Installation Guide

24
Sizing/Capacity Tables
Table 5.4 Elevated Pressure Natural Gas (2 PSI with 1 PSI drop)
Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of
Natural Gas by Length of Piping Run
(Approximate 1,000 BTU/h Natural Gas per 1 CFH; based on a 0.6 specic gravity of gas)
Minimum Gas Pressure: 6-7 in w.c. (¼ PSI) Pressure Drop: 1 PSI
Run (ft.)
IPS Pipe Size (SDR)
½"
(SDR 9.3) ¾" (SDR 11) 1" (SDR 11) 1¼" (SDR 10) 1½" (SDR 11) 2" (SDR 11)
10 1,860k 3,720k 6,710k 11,600k 17,600k 31,600k
20 1,280k 2,560k 4,610k 7,990k 12,100k 21,700k
30 1,030k 2,050k 3,710k 6,420k 8,690k 17,400k
40 878k 1,760k 3,170k 5,490k 8,300k 14,900k
50 778k 1,560k 2,810k 4,870k 7,350k 13,200k
60 705k 1,410k 2,550k 4,410k 6,660k 12,000k
70 649k 1,300k 2,340k 4,060k 6,130k 11,000k
80 603k 1,210k 2,180k 3,780k 5,700k 10,200k
90 566k 1,130k 2,050k 3,540k 5,250k 9,610k
100 535k 1,070k 1,930k 3,350k 5,050k 9,080k
125 474k 949k 1,710k 2,970k 4,480k 8,050k
150 429k 860k 1,550k 2,690k 4,060k 7,290k
175 395k 791k 1,430k 2,470k 3,730k 6,710k
200 368k 736k 1,330k 2,300k 3,470k 6,240k
250 326k 652k 1,180k 2,040k 3,080k 5,530k
300 295k 591k 1,070k 1,850k 2,790k 5,010k
350 272k 544k 981k 1,700k 2,570k 4,610k
400 253k 506k 913k 1,580k 2,390k 4,290k
450 237k 475k 856k 1,480k 2,240k 4,020k
500 224k 448k 809k 1,400k 2,120k 3,800k
550 213k 426k 768k 1,330k 2,010k 3,610k
600 203k 406k 733k 1,270k 1,920k 3,440k
650 194k 389k 702k 1,220k 1,840k 3,300k
700 187k 374k 674k 1,170k 1,760k 3,170k
750 180k 360k 649k 1,130k 1,700k 3,050k
800 174k 348k 627k 1,090k 1,640k 2,950k
850 168k 336k 607k 1,050k 1,590k 2,850k
900 163k 326k 588k 1,020k 1,540k 2,770k
950 158k 317k 572k 990k 1,500k 2,690k
1000 154k 308k 556k 963k 1,450k 2,610k
1100 146k 293k 528k 915k 1,380k 2,480k
1200 139k 279k 504k 873k 1,320k 2,370k
1300 134k 267k 482k 836k 1,260k 2,270k
1400 128k 257k 463k 803k 1,210k 2,180k
1500 124k 247k 446k 773k 1,170k 2,100k
1600 119k 239k 431k 747k 1,130k 2,030k
1700 115k 231k 417k 723k 1,090k 1,960k
1800 112k 224k 404k 701k 1,060k 1,900k
1900 109k 218k 393k 680k 1,030k 1,850k
2000 106k 212k 382k 662k 1,000k 1,800k
k = 1,000 BTU/h EXAMPLE: 10k = 10,000 BTU/h = 10 CFH (Cubic Feet per Hour) of Natural Gas