3.1.5.6
Flanged joints shall be assembled square and tight with matched flanges,
gaskets, and bolts. Gaskets shall be suitable for use with the
refrigerants to be handled. When steel refrigerant piping is used, union
or flange joints shall be provided in each line immediately preceding the
connection to each piece of equipment requiring maintenance, such as
compressors, coils, refrigeration equipment, control valves, and other
similar items.
3.1.5.7
Flared Connections
When flared connections are used, a suitable lubricant shall be used
between the back of the flare and the nut in order to avoid tearing the
flare while tightening the nut.
3.1.6
Piping Supports
Refrigerant pipe supports shall conform to ASME B31.5. Hangers used to
support piping 50 mm 2 inches and larger shall be fabricated to permit
adequate adjustment after erection while still supporting the load. Pipe
guides and anchors shall be installed to keep pipes in accurate alignment,
to direct the expansion movement, and to prevent buckling, swaying, and
undue strain. Piping subjected to vertical movement, when operating
temperatures exceed ambient temperatures, shall be supported by variable
spring hangers and supports or by constant support hangers.
3.1.6.1
Seismic Requirements
**************************************************************************
NOTE: Provide seismic requirements for piping and
related equipment supports , if a Government
designer is the Engineer of Record, and show on the
drawings. Delete the inappropriate bracketed
phrase. Sections 13080 and 15070, properly edited,
must be included in the contract documents.
**************************************************************************
Piping and attached valves shall be supported and braced to resist seismic
loads [as specified in Sections 13080 SEISMIC PROTECTION FOR MISCELLANEOUS
EQUIPMENT] [as indicated]. Structural steel required for reinforcement to
properly support piping, headers, and equipment but not shown shall be
provided. Material used for support shall be as specified in Section 05120
STRUCTURAL STEEL.
3.1.6.2
Structural Attachments
Attachment to building structure concrete and masonry shall be by
cast-in-concrete inserts, built-in anchors, or masonry anchor devices.
Inserts and anchors shall be applied with a safety factor not less than 5.
Supports shall not be attached to metal decking. Masonry anchors for
overhead applications shall be constructed of ferrous materials only.
Material used for support shall be as specified in Section 05120 STRUCTURAL
STEEL.
3.1.7
Pipe Hangers, Inserts, and Supports
Pipe hangers, inserts, and supports shall conform to MSS SP-58 and MSS SP-69,
except as modified herein. Pipe hanger types 5, 12, and 26 shall not be
SECTION 15652A
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