PRESSURE RATING
High Purity Gas Delivery Systems Pressure Rating of Copper Pipes and Tubes Pipe - Copper - ASTM B280 - Type K O.D.
0,375'' (3/8'') 0,500'' (1/2'') 0,625'' (5/8'') 0,750'' (3/4'') 0,875'' (7/8'') 1,125'' (1-1/8'') 1,375'' (1-3/8'') 1,625'' (1-5/8'') 2,125'' (2-1/8'') 2,625'' (2-5/8'') 3,125'' (3-1/8'') 3,625'' (3-5/8'') 4,125'' (4-1/8'')
NOMINAL
1/4'' 3/8'' 1/2'' 5/8'' 3/4'' 1'' 1-1/4'' 1-1/2'' 2'' 2-1/2'' 3'' 3-1/2'' 4''
WALL
0,035'' 0,049'' 0,049'' 0,049'' 0,065'' 0,065'' 0,065'' 0,072'' 0,083'' 0,095'' 0,109'' 0,120'' 0,134
Pipe - Copper - ASTM B280 - Type L & ACR
I.D
0,305'' 0,402'' 0,527'' 0,652'' 0,745'' 0,995'' 1,245'' 1,481'' 1,959'' 2,435'' 2,907'' 3,385'' 3,857''
MAX. PRESSURE (IN PSIG) at 150˚F 913 960 758 626 724 557 452 420 370 338 328 311 306
O.D.
NOMINAL
0,375'' (3/8'') 0,500'' (1/2'') 0,625'' (5/8'') 0,750'' (3/4'') 0,875'' (7/8'') 1,125'' (1-1/8'') 1,375'' (1-3/8'') 1,625'' (1-5/8'') 2,125'' (2-1/8'') 2,625'' (2-5/8'') 3,125'' (3-1/8'') 3,625'' (3-5/8'') 4,125'' (4-1/8'')
1/4'' 3/8'' 1/2'' 5/8'' 3/4'' 1'' 1-1/4'' 1-1/2'' 2'' 2-1/2'' 3'' 3-1/2'' 4'
WALL
0,030'' 0,035'' 0,040'' 0,042'' 0,045'' 0,050'' 0,055'' 0,060'' 0,070'' 0,080'' 0,090'' 0,100'' 0,110''
I.D
0,315'' 0,430'' 0,545'' 0,666'' 0,785'' 1,025'' 1,265'' 1,505'' 1,985'' 2,465'' 2,945'' 3,425'' 3,905''
MAX. PRESSURE (IN PSIG) at 150˚F 775 662 613 537 495 420 373 347 309 285 270 258 249
Tube - Copper - ASTM 280 - Refrigeration Type O.D.
0,125'' (1/8'') 0,250'' (1/4'') 0,375'' (3/8'') 0,500'' (1/2'') 0,625'' (5/8'') 0,750'' (3/4'') 0,875'' (7/8'') 1,125'' (1-1/8'') 1,375'' (1-3/8'') 1,625'' (1-5/8'')
NOMINAL
1/8'' 1/4'' 3/8'' 1/2'' 5/8'' 3/4'' 7/8'' 1-1/8'' 1-3/8'' 1-5/8''
WALL
0,030'' 0,030'' 0,032'' 0,032'' 0,035'' 0,035'' 0,045'' 0,050'' 0,050'' 0,060''
I.D
0,065'' 0,190'' 0,311'' 0,436'' 0,555'' 0,680'' 0,785'' 1,025'' 1,275'' 1,505''
MAX. PRESSURE (IN PSIG) at 150˚F 2613 1195 836 618 525 435 495 420 373 347
Technical Data Values of allowable internal working pressure for copper tubes in service are based on the formula from ANSI B31, Standard Code for Pressure Piping: P = 2 S tm D - 0.8 tm
P S tm Od
= = = =
Allowable pressure Allowable stress Wall thickness Outside diameter
@ 150˚F S @ 200˚F S @ 300˚F S @ 400˚F S
= = = =
5100 PSIG annealed 4800 PSIG annealed 4700 PSIG annealed 3000 PSIG annealed
All ratings listed for types K, L, M, DWV and refrigeration service tube in the preceding charts are calculated for tube in the annealed condition. These values should be used when soldering, brazing or welding is employed for joining components in a system. While the ratings for hard drawn tube are substantially higher, they should only be used for systems using properly designed flare or compression mechanical joints, since joining by any heating process might anneal (soften) the tube. In designing a system, careful consideration should also be given to joint ratings as well as those of the components.
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