Gasline Sizing

Question 1

What’s the first thing to determine when running a gas line?

Answer 1

Type of fuel

Question 2

All appliances must be certified for what

Answer 2

The type of fuel being used or it can’t be installed

Question 3

Excessive amount of fittings and directions may cause what

Answer 3

Potential problems

Question 4

What’s the outlet pressure of a gas metre for natural gas?

Answer 4

7” to 14” wc

Question 5

When running off manifold with gas lines, what needs the safety factors to consider

Answer 5

Tagged
No longer then 50 ft

Question 6

Where do you find inputs for the appliances?

Answer 6

Rating plate

Question 7

If MBH value falls between the numbers, what must you do?

Answer 7

Go to the higher value

Question 8

Before you run a gas line, what must be done

Answer 8

Pull a permit

Question 9

What’s the minimum size face on a test dial gauge

Answer 9

3”

Question 10

Up to 2 psig what is the pressure test requirements for 200 ft or less

Answer 10

15 psig for 15 min

Question 11

For 2 psig gas line what is pressure test requirements for 200 feet or more?

Answer 11

15 psig for 60 min

Question 12

All wrapped and factory coded piping and tubing. Have to be pressure tested to what

Answer 12

Min 100 psig

Question 13

3 inch pressure gauge needs to calibrate in what increments

Answer 13

2 psig or 2 percent

Question 14

Gauge should not exceed the test pressure by at least what

Answer 14

15 percent but no higher then 300 percent

Question 15

When pressure test is complete what’s the next steps?

Answer 15

Purge line to outside no closer than 10 feet to building intake

Question 16

How do you verify a gas line is properly sized

Answer 16

Standing pressure test
Operating pressure test

Question 17

What’s the maximum allowable drop on gas?

Answer 17

1” wc

Question 18

Where is standing pressure test taken from?

Answer 18

Downstream of service regulator

Question 19

If pressure drops greater than a level limits, what’s the cause?

Answer 19

Gas lines too small

Question 20

Every time you do a gas piping installation what must be done

Answer 20

Standing and operating pressure test

Question 21

what’s the maximum length of corrugated metal connecter for suspended, appliance, or decorative appliance?

Answer 21

2ft

Question 22

A commercial tubing system must be identified at what intervals

Answer 22

20 ft

Question 23

Can swing joint be installed in a concealed location

Answer 23

No

Question 24

Propane has a density of what

Answer 24

1.5

Question 25

Natural gas has relative density of what

Answer 25

0.6

Question 26

Threaded pipe for natural gas must not be smaller than

Answer 26

1/2 diameter

Question 27

Gas piping or tubing may be made of what material

Answer 27

Steel , copper ,polyethylene

Question 28

What type of copper is approved for underground for gas line?

Answer 28

Type K

Question 29

Polyethylene is non-conductive what needs to be done to locate pipe under ground

Answer 29

14 gauge tracer wire

Question 30

Plastic piping shall not be used for what type of fuel

Answer 30

Liquid propane

Question 31

What’s the minimum rated working pressure for a hose and fittings for appliance connecter

Answer 31

350 psi

Question 32

Maximum length of a hose on permanent installation

Answer 32

10 ft

Question 33

Maximum length of holds on portable appliance, such as barbeque

Answer 33

30 ft

Question 34

Maximum length of flex connecter on vented appliance

Answer 34

2 ft

Question 35

Maximum length of flex connecter on un vented appliance

Answer 35

6 ft

Question 36

Unthreaded of pipe exposed from ceiling, wall and floors are how much

Answer 36

Ceilings and walls, or 1 inch
Floor is 2 inch minimum

Question 37

All gas lines are buried, at least how much in depth and how much for a commercial

Answer 37

15”
24” commercial and driveways

Question 38

Alberta public works requires gas lines to be painted what

Answer 38

Orange instead of yellow

Question 39

Isolation valves may be installed horizontally only if they are watt

Answer 39

Located within 2 feet

Question 40

How are gas lines installed on rooftop

Answer 40

Must be supported and painted

Question 41

What’s the maximum spacing for supports for half inch pipe

Answer 41

6 feet

Question 42

What’s the maximum spacing for supports for three-quarter inch?

Answer 42

8 feet