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what is the difference between inside diameter and normal pipe size?
Inside diameter is the actual measurement between inside walls and is approximate of the inside diameter
what is the difference between black iron pipe and galvanized?
Black iron pipe has a shellac or varnish applied for protection, galvanized, iron pipe, has zinc, coating applied by hot dipping the black pipe
how do you find out the actual outside diameter of a pipe?
inside diameter plus wall thickness plus wall thickness
what is the approximate percent of carbon in the iron used to produce the following steel pipes, files, cast-iron, sheet steel
Steel pipes .1 to .2 Percent carbon
Files 1.5 Percent carbon
Cast iron 1.8 to 4.8 Percent carbon
Sheet steel .01 to 0.2 Carbon
what does the schedule number of a pipe design designate?
Designate the pressure – stress ratio times 100
what does the term alloy mean when applied to manufactured of Ferraris pipe?
Alloys are metals mixed with iron to produce special qualities in pipe
List three different types of alloy, steel pipe and state the alloy mall use
Copper bearing alloys minimum 0.25% copper stainless steel chrome and nickel chrome – Molly Dash chrome and Molybdenum
List for common and finishes apply to a steel pipe
Plain beveled, threaded, threaded, and couple grooved
List for common service finishes applied to steel pipe
Galvanized, yellow jacket, asphalt, pickled, and oil painted
The distance from the crest of one thread to the crest of the next thread is Called
Pinch of the thread
difference between male and female threads
Mouth red, external female threads are internal
The thread cut was standardizes on the outside wall of the pipe is referred to as
Male taper thread or MIP Male, iron pipe thread
how many hand turns and how many turns by wrench when tightening a fitting onto a pipe
4 to 6 times by hand 2 to 3 by wrench
why are pipe threads tapered and how much that does a taper amount to if the extended 1 foot in length?
Pipes are tapered so the pipe will tighten into the fitting taper amount is three-quarter increases in diameter at 12 inches
define throw
The distance measured from centre to the face of the fitting
methods of Taking pipe measurements
Send it to centre and to end and to overall and to centre centre to face face-to-face
what is the difference between coupling and thread protector?
Couplings have tapered threads thread protectors, have parallel threads
List four reasons for flushing oil over a pipe thread that is being cut
To cool the chaser, die, and pipe to flush out the swarf chips to lubricate to provide a good finish
Bird should be removed from the inside wall pipe this three reasons they can cause mishaps if not removed
Pressure loss due to increase flow restriction, localized erosion due to turbulence flow pipe blockage caused by material hanging up by little white mice
if a galvanized pipe is threaded is the thread protected by the galvanization
No, the zinc or galvanization coding is removed from the Pipes outer surface by threading
describe the procedure to dreading
Measure mark cut ream oil and thread apply clean compound and tighten