
Parker Hannifin Corporation
Parflex Division
Ravenna, Ohio
Bulletin No. 4660-PGP2T
Parflex
®
Flexible Gas Piping System
Design and Installation Guide
Natural Gas
Caution: Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each
installation.
Section 7.0 Sizing Tables
7.1 CSST Tables (Continued)
Note
: Tables 6 and 7 do not include the effects of pressure drop across the line regulator. If regulator pressure drop exceeds 22" WC across 325-3 or 325-5A regulators,
DO NOT USE
TABLES 5 and 6
.
CONTACT PARKER AT 1-888-FASTMATE.
*Table includes losses for four 90 degree bends and two end fittings. To determine flow capacity for tubing runs with additional bends and/or fittings, add the appropriate number of
feet to the actual run length using the formula: L = 1.3n. L = number of feet to be added to actual run length; n = number of additional bends and/or fittings.
Table 4*
Maximum Flow Capacity of Parker Parflex Tubing in Cubic Feet per Hour
Gas Pressure: 0.5 psi or less; Pressure Drop: 2.0 in. WC
(Based on a 0.60 Specific Gravity Gas)
Part
Tube
Tubing Length (ft.)
No.
Size
5
10
15
20
25
30
40
50
60
70
80
90
100 125 150 200 250 300 350 400 450 500
PGP-6
3/8”
101
71
60
51
47
43
38
33
31
28
26
25
24
22
20
17
15
14
13
12
12
11
PGP-8
1/2”
234 172 143 123 110 101
90
82
75
70
65
62
59
53
49
43
38
36
34
31
29
28
PGP-12
3/4”
449 339 279 242 217 200 173 156 143 133 124 117 111 101
92
79
71
66
60
57
54
51
PGP-16
1”
1246 873 708 610 545 496 428 382 347 321 300 282 268 239 217 187 167 152 141 131 123 117
PGP-20 1-1/4”
2006 1442 1189 1037 933 855 746 671 615 571 536 507 482 434 398 347 312 286 266 249 236 224
PGP-32
2"
6222 4449 3656 3181 2855 2614 2274 2041 1869 1734 1626 1536 1459 1310 1199 1043 936 857 796 746 704 669
Table 5*
Maximum Flow Capacity of Parker Parflex Tubing in Cubic Feet per Hour
Gas Pressure: 0.5 psi or less; Pressure Drop: 3.0 in. WC
(Based on a 0.60 Specific Gravity Gas)
Part
Tube
Tubing Length (ft.)
No.
Size
5
10
15
20
25
30
40
50
60
70
80
90
100 125 150 200 250 300 350 400 450 500
PGP-6
3/8”
132
92
75
64
57
52
45
40
36
33
31
29
28
25
23
19
17
16
14
14
13
13
PGP-8
1/2”
308 219 179 155 139 127 110
99
90
84
78
74
70
63
57
50
45
41
39
35
33
32
PGP-12
3/4”
500 412 340 296 266 244 212 191 175 162 152 144 137 123 113
98
88
81
75
70
67
63
PGP-16
1”
1500 1046 847 729 649 591 509 453 412 380 355 334 316 281 256 220 196 178 165 154 144 137
PGP-20 1-1/4”
2432 1749 1442 1258 1131 1037 904 813 746 693 650 615 585 526 482 420 378 347 322 302 286 272
PGP-32
2"
7571 5413 4449 3870 3453 3181 2767 2484 2274 2111 1978 1869 1776 1594 1459 1270 1140 1043 968 908 857 815
Table 6*
Maximum Flow Capacity of Parker Parflex Tubing in Cubic Feet per Hour
Gas Pressure: 0.5 psi or less; Pressure Drop: 4.0 in. WC
(Based on a 0.60 Specific Gravity Gas)
Part
Tube
Tubing Length (ft.)
No.
Size
5
10
15
20
25
30
40
50
60
70
80
90
100 125 150 200 250 300 350 400 450 500
PGP-6
3/8”
148 103
84
72
64
58
50
44
40
37
35
32
31
28
25
21
19
18
16
15
14
13
PGP-8
1/2”
345 246 201 175 157 143 124 112 102
95
88
84
79
71
65
57
51
46
44
40
38
36
PGP-12
3/4”
601 465 383 333 299 273 238 214 195 181 170 161 153 137 126 109
98
90
83
78
74
70
PGP-16
1”
1714 1199 972 838 747 680 586 523 476 439 410 386 366 326 297 255 228 207 192 179 168 159
PGP-20 1-1/4”
2789 2006 1654 1442 1279 1189 1037 933 855 795 746 705 671 603 553 482 434 398 369 347 328 312
PGP-32
2"
8702 6222 5113 4449 3993 3656 3181 2855 2614 2426 2274 2148 2041 1832 1677 1459 1310 1199 1113 1043 985 936