ANSI - ISO equivalencies

[Heyner]

Hi everybody!

I'm working in a project which involves supplies from USA & Europe (ANSI, ASTM & ISO, DIN standards), so I'd like to have a cross reference, for instance:

If I have ANSI B16.5 for Flanges, which the ISO standard for these components? (I know an ANSI flange doesn't match an ISO one same nominal diameter). I used to design for American Standards, so I'd like to know the ISO standard for each topic. Any help would be appreciated.

Thanks in advance,

Heyner

 

[BigInch]

You really shouldn't do that. There are some things that are the same, some that are more or less the same and some things that are entirely different between various families of specifications. Going from one to the other is not appropriate, causes much confusion, requires interpretation subject to much disagreement, usually between apples and oranges, and generally results in the wrong or dissimilar equipment being supplied in the end. That is a headache that NEVER goes away for the whole life of the project.

You're project should have set specifications and you should order all the items according to the appropriate specification of your project. If a manufacturer is able to provide that spec, buy it, if not, find a manufacturer that is.

So, decide on one or the other and do not attempt to include dual specifications, unless you have a very unusual situation and an overpowering reason to do so.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[GregLamberson]

Heyner

Agree 100%, while there are a few (very few) ASME/ANSI/etc. codes that are the same as their fellow ISO's, the vast majority do have differences. You will only be inserting confuison in where it does not need to be inserted and will find out the hard way what those differences are.

All major manufacturers world wide (except Russia), whether they are US based, European, Asia, etc. can comply with any of the codes and as mentioned, if you find one that can't, there are plenty that can.

I've worked for some non-US companies that use solely US codes for their projects. Others have used ISO. I can't say one is better than the other, but can advise not to mix.

Greg Lamberson
Consultant - Upstream Energy
Website:

http://www.oil-gas-consulting.com

 

[Heyner]

Oops, I was not clear...

The point is I have to live with a mixed (ASA ISO) existing construction and some of new supplies are available only ASA or ISO.

I'm not trying to MIX, I'm trying to survive! Since I've been working always as per American Standars, I'd like to know the ISO standars that exists for each type of component, let say: if for forged steel flanges I use ANSI B16.5, Which's the standard I should use for ISO? I know they are not equivalent, I just need to have a reference...

Hope you'll understand...

Thanks for your help!

 

[BigInch]

You can find all listings of the Euronorms here,

http://www.cenorm.be/cenorm/businessdomains/businessdomains/index.asp?pClose=0

ISO Standards "pipeline flanges" here,

Petroleum and natural gas industries -- Induction bends, fittings and flanges for pipeline transportation systems -- Part 3: Flanges

http://www.iso.org/iso/en/Catalogue...UMBER=33105&ICS1=75&ICS2=200&ICS3=&scopelist=

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[pipingdesigner]

Heyner,

Try this link,

http://pipingdesigners.com/Codes & Standards - lists.htm

You will find a listing of various international standards and also some cross referencing between them.

Hope it helps.

pipingdesigner

http://www.pipingdesigners.com