3rd Flashcards
CSA welding standard
W59
CSA standard for companies
W47.1
What does w59 have to off set costs of making a welding procedure?
A number if preferred qualified welding procedures
What is creep?
Molecules start to shift at higher temp
Advantages of standardize
Increased quality and reliability
Cwb difference between class and classification?
Classification: refers to T,S,FW,ASW, OR WT (t open root, s with backing for example)
Class refers to position
CWB how wide are each specimen?
38 mm
How big is the cwb gap between plates
2G : 8mm
Others 13 mm
What gets a vessel excluded from absa
Not exceeding 15 psi
Not exceeding 6 inches
What is the best process for ship building?
SAW
ASME boiler code section
VIII
ASME section on non destructive testing
V
Can the quality of steel welded to a boiler be of different quality.
Must be at the same quality
Tapered transition ratio
3:1
Temp your not supposed to weld below
-18
CSA standard for piping systems
Z662 underground
B31.3 above ground (asme)
Minimum pressure vessel thickness
1.5 mm/ 1/16th “
Out of roundness max between in and out diameter
1%
Min pressure for hydrostatic test on a vessel? On pipe
1.3x
1.5
max allowable working pressure
Welder performance qualification form
Qw-484
Welding safety csa #
117.2
Codes for storage tanks
Api 650
Csa standard B51 covers
Boilers and pressure vessels
Stress calc formula
Brinelle test: how big is the hardened steel ball?
10 mm
Fatigue test measures
The ability of a material to withstand repeated loading or unloading
Endurance limit :
The max dynamic load a material can handle through infinite cycles without breaking
Creep tests:
Test low stress over long periods of time usually at elevated temps
Most important destructive test for industry
Tensile test
Steels modulus of elasticity
30,000 lbs/ square inch
Destructive testing yields 2 types of data, what are they n definitions
Quantitative: numbers, ect
Qualitative: taste, appearance, ect
Nick break test is used for
Check the interior of a weld for flaws such as lack of fusion, porosity, slag inclusion
Most impact tests ( eg charpy) measure
A materials impact strength
What test is for softer materials: Rockwell or brinell?
Brinell
Difference between elastic and plastic deformation?
Plastic doesn’t go back
According to api 650 welding procedure specifications must conform to
ASME section IX
Csa standard B51 covers
Boilers and pressure vessels
What asme section deals with welding qualifications
IX
I cubic foot is _____ gal
6.239
