Dryer Rolls

Longitudinal strips of phased-array ultrasonic thickness measurements can be recorded according with axial data position, then quickly processed to obtain detailed thickness strips, even in Excel data format.

 

Advantages :

• Efficient and detailed thickness mapping
• Data corrected according to the measured ultrasonic velocity
• Deliverable data in Excel format for monitoring progress over time
• Magnetic scanner, also effective for top rolls

To consider :

• Requires some water irrigation to the contact surface

Technician Certifications:

• ASNT, SNT-TC-1A, PAUT
• ASNT, UT Level 3

We have developed a methodology to perform a full internal inspection of the rolls without entering it. Data is captured in 360 video format.

 

Advantages :

• Limit entry into confined spaces in these very restricted accesses
• Capture and recording of the entire internal surface, including damage and their profile for monitoring over time

 

To note :

• May not be applicable to rolls with very limited space near the manhole
• When damage is observed, it is likely that entry into the confined space cannot be avoided to perform a more detailed inspection

The ultrasonic testing method is used for the inspection of bolts in place. It is possible to detect if a bolt is cracked from only one end.

 

Advantages :

• Excellent sensitivity
• Simple and quick to execute

 

To consider :

• The end of the bolts must be essentially flat
• Phased-array UT can be used for more sensitivity

 

Technician Certifications:

• ASNT, SNT-TC-1A, UT, Level 2
• CGSB, UT, Level 1 or 2

Magnetic particles non-destructive testing method is very efficient and simple to perform. It detects defects emerging at the surface in ferromagnetic materials. A magnetic yoke is generally used to create the magnetic field.

Different Techniques:

• Dry powder (yellow or red)
• Black particles on a white background ("black & white")
• Fluorescent particles (in dark environment)

Advantages :

• Fast and effective
• Excellent probability of detection
• Applicable on various geometries
• The dry powder technique is applicable at high temperature

To note :

• Applicable only to ferromagnetic materials
• Detection of surface defects, or very close to the surface, only
• Requires a clean surface (no grease)

Technician Certifications:

• ASNT, SNT-TC-1A, Magnetic Particles, Level 2
• CGSB, Magnetic Particles, Level 2

The non-destructive liquid penetrant testing method is simple to perform, but requires a few successive steps. This method makes it possible to detect cracks or other defects opened or connected to the surface, and is mostly used for non-ferromagnetic materials, such as aluminum or stainless steels.

 

Advantages :

• Simple execution
• Excellent probability of detection
• Applicable on a wide variety of geometries

 

To note :

• Requires a very clean, paint-free surface
• Inspected surface should be rather smooth, difficult to apply on porous surfaces
• More "messy" process

 

Certification of Inspectors:

• ASNT, SNT-TC-1A, PT Level 2
• CGSB, PT Level 2