Line D Pipe Sizing (Tables)

Question 1

What four factors affect the flow of gas through a piping system?

Answer 1

Type of gas, diameter of pipe, length of pipe, pressure drop

Question 2

What factor determines which of the two formulas are used to develop the code tables?

Answer 2

System Pressure

Question 3

Pipe sizing tables in the B149.1 used to size low pressure piping systems make an allowance for a reasonable number of fittings. How is this accomplished?

Answer 3

By adding a hidden 20% to the displayed code zone lengths (as noted in the formula in the code book)

Question 4

Plastic pipe is approved for use in a liquid propane system.

TRUE / FALSE

Answer 4

FALSE (B149.1.20, 6.2.16)

Question 5

In what two ways can the volume of gas required for an appliance be determined?

Answer 5

The appliance rating plate, or the appliance manufacturer when the rating is not shown on the appliance (B149.1.20, 6.4.2)

Question 6

What shall not be done if piping or tubing is located in an area where a corrosive chemical is used?

Answer 6

It must not be concealed (B149.1.20, 6.7.3)

Question 7

In British Columbia, piping of NPS 2 ½” and over shall have welded pipe joints.

TRUE / FALSE

Answer 7

FALSE. BC Gas Safety Regulations - 2.3 Clause 6.9.2 of CSA B149.1-20 is repealed and the following substituted: 6.9.2 Piping of NPS 2-1/2 to 4 shall be either press-connect fittings certified to CSA 6.32(ANSI LC-4) or welded pipe joints. Piping greater than NPS 4 shall be welded pipe joints.

Question 8

If a gas piping system requires welding, who can perform this welding?

Answer 8

Welding of gas piping systems shall be performed in accordance with a procedure and by an operator registered under the applicable provincial or territorial legislation.
(B149.1.20, 6.9.3).

Question 9

When can piping or tubing enter a building below grade?

Answer 9

Only when permitted by the Authority Having Jurisdiction (good luck) (B149.1.20, 6.15.8)

Question 10

What are the three ways that piping or tubing can be identified by in a care, detention occupancy, commercial, industrial or assembly building?

Answer 10

The entire piping or tubing system shall be painted yellow, The piping or tubing system shall be provided with yellow banding that has a minimum width of 1” and is marked at intervals not exceeding 20’, or the piping or tubing system shall be labelled “GAS” or “PROPANE” utilizing yellow label s or markings.
(B149.1.20, 7.17.1)

Question 11

Can a quick disconnect device be used instead of a manual shut off valve?

Answer 11

NO (B149.1.20, 6.18.7)