CSA W59 WELDING INSPECTOR
LEVEL 1
How many IQI's are to be placed if representing a joint that is over
10" ? - ANSWERS-Two penetrameters are to be placed
How many penetrameters are used for joints under 10"? -
ANSWERS-One hole or wire type penetrameter may be placed at the
joint.
When welds are at transitioning thickness and longer than 10 " how
many IQI's are required and where ? - ANSWERS-Two IQI's are
required on the thinner plate and one on the thicker.
How is the penetrameter placed when the radiograph represents less
than the outer edge being shot ? - ANSWERS-IQI wires shall be
perpendicular to the joint with the smallest wire on the outer edge
What side of the joint are the penetrameters usually placed on ? -
ANSWERS-The side closest to the source
How much film must protrude on either side of the joint ? -
ANSWERS-12mm (1/2") of film
What is done to check for back scatter radiation ? - ANSWERS-A
letter "B" 12mm (1/2") is placed on the back of the film.
,What are some defects that will render a film inaccurate ? -
ANSWERS-fogging, processing marks (streaks), scratches, loss of
detail, false indications.
What information is to be shown on the radiograph? - ANSWERS-
Owners contact ID, Initials of the radiograph company, initials of the
fabricator, shop order number, radiographic ID number, date, and
weld repair number if applicable.
What is the maximum angle that the radiation can bet shot on ? -
ANSWERS-26.5deg from the plane of the weld.
What are the minimum thicknesses recommended for both isotopes IR
192 and CO 60 - ANSWERS-IR 192 - minimum thickness 1/2"
(12mm), CO 60 - 1 1/2" (38mm)
What is the range of thickness that ultrasound may be used on ? -
ANSWERS-8mm - 200mm (5/16" - 8")
When "spot radiography" is used in place of ultrasound on ESW or
EGW welds 50mm (2in) and over to find piping porosity how long
should the film of each spot be ? - ANSWERS-Spot should cover at
least 100mm (4in)
What type of instrument is used for ultrasound of welds? And what
frequency does it operate on ? - ANSWERS-Pulse - echo type, 1 - 5
Mhz
, What are the specified angles used in angle beam search units ? (pitch
and catch technique) - ANSWERS-70, 60 and 45 deg
What is a prequalified (PQ) CJP groove weld ? - ANSWERS-It is
defined as a joint welded from both sides, or from one side one a
backing, having complete penetration and fusion of weld and base
metal throughout the thickness of the joint.
What are some of the conditions of prequalification? - ANSWERS-
Joints welded with SMAW, MCAW, FCAW, GMAW shall be back
gouged to sound metal.
What are some of the conditions of SAW for PQ CJP welds ? -
ANSWERS-Back gouging on joints having root openings greater than
0
Back gouging if root opening equal to zero but root face not defined
or exceed maximum.
What is a pre qualified partial joint penetration groove weld? (PQ
PJP) - ANSWERS-Having a joint penetration less than thickness of
material.
What is the acceptable amount of porosity in a weld ? - ANSWERS-
Visible porosity <10mm (3/8") in 25mm (1") of weld. <20mm (3/4")
in 300mm (12") length of weld. Any pore shall be < 2.5mm (3/32")
LEVEL 1
How many IQI's are to be placed if representing a joint that is over
10" ? - ANSWERS-Two penetrameters are to be placed
How many penetrameters are used for joints under 10"? -
ANSWERS-One hole or wire type penetrameter may be placed at the
joint.
When welds are at transitioning thickness and longer than 10 " how
many IQI's are required and where ? - ANSWERS-Two IQI's are
required on the thinner plate and one on the thicker.
How is the penetrameter placed when the radiograph represents less
than the outer edge being shot ? - ANSWERS-IQI wires shall be
perpendicular to the joint with the smallest wire on the outer edge
What side of the joint are the penetrameters usually placed on ? -
ANSWERS-The side closest to the source
How much film must protrude on either side of the joint ? -
ANSWERS-12mm (1/2") of film
What is done to check for back scatter radiation ? - ANSWERS-A
letter "B" 12mm (1/2") is placed on the back of the film.
,What are some defects that will render a film inaccurate ? -
ANSWERS-fogging, processing marks (streaks), scratches, loss of
detail, false indications.
What information is to be shown on the radiograph? - ANSWERS-
Owners contact ID, Initials of the radiograph company, initials of the
fabricator, shop order number, radiographic ID number, date, and
weld repair number if applicable.
What is the maximum angle that the radiation can bet shot on ? -
ANSWERS-26.5deg from the plane of the weld.
What are the minimum thicknesses recommended for both isotopes IR
192 and CO 60 - ANSWERS-IR 192 - minimum thickness 1/2"
(12mm), CO 60 - 1 1/2" (38mm)
What is the range of thickness that ultrasound may be used on ? -
ANSWERS-8mm - 200mm (5/16" - 8")
When "spot radiography" is used in place of ultrasound on ESW or
EGW welds 50mm (2in) and over to find piping porosity how long
should the film of each spot be ? - ANSWERS-Spot should cover at
least 100mm (4in)
What type of instrument is used for ultrasound of welds? And what
frequency does it operate on ? - ANSWERS-Pulse - echo type, 1 - 5
Mhz
, What are the specified angles used in angle beam search units ? (pitch
and catch technique) - ANSWERS-70, 60 and 45 deg
What is a prequalified (PQ) CJP groove weld ? - ANSWERS-It is
defined as a joint welded from both sides, or from one side one a
backing, having complete penetration and fusion of weld and base
metal throughout the thickness of the joint.
What are some of the conditions of prequalification? - ANSWERS-
Joints welded with SMAW, MCAW, FCAW, GMAW shall be back
gouged to sound metal.
What are some of the conditions of SAW for PQ CJP welds ? -
ANSWERS-Back gouging on joints having root openings greater than
0
Back gouging if root opening equal to zero but root face not defined
or exceed maximum.
What is a pre qualified partial joint penetration groove weld? (PQ
PJP) - ANSWERS-Having a joint penetration less than thickness of
material.
What is the acceptable amount of porosity in a weld ? - ANSWERS-
Visible porosity <10mm (3/8") in 25mm (1") of weld. <20mm (3/4")
in 300mm (12") length of weld. Any pore shall be < 2.5mm (3/32")
