Design and Construction Handbook - Los Angeles World Airports

Guide Specification
7. Iron: 0.003% maximum.
8. Other impurities: 0.3% maximum.
9. Magnesium: Remaining.
E. Anodes shall be cast with perforated galvanized steel strap core. One end of anode shall be
recessed so one end of strap is accessible for lead wire connection. Anode lead wires shall be
25 feet long, silver soldered to strap core and with a minimum 1 turns of wire at connection.
Fill anode recess connection with electrical potting compound. Conductors shall be No. 12
AWG Type TW copper wire.
F. Connectors shall be Cadwel Thermite brazing type elements for mechanically bonding
conductors to steel pipe. Moisture proof all connections to piping. Splices shall be made with
split bolt compression connectors and suitable protection tape.
G. For pipe installed in sleeves, provide insulators, equal to Maloney Model 57, spaced 10-feet
on centers, installed in accordance with manufacturer's recommendations. Provide insulating
coupling for pipe penetrating building wall.
H. Provide test stations housed in electrical conduit terminated in cast iron, waterproof junction
boxes at ground surface. Embed in 12-inches x 12-inches x 6-inches concrete marker.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Ream pipe and tube ends. Remove burrs. Bevel plain end ferrous pipe.
B. Remove scale and dirt, on inside and outside, before assembly.
C. Prepare piping connections to equipment with flanges or unions.
D. Keep open ends of pipe free from scale and dirt. Protect open ends with temporary plugs or
caps.
E. Field verify that connection to existing piping systems sizes, locations, and invert are as
required.
F. Establish elevations of buried piping with not less than allowed per code.
G. Establish minimum separation of from other piping services in accordance with code.
3.2 NATURAL FUEL GAS SYSTEMS INSTALLATION
A. Install piping free from traps and with drain pocket consisting of nipple and cap at low points
for inside building and drip pot for underground piping.
B. Install shut-off valves at connection to each piece of equipment. Provide union or right and
left nipple and coupling at equipment side of individual shut-off valve.
FACILITY NATURAL-GAS PIPING
22 70 00 - 14 Plumbing Systems