where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
794 views
Technical Discussions
Gowrisanthosh
NDT Inspector,
Royscan engineering pte ltd, Singapore, Joined May 2008, 52

Gowrisanthosh

NDT Inspector,
Royscan engineering pte ltd,
Singapore,
Joined May 2008
52
16:25 May-07-2009
Jack up rig

hi
we have to check the "Chord to Rack" full penetration joint with UT. Pls suggest to me to do the better inspection. Thickness of chord is 95mm and rack thk 210mm.
suggestion will be appreciated.

 
 Reply 
 
J.K
J.K
16:56 May-11-2009
Re: Jack up rig
In Reply to Gowrisanthosh at 16:25 May-07-2009 (Opening).

Hi,

I have done a few type of joint as mentioned, But the thickness of chord used to be from 34 to 40 mm. I have not heared about the 95 mm thick chord.

In our case we used a 22*20 mm crystal 45 degree & , 70 degree 8*9 mm Krautkrammer probes between 0-1 skip.

Regards

J.K

 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
20:41 May-11-2009
Re: Jack up rig
In Reply to Gowrisanthosh at 16:25 May-07-2009 (Opening).

Structural codes generally apply in this application look to AWS D1.1 or API RP 2X for guidance.

 
 Reply 
 
ndestruck
ndestruck
02:08 May-12-2009
Re: Jack up rig
In Reply to John O'Brien at 20:41 May-11-2009 .

you need to be certified to UT TKY API RP 2X specs to carry out this particular job.

Anyway, a 45,60 and 70 degree with a lower frequency and a large diameter probe is appropriate enough to carry out a UT inspection on this thickness.

A Full scan (full skip with a 45 and 60 and a half skip with a 70) is carried out on the chord section. And a 45 full skip scan is carried out on the Rack section particularly looking for toe and root cracks

 
 Reply 
 

Product Spotlight

On-Demand Webinar: Advanced Ultrasonic Techniques for HTHA Detection & Assessment

In the Oil and Gas industry, High Temperature Hydrogen Attack (HTHA) can occur in steels operating a
...
t high temperature, usually above 205°C (400°F). Early stages of HTHA are very difficult to detect. Join us for a webinar presented by Guy Maes, Zetec Sales Engineer Director. The webinar will demonstrate how advanced ultrasonic techniques are deployed for efficient and reliable HTHA inspections.
>

PAUT Probes

Typical Phased Array probes have frequencies between 1MHz and 20MHz and the number of wafers is 10
...
to 128. M2 Electronics offers customers conventionally ultrasound probes and the ability to provide high-precision Phased Array Ultrasound Probes of up to 256 wafers. We can also customize the probe for our customers to meet the specific application requirements of the user.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

VeeScan AirCraft Wheel Inspection

The VEESCAN offers maximum flexibility, has a proven mechanical design and records of breakdown-fr
...
ee operation of over 365 days. Appealing to companies in the Aerospace industry, the VEESCAN is ideal for all wheel-testing environments. With a wide selection of probes, the VeeScan allows your wheel testing facility the flexibility to select the most compatible configurations with their workload.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window