MODULE 8 ASSIGNMENT 1 NATURAL
GAS AND PROPANE INSTALLATION
FITTING AND PRESSURE TESTING
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
list 3 piping materials uses in gas piping systems
-ANSWER ✔✔ code 6.6.1 (extensions) 1. steel/iron 2. copper 3. plastic/
polyethylene
max allowable pressure drop on piping sys that has natural gas supply pressure of 7
in w.c. to 14 in w.c.
-ANSWER ✔✔ code 6.3.2 and table 6.1 allowable pressure drop is 1 in w.c.
what type fitting may be used with steel pipe
-ANSWER ✔✔ code 6.2.2 (material) black malleable iron or steel
what is the maximum pressure drop allowed on piping system that has nat gas
supply pressure less than 7 in w.c.
-ANSWER ✔✔ Table 6.1 0.5 in w.c
list type of copper tube that can be used for above ground gas systems -ANSWER
✔✔code 6.2.4 (material)
type G,K,L
how shall piping be sized -ANSWER ✔✔code 6.3.1 (size)
to meet volume and pressure requirements at point of use
how shall gas pressure requirements for an appliance be determined -ANSWER
✔✔code 6.5.1 (allowable pressure & pressure drop)
1. appliance rating plate
2. appliance manufacturer
how shall an extension of an existing piping or tubing system be sized -ANSWER
✔✔code 6.3.3 (a) and (b) (size)
, a. use of applicable tables in annex A for natural gas or annex B for propane,
making allowance for fittings as necessary
b. method of calculation outlined in annex A for Nat gas or annex B for propane.
how shall the volume of gas to an appliance be determined -ANSWER ✔✔code
6.5.1 ( allowable pressure and pressure drop)
1. appliance rating plate
2. appliance manufacturer
where are connections made on a pipe system that does not have sufficient capacity
to supply additional appliances -ANSWER ✔✔code 6.6.2 (extensions)
with in 24 inches (610mm) of the point of the supplier termination or the line
pressure regulator, at which point it may be reduced if necessary
must the ends of all pipes be reamed -ANSWER ✔✔6.8.2 (piping practices)
yes
maximum spacing of support for various horizontal pipe sizes -ANSWER ✔✔table
6.2 (piping practices)
1/2 inch - every 6ft
3/4 to 1 inch- every 8 ft
1-1/4 to 2-1/2- every 10 ft
3-4 inch- every 15 ft
5-8 inch- every 20 ft
10 in or larger- every 25 ft
note: vertical pipe over 6 ft need support
what diameter piping require welded joints -ANSWER ✔✔code 6.9.2 (joints and
connections)
piping of NPS 2-1/2 AND OVER
May copper joints be made with brazing material that has a melting temp
exceeding 1000 f (537 C) -ANSWER ✔✔code 6.9.9 (joints and connections)
GAS AND PROPANE INSTALLATION
FITTING AND PRESSURE TESTING
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT RATED A+
list 3 piping materials uses in gas piping systems
-ANSWER ✔✔ code 6.6.1 (extensions) 1. steel/iron 2. copper 3. plastic/
polyethylene
max allowable pressure drop on piping sys that has natural gas supply pressure of 7
in w.c. to 14 in w.c.
-ANSWER ✔✔ code 6.3.2 and table 6.1 allowable pressure drop is 1 in w.c.
what type fitting may be used with steel pipe
-ANSWER ✔✔ code 6.2.2 (material) black malleable iron or steel
what is the maximum pressure drop allowed on piping system that has nat gas
supply pressure less than 7 in w.c.
-ANSWER ✔✔ Table 6.1 0.5 in w.c
list type of copper tube that can be used for above ground gas systems -ANSWER
✔✔code 6.2.4 (material)
type G,K,L
how shall piping be sized -ANSWER ✔✔code 6.3.1 (size)
to meet volume and pressure requirements at point of use
how shall gas pressure requirements for an appliance be determined -ANSWER
✔✔code 6.5.1 (allowable pressure & pressure drop)
1. appliance rating plate
2. appliance manufacturer
how shall an extension of an existing piping or tubing system be sized -ANSWER
✔✔code 6.3.3 (a) and (b) (size)
, a. use of applicable tables in annex A for natural gas or annex B for propane,
making allowance for fittings as necessary
b. method of calculation outlined in annex A for Nat gas or annex B for propane.
how shall the volume of gas to an appliance be determined -ANSWER ✔✔code
6.5.1 ( allowable pressure and pressure drop)
1. appliance rating plate
2. appliance manufacturer
where are connections made on a pipe system that does not have sufficient capacity
to supply additional appliances -ANSWER ✔✔code 6.6.2 (extensions)
with in 24 inches (610mm) of the point of the supplier termination or the line
pressure regulator, at which point it may be reduced if necessary
must the ends of all pipes be reamed -ANSWER ✔✔6.8.2 (piping practices)
yes
maximum spacing of support for various horizontal pipe sizes -ANSWER ✔✔table
6.2 (piping practices)
1/2 inch - every 6ft
3/4 to 1 inch- every 8 ft
1-1/4 to 2-1/2- every 10 ft
3-4 inch- every 15 ft
5-8 inch- every 20 ft
10 in or larger- every 25 ft
note: vertical pipe over 6 ft need support
what diameter piping require welded joints -ANSWER ✔✔code 6.9.2 (joints and
connections)
piping of NPS 2-1/2 AND OVER
May copper joints be made with brazing material that has a melting temp
exceeding 1000 f (537 C) -ANSWER ✔✔code 6.9.9 (joints and connections)
