Standards · Standards worlds
Flange standards worldwide
A flange from Japan is called 10K, one from the USA Class 150, one from Europe PN 16 – and none of them simply fits the other. For each standards world, this page shows in one row what the standard is called, how pressure rating, size and facing are named there, whether it fits EN 1092-1 and where to continue with us. It is a signpost, not a dimension table: figures only appear on our dimension pages.
- Standards worlds
- 9 rows from Europe to Australia
- Per row
- standard, predecessors, pressure rating, size, facing, fit
- Dimensions
- only on our dimension pages, with source
Flange standards by standards world
| Standards world | Standard | Pressure rating | Size | Facing | vs EN 1092-1 | With us |
|---|---|---|---|---|---|---|
| Europe | EN 1092-1 formerly/alongside: DIN 2501, DIN 2527 to DIN 2642 | PN 2.5 to PN 400 | DN | A to H (figure 4) | fits | Our dimension pages per type 01, 02/04, 05, 11, 13 - dimensions as the market supplies them, checked against the standard. |
| USA | ASME B16.5 (NPS 1/2 to 24) · ASME B16.47 Series A/B (NPS 26 to 60) formerly/alongside: ANSI B16.5, MSS SP-44 (Series A), API 605 (Series B) | Class 150 to 2500 | NPS | RF, FF, RTJ | does not fit | Six type pages to B16.5 and one page for the large flanges to B16.47 - bolt circles differ from EN, never interchangeable. |
| Japan | JIS B 2220 formerly/alongside: JIS B 2220 (earlier editions), JIS B 2238/2239 | 5K to 63K | A (mm) · B (inch) | FF, RF | does not fit | Pressure ratings in K, not PN or Class - looks similar, does not fit EN. Dimensions on request. |
| Russia and EAEU | GOST 33259-2015 formerly/alongside: GOST 12815-80 to GOST 12822-80 (including 12820, 12821) | PN 1 to PN 250 (Ру) | DN (Ду) | types A to M (исполнение) | PN-designated like EN, but a separate flange world - on request only. | |
| China | GB/T 9124.1-2019 (PN) · GB/T 9124.2-2019 (Class) formerly/alongside: GB/T 9112-2010 to GB/T 9124-2010 · alongside HG/T 20592 (PN) and HG/T 20615 (Class) of the chemical industry | PN 2.5 to PN 160 · Class 150 to 2500 | DN (series A and B) · NPS | RF, FF, MFM, TG, RJ | Two series side by side - PN series near EN, Class series near ASME. Always state the series and the pipe series A or B. | |
| United Kingdom | BS EN 1092-1 · BS 10:2009 (Tables A to H) formerly/alongside: BS 4504-3.1:1989 (withdrawn 2002) | PN · Table D, E, F, H | DN · inch | – | fits | BS 4504 is history - today BS EN 1092-1 applies, identical to EN. BS 10 tables live on in old plants and in Australia. |
| Australia and New Zealand | AS 2129-2000 (Tables A to H) · AS 4087:2011 (waterworks) formerly/alongside: AS 2129-1994 | Table D, E, F, H · PN 14, 16, 21, 35 | DN | – | does not fit | Table flanges on the BS 10 pattern - not EN drilling. On request. |
| International | ISO 7005-1:2011 formerly/alongside: ISO 7005-1:1992 | PN and Class | DN | – | fits | Umbrella standard: the buyer picks the PN or Class series - in practice EN 1092-1 or ASME B16.5 is ordered. |
| USA (pipelines) | MSS SP-44 formerly/alongside: MSS SP-44 earlier editions | Class 150 to 900 | NPS 12 to 60 | RF, RTJ | does not fit | Pipeline flanges - the large sizes match ASME B16.47 Series A. On request. |
A signpost, not a dimension table. The designations are checked against register extracts of the standards bodies. “Appears to fit” means: same nominal size, similar pressure level – but bolt circle, bolts or facing may differ. Before installation, the dimension tables of both sides count.
Same name, not the same thing
PN 16, Class 150 and 16K sound like the same pressure rating and are not. PN is a nominal pressure in bar at room temperature, Class a pressure class with its own pressure-temperature table per material group, K the Japanese rating in kgf/cm². Size has three names as well: DN 100, NPS 4 and 100A mean the same pipe, but not the same flange dimensions. Which pairings fit, appear to fit or do not fit is shown on Mixing standards worlds; the standards translator converts individual values.
Facings per standards world
The facing has a different name in every world too: EN 1092-1 knows types A to H, ASME B16.5 RF, FF and RTJ, JIS FF and RF, GOST types A to M. A flat-face type A flange and an FF flange are similar, type B1 and RF as well – but the height of the raised face and the surface finish follow different rules. The assignment of the old DIN types to EN 1092-1 with profile pictures is on our flange page.
How to inquire
Always state standard, pressure rating and size in the wording of the standards world your drawing comes from – “GOST 33259, PN 16, DN 100, type B” or “JIS B 2220, 10K, 100A” rather than a translation. We then check whether a part from stock fits or whether a counterpart to the foreign standard has to be sourced.
Standards worlds by region · EN and ASME compared · Mixing standards worlds · Standards translator · Pipe and fitting standards worldwide
Frequently asked questions
Which flange standards exist worldwide and which fit EN 1092-1?
One line per standards world - standard, pressure rating, size, facing and whether it fits EN (yes, apparently, no); only EN and ISO 7005-1 fit, ASME, JIS, GOST, GB/T and AS are worlds of their own.
Is there a flange standard valid worldwide?
No. ISO 7005-1 tried to combine EN and ASME in one standard but did not prevail in practice: Europe works with EN 1092-1, the USA with ASME B16.5 and B16.47, Japan with JIS B 2220.
Does a GOST flange fit an EN flange?
Often it appears to: nominal size and pressure rating carry the same numbers, and many connection dimensions agree. Bolt circle, number of bolts and facing still have to be compared case by case – which is why the row says “appears to fit”.
Why do you have a standard page for JIS but not for GOST?
We hold JIS B 2220 and have checked its tables. For GOST, GB/T, BS and AS we only show the signpost; whether a standards world gets its own dimension page depends on demand.
A standard from another world?
Give us the standard, pressure rating and size exactly as your documents state them – we will tell you what fits from stock and what needs a counterpart.
Send an inquiryYour inquiry to Zickwolff
Send us what you have – designation, standard, quantity, date. We will clarify the rest with you.
One item or a question
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Not in stock? We procure it – single items too.
Designation, standard and quantity are enough.
Several items
Send bill of materials
200 items? One parts list is enough – we deliver complete.
Attach it as a file.
Helpful if already known: project and country, date needed, certificates, packaging and language of the packing lists. If anything is missing, we will ask.
It is urgent
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When do you need it? Express delivery, to the site if required.
Tell us by when you need the material – we will tell you what is possible.
As of 12 Oct 2026. Designations and predecessors from register extracts of the standards bodies and from our standards register; no standard texts, no standard tables, no dimensions from standards we do not hold. No legal advice.