Steel Pipe Flashcards
Define Piping
A system of pipes used to move fluids from one location to another.
How long has piping been used
Thousands of years
How did Agriculturalists use piping ?
To divert water into fields.
What kind of piping was used in 2000 BC China?
Reed.
When was lead piping first used?
First century AD Europe.
How far back can welded pipe be traced?
Early 1800’s.
How were first seamless metal pipes made?
Drilling a hole through the center of a solid cylinder.
Name 5 ways steel, cast iron, and copper pipes are used.
Drains, Wastes, vents, waterlines, processing pipes.
What is the newest material used for piping?
Plastic
How long has plastic been used for piping?
40-50 years.
When choosing piping material name some factors that must be accounted for.
Temperature, pressure, jointing method, pipe support method.
Liquid gasses or solid matter being transported? (Corrosive resistance)
Specifications, fire rating
What are most steel pipes made from?
Carbon Steel
What range of dimensions do steel pipes come in?
1/8” to 12’
What measurement are pipe sizes known by.
Nominal Pipe Size
What does N.P.S stand for?
Nominal pipe size
What does I.P.S stand for?
Iron Pipe Size
How are pipes larger than 12” known by?
Actual outside diameter (O.D)
What does O.D stand for?
Outside Diameter
What diameter remains constant regardless of wall thickness?
Outside Diameter
Variations is wall thickness affect what diameter?
I.D (Internal diameter)
What does SCH stand for?
SCHEDULE
Name the SCH for Light wall pipe
5,10,20, 30
Name SCH for Standard wall
SCH 40
Name SCH for Extra Strong wall
SCH 80
Name SCH for extra strong or double extra heavy
SCH 160
What is STD
Standard Wall
Abbreviation for extra strong
XS
Abbreviation for double extra strong
XXS
Abbreviation for double extra heavy
XXH
Name 3 methods of steel pipe wall construction.
Butt Weld
Lap Weld
Seamless
How do you calculate the wall thickness of any pipe?
Outside Diameter minus inside diameter divided by 2
How may Galvanized steel pipe be used?
Drainage System or Venting System above ground inside a building.
What does GSP stand for?
Galvanized Steel Pipe.
If GSP is used in a drainage system what kind of fittings are used?
Drainage fittings.
GSP is not to be used in a water
distribution system with what exceptions?
Buildings of industrial occupancy
For the repair of existing GSP systems
Steel pipe is manufactured in what range of lengths?
19’ - 0” to 22’ - 6”
How long has the threaded pipe joint been used?
More than 100 years
What is the advantage of standardization?
Pipe can be threaded and manufactured in one country and fittings can be produced in another
What is A.S.P.T
American Standard Pipe Thread
What does N.P.S stand for?
Nominal Pipe Size
What does A.P.S stand for?
Actual Pipe Size
What does O.D stand for?
Outside Diameter
What does I.D stand for?
Inside Diameter
What is M.I.P?
Male Iron Pipe
How is a Male iron pipe threaded?
Outside thread
What is F.I.P?
Female Iron Pipe
How is a female iron pipe threaded?
Inside Thread
What is I.P.S?
Iron Pipe Size
Define Running Thread
A long thread made with no taper and used as a nipple chuck
What is a right hand thread?
Normal direction for thread (clockwise)
What is a left hand thread?
Thread is cut opposite direction (counter clockwise)
Name some uses for steel pipe
Natural gas Compressed air Fire protection Heating (steam/hot water) Drains/waste/Vents Repairs to existing systems Water supplies in industrial buildings Process piping
What does DWV stand for?
Drain, Waste, Vents
What is Black Steel Pipe
Protected with varnish or shellac for rust protection
What is Galvanized Steel Pipe?
Zinc coated inside and out for rust protection.
Name 2 methods of Galvanizing
Dipped
Electrolysis
What is stainless steel made from?
Alloy of Iron/Nickel/Chromium
Name the 5 parts of an elbow
Face Throat Back Fitting Allowance Thread Engagement
Fitting allowance is approximately equal to the
Piping Diameter
How is the end of center measured?
End of pipe to center of the fitting
How is Center to center measured?
Center of one fitting to center of another fitting.
How is Face to Center measured?
From the face of one fitting to the center of another fitting
What is Thread Engagement?
The amount of pipe thread necessary to make a tight connection between the pipe and the fitting
What happens if a thread is cut too long?
Pipe will go too far into the fitting.
What happens if a thread is cut too short?
Will not go on far enough and can leak or crack the fitting.
What is the usual practice when cutting threads
Add 2 additional threads to the length past the end of the dies
1/4” and 3/8” NPS have how many threads per inch
18
1/2” and 3/4” NPS has how many threads per inch
14
1”, 1 1/4”, 1 1/2”, and 2” NPS have how many threads per inch
11 and 1/2
2 1/2 “ NPS have how many threads per inch
8
What is the angle on American Standard Pipe?
60 degrees
What range of nominal pipe diameters can use the same die chasers
1”-2”
All sealants must be approved by who?
CSA or ULC
What does pipe dope do?
Helps seal and lubricate threads
Name 2 forms of pipe dope
Stick
Paste
Metallic
Non Metallic
Teflon tape
What Teflon tape is good for all uses?
Pink/White
What color Teflon tape is used for gas?
Yellow
Sealants must not what?
Must not enter into the piping system
What threads are sealants applied to
Make threads
An 18” pipe wrench is a good choice for what diameter sized job?
1 and 1/4 “ or 1 and 1/2”
Never use an 18” pipe wrench for any pipe size less than what?
1”
What size pipe would a 14” pipe wrench be a good choice for?
3/4” pipe and fittings using 41 ft/pd
