Detection Of Groove Cracking Without Bolt Dismantling

Many stainless steel flanges used in high pressure and temperature conditions are affected by cracking decreasing the process integrity. Up to now, general penetrant testing has been used for the flange examination but this method needs the dismantling of the flange and reassembly afterwards. In case of standard ultrasonic testing the dead zone generated below the bolt holes is very significant and decreases the effective- ness of inspections. ARYASGS introduces an unique and very advanced inspection technique to inspect ring type Joint (RTJ) flanges for cracks while in-service and without a dead zone.

Inspection Technique
RTJ flange inspection is based on ultrasonic testing which sends ultrasonic waves to the flange top only.
In contrast, the ARYASGS technique also introduces the sound waves obliquely and vertically to the groove face and flange top.
These scanning methods make it possible to cover all of the groove area, including parts below bolt holes.

With the ARYASGS method, flanges larger than 4 inches can be inspected. The time required to inspect one pair of flanges is signifcantly reduced and all unnecessary cost of dismantling and mounting can be prevented unless defects have been found. This technology ideally supports our asset integrity management (AIM) solution to make sure your assets operate safely and efficient.

- Inspection of all the flange groove area
- Unnecessary to dismantle bolts
- Unnecessary to rearrange pipes
- Fast and accurate inspection for critical defects
- Used to determine which flanges need to be opened during turnaround projects
- Can be used in service up to 70 °C

The ARYASGS Experts

ARYASGS industrial services has the knowledge, expertise and experience to perform conventional and advanced NDT inspections around the world using our unique network. Our service offers varies from guided wave and the conventional NDT techniques to risk based inspection (RBI/AIM), time of flight diffraction (TOFD), corroscan, positive material identification (PMI), magnetic flux leakage (MFL), ACFM, leak testing, thermography, electromagnetic testing (ET), RFEC, IRIS, digital radiography, radiation detection, RVI and endoscopy inspections.

We are pleased to provide services to any location around the world, pertaining as to how ARYASGS can help you in improving the reliability of your processes and assets.

NDT Training

ARYASGS established an NDT training and examination center in tehran, with a particular focus on the extensive training syllabus for most of the standard NDT methods.


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میدان توحید - خ نصرت غربی پلاک 19
تلفن: 66434647
فکس: 66424748
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ساعات کاری:
شنبه تا چهارشنبه 8 صبح تا 17 بعد از ظهر


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