Wayne P250 - Page 12

64659-001 REV. A 07/06/18
12
Pipe Sizing Chart for Liquid Propane (11” w.c.) with Straight Schedule 40 Metal Pipe
The following chart is based on 11” w.c. inlet pressure and a pressure drop of 0.5” w.c..
Special use: Piping sizing between single or second stage (low pressure regulator) and appliance.
Maximum Capacity of Pipe Size in Btu per Hour
Pipe Size
1/2”
3/4”
1”
1 1/4”
1 1/2”
2”
3”
Actual ID
0.622
0.824
1.049
1.38
1.61
2.067
3.068
Length of
Pipe (feet)
Maximum Capacity in Btu/hr
10
291,000
608,000
1,145,000
2,352,000
3,523,000
6,786,000
19,119,000
20
200,000
418,000
787,000
1,616,000
2,422,000
4,664,000
13,141,000
30
160,000
336,000
632,000
1,298,000
1,945,000
3,745,000
10,552,000
40
137,000
287,000
541,000
1,111,000
1,664,000
3,205,000
9,031,000
50
122,000
255,000
480,000
984,000
1,475,000
2,841,000
8,004,000
60
110,000
231,000
434,000
892,000
1,337,000
2,574,000
7,253,000
80
94,000
197,000
372,000
763,000
1,144,000
2,203,000
6,207,000
100
84,000
175,000
330,000
677,000
1,014,000
1,952,000
5,501,000
125
74,000
155,000
292,000
600,000
899,000
1,730,000
4,876,000
150
67,000
140,000
265,000
543,000
814,000
1,568,000
4,418,000
200
58,000
120,000
227,000
465,000
697,000
1,342,000
3,781,000
250
51,000
107,000
201,000
412,000
618,000
1,189,000
3,351,000
300
46,000
97,000
182,000
373,000
560,000
1,078,000
3,036,000
350
42,000
89,000
167,000
344,000
515,000
991,000
2,793,000
400
40,000
83,000
136,000
320,000
479,000
922,000
2,599,000
Table 3 - LP Pipe Capacity
Pipe Sizing Chart for Liquid Propane (11” w.c.) with Copper Tubing
The following chart is based on 11” w.c. inlet pressure and a pressure drop of 0.5” w.c..
Maximum Capacity of Tube Size in Btu per Hour
Pipe Size
1/2”
5/8”
3/4”
7/8”
Length
(feet)
Maximum Capacity in Btu/hr
10
110,000
206,000
348,000
536,000
20
76,000
141,000
239,000
368,000
30
61,000
114,000
192,000
296,000
40
52,000
97,000
164,000
253,000
50
46,000
86,000
146,000
224,000
60
42,000
78,000
132,000
203,000
70
38,000
71,000
120,000
185,000
80
36,000
67,000
113,000
174,000
90
33,000
62,000
105,000
161,000
100
32,000
59,000
100,000
154,000
Table 4 - LP Copper Tubing Capacity
NOTE: Copper tubing shall comply with standard type K or L of ASTM B 88 or ASTM B 280.