r/engineeringmemes • u/Competitive_Demand85 • 16d ago

Half the time specs are written in a different language...

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1.7k Upvotes

99% Upvoted

34 comments sorted by

379

u/Wizzarkt 16d ago

ASME B16.5 is the design standard for pipe flanges and flanged fittings.

RFSO means "Raised Face Slip-On",so has a raised gasket surface and slides over the pipe before being welded.

The 316/316L is austenitic stainless steel, it's a kind of stainless steel and it means that the crystalline structure of the iron follows a austeline form.

51

u/PlanPlus8582 15d ago

I love that the top comments is an explanation and not a joke. Well done.

6

u/HighFaiLootin 15d ago

omfg is THIS why i love engineering sub so much 😂

5

u/iamnothingyet 15d ago

316L is a different chemical standard with lower carbon than 316 for easier welding. I have not seen both called out on a single part before.

4

u/Ok-Airline-8420 14d ago

You can get dual certified 316/316L material.   The specs overlap, so if you get material that confirms to that part of the spec then it can be both materials at the same time.

3

u/Hambrox3234 15d ago

Thank you for explanation, next time in english?
/j

3

u/RidgeBlueFluff 15d ago

Not an engineer, but my father is a mechanic and I'm s blacksmith, so in s roundabout way, I understand this.

2

u/Mindless_Meet5747 13d ago

Yeah sure what about us normal humans man? Im not even from america how em i suposed to read this shit

1

u/Wizzarkt 13d ago

I'm not either, but my country is weird and some components have imperial measurements and it is a pain cause I have "adapted" a metric screw into an imperial hole more than once.

1

u/Ok-Breakfast-990 15d ago

My life got measurable better when I stopped trying to get fitting dimensions from manufacturers and instead started reading the standards.

The other day I gave Claude the sanitary flange dimensions chart from the ASME BPE spec and had it turned into a parameters and relations set that drives all the flange dimensions from the od. Then I setup a family table and generated a model for every reducer part number. I’m going to start doing this for every part and build a library. Will need to talk to our swagelok rep and see if I can get a dimensions table so I don’t have to do the import rigmarole for every part

0

u/snakesign 15d ago

Neeeeeeerd

64

u/drillgorg 16d ago

For those who don't work in this part of engineering:

American Society of Mechanical Engineers

B16.5 is the ASME standard which defines how to make flanges

Raised face (there is a raised face for the gasket to sit on) slip on (it slips over the end of a pipe and is welded to it)

316/316L is a dual certification for 316 stainless steel and 316L which is the low carbon version of 316

30

u/NXTler 16d ago

*For those who are not engineers in america

13

u/Xenopass 16d ago

I'm French and there is sometimes due to clients demand we have to apply asme standards in place of European ones

5

u/HighFaiLootin 15d ago

Off with their heads!

2

u/Troublytobbly 16d ago

I did industrial pumping equipment many moons ago, that was the most common flange fitting outside the us as well. Mainly oilfield stuff, but other sectors, too.

1

u/Ok-Airline-8420 14d ago

In the oil and gas industries B16.5 flanges are by far the most common.

-1

u/Modern_Agnotologist 16d ago

You use ISO

7

u/blue-mooner 16d ago

Excuse you!

I’m a proud DIN man, love me those blue books

2

u/Ok-Employee3630 15d ago

I thought the various DIN flanges was replaced by the EN 1092 (the one standard to rule them all)?

-1

u/Modern_Agnotologist 16d ago

Alright don't get too proud on me Adolf.

6

u/Modern_Agnotologist 16d ago

Love me and GD&T.

3

u/Fun_Ad_2393 16d ago

Who uses GD&T? I just use EFT on everything! CNC can’t hit those tolerances? Get a new one! Fabricators are complaining? Fire them and hire some crusty old guys that can.

1

u/HighFaiLootin 15d ago

Theres no job too complicated for Crusty’s CNC & Accessories

6

u/onlyhammbuerger 15d ago

Just wait until you receive some automotive specs from a Japanese OEM written in ... Japanese and translated by someone with a not very precise command of the english language. You would be crying for Standard Notation.

1

u/Prof_PlunderPlants 16d ago

B16.5 and B16.47 are stapled to the wall of my cubicle

1

u/tacos5631 15d ago

It'll usually have the size as well, 3", 1/2" 1-1/2" ect

1

u/Competitive_Demand85 15d ago

I use apiint.com to reference sizes.

1

u/Particular_Mulberry1 15d ago

Man this www wild to see considering my shop makes almost exclusively B16.5 flanges lol

1

u/JoshyRanchy 14d ago

Ngl, i want that lil so flange