vegetable fiber, rubber, or rubber inserted gaskets for temperatures
greater than 121 degrees C 250 degrees F. Provide metal or metal jacketed
asbestos gaskets with small male and female and small tongue-and-groove
flanges and flanged fittings; they may be used with steel flanges with
lapped, large male and female, large tongue-and-groove, and raised facings.
Provide full face gaskets with flat-faced flanges. Raised face cast iron
flanges, lapped steel flanges, and raised faced steel flanges shall have
ring gaskets with an outside diameter extending to the inside of the bolt
holes. Widths of gaskets for small male and female and for
tongue-and-groove joints shall be equal to the widths of the male face and
tongue. Gaskets shall have an inside diameter equal to or larger than the
port opening. Dimensions for nonmetallic gaskets shall be in accordance
with ASME B16.21. Materials for flanged gaskets shall be as listed below
for service specified:
a.
Steam, boiler blowdown, exhaust steam:
Spiral wound metal
composition or copper
b.
Boiler feed water:
Metal jacketed asbestos, copper or monel
c.
Hot water, above 38 degrees C 100 degrees F:
Spiral wound metal
asbestos
d.
Cold water:
Red rubber or neoprene rubber
e.
Heavy fuel oil (No. 6):
Spiral wound metal asbestos, soft steel,
or monel
f.
Diesel fuel (No. 2):
ASME B16.21 metallic
g.
Compressed air:
Spiral wound metal asbestos
2.15.1.7
Expansion Joints
a.
Slip tube expansion joints: MIL-E-17814, Type IV, single or
double slip tube as indicated, designed for [1034] [2068] kPa
(gage) [150] [300] psig saturated steam working pressure.
Expansion joints shall be of the type which permits the injection
of semi plastic type packing while the joint is in service under
full line pressure. Slip tube shall be of chromium plated,
wrought steel construction, guided by internal and external guides
integral with joint body. Fit slip tube ends with forged steel
pipe flanges or bevel for welding into pipe line where indicated.
Deliver joints complete with packing and ready for installation.
b.
Flexible ball expansion joint: Capable of 360 degrees rotation
plus 15 degrees angular flex movement and shall be installed in
strict accordance with recommendations of the manufacturer. Ball
joints shall have steel bodies and polished steel balls. Provide
end connections to suit class of piping herein before specified.
Seals shall be of pressure molded composition designed for the
working pressure. Design joints for [1034] [2068] kPa (gage)
[150] [300] psig saturated steam working pressure. Cold set
joints as necessary to compensate for temperature at time of
installation. Do not use ball joints on superheated steam or on
joints subject to frequent flexure.
c.
Bellows expansion joints: MIL-E-17813 flexible guided type with
stainless steel expansion element, internal sleeves and external
SECTION 15502N
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