J10 PPT 1 + 2 Flashcards
What are the liquified petroleum gases?
Propane and butane
Difference between a tank and cylinder?
Tank is for permanent storage and cylinder for transport
How is the weight of propane tanks categorized?
U.S water gallons (USWG)
1 USWG = ______lbs
8.33lbs
For residential and commercial customers. Propane tanks weigh between ____USWG and ______USWG
120-1000 USWG
Tanks up to 1000USWG are built to what specification?
ASME
What is the purpose of the C.R.N number on a propane tank nameplate?
Province or territory it can be installed. (B.C is #1)
Propane cylinders range anywhere between __lb to ____lb
1-420lb
Why can propane tanks not be laid horizontally?
The safety valve is immersed in liquid
Propane cylinders must undergo re-qualification every ___ years
10
Re-qualification and remarking of a refillable propane cylinder shall be done by qualified persons registered with _______ _________
Transport Canada
Length of the propane cylinder dip tube of a fixed liquid level gauge indicates max level a cylinder may be filled. True or False?
True
Where to find information about propane dip tub length?
Annex G
Propane vapour service is a standard _______ POL thread
female
Propane liquid service is a standard ________ POL thread
male
Propane liquid and vapour service (standard used today) has the threads on ______ sides
both
Safety relief valve rating for a propane tank is _____-______psi
250-312psi
Propane relief valves relieve pressure from the ________ space of the tank
vapour
Propane storage vessels are filled to ___% of the capacity.
80%
Propane storage cylinders filled shall be ___% liquid and __% vapour
80% liquid
20% vapour
Liquid propane spits out when it reaches the point of the inlet of the spit valve. Up until that point, only vapour releases. True or False?
True
Cylinders that are more full provide ________ vaporization rates
higher
When the demand for propane vapour increases, more _____ is required.
Heat
If air is high humidity, the cool air may condense on the wetted surface of the propane bottle and freeze, which acts as an __________ and reduces the ___________ rate
insulator
reduces
Why does the wetted surface decrease the vaporization rate?
Vaporization requires heat and the wetted surface acts as an insulator
Two important factors when sizing propane storage?
- combined burner inputs (btuh).
how fast can we turn liquid into gas - Ambient temperature (affects vaporization rate)
How does ambient temperature affect the propane cylinder/tank?
Affects the vaporization rate
At -45F, propane has __ vapour pressure
0
Containers installed above ground can be influenced by the outside temperature, wind patterns, direct sunlight as well as winter cold air. ALL influence the _________ rate.
vaporization rate
What is the benefit of installing a propane container underground?
Relatively constant temperatures underground
Natural gas is stored at
_____f. At slightly _______ atmospheric pressure. Nat gas can not be liquified above -116f.
-260f
above
To store natural gas in it’s liquid state all substances that liquefy must be removed to prevent?
plugging up of the lines
What does LNG stand for?
liquid natural gas
LNG lower mainland plant can liquefy ___________ cu ft of natural gas per day
3,500,000
Liquifying procedure
- Removed products are reintroduced when we convert it back to the _______ state
- Work done by _______ or regasifiers
- Capable of converting __ million cu ft of gas per day back into transmission lines
- gaseous
- vaporizers
- 50
What is Boyles law?
P1V1 = P2V2
When sizing an orifice for burners; the smaller the number the _________ the orifice
SAME AS AWG WIRING
bigger
Higher K factor means _______ efficiency
higher
