surfaces shall be chromium plated or fabricated of corrosion resistant
steel. Initial setting shall be made in accordance with the manufacturer's
recommendations to compensate for an ambient temperature at time of
installation. Pipe alignment guides shall be installed as recommended by
the joint manufacturer, but in any case shall not be more than 1.5 m 5 feet
from expansion joint, except in lines 100 mm 4 inches or smaller guides
shall be installed not more than 600 mm 2 feet from the joint. Service
outlets shall be provided where indicated.
a.
Bellows-type joints shall be flexible, guided expansion joints.
The expansion element shall be stabilized corrosion resistant
steel. Bellows-type expansion joints shall conform to the
applicable requirements of EJMA Stds and ASME B31.1 with internal
lines. Guiding of piping on both sides of expansion joint shall
be in accordance with the published recommendations of the
manufacturer of the expansion joint. The joints shall be designed
for the working temperature and pressure suitable for the
application but shall not be less than 1135 kPa 150 psig.
b.
Flexible ball joints shall be constructed of alloys as appropriate
for the service intended. The joints shall be threaded, grooved,
flanged, or welded end as required and shall be capable of
absorbing the normal operating axial, lateral, or angular
movements or combination thereof. Balls and sockets shall be
polished, chromium-plated when materials are not of
corrosion-resistant steel. The ball type joint shall be designed
and constructed in accordance with ASME B31.1 and EJMA Stds.
Flanges shall conform to the diameter and drilling of ASME B16.5.
Molded gaskets shall be suitable for the service intended.
c.
Slip type expansion joints shall be EJMA Stds and ASME B31.1,
Class 1 or 2. Type II joints shall be suitable for repacking
under full line pressure.
2.11.18
Valves
Valves shall be Class 125 and shall be suitable for the application.
Grooved ends per AWWA C606 may be used for water service only. Valves in
nonboiler external piping shall meet the material, fabrication and
operating requirements of ASME B31.1. The connection type of all valves
shall match the same type of connection required for the piping on which
installed.
2.11.18.1
Gate Valves
Gate valves 65 mm 2-1/2 inches and smaller shall conform to MSS SP-80
bronze rising stem, threaded, solder, or flanged ends. Gate valves 80 mm 3
inches and larger shall conform to MSS SP-70 cast iron bronze trim, outside
screw and yoke, flanged, or threaded ends.
2.11.18.2
Globe Valves
Globe valves 65 mm 2-1/2 inches and smaller shall conform to MSS SP-80,
bronze, threaded, soldered, or flanged ends. Globe valves 80 mm 3 inches
and larger shall conform to MSS SP-85, cast iron, bronze trim, flanged, or
threaded ends.
SECTION 15569A
Page 49
Previous Page
