Dimension table · Gaskets

Flat gaskets to DIN 2690 (withdrawn): dimension table for existing plant

DIN 2690 set out the dimensions of flat gaskets for flanges with a flat sealing face. The inside diameter d1 follows the nominal size DN, and the outside diameter d2 additionally follows the pressure rating. The table covers DN 4 to DN 1400 and is fully verified in the DN 4–500 range against the manufacturer's dimension table KLINGER Information 70.1.1.

Standard: DIN 2690
Status: Withdrawn, replaced by EN 1514-1
Type: Flat sealing face
Scope: PN 1 – PN 40
Nominal sizes: DN 4 – DN 1400

Note on standard status: DIN 2690 is withdrawn and has been replaced by EN 1514-1. The dimensions below serve solely for identification and the maintenance of older plant and existing stock. For new designs, the contractually agreed, currently valid flange and gasket standards prevail – for flanges to EN 1092-1 generally the relevant parts of the EN 1514 series – along with the operating conditions and manufacturer specifications. In trade, orders to DIN 2690 are still placed in some cases – we supply the matching part.

Asbestos-free fibre-material flat gasket in ring form for the raised face — Flat gasket from the Zickwolff range: ring form for the raised face, inside Ø d1 by DN, outside Ø d2 by pressure rating. Image: Zickwolff shop

Good to know when cross-checking existing plant: the dimensions of DIN 2690 have largely been absorbed into the current EN 1514-1 (form IBC – ring inside the bolt circle); for a few nominal sizes the EN values differ by a few millimetres. The current dimensions are set out on our page Flat gaskets to EN 1514-1; for guidance on gasket forms and materials see the gaskets overview.

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The standard names dimensions. What is listed here, we carry – from stock or to order; how quickly a size is available we clarify on request.

Inside Ø d1 and outside Ø d2 to DIN 2690, all dimensions in millimetres – availability: from stock or to order
DN	Inside Ø d1	PN 6	PN 10	PN 16	PN 25	PN 40
4	6	–	–	–	30	–
6	10	28	38	38	38	38
8	14	33	43	43	43	43
10	18	38	45	45	45	45
15	22	43	50	50	50	50
20	28	53	60	60	60	60
25	35	63	70	70	70	70
32	43	75	82	82	82	82
40	49	85	92	92	92	92
50	61	95	107	107	107	107
65	77	115	127	127	127	127
80	90	132	142	142	142	142
100	115	152	162	162	168	168
125	141	182	192	192	195	195
150	169	207	218	218	225	225
(175)	195	237	248	248	255	267
200	220	262	273	273	285	292
250	274	318	328	330	342	353
300	325	373	378	385	402	418
350	368	423	438	445	458	475
400	420	473	490	497	515	547
(450)	470	528	540	557	565	572
500	520	578	595	618	625	628
600	620	680	695	735	730	745
700	720	785	810	805	830	850
800	820	890	915	910	940	970
900	920	990	1015	1010	1040	1080
1000	1020	1090	1120	1125	1150	1190
1200	1220	1305	1340	1340	1360	1395
1400	1420	1520	1545	1540	1575	1615

"–" means: not documented in the source. Values in brackets (e.g. "(175)") mark less commonly used nominal sizes. For PN 1 and PN 2.5, use the PN 6 dimensions, except for DN 1200 (outside Ø 1290 mm) and DN 1400 (outside Ø 1490 mm). DN 60 is a special nominal size provided only for cast-iron flanges. Typical ordering information: "Gasket DIN 2690, DN 65, PN 40, material, s = 1.5 mm" – for new designs correspondingly "Gasket EN 1514-1, form IBC, …".

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We carry flat gaskets matched to flanges and bolting from stock – cut-to-size and special materials on request. The overview shows which material suits which medium and temperature.

Current standard

Dimension table EN 1514-1

The dimensions valid for new designs, form IBC.

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DN, PN, material and thickness – we supply the matching part.

Frequently asked questions

What are the dimensions of a DIN 2690 flat gasket for DN 100 PN 16?

The dimension table on this page gives inside and outside diameter of the flange gasket per DN and PN to DIN 2690; thickness depends on material and installation.

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How this data is compiled. This page does not reproduce a standard. It shows the dimensions you need for an enquiry, an order and installation – for sizes we supply, checked against manufacturers’ and suppliers’ documentation and against our own product data. What you see here is what the market supplies, checked against the standard – or calculated by us. How we select our sources and keep them up to date: About this knowledge.

Technical basis: DIN 2690 (withdrawn; dimensions for identification and maintenance of existing plant). Dimension data DN 4–500 fully verified against the manufacturer's dimension table KLINGER Information 70.1.1 (flat gaskets to EN 1514-1 and DIN 2690); DN 600–1400 from a distributor dimension table with a documented QA correction for DN 800/PN 6. All information without guarantee – for new designs the current standard texts and the manufacturer's technical data sheets always prevail. Selection of values follows our delivery and stock programme; compiled from our own inventory management and long-standing trading practice, cross-checked against publicly available manufacturer data. This table does not replace the standard text – the currently valid standard always prevails.