[eliutbb]

Hello, Well let me ask you this, what is the difference between a Slip-on flange and a Lap-joint (without the stub end of course). If you can go out to your warehouse and check them out.

For one there is no RF…

Well I guess there is absolutley no meaning of existence for a LAp-joint flange without its stub end, tell your boss to weld them and make a statue or something… sorry for the irony

REgards

[eliutbb]

Hello guys,

I concur with Jop:
“With this in mind I do not recommend a (default) field weld at every platform penatration. It would be unneccessary and would add extra cost to the project”

I usually just tell the civil people that I want a hole on the grating, the size and where I want it, sometimes you might need a support (at the grating elevation, supported on the srtucture) there and have to tell them that its not a standard hole.

I allways thought that FFW’s were necessary where you need or are not sure of the final longitud, for example if you are going up (or down from) to the rack.

And I think there is one more, you put FW’s on small sized branches, drains etc because handling from shop to the field might damage them.

Cheers!
Eliut

[eliutbb]

Jop, I kind of think that you could have sued Vendor-X.
Now regarding the reduction thread, some vendors are now saying that you should consider having a pup of at least 5 to 10 times the diameter of the line between the nozzle and the elbow or first obstruction in the suction line. Has anybody had to deal with the same issue? I think that it is related to what type of pump you are dealing with, but some companies are developing a “trend” to establish that criteria for all pump suctions. Which is wrong because:
“In piping there is a reason for everything”

I’m not mocking your friend, he was right, but not just for piping, that applies to life in general, he must have been a cool guy.

Cheers!
Eliut

[eliutbb]

Point taken!

Good luck Mahmoud

Cheers!
Eliut

[eliutbb]

NOw I think that I might have had some itch in my rear when I wrote that post. And I understand what you are saying, you disagree because you are a “field person” you have to do stuff on the spot and dont have the time or luxury to ask the experts. Furthermore to this day I still refuse to be near one of those “hot tapping” stunts you guys do, call me timid if you want.

And I agree, the scope of a piping designer is not just different its broader and by far more interesting than others.

Cheers!
Eliut

[eliutbb]

Im sorry but this is not right, I know that Im going to sound rude, but if you want to avoid being in a world of pain and misery, I strongly sugest that you follow this advice:

“First of all, If you are not a structural engineer, you should not do this your self. Get a structrual engineer involved.”

It really pisses me off (this is where I get rude) when people take everything on their hands even when they are not completly sure of what they are doing. How do you know if the underground is solid? A lot of people just think that in order to make a foundation you just have pour and pour indiscrimante amounts of concrete, and that the more is the best, that is wrong in most cases, when the “friatic mantle” (is that the right translation?) is too high your trenches and foundations might float or sink.

Again Im sorry, and please dont take this personaly, but that is not professional behaviour.

I truly hope you sove your problem I’v been there.

Cheers!
Eliut

[eliutbb]

A Pup? Thats is very interesting here in MExico we call them: “carretes”. I read all threads and nobody answered why its called PUP and not PoP (piece of pipe, i think I know why ) . Now a spool is a shop welded system not a short piece of pipe, but Pup? Isnt that a small dog with big cute eyes and a wagling tail?

What Im doing is what B31.3 says:

M = the larger of 2.5(r2T )0.5 or tan  (R1 − r2)

where:
r2 = mean radius of pipe using nominal wall T
T = miter pipe wall thickness (measured or minimum
per purchase specification)

Real problem is to convince old pipers (not that Im a “pup” but not that old either) and rule #3

NExt meeting with PEmex Im carring a gun (best convincing argument ever invented), BTW that might be a cool thread: “Worst ever client to deal with” Pemex is top of my list, they are government regulated and those burocrats have a lot of time on their hands to make my life a living hell.

Thanks for your input guys

Cheers!
Eliut

[eliutbb]

Hello Jop,

Very interesting subject, as you said many clients have different rules, for example here in Mexico Pemex were allways content with a 2″ span between the edge of the flange and the edge of the OD of the smaller pipe (plus insulation). But recently they want 3″ the result is that we have to make bigger racks now, my theory about why they decided to change that rule is poor flexibilty design in past projects (oh, yes I’v seen it, and that is curiously related to other post you made in the Canada forum: https://pipingdesigners.com/wp//phpBB/viewtopic.php?t=17 )

BTW I have allways liked this forum and found usefull information, I just recently decided to post something here and stop just lurking. I really like what I do and hope I can help others to enjoy it too, with what little I have learned over the years.

Cheers!
Eliut

[eliutbb]

1. Do nothing.

LOL

While you where very comprehensive and most definetively right in most aspects Im quite sure that you were joking with that.

And some people says that pipers dont have a sense of humor.

Cheers!
Eliut

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