functioning and servicing of the systems. Valves shall be safely
accessible. Swing check valves shall be installed upright in horizontal
lines and in vertical lines only when flow is in the upward direction.
Gate and globe valves shall be installed with stems horizontal or above.
Valves to be brazed shall be disassembled prior to brazing and all packing
removed. After brazing, the valves shall be allowed to cool before
reassembling.
3.2.17
Pipe Sleeves
Pipe passing through concrete or masonry walls or concrete floors or roofs
shall be provided with pipe sleeves fitted into place at the time of
construction. A waterproofing clamping flange shall be installed as
indicated where membranes are involved. Sleeves shall not be installed in
structural members except where indicated or approved. Rectangular and
square openings shall be as detailed. Each sleeve shall extend through its
respective wall, floor, or roof. Sleeves through walls shall be cut flush
with wall surface. Sleeves through floors shall [be cut flush with floor
surface] [extend above top surface of floor a sufficient distance to allow
proper flashing or finishing]. Sleeves through roofs shall extend above
the top surface of roof at least 150 mm 6 inches for proper flashing or
finishing. Unless otherwise indicated, sleeves shall be sized to provide a
minimum clearance of 6 mm 1/4 inch between bare pipe and sleeves or between
jacket over insulation and sleeves. Sleeves in waterproofing membrane
floors, bearing walls, and wet areas shall be galvanized steel pipe or
cast-iron pipe. Sleeves in nonbearing walls, floors, or ceilings may be
galvanized steel pipe, cast-iron pipe, or galvanized sheet metal with
lock-type longitudinal seam. Except in pipe chases or interior walls, the
annular space between pipe and sleeve or between jacket over insulation and
sleeve in nonfire rated walls shall be sealed as indicated and specified in
Section 07920 JOINT SEALANTS. Metal jackets shall be provided over
insulation passing through exterior walls, firewalls, fire partitions,
floors, or roofs.
a.
Metal jackets shall not be thinner than 0.1524 mm 0.006 inch thick
aluminum, if corrugated, and 0.4 mm 0.016 inch thick aluminum, if
smooth.
b.
Metal jackets shall be secured with aluminum or stainless steel
bands not less than 9 mm 3/8 inch wide and not more than 200 mm 8
inches apart. When penetrating roofs and before fitting the metal
jacket into place, a 15 mm 1/2 inch wide strip of sealant shall be
run vertically along the inside of the longitudinal joint of the
metal jacket from a point below the backup material to a minimum
height of 1000 mm 36 inches above the roof. If the pipe turns
from vertical to horizontal, the sealant strip shall be run to a
point just beyond the first elbow. When penetrating waterproofing
membrane for floors, the metal jacket shall extend from a point
below the back-up material to a minimum distance of 50 mm 2 inches
above the flashing. For other areas, the metal jacket shall
extend from a point below the backup material to a point 300 mm 12
inches above material to a minimum distance of 50 mm 2 inches
above the flashing. For other areas, the metal jacket shall
extend from a point below the backup material to a point 300 mm 12
inches above the floor; when passing through walls above grade,
the jacket shall extend at least 100 mm 4 inches beyond each side
of the wall.
SECTION 15569A
Page 69
Previous Page
