/diy/ - Do It Yourself

>what is nominal pipe size

>>1722696
Who fucking cares? Diameter matters, not arbitrary numbers.
If I didn't measure, I could have bought wrong pretty expensive drill bit, just because bunch of assholes decided to call 15 mm some arbitrary number.

>>1722681
Good thing you weren’t measuring 2” in, for the center of a 2x4

>>1722696
a miserable little pile of secrets

>>1722704
>Who fucking cares?
Evidently not you, which led to your mistake.

>>1722710
This also pisses me off.
They still call it 2x4, even though one with hairs is real 2x4, but one that is nice and smooth is fucking 4x10 cm

>>1722696
Isn't nominal pipe size supposed to be somewhere between ID and OD? 15mm and 14mm are both way above that.

>>1722722
>nominal pipe size supposed to be somewhere between ID and OD
pretty sure its always a little bit more than actual ID in case your viscosity and/or corrosion buildup is high, it still flows pretty good like its supposed to.

op is an autistic faggot

>>1722681
>1/2 inch is 12 mm
1/2 inch is 13mm, which you would know if you ever picked up a wrench in your life

>>1722777
My wrench has 1 mm of play

>>1722713

lol

>>1722681
>WHHAAAA I GET BETTER WATERFLOW THAN I WANTED FOR NO EXTRA COST

>>1722780
You need a new wrench

>>1722681
plumbing pipe is measured in ID because they care how much it can actually flow, not how much space it occupies.

Retard detected. Stick to mopping pablo bonito rodrigo

>>1722681
>if they say 25mm, it is 25 OD
PVC pipes follow NPS dimension standards, meaning that up to 12", the inside diameter of schedule 40 pipe is pretty close to the nominal size, with different schedules having different inside diameters. 14" and above, the nominal size is the outside diameter.

>>1722722
>Isn't nominal pipe size supposed to be somewhere between ID and OD?
No. It's based on historical use practices based on needs for pressure rating and flow. The nominal pipe dimension in modern sizing practices is close to the traditional internal diameter of "standard weight" iron pipes of that nominal size. Other pipe weights of the same nominal size vary the internal diameter so that they can use the same fittings as other schedules. "Standard weight" corresponds to the modern schedule 40. Higher schedules have a smaller-than-nominal internal diameter, while lower schedules have a larger-than-nominal internal diameter. Copper pipe uses a different system due to its historically different uses. See pic.

>>1722777
1/2" is precisely 12.7mm

>this mixup plays into my obsession for metric so im going to get extra mad about it!

>>1722825
New wrench will have play too, because I use one as hammer.

>>1722863
>PVC pipes follow NPS dimension standards,
PP doesn't.
>>1722828
Dude that installs it doesn't care about ID at all. Enginigger cares about ID

>>1722863
All of what you just said pissed me off. I guess I can thank God I'm not a plumber today though.

>>1722713
got me

If you're that worried about the pipe size matching the OD just use ACR copper

>>1722777
>1/2 inch is 13mm, which you would know if you ever picked up a wrench in your life


1mm = .03937"
1/2" = .5000"
.5000/.03937 = 12.7000 mm
1/2" does not equal 13mm

>>1722681
>Think, OD is 1/2
Tubing is measured on the outside, not pipe

>>1722681
>he doesn't know tubes and pipes are sized for movement of fluid rates rather than literal size
Lmao go get your husband sweetie, this is a job for a man

>>1723045

1/2" is closer to 13mm than it is to 12mm which the OP stated it was...

Most of the time 1/2" and 13mm wrenches are interchangeable.

>>1722713
This
t. electrician

>>1723045
wait till you hear about 15/16" and 24mil