Tuesday, 21 March 2017

Tired of Removing Paint to Inspect Welds?

Removing Paint is Time Consuming and Expensive

For decades, legacy NDT methods, such as penetrant and magnetic particle inspection, required that paint be removed from parts before they could be inspected. The paint was often removed using harsh chemicals. Over time, increasingly strict government regulations about chemical safety and waste treatment have caused the cost of paint removal to rise dramatically. As the cost of paint removal increases so does the overall cost of inspection.

Inspect Through Paint with Dynamic Lift-Off Compensation Technology

The use of a flexible PCB probe with cross-wound coil technology combined with dynamic lift-off compensation makes it possible to detect surface-breaking cracks through paint, resulting in significant time and cost savings.

The principle of dynamic lift-off compensation.

Our MagnaFORM™ probe features dynamic lift-off compensation and helps make weld inspection fast and efficient. The dynamic lift-off compensation helps the probe maintain sensitivity to surface-breaking cracks. All of the channels perform lift-off compensation in real time. Now, we can inspect through paint up to 3 mm thick.

The MagnaFORM probe.

The MagnaFORM probe enables you to inspect through painted surfaces.

The MagnaFORM Probe Delivers Results

The example below demonstrates that the MagnaFORM probe provides you with clear images through paint for indications with the same lengths and same depths located on different areas of welded parts. The amplitude of the signals is the same for each location, demonstrating consistent defect detection in all locations.

A C-scan image using a MagnaFORM probe of EDM notch indications at different locations.

Don't spend valuable resources on stripping and repainting surfaces as part of your inspection process. With eddy current array technologyand the advanced features of the MagnaFORM probe, you can inspect welds and surfaces through paint, helping you save time and reduce cost. To learn more,check out this video about the MagnaFORM solution.

Wednesday, 8 March 2017

Applications are Flooding for the NDT Level 2 Shutdown Post for Saudi Arabia

Applications are Flooding for the NDT Level 2 Shutdown Post for Saudi Arabia.

It's Really Painful that plenty of them Claiming years experiencing doesn't know how to calibrate equipment's and whats the basic material configuration. ( Words by the Interview Panel).

Thanking our Hard working Tutors, not receiving any such comments about any single students from Decibel.

Management can feel proud about the Decibel Team for their tiring service for excellence.

Tuesday, 7 March 2017

ASNT NDT Level 3 Preparatory Classes at Decibel Pattambi, Kerala, India

Refresher/ Preparatory Classes for ASNT NDT Level 3 Examination are Conducted at Decibel Pattambi in Regular Schedules. Which are considered to be very helpful for candidates preparing for NDT Level 3 Examination.

According to the words of the participants "Detailed Technological Training and Practical Integration along with Examination based points are actually a great support and positive way of learning"

Our Tutors Not only concentrate on Just Teaching What's for Exam it's really beyond that and we strive to Develop a Quality Level 3 instead of a Certified Level 3 Person.

The Codes & Ethics of Level 3 is an essential topic which we used to taught during the session as a part of commitment to the society.

Friday, 17 February 2017

Sonotron NDT presents on-the-fly defect pattern analysis whilst performing S-Scan material coverage

Sometime it may occur that the dangerous defects do not return the echoes exceeding the threshold level and may not be rejected based on the echo-amplitude evaluation. 

On the other hand the shape of the inhomogeneity on the cross-sectional image obtained through S-Scan coverage and the echo dynamic analysis may lead to suspecting a crack and rejecting the defect Sonotron NDT‘s portable ultrasonic PA instruments ISONIC 3510, ISONIC 2010, and ISONIC 2009 are featured with the ability of on-the-fly defect pattern analysis whilst observing the live cross-sectional image of the suspected section of the material.

The pattern analysis is performed through on-the-fly embedding and implementing additional focal laws into the running sequence with the purpose of receiving and analyzing of complementary echoes from the insonified inhomogeneity.

The said complementary signals carry the additional data required for identifying the defect under evaluation.

The instrument screen video illustrates the process of identifying the defect returning low amplitude echoes for the weld containing internal vertical crack and inspected through S-Scan coverage:

Thursday, 9 February 2017

PCN Level 2 in PAUT & TOFD Classes at Regular Session

Decibel's PCN Training & Examination Division will be offering Regular PAUT & TOFD Session from March 2017 Onwards at a most competitive pricing.

Special 2017 Pricing will be applicable for Pre-Booking Candidates for PAUT & TOFD.

Interested Candidates may Contact us at the Earliest

Friday, 11 March 2016

How You can weld nickel aluminium bronzes?

How You can weld nickel aluminium bronzes?

Aluminium bronzes are copper alloys containing, amongst other additions, up to 14% by weight of aluminium. Nickel aluminium bronzes are a subset aluminium bronzes which also contain nickel and often iron and manganese. Nickel aluminium bronzes are generally stronger than other aluminium bronzes and possess a two phase (duplex) microstructure.

Nickel aluminium bronzes possess an alumina surface oxide that gives good corrosion resistance, however, this oxide can cause inclusions and other flaws during welding, if entrapped in the weld metal. Interpass and preweld cleaning must be employed to avoid this. As with all welding, general surface cleanliness will improve the quality of the weld.

All aluminium and nickel aluminium bronzes undergo metallurgical changes in the HAZ and weld areas following welding which may lead to deleterious effects on the corrosion properties of the component. Depending on the severity of the service conditions, a postweld heat treatment may be advisable.

Techniques for welding Ni-Al bronzes

Gas shielded techniques such as TIG (or gas tungsten arc welding (GTAW)) and MIG (or gas metal arc welding (GMAW)) are the recommended methods for joining these materials. These methods limit the oxidation of the weld pool and, by the action of the arc, disperse surface oxide. TIG and MIG may both be used for the root pass and fill, MIG being generally faster, but of a lower quality. Pulsed MIG welding may give improvements in controllability. Pure argon, pure helium or mixed argon/helium shielding gases are normally used.

Manual metal arc (MMA) (or shielded metal arc (SMA)) welding is also possible but results may be less satisfactory than for gas shielded techniques. Care must be taken not to cause surface oxide and/or slag entrapment.

Matching filler metals are normally selected when welding Ni-Al bronzes. Standards for consumables include: British Standard BS EN ISO 24373:2009 'Welding Consumables - Solid Wires and Rods for Fusion Welding of Copper and Copper Alloys - Classification'; AWS A5.6/A5.6M: 2008 'Specification for Covered Copper and Copper-Alloy Arc Welding Electrodes'; and AWS A5.7/A5.7M: 2007 'Specification for Copper and Copper-Alloy Bare Welding Rods and Electrodes'.

To Know More Details on Technology
Contact us or Enroll for the Welding Inspection Courses at Decibel.

Monday, 7 March 2016

How can the lack of fusion defects be prevented ?

How can the lack of fusion defects be prevented ?

  • use a sufficiently wide joint preparation
  • select welding parameters (high current level, short arc length, not too high a welding speed) to promote penetration into the joint side wall without causing flooding
  • ensure the electrode/gun angle and manipulation technique will give adequate side wall fusion
  • use weaving and dwell to improve side wall fusion providing there are no heat input restrictions
  • if arc blow occurs, reposition the current return, use AC (in MMA [SMA] welding) or demagnetise the steel

Join For PCN Welding Inspector Level 2 Program for Knowing More on Welding Technology and It's Details