Installation Guide

48
Sizing/Capacity Tables
Table 7.9 Elevated Pressure LP (2 PSI with 1
PSI drop)
Maximum Capacity of HOME-FLEX® CSST in BTU/h
(British Thermal Units per Hour) of
LiquidPropane(LP)Gas by Length of Piping Run
(Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a
1.52 specic gravity of gas)
Inlet Pressure
: 2 PSI Pressure Drop: 1 PSI
Run (ft.)
Tubing Size
(EHD)
½" (EHD 18) ¾" (EHD 25) 1" (EHD 31)
5 908k 3,259k 9,279k
10 637k 2,353k 6,426k
15 518k 1,945k 5,183k
20 448k 1,699k 4,450k
25 399k 1,530k 3,954k
30 364k 1,404k 3,590k
40 314k 1,226k 3,082k
50 280k 1,104k 2,738k
60 256k 1,014k 2,486k
70 236k 943k 2,291k
75 228k 913k 2,209k
80 221k 885k 2,135k
90 208k 838k 2,005k
100 197k 797k 1,896k
125 176k 718k 1,685k
150 160k 659k 1,530k
200 138k 576k 1,313k
300 112k 476k 1,059k
400 97k 416k 910k
500 87k 374k 808k
Table 7.10 Elevated Pressure LP (5 PSI with
3.5 PSI drop)
Maximum Capacity of HOME-FLEX® CSST in BTU/h
(British Thermal Units per Hour) of
LiquidPropane(LP)Gas by Length of Piping Run
(Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a
1.52 specic gravity of gas)
Inlet Pressure
: 5 PSI Pressure Drop: 3.5 PSI
Run (ft.)
Tubing Size
(EHD)
½" (EHD 18) ¾" (EHD 25) 1" (EHD 31)
5 2,108k 7,734k 20,369k
10 1,491k 5,469k 13,912k
15 1,217k 4,465k 11,131k
20 1,054k 3,867k 9,502k
25 943k 3,459k 8,405k
30 861k 3,157k 7,603k
40 745k 2,734k 6,490k
50 667k 2,446k 5,741k
60 609k 2,233k 5,193k
70 563k 2,067k 4,771k
75 544k 1,997k 4,593k
80 527k 1,934k 4,433k
90 497k 1,823k 4,155k
100 471k 1,729k 3,921k
125 422k 1,547k 3,468k
150 385k 1,412k 3,137k
200 333k 1,223k 2,678k
300 272k 998k 2,143k
400 236k 865k 1,829k
500 211k 773k 1,618k
k = 1,000 BTU/h EXAMPLE: 252k = 252,000 BTU/h = 100 CFH (Cubic Feet per Hour) of LP Gas
Equivalent Hydraulic Diameter (EHD): A theoretical sizing which is used to compare the
hydraulic performance between manufacturers. A higher EHD number indicates greater
ow capacity of piping.
Tables include losses for four 90 degree bends and two (2) end ttings. Tubing runs with
larger numbers of bends and/or tting shall be increased by an equivalent length of tubing
according to the following formula: L = 1.3 x (n) where L is the additional length of tubing
necessary and n is the number of additional ttings and/or bends.