Fulton FB-S Horizontal Firetube Boiler - Manual (Page 26)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 26
c) The gas supply piping to the boiler must be appropriate to local
conditions and must be constructed and installed in compliance
with appropriate Codes and Standards. It should be of sufficient size
to satisfy the pressure and volume flow requirements of the burner
under all firing conditions. Checks should be made to ensure that all
meters and other components are appropriately rated for the maximum
gas flow rate anticipated.
Note
It is essential that a manual isolation valve is fitted upstream of the gas
control train to allow the burner to be isolated for maintenance. The size of
this valve should not be less than that of the burner control train in order to
avoid any restriction in gas flow.
Warning
It is essential that the installation of the gas piping must be undertaken
only by suitably qualified and experienced personnel and in compliance
with appropriate Codes and Standards. The Fulton Companies can accept
no responsibility for consequential loss, damage or personal injury, which
results from a failure to follow the manual.
Gas Line Sizing Chart
*There is a more exact formula, but you can round off the conversion of CF to BTU by using 1=1000 (for
example 174 CF on the chart would be equal to 174,000 BTU). This will give a more conservative total
estimate.
Pipe
Size
Length of Pipe in Feet
Inches 10 20 30 40 50 60 70 80 90 100
½ 174 119 96 82 73 66 61 56 53 50
¾ 363 249 200 171 152 135 127 118 111 104
1 684 470 377 323 286 259 239 222 206 197
1 ¼ 1404 955 775 663 588 532 490 456 428 404
1 ½ 2103 1445 1161 993 880 795 734 688 641 605
2 4050 2784 2235 1913 1696 1538 1413 1315 1234 1165
2 ½ 6455 4437 3503 3049 2703 2449 2253 2096 1966 1857
3 11,412 7843 6299 5391 4778 4329 3983 3705 3476 3284