Industrial Piping Flashcards
Transit pipe is also known as
Asbestos cement
Insulation must be used on surfaces within normal reach a building occupants at which of the following temperatures?
140°
When the nominal wall thickness of a pipe is not known, the pipe is measured at
1/4 points on one end
In new liquid pipeline construction for hazardous materials, the manufacturers specifications must be marked on the wall of the pipe which is at least ____ in diameter or larger
4”
To ensure proper compaction around piping, trenches shall be backfilled with clean earth in thin layers to at least ____ inches above the top of the pipe thereafter deeper layers are permitted
12
When liquid transportation pipelines that convey hazardous substances are installed underground in an industrial area, the distance from the top of the pipe to the ground level must be a minimum of ________ inches for normal excavation
18
What material must not be used in low pressure steam and hot water piping?
Aluminum
Which is not an approved material for use in a natural gas piping system?
Copper
What is the minimum airgap required when potible water is discharged into the drainage system?
2 pipe diameters not less than 1”
When it is impractical to test 100% of the days girth welds made on a liquid transportation pipeline for hazardous substances, no less than _____ shall be non destructively tested if the pipe is run within a railroads right of way
90%
Each valve installed in a liquid pipeline system for hazardous substances must be ____________ tested?
Nondestructively
Low pressure steam heating valves up through two inches in size must have bodies of steel, malleable iron, or?
Brass
Plastic pipe used to convey gas can be placed how deep underwater?
200’
Any below ground structure used in a propane transmission system must have?
Forced ventilation provided that prevents accumulation
When preparing pipe for welding, the bevel angle is approximately ______ from level
30°
Excluding exceptions, under what conditions may nonmetallic conduit not approved for direct burial be used for an underground 12.5KV insulation.
Non metallic conduit not approved for direct burial
For a T-weld or fillet weld that will not distort parent metal should?
Use a chill ring
Each valve other than a check valve in a liquid pipeline for hazardous substances must be equipped with?
An indicator which clearly indicates when the valve is open or closed
Zinc coating (galvanizing) on metallic fuel gas piping installed below ground
Is NOT adequate protection against corrosion
Joints in black wrought iron steam or hot water piping which are embedded in concrete shall be?
Welded
Which is not required to be marked on new 8 inch diameter pipes that will be used to convey hazardous substances?
The stress level of the pipe
Process piping shall withstand the required pressure test for a period of no less than ________ minutes after all piping is installed
10
When a natural gas transmission pipeline is installed underground, it may not be installed closer than ______ inches to any other pipeline or structure
12”
Each transmission line must have secondary block valves installed at each point on a pipe line within ____ miles of transmission line valve in a class III location
4
When using cast on pipe in the construction of a natural gas transportation line, each caulked bell and spigot joint _________________
Must be sealed with mechanical leak clamps
Pressure relief valves on water distribution lines shall be set to limit the maximum pressure to no more than _____ PSI
100
What percentage of the welding procedures used during welding qualification test must be recorded?
100%
Each gas main that will be operated at pressure above 1 P.S.I.G. shall be tested at a pressure of ________P.S.I.G.
90
Which of the following is not an advantage of hydraulic shoring over the use of screw jacks?
The pump cylinders are all activated at the same time
On Corporation stop, where does stop come off the mainline of the sewer?
2-10 o’clock
When connecting J-M big blue pvc pipe to mechanical joint or flanged fitting, it is recommended to?
Use a blunt end of the pvc pipe
When laying slip ring pipe it is necessary to
lubricate the spigot end before connecting together
An orifice meter is in line and begins to pulsate. You should __________?
Move the meter
A cathodic protection system must be installed no later than _______ after construction is completed for liquid transportation pipeline that will convey hazardous substances
1 year
When taping J-M Big Blue water pipe, what is the maximum outlet size recommended with service clamps or saddles?
2
The marking on a pipe is ABC API 14.00 49.93 AS. Identify 49.93.
Weight per linear foot
The grade stake who’s top indicates a reference grade is called a
Hub
The orifice meter measures?
Volume
If a pipe is stamped MEE this would mean?
Pipe is milled on each end
When tunneling is permitted for outdoor piping, there should be at least _____ feet of clear height above the pipe
2
Underground vaults used as a pressure reducing station must be ventilated if the internal volume of the vault exceeds?
200
When installing used pipe in a liquid transportation pipeline for a hazardous substance, what percent of the old girth welds must be given a nondestructive test?
100%
Where local water pressure exceeds _____ PSI, a pressure regulator shall be installed to reduce the pressure to an allowable limit
80
The grade stake whose top indicates a finished grade is called
Blue top
The class 1 location for a natural gas pipeline is a location that has?
10 or less building intended for human occupancy
The joint compound approved for use in a fuel gas piping must be applied to the ______ and must be _______ in fuel gas
Male thread only and insoluble
To clean stainless with a mixture of nitrogen prior to installation is called?
Pickle
Which soil compaction test uses a test rod in a 1/2” hole 12” deep?
Nuclear
All pipes entering into a vault must be steel for any pipe that is ______ inches or less in diameter
10
A backflow prevention device for a boiler shall be installed at least
12” above the surrounding ground
What is used to clean out a pipeline?
Pig
When installing J-M big blue pvc water pipe, the manufacturers recommend thrust blocking at all of the following locations except?
At joints where different types of pipe are connected
Before using rolling equipment over the top of J-M big blue water pipe, a minimum of ______ inches of backfill material should be placed over the top of the pipe?
18
Which of the following taps may be made into 4 inch cast-iron pipe without reinforcement?
1 1/4”
Compaction with water from a hose works best in?
Granular BF in granular soil
The first weld pass on a pipe weld is called
Root pass
According to the code of federal regulations “nominal wall thickness” means?
Wall thickness listed in the pipe specifications
Which is the most heat resistant piping?
Wrought iron
A relief valve is usually used with?
Ball valve
