[j]

If you already know the answer then I’m not sure why you are asking the question. So, with the caveat that it depends on what type of fitting you are talking about and I assume you are talking normal Shedule pipework here then it is down to the schedule of the pipe not being of uniform thickness on for example, a tee or WN flange. So, if you cut off the prepared beveled end of a tee to put in your tie-in then it is impossible to prepare an new bevel to match the ID of the inserted pipe or fitting exactly, thus having a ‘lip’ inside the pipe.

Of course if you’re talking Biobore tube for example then this wouldn’t apply.

Well, Did I get it right? Do I get a gold star if I do?

[j]

I could but I thought I’d ask here first. I know I’ve drawn them at least twice in the past for different companies but never thought to take the CAD file with me when I left.

[j]

Geez. Going back a bit in time to my water treatment days here but I’ll give it a go. It’s been over 17 years since I’ve worked with cement lined pipe.

CM lining is generally used for potable water. the pipe itself is ductile iron. The size ranges from 300mm to 1600m dia. depending on the manufacturer. Biwater and Stanton were the main 2 manufacturers at the time.

Just had a route around my desk for my Biwater book which is (or was) the bible for all ductile iron pipe. It must be at home somewhere. I do have some disks with CL DI pipe and fittings on them though if you’re stuck.

Cement lined pipes are never flanged from memory so when connecting valves etc you would use a Viking Johnson flange adaptor.

When designing make sure you protect against surge as this could cause the joints to pull apart.

I’ll have to get back to you after I get home and find my biwater book.

in the meantime I hope this helps,
J

[j]

What about a cross support? Effective if you’re being crucified on a job. We used to find that goalpost supports were handy until we discovered that the client kept moving them!!

[j]

What about a cross support? Effective if you’re being crucified on a job. We used to find that goalpost supports were handy until we discovered that the client kept moving them!!

[j]

Sorry, but that hasn’t answered my question. Which material will melt first? I need to be able to tell one from the other.

[j]

It’s ok to do this and was my first thought also that they would react differently to heat.
Only trouble is I still don’t know how to tell the difference. How will each material react when heat is applied?
Thanks,
J

[j]

Is there a collective Noun for pipers???

There is one.
It’s a flange of pipers!

Really 6D this is basic stuff. It’s like knowing your times tables.
You know like a sh*tload of pipework is twice as much as a f**k load of pipework

J

[j]

Are you sure it’s a ball valve you’re looking for? I’m not an O&G Piper but I would imagine such a beast would be difficult to operate. Anyway, your first port of call should be to the process engineer who specified the valve and ask him/her for a data sheet.

[j]

Pipers are from mars, Engineers are from Venus?

[j]

you have a pm

[j]

Autocad would be fine. Yes, Produce a piping General arrangement with plans and sections. It only needs to be simple and based on equipment from you own imagination. If you have drawings of pumps or vessels so much the better. there are probably drawings of actual pumps that you can download fron the internet.

[j]

hi please give me informationn

shoot me ……….NOW!

[j]

It would really help if you had a portfolio to show at the interview. This could just be a mock up of a tank, vessel, and a pair of pumps. Pipe it throwing in some instrumentation, valves etc. Dimension it up, Plot it off. Also do iso’s of the lines you’ve shown just to demonstrate what you know. Nobody interviewing you will expect it to be perfect but what it will do is show how keen you are. If you want someone from here to do a quick review of it prior to your interview you can PM me and I’ll throw my eye over it for you.
Good luck.
J

[j]

Not much impact ‘cos it’s not true. They are engaged at the moment in a ‘value engineering’ exercise (for value engineering read costcutting) in which the scope has been reduced by approx 1/3. There should still be plenty to go around.
J

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