substitution request - Alliance Construction Solutions

1. Flexible couplings may be used in lieu of flexible connectors for vibration isolation
at equipment connections. Three couplings, for each connector, shall be placed in
close proximity to the source of vibration.
Project No.: 10145
550 15th Street Dual Brand Hotel
03/16/2012
a) 2” through 8”: Installation Ready, stab-on design, for direct ‘stab’ installation
onto grooved end pipe without prior field disassembly and no loose parts.
Grade “EHP” EPDM gasket suitable for hot water up to 250 deg F. Victaulic
Style 177 QuickVic.
D. Rigid Coupling Housings Description: Grooved mechanical type, which engages grooved
pipe ends, encasing an elastomeric gasket which bridges pipe ends to create seal. Cast in
two parts with angled mating pads which grip the pipe rigidly and force the pipe ends to
their maximum separation. Secured together during assembly with nuts and bolts.
1. Rigid couplings may be used in lieu of flexible connectors for vibration isolation at
equipment connections. Three couplings, for each connector, shall be placed in
close proximity to the source of vibration.
a) 2” through 8”: Installation Ready, stab-on design, for direct ‘stab’ installation
onto grooved end pipe without prior field disassembly and no loose parts.
Grade “EHP” EPDM gasket suitable for hot water up to 250 deg F. Victaulic
Style 107H QuickVic.
E. Copper-Tube Couplings, 2” through 8”: Installation Ready, stab-on design for direct
‘stab’ installation onto roll grooved copper tube without prior field disassembly and no
loose parts. Housings shall be ASTM A536 ductile iron cast with offsetting, angle-pattern
bolt pads coated with copper-colored enamel, Grade “EHP” EPDM gasket suitable for hot
water up to 250 deg F, and plated steel bolts and nuts. Victaulic Style 607 QuickVic.
F. Stainless Steel Pipe Couplings 2-1/2” to 12”: Two or more segments of cast stainless steel
conforming to ASTM A351, A743, and A744. Gaskets shall be Grade “E” EPDM suitable
for hot water up to 230 deg F, and stainless steel bolts and nuts, Type 316, conforming to
ASTM A193, Grade B8M, Class 2.
1. Rigid Type: Housings cast with key designed to clamp the bottom of the groove to
provide an essentially rigid joint. Victaulic Style 489.
2. Flexible Type: Use in seismic areas and locations where vibration attenuation and
stress relief are required. Victaulic Style 77S.
G. Gaskets: Mechanical grooved coupling design, pressure-responsive so that internal
pressure serves to increase seal's tightness, constructed of elastomers having properties as
designated by ASTM D-2000.
1. Water Services: EDPM Grade E, with green color code identification or Grade
EHP, with red color code identification.
2. Other Services: As recommended by Manufacturer.
H. Bolts and Nuts: Heat-treated carbon steel, ASTM A-183 and A-449, minimum tensile
strength of 110,000 psi. Provide tamper-resistant nuts in exposed locations.
I. Branch Fittings: Similar to coupling, with full circumference gasket and integral branch
outlet in both the housing and gasket.
J. Fittings: Grooved end design to accept grooved mechanical couplings.
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