DriSteem Vapor-Logic Instalační příručka stáhnout pdf (Strana 29)

DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual • Page 27

G a s p i p i n g ( c o n t i n u e d )

“Installation Code for Natural Gas Burning Appliances and

Equipment,” or CAN/CGA-B149.2, “Installation Code for

Propane Burning Appliances and Equipment.”

In Europe: The National Gas Safety (Installation & Use)

Regulations.

• Do not use flexible connectors.

• Piping to units should conform with local and national

requirements for type, volume, and gas handled and for pressure

drop allowed in the line. Refer to the tables on this page to

determine the gas flow in ft

/hr or m

/hr for the type of gas and

size of unit to install. Using this value and the length of pipe

necessary, determine the pipe diameter. Where several units are

served by the same main, the total capacity, gas flow, and length

of main must be considered. Avoid pipe sizes smaller than ½"

(DN15). Table 27-2 below allows for the usual number of

fittings with a 0.3" wc (0.07 kPa) pressure drop.

• When the specific gravity of the gas is other than 0.60 for natural

gas or 1.53 for propane, use Table 27-1.

Table 27-2:

Gas pipe capacities for gas pressures of 0.5 psig (3.45 kPa) or less

Length

of pipe

Gas ﬂow in piping in ft

/hr and m

/hr at

pressure drop of 0.3" wc (0.07 kPa)

Speciﬁc gravity = 0.60

Nominal iron pipe diameter in inches (DN)

½" (DN15) ¾" (DN20) 1" (DN25) 1¼" (DN32) 1½" (DN40)

ft m ft

/hr m

/hr ft

/hr m

/hr ft

/hr m

/hr ft

/hr m

/hr ft

/hr m

/hr

10 3 132 3.7 278 7.9 520 14.7 1050 29.7 1600 45.3

20 6 92 2.6 190 5.4 350 9.9 730 20.7 1100 31.1

30 9 73 2.1 152 4.3 285 8.1 590 16.7 890 25.2

40 12 63 1.8 130 3.7 245 6.9 500 14.2 760 21.5

50 15 56 1.6 115 3.3 215 6.1 440 12.5 670 19.0

60 18 50 1.4 105 3.0 195 5.5 400 11.3 610 17.3

70 21 46 1.3 96 2.7 180 5.1 370 10.5 560 15.9

80 24 43 1.2 90 2.5 170 4.8 350 9.9 530 15.0

90 27 40 1.1 84 2.4 160 4.5 320 9.1 490 13.9

100 30 38 1.1 79 2.2 150 4.2 305 8.6 460 13.0

See example on page 28.

Table 27-1:

Specific gravity conversion factors

Natural gas

Speciﬁc gravity Factor

0.55 1.04

0.60 1.00

0.65 0.962

Propane gas

Speciﬁc gravity Factor

1.50 0.633

1.53 0.626

1.60 0.612

Note:

Use the above multiplying factor with Table: 27-2

when the speciﬁc gravity of gas is other than 0.60

(natural gas) or 1.53 (propane).

More gas piping instructions

on the next page ▶

Installation

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