I’m trying to figure out what all these numbers mean when trying to size a gasket. I’m having a custom o ring made because the gasket I was sent with my sintered disc does not seal properly.
I have the measurements of the gasket in mm from the company but I’m being asked by the gasket company to provide tolerances and I dont know what to tell them.
https://future4200.com/uploads/default/original/2X/9/92b61e246963eb29910d3d8a1035afab92560008.mp4
0 thats iT 0.0000000 
That’s what I wanted to say 
Don t know the answer either @Soxhlet
Where did u get the disc 
China @Apothecary36 company named whenzou bill stainless
Do you have a caliper gauge? If so you can take very accurate measurements of the gasket inner diameter and outer diameter.
In terms of tolerances, if you can get a reading accurate to 0.1mm, make that your tolerance. I’d suggest a fraction of an mm. Might have to have a few iterations of this—i.e. order a gasket, remeasure if fits incorrectly, rinse repeat.
And remember to pick a good material—tuf steel or viton are my picks.
Dont have a caliper gauge but I’ll be buying or borrowing one here pretty quickly.
Thank you @TheGratefulPhil
Fixed this problem a while ago but decided to see if I could make the original o-ring work with the aid of some thread tape and it worked like a charm.
I figured I’d share it with you folks. Cant believe I didnt think about this before 
Anybody @TheGratefulPhil @Dirteagle (tag an engineer) know what the name of this style gasket is?
I know I’m an idiot not posting the actual gasket but the gaskets are a thick, flat 10" circles with no ridges or anything
If im not mistaken, that’s a flange gasket.
Quick google search pulled up this link.
Typically used for larger bore, higher pressure applications that don’t require repeated disassembly.
The ones I have on hand don’t have holes for bolts. I’m pretty lost on which one I need. The manufacturer will get back to me eventually but I figured I’d ask the fam
The gasket doesnt have holes or the flange doesnt have holes?
I dont know that flange by any other name than a 12 bolt flange.
The flange has holes the gasket I have on hand has no holes. The gasket I have is supposedly viton but smells like nasty rubber. I’m trying to find a ptfe or tuff steel version
What kind of pressure is the connection gonna see?
It’s gonna have a prv at 15 psi most likely
Check the standard ANSI, DIN, ISO flange dimensions to see if any of them match your flange. Markings would be helpful
Edit: looks like a standard ANSI 10" flange
Did you buy the flange as part of a kit or som35hint are did you just having it laying aroube?
Looks like a pretty standard flange gasket. Look at petroleum vendors. Probably available inquite a few different materials and thicknesses
What is the application? What is the process fluid or gas?
Flange gaskets are among the most straightforward type of gaskets. In many low pressure situations (provided chemical compatibility, heat range has been checked) these gaskets can be fabricated on site from standard gasket material - rubber/fiber, paper, etc. Gasket sheet traced / marked to fit. Use a ball peen hammer for the bolt holes and to tap along edges then trim out with x-acto or other tools
If you need PTFE or something else you’ll have to identify the flange to get the correct gasket.
looks to me like a normal ASME flange
See if any of those match up
