Linear Boiler Gas Line Piping, Installation of Sediment Trapand Burner Supply

PAGE 12 BIASI B/40

9. Gas Line Piping

Gas supply piping is to be sized and installed properly in order to provide a supply of gas sufficient to meet the maximum demand without undue loss of pressure between the meter and the boiler. It is advisable to run a separate gas line from the meter to the gas burner to avoid pressure drops. Consult with the National Fuel Gas Code ANSI Z223.1 for proper sizing of gas piping for various lengths and diameters.

Locate a drop pipe adjacent to, but not in front of the boiler. Locate a tee in the drop pipe at the same elevation as the gas inlet connection to the boiler. Extend the drop line with a nipple towards the floor and cap to form a sediment trap. Install a tee handle shut off valve before the tee with sediment trap and a union after the tee before the combination gas valve.

When installing the boiler, Use black steel pipe and malleable fittings (do not use cast iron parts) with a suitable pipe dope which is resistant to liquefied petroleum gases.

Check piping for leaks. Always check leaks with a water and soap solution. DO NOT USE A FLAME FOR CHECKING GAS LEAKS

The boiler and its individual shut-off valve must be disconnected from the gas supply piping during any pressure testing of that piping at test pressures in excess of 1/2 psi.

INSTALLATION OF SEDIMENT TRAPAND BURNER SUPPLY

To check for gas leaks, use a gas detector or apply a soap solution

to the joints.

DO NOT USE AN

Direction of flow

Manual Shutoff Valve Height of shutoff valve above ground level to conform to local codes,

Pressure Gauge Port

(1/8” NPT plugged)

Minimum

1” X 1” X 1” Tee

3” MINIMUM

Male Union 1” NPT

Burner Gas

Pipe Cap