mm 1/16 inch thickness full face or self-centering flat ring type
and suitable for pressure and temperature of the piping system.
c.
Butt Weld Joints: ASME B31.9. Backing rings shall conform to
ASME B31.9. Ferrous rings shall not exceed 0.05 percent sulfur;
for alloy pipe, backing rings shall be of material compatible with
the chemical composition of the parts to be welded and preferably
of the same composition. Provide continuous machined or split
band backing rings.
d.
Socket Weld Joints: ASME B31.9.
2.1.8.3
Joints for Copper Tubing
a.
Solder conforming to ASTM B 32 alloy grade Sb5 or Sn96. Solder
and flux shall be lead free (less than 0.2 percent of lead).
b.
Copper Tube Extracted Joint: An extracted mechanical tee joint
may be made in copper tube. Make joint with an appropriate tool
by drilling a pilot hole and drawing out the tube surface to form
a collar having a minimum height of three times the thickness of
the tube wall. To prevent the branch tube from being inserted
beyond the depth of the extracted joint, provide dimpled depth
stops. Notch the branch tube for proper penetration into fitting
to assure a free flow joint. Braze extracted joints using a
copper phosphorous classification brazing filler metal. Soldered
joints shall not be permitted.
2.1.9
Expansion Joints
2.1.9.1
Packless Type
Provide ASTM F 1120, Type III with fabricated corrosion-resistant steel
bellows.
2.1.9.2
Guided Slip-Tube Type
Provide ASTM F 1007, Type IV internally-externally guided, injected
semiplastic type packing.
2.1.10
2.1.10.1
Pressure and Vacuum Gauges
Provide ASME B40.1 with restrictor.
2.1.10.2
Indicating Thermometers
Thermometers shall be dial type with an adjustable angle suitable for the
service. Provide thermowell sized for each thermometer in accordance with
the thermowell specification. Fluid-filled thermometers (mercury is not
acceptable) shall have a nominal scale diameter of 125 mm 5 inches.
Construction shall be stainless-steel case with molded glass cover,
stainless-steel stem and bulb. Stem shall be straight, length as required
to fit well. Bimetal thermometers shall have a scale diameter of 90 mm 3
1/2 inches. Case shall be hermetic. Case and stem shall be constructed of
stainless steel. Bimetal stem shall be straight and of a length as
required to fit the well.
SECTION 15185N
Page 19
Previous Page
