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M414545
27
Table 2
GAS PIPE SIZE REQUIRED FOR 1,000 BTU NATURAL GAS — .64 SPECIFIC GRAVITY
AT 6½ ± 1½ INCH (1.62 ± .37 kPa) WATER COLUMN PRESSURE
EQUIVALENT LENGTH
GAS
APPLIANCES
TOTAL
BTU/HR.
25 FT.
(7.63 m)
50 FT.
(15.25 m)
75 FT.
(22.88 m)
100 FT.
(30.50 m)
125 FT.
(38.13 m)
150 FT.
(45.75 m)
BASED ON 0.3" WATER COLUMN PRESSURE DROP FOR LENGTH GIVEN
100,000
120,000
140,000
160,000
180,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
1,500,000
1,600,000
1,700,000
1,800,000
1,900,000
2,000,000
2,200,000
2,400,000
2,600,000
2,800,000
3,000,000
¾" (19.05mm)
¾" (19.05mm)
¾" (19.05mm)
¾" (19.05mm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
¾" (19.05mm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3½" (8.89cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
1" (2.54cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
1" (2.54cm)
1" (2.54cm)
1¼" (3.18cm)
1¼" (3.18cm)
1¼" (3.18cm)
1½" (3.81cm)
1½" (3.81cm)
2" (5.08cm)
2" (5.08cm)
2" (5.08cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
2½" (6.35cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3" (7.62cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
3½" (8.89cm)
4" (10.16cm)
FOR L. P. GAS, CORRECT THE TOTAL BTU/HR. BY MULTIPLYING IT BY 0.6. THE ANSWER IS THE
EQUIVALENT BTU ON THE ABOVE CHART.
IMPORTANT: The installation must conform with local codes or, in the absence of local codes:
• with the latest edition of the “National Fuel Gas Code”, ANSI Z223.1 in the U.S.A.,
• with CAN1-B149.1 or CAN1-B149.2 in Canada,
• and Australian Gas Association / Australian LP Gas Association requirements in Australia.