substitution request - Alliance Construction Solutions

A. Hangers for single pipes shall be adjustable clevis hangers, zinc-plated for steel pipes and
copper-plated for copper pipes. Hangers for insulated pipes shall be oversized to
accommodate pipe insulation thickness.
B. Install hangers, supports, clamps and attachments to support piping properly from
building structure; comply with MSS SP-69 and SP-89. Arrange for grouping of parallel
runs of horizontal piping to be supported together on field-fabricated, heavy-duty trapeze
hangers where possible. Install supports with maximum spacings complying with MSS SP-
69. Where piping of various sizes is supported together by trapeze hangers, space
hangers for smallest pipe size or install intermediate supports for smaller diameter pipe.
Do not use wire or perforated metal to support piping, and do not support piping from
other piping.
C. Install hangers and supports complete with all necessary inserts, bolts, rods, nuts, washers
and other accessories.
D. Provide electrolysis isolators at all hangers and supports for domestic water, condenser
water, and other water lines which are not insulated.
E. Prevent electrolysis and abrasion in support of copper tubing by use of hangers and
supports which are plastic coated, or with EPDM isolation strips. Duct tape or copper
coated hangers are not acceptable.
F. Support fire water piping independently from other piping systems.
G. Install hangers and supports to allow for controlled movement of piping systems, to permit
freedom of movement between pipe anchors, and to facilitate action of expansion joints,
expansion loops, expansion bends and similar units. Install hangers and supports within
1’– 0” of each horizontal elbow.
H. Load Distribution: Install hangers and supports so that piping live and dead loading and
stresses from movement will not be transmitted to connected equipment.
I. Provide vibration isolators on the first three supports upstream and downstream of
equipment equipped with flexible connectors such as pumps, chillers, cooling towers, etc.
J. Pipe Sloping: Install hangers and supports to provide indicated pipe sloping, and so that
maximum pipe deflections allowed by ANSI B31.9 Building Services Piping Code are not
exceeded.
K. Insulated Piping: Comply with the following installation requirements:
1. Clamps: Attach clamps, including spacers (if any), to piping with clamps
projecting through insulation; do not exceed pipe stresses allowed by ANSI B31.
2. Saddles: Install protection saddles, MSS Type 39, where supported by pipe rollers.
Fill interior voids with segments of insulation that match adjoining pipe insulation.
3. Shields:
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
a. Install galvanized steel 180° insulation protection shields on all insulated
piping of sizes 2” and smaller, except where required to be clamped.
Where necessary to prevent dislocation, strap shield to pipe with wire ties
or "Zip Strips." Insulation shall be continuous through hanger.
b. Insulation lengths and galvanized steel saddle lengths and gauges
(minimums) shall comply with Table 1 below. Where pipe hanger spacing
22 0529 - 7 HANGERS AND SUPPORTS FOR
PLUMBING PIPING AND
EQUIPMENT