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AG 31-011 • REFRIGERANT PIPING DESIGN
Table 5: Equivalent Length for Fittings (Feet)
Nominal
Diameter
Smooth Elbows
Smooth Bend Tee Connections
90° Std
90° Long
Radius
90° Street
45° Std
45° Street
180° Std
Tee Branch
Flow
Straight Through Flow
No
Reduction
Reduced
25%
Reduced
50%
1/2
1.4
0.9
2.3
0.7
1.1
2.3
2.7
0.9
1.2
1.4
5/8
1.6
1.0
2.5
0.8
1.3
2.5
3.0
1.0
1.4
1.6
7/8
2.0
1.4
3.2
0.9
1.6
3.2
4.0
1.4
1.9
2.0
1-1/8
2.6
1.7
4.1
1.3
2.1
4.1
5.0
1.7
2.2
2.6
1-3/8
3.3
2.3
5.6
1.7
3.0
5.6
7.0
2.3
3.1
3.3
1-5/8
4.0
2.6
6.3
2.1
3.4
6.3
8.0
2.6
3.7
4.0
2-1/8
5.0
3.3
8.2
2.6
4.5
8.2
10.0
3.3
4.7
5.0
2-5/8
6.0
4.1
10.0
3.2
5.2
10.0
12.0
4.1
5.6
6.0
3-1/8
7.5
5.0
12.0
4.0
6.4
12.0
15.0
5.0
7.0
7.5
3-5/8
9.0
5.9
15.0
4.7
7.3
15.0
18.0
5.9
8.0
9.0
4-1/8
10.0
6.7
17.0
5.2
8.5
17.0
21.0
6.7
9.0
10.0
5-1/8
13.0
8.2
21.0
6.5
11.0
21.0
25.0
8.2
12.0
13.0
6-1/8
16.0
10.0
25.0
7.9
13.0
25.0
30.0
10.0
14.0
16.0
8-1/8
20.0
13.0
—
10.0
—
33.0
40.0
13.0
18.0
20.0
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,
Table 6: Equivalent Length for Valves and Refrigeration Devices (Feet)
Nominal
Diameter
Globe or
Solenoid
60°
Wye Valve
45°
Wye Valve
Angle Valve
Gate Valve
Swing Check
Sight Glass
Filter-Drier
Suction Filter
1/2
17
8
6
6
0.6
5
1.0
12
15
5/8
18
9
7
7
0.7
6
1.2
15
17
7/8
22
11
9
9
0.9
8
1.6
21
22
1-1/8
29
15
12
12
1.0
10
2.0
26
25
1-3/8
38
20
15
15
1.5
14
2.5
35
36
1-5/8
43
24
18
18
1.8
16
2.6
—
40
2-1/8
55
30
24
24
2.3
20
—
—
—
2-5/8
69
35
29
29
2.8
25
—
—
—
3-1/8
84
43
35
35
3.2
30
—
—
—
3-5/8
100
50
41
41
4.0
35
—
—
—
4-1/8
120
58
47
47
4.5
40
—
—
—
5-1/8
140
71
58
58
6.0
50
—
—
—
6-1/8
170
88
70
70
7.0
60
—
—
—
8-1/8
220
115
85
85
9.0
80
—
—
—
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,