3.1.13.4
Angle Attachments
Type 20 attachments used on angles and channels shall be furnished with an
added malleable-iron heel plate or adapter.
3.1.13.5
Saddles and Shields
Where Type 39 saddle or Type 40 shield are permitted for a particular pipe
attachment application, the Type 39 saddle, connected to the pipe, shall be
used on all pipe 100 mm (4 inches) 4 inches and larger when the temperature
of the medium is 16 degrees C 60 degrees F or higher. Type 40 shields
shall be used on all piping less than 100 mm (4 inches) 4 inches and all
piping 100 mm (4 inches) 4 inches and larger carrying medium less than 16
degrees C 60 degrees F. A high density insulation insert of cellular glass
shall be used under the Type 40 shield for piping 50 mm (2 inches) 2 inches
and larger.
3.1.13.6
Horizontal Pipe Supports
Horizontal pipe supports shall be spaced as specified in MSS SP-69 and a
support shall be installed not over 300 mm 1 foot from the pipe fitting
joint at each change in direction of the piping. Pipe supports shall be
spaced not over 1.5 m 5 feet apart at valves. [Pipe hanger loads suspended
from steel joist with hanger loads between panel points in excess of 23 kg
50 pounds shall have the excess hanger loads suspended from panel points.]
3.1.13.7
Vertical Pipe Supports
Vertical pipe shall be supported at each floor, except at slab-on-grade,
and at intervals of not more than 4.5 m, 15 feet, not more than 2.4 m 8 feet
from end of risers, and at vent terminations.
3.1.13.8
Pipe Guides
Type 35 guides using, steel, reinforced polytetrafluoroethylene (PTFE) or
graphite slides shall be provided where required to allow longitudinal pipe
movement. Lateral restraints shall be provided as required. Slide
materials shall be suitable for the system operating temperatures,
atmospheric conditions, and bearing loads encountered.
3.1.13.9
Steel Slides
Where steel slides do not require provisions for restraint of lateral
movement, an alternate guide method may be used. On piping 100 mm (4
inches) 4 inches and larger, a Type 39 saddle shall be used. On piping
under 100 mm (4 inches), 4 inches, a Type 40 protection shield may be
attached to the pipe or insulation and freely rest on a steel slide plate.
3.1.13.10
High Temperature Guides with Cradles
Where there are high system temperatures and welding to piping is not
desirable, then the Type 35 guide shall include a pipe cradle, welded to
the guide structure and strapped securely to the pipe. The pipe shall be
separated from the slide material by at least 100 mm, 4 inches, or by an
amount adequate for the insulation, whichever is greater.
3.1.13.11
Multiple Pipe Runs
In the support of multiple pipe runs on a common base member, a clip or
SECTION 15182
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