helically corrugated flexible, single ply, seamless or seam-welded tubing
with one or more layers of stainless steel or bronze wire braid, or
reinforced TFE bellows or hose. Use manufacturer's recommended lengths and
sizes for the intended service.
2.1.3.6
Sleeves
Provide plastic waterproof cement seal or mechanically adjustable segmented
elastomeric seal. In Concrete and Masonry, use galvanized steel pipe,
ductile-iron, or cast-iron. For partitions, floors and roofs, other than
concrete or masonry, use 26-gage galvanized sheet steel.
2.1.3.7
Brazing Alloy
AWS A5.8, BCuP (Brazing-Copper-Phosphorus) series, greater than 538 degrees
C 1,000 degrees F melting temperature. Use only cadmium free brazing
filler. Do not use flux for copper-to-copper connections.
2.1.3.8
Soldering Alloys
ASTM B 32, Alloy Grade Sb5, Sn94, Sn95, or Sn96.
2.1.3.9
Welding Filler Metal
AWS A5.28 and compatible with the materials.
2.1.3.10
Threaded Joint Tape
TFE.
**************************************************************************
NOTE: Valve cabinets sometimes are called valve
boxes.
**************************************************************************
2.1.3.11
Valve Cabinets
[Stainless] [galvanized sheet steel] [or] [extruded aluminum],
flush-mounted, commercially available items with welded joints, and rigidly
assembled. Provide boxes of proper size to accommodate valve and fittings.
Punch or drill sides to receive tubing. Provide anchors to secure
cabinets to wall construction.
a.
Cover Plates: [Stainless steel] [aluminum] [or] [galvanized sheet
steel]. Provide covers with replaceable plastic windows with a
corrosion resistant device or lever, secured to cover for removal
of window in an emergency.
b.
Cabinet Labels: Each valve or valve cabinet shall be labeled for
substance and color coded as follows: "CAUTION (intended service)
TO (area served)." Color coding shall be the same as for the
adjoining pipe.
2.1.3.12
Buried Piping
**************************************************************************
NOTE: In areas where ground temperatures stay below
16 degrees C 60 degrees F, insulate and provide heat
trace for buried oxygen lines.
SECTION 15217N
Page 15
Previous Page
