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55 Cards in this Set
- Front
- Back
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Plain |
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Threaded |
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Threaded and coupled |
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Beveled....suitable for welding |
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Either cut or rolled groove....cut has material cut out |
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API |
American petroleum institute |
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ASTM |
American societee for testing and materials |
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ASME |
American societee of mechanical engineers |
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AWWA |
American water works association |
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CSA |
Canadian standards association |
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Std |
Standard |
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Xs |
Extra strong |
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Xxh |
Double extra heavy |
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Xxs |
Double extra strong |
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Sch |
Shedule |
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What is the difference between inside diameter And NPS |
Inside diameter is the actual measurement between the inside walls of the pipe NPS is an approximation of the inside diameter and industry standard to identify various pipes |
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What is the difference between black iron pipe and galvanized iron pipe |
Black iron pipe is coated in lacquer and galvanized coated in zinc |
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Which grade of threaded pipe should be used for the following maximum pressures 150PSI 200 PSI and 1000 PSI |
Standard sch 40 extra strong schedule 80 double extra strong |
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What does the schedule number of a pipe designate |
Pressure stress ratio times 1000 |
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What is meant by the term Alloy as applied to the manufacture of ferrous pipe |
Iron mixed with any other metal |
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List 3 different types of alloyed steel pipe and state the alloying materials use |
Copper bearing - Copper
Stainless steel, Chromium and nickel
Chrome/moll- Chromium And molybdenum |
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List four common end finishes applied to steel pipe |
Plain Threaded and coupled
Beveled Grooved
Threaded
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List four common surface finishes applied to steel pipe before delivery |
Lacquered Galvanized
Asphalt Pickled and oiled
Yellow Jacket Painted |
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What is the angle of a national or American standard pipe thread |
60ﾟ |
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The distance by which a fitting advances for one complete turn of the fitting is called the |
Pitch |
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What is the difference between male and female threads |
Mail threads on outside and female threads on inside |
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The thread cut with standard threads on the outside wall of a pipe is referred to a_______or__________ thread. |
Male or external |
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When tightening a fitting on to a pipe the fitting should be turned by hand approximately______to ______ times And made up with the aid of a wrench approximately_______ to _________ turns |
4 to 6 3/4 2 to 3 |
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Why are pipe threads tapered and how much does this taper amount to if extended to 12' in length |
Pipe threads are tapered so that the pipe will be seated into fittings easier. the taper amount is 3/4 of an inch increase in diameter at 12" |
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Define the term throw as it applies to pipe fittings |
The distance measured from the center to the face of fittings |
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List 5 different methods of taking pipe measurements |
End-to-end, center to center, face to face, center to face, and face to center |
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What is the difference between a coupling and a thread protector |
Couplings have cheap forward threads thread protectors have parallel threads |
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This four reasons for Flushing oil over a pipe thread that is being cut |
To cool the chasers Or dies and pipe, To flush out the swarth Or Metal chips, To lubricate, To provide a Finnish |
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The most common fault when cutting a thread is that the crests of the thread are torn off what are the most likely causes of this |
Dull or worn chasers were dies Inadequate oiling |
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Burrs should be removed from the inside walls of pipe list 3 problems that can occur if burrs are not removed |
Pressure loss due to increased flow restriction Localized erosion due to turbulent flow Pipe blockage caused by material hanging up on the burr |
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If galvanize pipe is threaded is the thread protected by the Galvanizing ? explain your answer |
No the galvanized coating is removed from the pipes outer surface by threading and from the internal surface by reaming |
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Describe the accepted procedure for making threaded joints |
Measure, mark, cut, ream, oil and thread, clean and apply compound and tighten |
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Why is jointing compound applied to pipe threads when you are making threaded joints |
Lubrication allows for better tightening |
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When making threaded joints to which thread should you apply the jointing compound and why |
It should be applied to the mail thread only in so that the compound is prevented from entering into the piping system |
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Which reamer is best suited for use with Hand operation only not to be used with the power vice |
Spiral fluted reamer are to be used by hand operations only.
A straight fluted reamer maybe used by hand or on power equipment |
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Indicate the type of lubricating oil you would use on the following types of pipes when cutting threads copper stainless steel brass steel or wrought iron |
Copper - mineral oil Stainless steel - high sulfur content oil Brass - soapy water Steel or wrought iron - thread cutting oil |
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What are fittings used for |
Fittings are used to add branches for changes in direction or to connect sections of a piping system |
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Name four methods of joining pipe |
Threaded, Grooved, flanged, compression, welded |
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What are the 2 main types of steel pipe cutters and advantage / disadvantage? |
Single wheel- small outer bur/ requires 360 turn Multiwheel- used in tight space, large burr and may spiral on pipe |
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What effect does a ridge that forms on the outside of the pipe after cutting have on the latter operation and how is the ridge removed |
Causes dies to be hard to start must remove with a file |
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All pipe fittings have a _____ thread |
Tapered |
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Standard threads are all _____hand threads |
Right |
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When screwing on a fitting it must be turned |
Clock wise |
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Imperfect or torn pipe threads can result in _______ joints |
Leaking |
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Threading a pipe that has been cut with a cutting torch will __________ The life of the dye |
Shorten |
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A bolt is a ______ thread |
Parallel |
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The thread applied to a pipe or fitting is a _________ |
Tapered thread |
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The larger the pipe the _______ Threads per inch to cut |
Less |
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What happens when you apply insufficient oil when cutting threads |
Broken or torn threads |
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What happens when your dies are improperly adjusted |
Too tight or loose threads |
