PIPELINE PIGGING 1

[QuickFlange]

Hello,
Can anyone clarify?
In line pipes (piggable lines)is it necessary to match pipe ID and the connected valve (or)any other fittings like tee, etc.,exactly with pipe ID? How much difference is allowed?
Thankyou.

 

[BigInch]

No. How much missmatch depends on what type of pig you're running. There are hard ones and soft ones and very soft ones, bullets and spheres and instrumented pigs. Some 8" spheres will go through a 4". Most all will take some missmatch. Instrumented pigs least of all, but still a little, check with your contractor for those. What kind are you thinking about?

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"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[zdas04]

I saw a presentation once from Tenneco where they said their 36" line from DC to NYC had a bunch of 30-inch block valves. Their cleaning pigs would take 30-90 minutes to traverse each valve depending on demand in NYC. The pig run took several days and the pigs they used tended to be wrecked at the end of one run, but they always ran.

David

 

[BigInch]

Sometimes you get pork chops.

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[BigInch]

As you can see here, its a wide ranging menu.

http://www.ppsa-online.com/about-pigs.php

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/