topic 3: pipes and fittings Flashcards
_____ is the most popular and generally specified material for drainage installation.
cast iron pipe (CIP)
Cast Iron Pipe commercial length: ____
600cm
Cast Iron Pipe diameters: _____
50 - 150mm
_____ is affected to some extent by corrosion by acid formed by carbon dioxide, sulfur oxide, and methane gases that create rust.
CIP
_____ are durable and conveniently installed (<25 storey)
CIP
What are the 2 types of CIP?
SV type, XH type
_____ is generally used for building installations.
SV type
____ is extra duty for underground installations.
XH type
CIP is connected through ____ and ____.
hub and spigot
____ is made of an alloy of cast iron and silicon.
acid resistant cast iron pipe
____ is installed in chemical laboratories, industries and other installations where acid wastes are being discharged.
acid resistant cast iron pipe
The problem with _____ is that it is brittle and cracks easily.
acid resistant cast iron pipe
Acid resistant cast iron pipes brittle and cracks easily, thus horizontal runs have to be supported at every _____ interval to prevent sagging.
1.5m
____ is made of absestos fibers and portland cement.
asbestos pipe
____ is used as soil, wast, ventilation and pipe downspouts.
asbestos pipe
____ is suited for concrete embedment because of similar properties.
asbestos pipe
_____ is one of the oldest materials used for sewer lines. It is highly resistant to most acids.
vitrified clay pipe
_____ because it is made of clay, it is brittle and cracks easily when lain on unstable ground.
vitrified clay pipe
vitrified clay pipe is made in short length of _____.
750mm
_____ is the cheapest of all types of pipes.
bituminous fiber sewer pipe
_____ is light in weight, sloightly flexible and can take slight soil movement without danger of cracking or pulling out of its joint. It is thus suited for house sewer and septic taks installations.
bituminous fiber sewer pipe
____ may be softened/damaged by excessive hot water on chemical flow.
bituminous fiber sewer pipe
_____ is made out of mild steel and expected to last 15 to 25 years.
galvanized steel pipe
____ is subject to deposits of salt and lime.
galvanized steel pipe
____ comes in several commercial sizes: 10 (3/8”), 13 (1/2”), 20 (3/4”), 25 (1”), 32 (1-1/2”), 38 (1-1/2”), 50 (2”), 75 (3”), 100 (4”).
galvanized steel pipe
_____ is the most expensive material for piping.
brass pipe
____ is amde of an alloy of zince (15%) and copper (85%).
brass pipe
____ is resistant to acids and has a smooth interior surface.
brass pipe
_____ is better than steel pipe for plumbing installation.
galvanized wrought iron pipe
____ is more resistnat to acid wastes.
galvanized wrought iron pipe
____ the oldest pipe used for plumbing systems. Is highly resistant to acid.
lead pipe
____ is poisonous and injurious, is therefore not recommended to convey water for human consumption.
lead pipe
_____ is durable and extremely corrosive resistant. It is easy to install; smooth interior surface.
copper pipe
What are the 3 classifications of copper pipe?
K type, L type, M type
____ is the heaviest and is recommended for underground installations.
K type (green stripe)
____ is lighter; available in both rigid and flexible form. Recommended for water supply line and radiant heating installations.
L type (blue stripe)
____ is the thinnest; available only in rigid form. For small water supply lines and radiant heating installations.
M type (red stripe)
Plastic/synthetic pipe was developed in ______.
Germany in 1935
_____ are the superior type of pipe because it weighs less, is easy to cut, is flexible, has asmooth interior surface and is cheaper than steel.
plastic/synthetic pipes
What are the 2 types of plastic/synthetic pipes?
rigid type (pipes), flexible type (tubing)
Give 6 examples of rigid type (pipes) plastic/synthetic pipe.
- PVC (Polyvinyl Chloride)
- cPVC (Chlorinated Polyvinyl Chloride)
- uPVC (unplasticized Polyvinyl Chloride)
- ABS (Acrylonitrile Butadiene Styrene)
- PP (Polypropylene)
- SR (Styrene Rubber Plastic)
Give 2 examples for flexible (tubing) plastic/synthetic pipe.
- PE (Polyethylene) - coil 30m
- PB (Polybutylene) - coil 30-150m
What are 4 consideration in choosing materials?
- quality and durability
- resistance to external and internal contact with foreign matters
- resistance to acid wast and other chemical elements that will pass into it
- cost of materials and labor
CI
cast iron
CL
centerline
CO
cleanout
CW
cold water
COP
copper
DW
dishwasher
FD
floor drain
GAL.I
galvanized iron
HB
hose bibb
HW
hot water
LT
laundry tray
LAV
lavatory
MC
medicine cabinet
PLAS
plastic
PLBG
plumbing
WC
water closet
WH
water heater
WS
water softener
______ perform pressure test on joint and connections of pipes and fittings to ensure gastihgt and watertight connections.
tightness
What are the 6 types of joints?
- threaded joints
- spigot and socket joint
- soldered joint
- welded joint
- flanged joint
- grooved joint
_____ means pipes are connected by screwing with the help of thread provided for each pipe.
threaded joint
What are the 4 pipes that are available with threads?
- CIP
- copper pipes
- PVC
- G.I pipes
Threads are available from ____ diameter to ____ diameter pipes.
6mm; 30mm
Why are threaded joint prefereably for low temperature?
the joints may expand and leaked due to the thermal expansion
Tape is acceptable to use on ____.
threads
The ____ end typically has the same outer diameter as the pipe and is usually fitted into another joint called a bell or socket.
spigot
This type of joint is mostly used for ____.
CIP
_____ are material-closed joints (bonds) of two solderable metals.
soldered joint
What are the different forms of soldered joints?
wire-to-wire joints; cross or hook joints
wire-to-wire joints are ____.
parallel
cross or hook hoints as well as soldered joints with _____.
twisted wires
_____ are mechanically connected by the solder only and, therefore, can be more easily detached.
parallel and cross joints
______, also call butt welds, are weldments that are commonly used when joining similar piper together.
groove welded joints
____ can also be used to join pipes to valves, fittings, and flanges for a secure attachment.
welded joint (butt welded, socket welded)
A ____ is a method of connecting pipes, valves, pumps and other equipment to form a piping system.
flange
____ also provides easy access for cleaning, inspection, or modification.
flanged joint
____ are usually welded or screwed.
flanges
____ are made by bolting together two flanges with a gasket between them to provide a seal.
flanged joints
When two pipes are joined together by maiing grooves (narrow cuts or depressions) at the end of pipes with the help of sockets or couplings, such joint are called _____.
grooved joints
______ are mostly used for fire protection because it can be easily uninstalled and reinstalled frequently for maintenance.
grooved joint
What are the special joints?
- expansion joints
- slip or union joints
What are the two tests for pipes for inspection and tests?
water testing, air pressure testing
___ is conducted by closing all outlets and filling the system with water from the main to locate leaks and other potential problems.
water testing
_____ is used in detectinng leaks by filling the piping system with compressed are (use of soap suds in locating escaping air).
air pressure testing
