Pipe Line Calibration

http://www.ast.cam.ac.uk/~rgm/scratch/hst/DH_201.html

Do you mean this?

Not a standard, but I would not be sure there is one.

Maybe check eso.org

What feature of the pipeline requires calibration, please?

Its a data pipeline I suppose. But what do I know!

There seems to be more than one thing in the pipeline!

A load of websites, probably.

Oh. That again.

Hey, just trying to help out.

I wouldn't want the poor guy to try to use pipe with the hole on the outside.

Did you forget to specify those 'serrations' on the outside surface of the pipe which mate with the serrations on the inside of the couplers, if the piping is not of the 'join-by-melting' type. Serrations shall also be tapered along the long axis of the pipe for a gradual binding effect between pipe and mating fitting; also of a proper depth for adequate connecting strength.

NOTE TO SELF:

ADD SQUIGGLY LINES TO INSIDE AND OUTSIDE OF PIPE; ENDS ONLY.

Calibrated ones, of course...

But this would need a Calibration Engineer and the only one available is asking this question!

Damn!

Would it not be helpful to write "LARGE PIPE" at intervals on the inside of large pipes so if one is crawling through a large pipe he/she will not mistakenly think they are crawling through a small pipe? -- JHF

That might unnecessarily complicate things, since one then would need to also write "top" and "bottom" inside the pipe to insure that the person inside does not try to climb along the top side of the pipe.

They're probably in the tool room next to the BFH.

Ah. Metric or imperial? _{- it might affect the calibration.}

it is metric

You are still on board...good.

What type of pipeline are you talking about?

Dear Member,

In India major OIL COMPANIES are transporting the Petroleum Products through pipe lines for a distance ranging from 1km to 300km.The oil companies wants know the exact product inside the pipeline for which they are insisting for "PIPE LINE CALIBRATION"

V.RAJAGOPAL-TAMILNADU-INDIA

An oil pipe line. Thanks for defining it.

The oil company needs to know the volume of product in the pipe line for stock accounting purposes.

What do the bean counters need +/- 1 litre or +/- 1m³..?

Get the drawings out and start calculating.

Is the pipeline in service, under construction or at the design phase?

Dear Mr.WAL

The "PIPE LINES ARE IN SERVICE".

The MPE is 20ml for every 100 litre.

with regards,

V.RAJAGOPAL-TAMILNADU-INDIA

MPE? please define acronym.

Dear Mr.WAL,

MPE means "MAXIMUM PERMISSIBLE ERROR"

with regards,

V.RAJAGOPAL-TAMILNADU-INDIA

I wonder if opening/closing some valves would displace more fluid than the maximum permissible error; 20ml/100l (i.e., 0.02%) seems optimistic.

Thanks for defining MPE for me Tornado.

The limit of my fuel pipe line experience is the design and installation of in factory fuel delivery infrastructure. Nobody ever asked me to calculate how much fuel was sitting in the pipes.

If a client asked me to calculate it, I'd treat it the same as any other geometry problem and calculate the volume of what is effectively a contorted (some more than others) cylinder and use the centre line lengths for the different diameters yadda.. yadda.... ∏x(R₁²xL₁+R₂²xL₂+.....) Spread sheet would do it easily.

I too was thinking about how to determine the volume of the valves et al.. I have a feeling that this info is most likely searchable on the internet...

...but say it wasn't. You could perform 2 volume calculations. Firstly, where the valves are eliminated from the calculation completely, and secondly where the valves are considered to have the same volume as an unobstructed pipe segment of the same length.

The real volume will be somewhere in between. The OP can do the arithmetic.

Depending on the total valve body length to pipe length ratio this dither may well be within the quoted MPE, using the average volume of the two extremes the MPE would be half the dither (I think) especially for very long pipelines.....or not.

Rattle the numbers and see what comes out.

When you're not sure, check the boundary conditions and work inwards from there.

> exact product inside pipeline

1) Pipeline flow meter accuracy needs to be calibrated/verified in place, or in pipeline terminology, 'proved'. There are numerous firms that sell provers for petroleum flowmeters.

http://www.fmctechnologies.com/MeasurementSolutions/Technologies/LiquidSystems/ProverSystems.aspx

2) Siemens clamp-on ultrasonic flow meters can differentiate between successive products flowing in a pipeline when programmed for the sonic velocity signatures of the various products at various temperatures (and optionally pressure).

The measured variables relate to the products' density. Siemens calls the technique 'interface detection' and the process variables are API number and densities.

It may be possible to separate the streams with a pipeline pig.

But you need to calibrate that!

πr²(l_P - l_p).

Could we settle this with an ICP (Intelligent Calibration Pig)?

Are we calibrating flow meters now?

What exactly does "exact product inside pipeline" mean?

Volume of product in the pipe line - I would translate it!

I believe you need to look up results from this search:

https://www.google.com/search?q=pigging+and+pipe+line+caliper

You need to talk to the different companies to see if there is a standard.