What Does It Mean?

"The inner surface of the pipe shall be supplied with an epoxy coating".

How thick, though?

And any particular epoxy?

"How thick, though?

And any particular epoxy?"

Sorry, I'm sitting here cracking up almost ready to pee my pants because the OP is asking for the meaning of ID and you want to know how much and what kind of epoxy!!...what difference does it make?

Why do I find this hilarious?

• The thickness and type of the epoxy coating is important because of long-term chemical resistance, as that is why it has been applied to the inside of the pipe. The original poster reveals nothing of the material to be carried inside the pipe or its temperature, which may have an impact on the type of epoxy to be used.
• The thickness of the epoxy coating is important as it reduces the effective diameter of the pipe. The original poster shares nothing of the flowrate of the material to be carried inside the pipe.

The above omissions are common within Mechanical Engineering threads.

<...Why do I find this hilarious?...>

Perhaps things are different in Canada?

Inside diameter or internal diameter is somewhat the same, so what ever you choose thats what it is. Usually for pipe the second diameter short cut is OD, which is the Outside Diameter. So I'd go with the first one!

But in the context you show us what it is it reads for me:

The internal surface has to be coated with epoxy.

Make sure the supplier of your text snippet understands that the ID will change if you put a coating on by exact 2 times the coating thickness.

When I read his post, I don't see him asking advice about epoxy. I only see him asking what ID means. You provided info he didn't ask for so I thought you were joking. Like dry humor? That's why I thought it was funny. Looks like you were serious so my apologies. Cheers.

So we'll call it bonus information. It's not hurting anything and maybe people want to know why the question is being asked because finding the answer to that is so simple, he could have just Googled "ID" and gotten the answer.

I tried googling at work and almost got fired over it. Seems the secretary took offense to it and filled a complaint of sexual harassment. Oh, wait a minute, that was ogling. Never mind.

Bit of both really. The thing is with the coating the ID gets another meaning. I could have answered the same way you did further down, but then we would not have a discussion. This really is a one question one answer thread.

The thing is that as an Engineer you look a little bit further. What concerns me and what I haven't brought up entirely is that OP is asking about "ID" but does not seem to overly concerned with "Epoxy Coating". While when asking the first question I have no trust that OP understands the second term. Its the question that has not been posted that is of concern.

Dead serious!

ID is the hole inside the pipe.

And should be smaller than the OD for the pipe to work properly.

If the ID is larger than the OD, the pipe is invisible and hard to work with.

No, in that case the pipe is simply inside out and the water will be outside the pipe. The pipe is invisible when the two are equal.

I thought your first comment was a bit sparse!

I am glad you took the time to copy this very useful pipe definition standard which I will keep on my desk from now on for reference.

How much is the full standard? Is it in your catalog?

Thanks

IS

I'll send you a copy, under separate cover. Compliments of LynDoor™Industries.

I find that paragraphs 9, 10 and 11 save our workmen much wasted time, since it removes all the ambiguity from identifying the different types of pipe.

Or the pipe has been turned inside out.

Or maybe it's inside out.

It could be INNER DIAMETER or INNER FACE DIAMETER or INNER ORIFICE DIAMETER

Does it mean INSIDE DIAMETR- yes. Entire length top to down (end to end) INSIDE whole length of each pipe (20 ft) epoxy coated.

Wow! OP asks for a simple definition of "ID" and gets all kinds from you guys. Sheesh!

Ahmad, ID is simply an acronym for "Inside (or Internal) Diameter".

Manufacturing of pipe passes through different stages, to ERW pipe,like uncoiling steel sheet, random check of steel plate (using ultrasonic), Electric Resistance Welding (ERW), Ultrasonic check of seam weld, marking of defects on seam, measuring and recording of length on pipe and final painting pipe details ( heat number/batch number, pipe length, wall thickness of pipe and pipe identification number. All detail is painted inside of pipe with white/yellow epoxy paint. Selection of epoxy paint and location of pipe detail is inside for it is not rubbed off due to handling/shipment. Depending upon the Purchase Order, pipe ID is stencilled in four to six digits. Now when ever an Inspector does the pipe inspection to the lot and before shipment, imperfection is recorded and for that record pipe is picked by the number whether it to be loaded for shipment or not. Similarly when pipe arrives at destination, pipe damage inspection is done by inspector deployed by the insurance company or the Owner, pipe reference is needed and there again Pipe Identification is needed. Packing list for shipment also need pipe number, thickness and length to make total weight..

For reference: www.rathgibson.com/technical_info/glossary.aspx (technical info)

Relating to "epoxy coating" Need more info. Anything in the drawing or blueprint notes?? You might check back with the designer/draftsman/engineer on specifications/ requirements of "epoxy coating".

Inner Diameter

Are you kidding?

Normally the ID is measured in several spots ,as the pipe is not entirely round, averaged , then the coating thickness is added to the ID measurement.

Always meant "Inside Diameter" and OD meant "Outside Diameter" in my Engineering Book when referring to pipes and tubing back in my Drafting and Plant Engineering days.

I would say either as they have the same meaning

my thoughts would be the specified Internal diameter of the pipe they want is the measurement they want after the coating has been applied to the inside of the pipe