General technical0 pages

General Technical
Tubing Specifications
Carbon Steel Tubing
Seamless, soft annealed carbon steel tubing to ASTM A 179, Din 2391 or equivalent. 4-1 safety factor considering tensile strength of 47,000 psi at
room temperature. For higher temperature service, apply the reducing factors for elevated temperature operation as specified in Table 302.3 1A and
304.1.2 of the code for pressure piping in ANSI B31.3.
Recommended tube hardness is RB 72 or less.
The tubing should be suitable for bending and flaring and free of all surface defects and imperfections.
Stainless Steel Tubing
Seamless, annealed 304 or 316 Stainless Steel tubing to ASTM A 269 or A 213 or equivalent. 4-1 safety factor considering tensile strength of
75,000 psi at room temperature.
Tube hardness should not exceed RB 80. The preferable hardness range is RB 70-74.
Tubing should be suitable for bending and flaring, and should be free of any surface defects and imperfections. A derating factor must be used for
drawn and welded tubing.
Copper Tubing
Annealed, soft, seamless copper tubing to ASTM B 75 or equivalent. 5-1 safety factor considering tensile strength of 30,000 psi at room
temperature. Maximum hardness of the tubing is not to exceed RB 50. Preferred hardness range is RB 40-45.

Tubing–Working Pressure Tables
Maximum Allowable Working Pressure Tables
t
Table #1: Stainless Steel Tubing
TUBEt
Wall Thickness of Tube (inches)
O
t D (In)t 0.01t
0.012t
0.016t
0.02t
0.028t
0.035t
0.049t
0.065t
0.083t
0.095t
0.109t
0.120t
0.134t
0.156
1/16t
5,587 t
6,861 t
9,593 t
12,185 ttttttttttt
1/8t
tttt
8,565 t
10,829 ttt
tWorking Pressure (psig) tttt
3/16ttt
tt
5,474 t
7,039 t
10,116 tttttttt
1/4ttttt
4,020 t
5,132 t
7,500 t
10,135 ttttttt
5/16tttttt
4,037 t
5,848 t
8,071 ttttttt
3/8tttttt
3,326 t
4,791 t
6,566 ttttttt
1/2tttttt
2,611 t
3,741 t
5,092 t
6,696 tttttt
5/8ttttttt
2,951 t
3,998 t
5,225 t
6,075 ttttt
3/4ttttttt
2,436 t
3,289 t
4,283 t
4,966 t
5,785 tttt
7/8ttttttt
2,073 t
2,793 t
3,628 t
4,199 t
4,881
1ttttttt
t
1,804 t
2,427 t
3,146 t
3,637 t
4,220 t
4,688
1 1/4ttttttttt
2,485t
2,867t
3,321t
3,682t
4,149t
4,900
1 1/2ttttttttt
2,046t
2,358t
2,726t
3,020t
3,398t
4,003
The Allowable working pressures for 304 SS or 316 SS seamless tubing to ASTM A269-04 or equivalent based on the following data: Temperature: –20°F to 100°F;
Ultimate Tensile Strength: 75,000 psi; Allowable stress: 20,000 psi as specified by ASME B31.3-2002.
t
Table #2: Copper Tubing
TUBEt
Wall Thickness of Tube (inches)
O
t D (In)t0.028t
0.035t
0.049t
0.065t
0.083t
0.095t
0.109t
0.120t
1/8t
2,789 t
3,772 tttttt
3/16t
1,795 t
2,328 t
3,600 ttt Working Pressure (psig) tt
1/4t
1,306 t
1,681 t
2,550 t
3,624 tttt
5/16tt
1,314 t
1,973 t
2,767 tttt
3/8tt
1,078 t
1,608 t
2,237 tttt
1/2tt
791 t
1,172 t
1,615 t
2,145 ttt
5/8ttt
920 t
1,262 t
1,667 t
1,956 tt
3/4ttt
748 t
1,025 t
1,342 t
1,572 t
1,850 t
7/8ttt
634 t
868 t
1,133 t
1,326 t
1,556 t
1tttt
550 t
752 t
981 t
1,146 t
1,343 t
1,486
1 1/4ttttt
771t
900t
1,052t
1,163t
1 1/2ttttt
635t
740t
878t
954t
B r e n n a n

0.134t

0.148t

0.165t

0.18t

0.22

1,320t
1,082t

1,481t
1,212t

1,656t
1,353t

1,836t
1,497t

2,308
1,873

I n d u s t r i e s

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The Allowable working pressures for copper seamless tubing to ASTM B75-02, ASTM B251 or equivalent based on the following data: Temperature: –20°F to 100°F;
Ultimate Tensile Strength: 30,000 psi; Allowable stress: 6,000 psi as specified by ASME B31.3-2002.