Iron Pipe and Fittings Flashcards
Test 4
1
Q
What is the proper fabrication procedure for threaded pipe
A
- Measure the cut,
- Mark the cut,
- cut the pipe,
- Ream the pipe
2
Q
What does G stand for
A
Gas
3
Q
What are joint compounds considered to be
A
Lubricant
4
Q
Where is Rex union commonly used
A
Sched 40
5
Q
What material are used for fabrication of fittings in gas
A
- Malleable Iron
- Forged steel
- Cast Iron
- Special Alloy
6
Q
Class 150 Fittings
A
150 fittings are used on gas line and air lines up to 2” (50mm)
7
Q
STD
A
Standard
8
Q
XS
A
Extra strong
9
Q
XXH
A
Double Extra Strong
10
Q
XH
A
Extra Heavy
11
Q
XXS
A
Double Extra Strong
12
Q
Sch
A
Schedule
13
Q
List 3 problems of unremoved burr
A
-Pressure loss due to flow restriction
- Localised erosion due to turbulent flow
- pipe blockage caused by material hanging up on the burr
14
Q
What is the main advantage of lubrification of the thread
A
Allow for better tightening
15
Q
Where should Teflon be applied
A
Male Thread
