Buying Guide

109
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Temperature Limits of Materials
Rated Internal Working Pressures of Joints made with Copper Water Tube and Solder Type Fittings, PSI (Bar)
Copper Water Tube K, L and M Nominal Sizes, In Inches (mm)
Water A Saturated
Solder or Brazing Service Temperature Steam LB (kg)
Alloy Used in Joints ° F (° C) ¼" to 1" 1¼" to 2" 2½" to 4" 5" to 8" 10" to 12" All Sizes
50- 50 Tin-Lead
B, G
100 (38) 200 (14) 175 (12) 150 (10) 135 (9) 100 (7) 15
D
(6.8)
D
150 (66) 150 (19) 125 (8) 100 (7) 90 (6) 70 (4)
200 (93) 100 (9) 90 (6) 75 (5) 70 (40) 50 (3)
250 (121) 85 (6) 75 (5) 50 (3) 45 (3) 40 (2)
95-5 Tin-Antimony
C
100 (38) 635 (43) 560 (39) 375 (26) 340 (23) 150 (10) 15
D
(6.8)
D
150 (66) 635 (43) 560 (39) 375 (26) 340 (23) 150 (10)
200 (93) 630 (43) 480 (33) 375 (26) 340 (23) 140 (10)
250 (121) 435 (30) 330 (23) 265 (18) 245 (16) 110 (7)
Brazing Alloys, 100-150-200 (32-66-93)
H H H H H
120
E
(54.4)
E
Melting at or above 250
F
(121)
F
H H H H H
1000° F (538° C) 350 (177)
H H H H H
The values in the above table are based on data in the National Bureau of Standards
publications, ”Building Materials and Structures Reports“ BMS 58 and BMS 83.
A
Including other non-corrosive liquids and gases.
B
ASTM B 32, Alloy Grade Sn50.
C
ASTM B 32, Alloy Grade Sb5.
D
This pressure is determined by the temperature of saturated steam at 15 Ib. (6.8 kg)
pressure at 250° F (121° C).
E
This pressure is determined by the temperature of saturated steam at 120 Ib. (54.4 kg)
pressure at 350° F (177° C).
Pressure/Temperature Ratings for
Bronze Pressure Rated Valves‡
Temperature Pressure – PSI
Press. Class 125
2,3
150
3
200
3
300
3
End Conn. Thd. Thd. Thd. Thd.
°F °C ASTM B 62 ASTM B 61
-20 to 150 -28.8 to 65.5 200 300 400 600
200 93.3 185 270 375 560
250 121.1 170 240 350 525
300 148.8 155 210 325 490
350 176.6 140 180 300 450
400 204.4 – – 275 410
406 207.7 125 150 – –
450 232.2 120
1
145
1
250 375
500 260.0 – – 225 340
550 287.7 – – 200 300
1
Some codes (i.e. ASME BPVC, SECTION 1) limit the rating temperatures of the
indicated material to 406° F temperatures.
2
Buna-N disc valves limited to 180° F temperatures.
3
PTFE disc valves limited to 450° F temperatures.
4
Solder end valves are limited by temperatures which affect the strength of the
solder joint.
‡ Tables from MSS SP-80
Pressure/Temperature Ratings for NIBCO
®
Gray Iron and Ductile Iron Valves
Gray Iron Ductile Iron
Class 125 Class 250 Class 150
1
Temperature 200 WOG 500 WOG
°F °C 2"-12" 14"-24" 30"-48" 2"-12" 14"-24" 2"-12"
-20 to 100 -28.8 to 37.7 200 150 150 500 300 285
150 65.5 200 150 – 500 300 243
200 93.3 190 135 115 460 280 235
225 107.2 180 130 100 440 270 –
250 121.1 175 125 85 415 260 225
275 135.0 170 120 65 395 250 –
300 148.8 165 110 50 375 240 215
325 162.7 155 105 355 230 –
350 176.6 150 100 335 220 210
375 190.5 145 315 210 –
400 204.4 140 290 200 200
425 218.3 130 270 –
*450 232.2 125 250 185
500 260.0 170
550 287.7 155
600 315.5 140
650 343.3 125
The temperature shown for the corresponding rating shall be the metal temperature of
the pressure retaining parts. It shall be assumed that the metal temperature will be the
temperature of the contained fluid. Use of a pressure rating at a metal temperature other than
that of the contained fluid shall be the responsibility of the user.
1
Buna-N Disc Valves limited to 180° F or EPDM Disc Valves limited to 250° F.
* Maximum temperature for bronze trim or PTFE
F
For service temperatures lower than 250° F (121° C), the solders as above may be used.
G
The Safe Drinking Water Act Amendment of 1986 prohibits the use in potable water
systems of any solder having a lead content in excess of 0.2%.
H
Rated internal pressure is that of the tube being joined. While solders can be used,
brazing alloys are recommended.