MWA-B Flashcards
what are the 2 major alloys of copper
bronze and brass
how are copper tubes and copper piping different
copper tubes have thinner walls, and are specified by an approximate inside diameter
what colour pipe is allowed to be installed under ground in a drainage system
green or blue
what is it called when a fitting sucks in the solder
capillary reaction
what type copper pipe is the thickest
type k-green
what colour is type L copper
type L copper is blue
what type copper is the thinnest and what is its colour
type m and it is red
what type copper is used in a hydronic heating system
type H and it is white
what colour is type dwv copper
yellow
what type of copper is used in a medical gas system
type L and K
what type of copper is used in a gas system
type g, yellow
what is the most common type of copper used in B.C and why
hard temper type L, because of the water being more acidic
in Canada what is the most common type of copper used
type L and M hard temper
how are copper pipe specified
by their nominal inside diameter
how is copper tubing used in refrigeration sized
directly by its outside diameter
what is the temperature is soldering performed
840 degrees F or lower
what temperature is brazing done at
840 degrees or higher
what is the maximum allowable lead content in solder used in a potable water system
0.2%
what is the purpose of the flux
clean the pipe and prevent oxidization
what type of copper pipe can you t-drill
K and L
what would be required when brazing 2 dissimilar metals
high temperature flux
what is an expansion loop and what must be taken into consideration when installing
an expansion loop, allows for expansion due to temperature change, the loop should be installed so there is no strain when pipe expands and contracts
what are the steps of flaring copper
1) cut the pipe
2) ream the pipe
3) put the nut on the pipe
4) flare the pipe
what are the steps of using a compression fitting on a pipe
1) cut the pipe
2) ream the pipe
3) put the nut on the pipe
4) put the ferrule on the pipe
