Cast Iron, Iron pipe & historic pipe Flashcards
what is glass pipe commonly used for
- corrosive waste for laboratories
- food processing plants
can 6 in Pyrex glass pipe can be used in pressure applications
false
what does a SHCISP mean
single hub clay and iron soil pipe
cast iron has________ to give it strength and ductility
magnesium
what are three types of cast iron soil pipes
no hub, one hub, two hubs
what is a 22.5 degree elbow
1 sixteenth bend
what are all joining methods for hub & spigot cast iron soil pipe
caulked lead
hot poured joints
cold caulked joints
compression joints
what are all types of clean outs one will find in a cast iron soil piping system
line clean out
Barrett clean out
bolt top
screwed top
caulking lead must be _____ pure
99.73%
when tightening mechanical joints, you should torque screws
55-60 pounds per sq in
cast iron soil fittings have pressure rating of
350 psi
cast iron pipe is coated on inside and out with _____ to increase corrosion resistance
bitumen
two methods of cutting cast iron pipe are
snap cutters and hammer or chisel
minimum dimensions of flashing in Alberta
20in x 20in (500mm x 500mm)
when fasteners are to be placed in a wall, ceiling or floor, consideration must be given to
unseen hazards in the base material
what does the term deflection refer to
deviation from the center line or snaking of the pipe between hangers
which screw has the greatest mechanical advantage
sheet metal screws cause the threads are closer
fastener anchor catergories are divided into
light and heavy duty anchors
pipes are supported in order to
4 reasons
carry weight of pipe and contents
help grade the piping system with adequate slope
prevent sagging or deflection
allow thermal movement of the piping system
welded steel brackets are recommended for loads up to 3000 lbs
T,F
true
ready rod comes in what dimensions
quarter, half, three quarter and five eighths inches
oxidation is accelerated by an increase in temperature
T,F
True
electrolysis is corrosion in the presence of very mild acidic water and electrical current generated by the water movement
T,F
True
what is installed to control electrolysis
dielectric union, nipple, bushing
clips and strapping are usually used on pipe diameters up to 4in
T,F
true
which support have the largest capacity for load
beam clamp
snap-in pipe protectors are used for
isolation the piping from steel studs
U-bolt are used for support and thermal expansion of pipe
T,F
true
why are protective coatings applied to hangers
to protect the hangers and piping
clevis hangers are widely used as they can be adjusted
T,F
true
another name for Unistrut
power strut
Can. Plumbing code states
Cast iron pipe not approved for residential service
T,F
False
cast iron pipe has a
high carbon content
no hub soil pipe is joined by
MJ clamp
a one sixteenth bend is equivalent to
22.5 degrees
when installing hub and spigot pipe, the hub is always placed
downstream
cast iron pipes is never used for portable water applications
T,F
False
dust, fumes and chemicals are common hazards associated with ______pipe
fiberglass
common use of lead in plumbing
no longer used
one pound of lead gives you a sheet 1’x1’x_____ thick
one sixty-fourth
historical pipe manufactured from coal tar pitch and cellulose fibers is
bitimus fiber pipe
pipe that will carry all known chemicals except hydroflouric acid is
vitrified clay pipe
aluminum pipe requires what
isolated hangars
transite and century are trade names for _____ pipe
AC
when cutting AC pipe ______ protection is of the utmost importance
respiratory
always ensure you ____ the gasket prior to joining bell and spigot plastic pipe
lubricate
origin of term plumber
lead worker
In what way does Duriron differ from gray cast iron?
Silicon is added, increased corrosion resistance, more brittle and had had a higher rate of expansion
List the weight of cast iron approved for use in Alberta
18 kN
Ductile iron pipe
Adding an inoculate, usually magnesium, additional strength, toughness and ductility
Carbon can be found in cast iron in two ways
Graphite
Chemically dissolved
Characteristics of gray iron
- High resistance to wear
- Good corrosion resistance
- Low rate of thermal expansion
- easily cast at Temp. Around 1315C (2400F)
- poor resistance to shock (fractures easily)
Size and lengths for SHCISP
2”, 3”, 4” and 6”
5’ and 10’
MJ soil pipe size and length
1 1/2”, 2”, 3” and 4”
10’ lengths
What are prime qualities of Oakum and Lead
Extremely rigid, has sufficient flexibility to permit a slight deflection the joint without breaking hub or damaging the seal
Tools and equipment for Oakum and leaf
- Yarning/packing iron
- asbestos pouring rope (running rope)
What tools and equipment are needed to prepare lead for Oakum and Lead
- 99.73% pure lead
- 10-pound notched bars
- 25-pound strings
What temp does Lead have to be at preparation for Oakum lead
327*C
620*F
Cold/damp Lead or moisture on the ladle with hot lead can cause
Lead to explode and may result in possible injury to anyone around
When inserting the spigot end of a pipe or fitting into a hub you need to?
Properly centre and bottom the spigot, to prevent Oakum from being forced into the pipe
Yarn and Oakum does what for joints and pipe
Retains molten lead, seals the joint, centres the pipe and gives the joint flexibility
The weight of Oakum in a joint is
1/10th of the weight of the require lead. Required lead in a joint 3/4 pound per inch diameter
Cast iron water service piping is designed for
Pressure water installations. Raw potable water systems, slurries and process piping systems. May be used for sewage system that have a pressure requirement
Cast iron soil pipe have no
Pressure rating and are used in drainage, waste and vent piping system.
What is the lowest and highest rating on compression or push-on joint
350 psi
Ductile iron pipe push-on joints operating pressure 1000psi
All mechanical couplings used for joining hubless pipe
Must be approved for pressure application
What size of glass pipe is rated at 100 psi
1/2”, 3/4” 1”
What size of glass pipe is rated at 75 psi
1 1/2”, 2”, 3”
What size of glass pipe is rated at 50 psi
4”
