345 Flashcards
Which method is used to measure a pipe with a fitting at one end?
End to center
Which of the following displayed symbols describes a flanged tee?
C
What type of flange is used to seal the end of a pipe?
Blind
Given the drawing and information below, calculate the face-to-face distance between the fittings
5ft 5.5in
Given a 45° straight offset, with a 41-in. travel, a center-to-face elbow dimension of 2-in. and a 3/4-in. thread length, what is the end-to-end pipe length?
38.5
Straight internal pipe threads in pipe couplings are represented by the code letters
NPSC
In complete pipe specifications, code letters are preceded by two numbers which indicate the
nominal pipe size and number of threads/in.
The distance from a given point on one pipe thread to the same point on the next thread, measured parallel to the pipe centerline, is called the
Pitch
You need to replace a threaded pipe between 45° elbows in a straight offset. The set is 5 ft, and the travel is 7.0 ft. The center-to-face dimension of each 45° elbow is 2 in., and the pipe’s thread length is .75 in. The total end-to-end length of the replacement pipe is
81.5
Ratchet threaders can be used on pipe up to about ___ inch in diameter
6
Socket-welding fittings are used for joining pipe of what diameters?
4 inches or less
Backing rings should always be made of
material compatible with the pipe material
Squareness is a term indicating that a pipe forms a ____ angle with another
90
The major assembly consideration when fabricating flanged connections for a rolling offset is
Aligning the holes
The usual gap between pieces of pipe to be butt-welded is approximately
3/16