Pig receiver-requirement of Fence around it

Dear all fellow pipers,

Could you pls let me know why the fence is required to be kept all around the pig trap facility? I read this in of the company standards that says Pig trap shall be fenced.

I asked our Operation focal point & he says in European region it is a practice to control access as this is critical area.

Can you pls provide any logical reasoning behind this requirement or the fence is not required at all?

Here I am talking about the pig receiver inside the plant facility & not the remote areas like in case of cross country pipelines.

Greatful if you can share your thoughts at the earliest.

Thnx

Thanks for the quickest one Jop I am sure the reason is one of the above list. I will post the conclusion shortly.
Till then keep your thoughts/past experiences coming inn.

Thnx

I had a pipeline project recently where we had a number of branches coming into the main line, so we had to be able to "pig" thru each leg to the main-line. All the starting ends happened in existing facilities, these areas were not fenced individually, but contained in the facility fencing. The tie-in points at the main-line were in remote locations, and as JOP has indicated we fenced these areas! Security was the main driving force on this, although they are on oil-field properties, the public road was under a mile from these locations, so "anybody" could come to the site. Actually the fence won't stop a semi-determined individual, but they would stop "site-seers", which seems to be the main problem. OF interests, the client engineer first indicated they wanted these sites "lighted"! I had asked WHY? He indicated "what if" they wanted to pig at night!?? ...And I came back .."WHY would you want too!??"

This was a waste water pipeline, the pigging operation was for cleaning & smart pigging (once a year) only, and why would you want to do that at night? The other issue would be if this area was all lighted up at night, it could attract attention. "IF" lighting was required a mobile unit could easily towed in place and used as necessary, the client decided to omit this requirement.