces, mechanical rooms, spaces
above suspended ceilings, crawl spaces, pipe chases, and spaces where walls
or ceiling are not painted or not constructed of a prefinished material.
Provide primed surfaces with one coat of FS TT-E-489 red enamel applied to
a minimum dry film thickness of 0.025 mm 1.0 mil.
SECTION 13962N
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