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 -

1159 views
Technical Discussions
Justin Cavanagh
Justin Cavanagh
00:20 Apr-10-2007
UT of cast iron at elevated tempratures

Has anyone got any advise for thickness inspections of cast iron valve bodies at elevated temps 280 degrees for example ???


 
 Reply 
 
Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
07:26 Apr-10-2007
Re: UT of cast iron at elevated tempratures
What is the maximum thickness that you need to measure? Generally, the best approach for that test would be to use a high temperature dual element transducers. Cast iron is grainy and produces a lot of scatter noise, but you should be able to measure more than 50 mm/2 inches at 2 MHz with an appropriate instrument.

Some general tips on high temperature ultrasonic testing can be found in the attached application note.

----------- Start Original Message -----------
: Has anyone got any advise for thickness inspections of cast iron valve bodies at elevated temps 280 degrees for example ???
------------ End Original Message ------------




 
 Reply 
 
Justin Cavanagh
Justin Cavanagh
03:44 Apr-10-2007
Re: UT of cast iron at elevated tempratures
The casting is about 50mm I have run a 2mhz probe over it when cold and found it effective. I was thinking that would be a good way to go sounds like I am on the right track. Will just have to buy a high temp probe.
Emat probes have also been sugested for this aplication.

----------- Start Original Message -----------
: What is the maximum thickness that you need to measure? Generally, the best approach for that test would be to use a high temperature dual element transducers. Cast iron is grainy and produces a lot of scatter noise, but you should be able to measure more than 50 mm/2 inches at 2 MHz with an appropriate instrument.
: Some general tips on high temperature ultrasonic testing can be found in the attached application note.
: : Has anyone got any advise for thickness inspections of cast iron valve bodies at elevated temps 280 degrees for example ???
------------ End Original Message ------------




 
 Reply 
 
Borja Lopez
Director
Innerspec Technologies, USA, Joined Jun 2002, 36

Borja Lopez

Director
Innerspec Technologies,
USA,
Joined Jun 2002
36
04:16 Apr-11-2007
Re: UT of cast iron at elevated tempratures
----------- Start Original Message -----------
: Has anyone got any advise for thickness inspections of cast iron valve bodies at elevated temps 280 degrees for example ???
------------ End Original Message ------------

This could be a good application for EMAT. Please visit our website for additional info www.innerspec.com


 
 Reply 
 
Massimo Carminati
Massimo Carminati
03:24 Apr-12-2007
Re: UT of cast iron at elevated tempratures
As an alternative to a dual element high temperature probe (a very good one is the d797 panametrics, but the temperature is critical). I've had excellent results using a 2MHz BB single element with a Vespel delay line with a proper delay.



 
 Reply 
 

Product Spotlight

Cygnus 6+ PRO Multi-Mode Ultrasonic Thickness Gauge

The Cygnus 6+ PRO thickness gauge is the most advance gauge within the Cygnus range with key featu
...
res including: comprehensive data logging; A-scan and B-scan display; manual gain control; Bluetooth connectivity; and much more. With its unique dual display and three measuring modes (Multiple-Echo, Echo-Echo and Single-Echo), this surface thickness gauge offers maximum versatility for inspections.
>

Extended Range Variable Wall® Piping Calibration Blocks for Longseam Inspection

This set of two blocks has been specially designed for situations where ultrasonic examination tak
...
es place circumferentially or “around the curve” for applications such as inspection of longseam welds in piping and vessels. Jointly designed by PH Tool and Holloway NDT, the blocks feature side-drilled hole reflectors positioned within novel compound-curves, each with multiple thickness steps. The unique design results in a light and compact form factor, with the largest block weighing just over 15 lbs and spanning just 16 ¾”. Coverage is provided for nominal pipe sizes from 6” to 10” in the small block and 12” to a whopping 56” in the large block. The compound OD curves and multiple wall thicknesses actually exceed ASME requirements, providing exceptional signal response and measurement accuracy. Properly managing beam divergence off the ID and stabilizing beam skew due to probe rocking is essential to maintaining a consistent calibration when inspecting lengthwise on curved surfaces.
>

ISAFE3 Intrinsically Safe Sensor System

ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica
...
l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A.
>

Portable Ground Penetrating Radar - Proceq GP8000

The Proceq GP8000 portable ground penetrating radar instrument is the beginning of a new era in ND
...
T. The outstanding, patented ultra- wideband technology combined with a compact wireless probe delivers unmatched industry performance. Proceq GP8000 is the world’s first large-scale inspection solution that utilizes Augmented Reality in industrial applications.
>

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