Tool for measuring the scale formation inside a pipe

Hello Guest,

As the scale builds up, the outside surface of the pipe will be cooler, and the volume of transmitted steam will be reduced, as the effective pipe diameter decreases.

So there is an easy method and once you have done the job a few times, you will have a set of characteristic Tables for the Installation, which makes for easier diagnosis thereafter.

Kind Regards....

Try these people.

http://www.cuesinc.com/OZII-LaserDiodes.html

Thank you for the information.

Yes, there are two options - one if the pipe is water filled - sonar and if not - ring laser

Both are very effictive

drop me a line if you need to know more

An option I've used to inspect the inside of superheat tubes in package boilers is a remotely controlled video probe. I recorded the output to dig video. I wrapped electrical tape at one foot increments along the cable housing and counted the measurements aloud while recording the video, which provided a distance measurement that corresponded with what I was seeing on the video. This also allows for reevaluation of internal tube conditions by others that can't fit through an 11x15 inch elliptical manway into a mud drum.

You will, however, be limited to a fairly short distance as the practical length of the remote probe has reasobable limitations. (20m-30m., as I remember)

You can try looking for Welch-Allyn equipment to start, if you are interested.

It isn't the cheapest option, but if this is a tool that can be used on other projects, then it will pay for itself in no time.

We recently had a similar problem on our 850 steam line to one of our turbines. We found the problem was occurring from a leaking dolezal tube at one of our boilers. I would suggest a thorough water flush and then do a fiber optic inspection. We do our own inspection on shorter runs of pipe but hire a contractor for the longer runs. On our particular case the water flush helped allot once we stopped the source. There are several companies that can do a caustic chemical clean to the piping much like you would do to a boiler every few years. I am not sure the name of the company we used a few years ago when we commission our fluidized bed waste fuel boiler but if you need it I can find it for you.

pipewelder

Further to the comment bt Ttressler, for small bore pipework yes video endoscopes like the Welch Allen ( now called Everest) part of GE's portfolio or Olympus also make them, are very useful and stereoscopic measurement tips can be fitted - they do however require trained users

The most common method of checking for scales is by measuring the tube thickness(wall thickness). All one needs is a Ultrasonic Thickness Measurement Meter. Model DM4 from Krautkramer is a good starting point. Check on www.krautkramer.com.

Why don't you use thermograph.