BI Flashcards
Schedule 40 is used for pressures up to
125psig can exceed if welded or flanged
Copper G, L, K can be laid underground which are coated
G, L are both coated in pluethelyne resin
Hose and hose fittings must have a minimum pressure rating of
350psig
When BTU input isn’t on appliance it can be found
Online or instruction maual
What Gas line installation are not aloud unless with permit
Stairwell, chimney, elevator shafts, flue
2 requirements when laying gas lines in concrete flooring there must be
1/2” air space
Removable too that is not airtight
Welded fittings have to be
Manufactured
When drilling a hole on a wood member you must be how far from edge
2” from edge
Pipe dope is applied to
Male thread only
The white teflon tape is used for
Plumbing not gas fitting
When applying teflon tape you always leave
2 threads at start, 50% overlap
Threading bushings may be used on gas lines as long as they’re
approved
Gaskets used in gas systems cannot be
Natural rubber
Dirt pockets at the bottom of an appliance are used to catch
Dirt
Dirt pocket consists of three parts what are they
A tee
A cap
A nipple
The minimum depth of dirt pockets is
Minimum 3”
Defective piping cannot be serviced
True or false
True
Bushings can or cannot be installed
Cannot
Unions and swing joints
Loosen over time
The electrical code states
Gas pipe cannot be a conductor
Can you use close nipple and street fittings on gas lines
No
Piping can or cannot pass under a foundation or wall
No
Gas piping is installed how far under your ground and how far under your driveway
Never less then 15”
Under driveway 24”
All plastic gas lines must have a
Tracer wire
