Dimension table · Flanges · Type 05
Blind flange type 05: dimensions to EN 1092-1
Every dimension of the blind flange (type 05) in one table per pressure rating: the connection dimensions outside diameter D, bolt circle K, bolt holes n × L and raised face d₁, together with plate thickness C₄, plus indicative weights – from PN 6 to PN 40, for all nominal sizes from DN 10 to DN 800. All dimensions in millimetres, dimension letters to EN 1092-1.
Dimension finder: dimensioned drawing for one specific size
Choose the pressure rating and nominal size – the drawing and dimension table then show exactly this version, with the values written directly in the drawing instead of just the dimension letters. The tables for the nominal sizes covered here are further down the page.
EN 1092-1 covers the greyed-out sizes. Our dimension overview lists them as order dimensions – see the table “Further deliverable dimensions” below.
Blind flange · Type 05 · DN 100 · PN 16
Technical basis: DIN EN 1092-1:2018-12. Zickwolff has prepared this presentation for practical use, with our own structure, our own designations and a statement of what kind of value each figure is. The original standard governs normative requirements.
| Property | Value | Type of information |
|---|---|---|
| basic data | ||
| nominal size | DN 100 | standard dimension |
| pressure rating | PN 16 | standard dimension |
| weight (guide value, steel) | 5.7 kg | guide value |
| availability | from stock or procured | trade information |
| connecting dimensions The dimensions that decide the fit with the mating flange. | ||
| outside diameter D | 220 mm | standard dimension |
| bolt circle diameter K | 180 mm | standard dimension |
| bolt holes n × L | 8 × ⌀18 mm | standard dimension |
| bolt size | M16 | standard dimension |
| flange thickness C4 | 20 mm | standard dimension |
| sealing face | ||
| centre section Gmax | 90 mm – maximum diameter up to which the centre section of the sealing face may remain unmachined (5.6.1 note 1). Gmax is itself a maximum value; there is no limit deviation for it | standard value |
| raised-face diameter d1 | 158 mm – applies to the version with raised face (form B1); the standard version of the blind flange is the flat form A | standard dimension |
| raised-face height f1 | 3 mm – only with form B1; the plate thickness C4 includes it | standard dimension |
Without an entry in the “Type of information” column: standard dimension. A dimension that EN 1092-1 specifies for this size.
Where exactly it is measured
- outside diameter D
- largest diameter of the flange plate, measured across the edge
- bolt circle diameter K
- diameter of the circle through the centres of the bolt holes – with an even number of holes, from hole centre to opposite hole centre
- flange thickness C4
- measure from the sealing face to the back of the disc. In the standard version form A the sealing face is flat – if the part has a projecting raised face (form B1), its height is already included in C4 and is not added
- centre section Gmax
- diameter of the central area of the sealing face that may remain unmachined – recognisable by the transition from unmachined to bright-turned surface
Tolerances (limit deviations): what range the standard permits
For each dimension the range that EN 1092-1 permits is given – minimum and maximum instead of the deviation that would first have to be worked out. In the drawing this is shortened to tolerance – the word everyone uses in practice. In technical terms the two values given are the limit dimensions of the dimension, their distance is the tolerance and the deviations from the nominal size are the limit deviations. The basis is Table 22 and Table 23 – where the standard specifies nothing, that is stated.
These dimensions have two limit deviations – which one applies depends on the specific part
For the following dimensions the standard specifies two limit deviations. Which one applies does not depend on the nominal size but on the specific part. Both cases are therefore written out.
This answer determines: flange thickness C4.
flange thickness C4 – measure from the sealing face to the back of the disc. In the standard version form A the sealing face is flat – if the part has a projecting raised face (form B1), its height is already included in C4 and is not added
Is the flange machined on both faces? (this refers to the two annular faces of the flange plate: the sealing face at the front and the nut bearing face at the back, on which the nuts sit. Machined on both faces means both are faced flat – with fine turning marks and an even sheen. A look at the back is enough: turned bright, or left as-forged with forging or rolling skin)
- machined on both faces flange thickness limit dimensions 18.5 to 21.5 mm (±1.5 mm)
- machined on the front face only, or not machined flange thickness limit dimensions 18.5 to 24 mm (+4 / −1.5 mm)
- I don't know both cases remain
Further properties with limit deviations
These properties have no nominal dimension in the dimension table, but the standard limits them. For incoming inspection they are often the decisive ones – they are what makes a bolted joint fail on site.
| distance between adjacent bolt holes | limit deviation ±1 mm |
|---|---|
| eccentricity of the machined sealing face | at most 2 mm |
| parallelism of nut bearing surface and sealing face | machined: at most 1° · not machined: at most 2° |
Measuring on the part: the dimensions in the picture
Every dimension has its reason – whoever knows why they measure, measures better.
Sources of the limit deviations (11 entries)
- flange thickness (machined on both faces) – Table 22, flange thickness C1, C2, C3, C4, all types (machined on both faces), over 18 to 50 mm thickness
- flange thickness (machined on the front face only, or not machined) – Table 22, flange thickness C1, C2, C3, C4, all types (machined on the front face only), type 02 and 04 (unmachined), over 18 to 50 mm thickness
- distance between adjacent bolt holes – Table 22, centre to centre of adjacent bolt holes, all types, bolt size M10 to M24
- eccentricity of the machined sealing face – Table 22, eccentricity of machined sealing face diameter, all types, over DN 65 (footnote d)
- parallelism of nut bearing surface and sealing face (machined) – Table 22, parallelism between nut bearing face and flange sealing face, all types (machined bearing face), all DN
- parallelism of nut bearing surface and sealing face (not machined) – Table 22, parallelism between nut bearing face and flange sealing face, all types (unmachined bearing face), all DN
- outside diameter – Table 22, outside diameter D, all other types, up to DN 150
- bolt circle diameter – Table 22, bolt circle diameter K, all types, bolt size M10 to M24
- bolt holes – Table 22, hole diameter L, all types, bolt size M10 to M24
- raised-face diameter – Table 22, sealing face diameter d1, all types, up to DN 250
- raised-face height – Table 22, sealing face height f1, all types (sealing face type B, D, F and G), over DN 32 to DN 250, nominal value 3 mm
This information does not replace the standard itself. Only the limit deviations for the size selected here are reproduced. In full – for all nominal sizes, pressure ratings and flange types – they are given in DIN EN 1092-1:2018-12, Table 22 and Table 23. Where to obtain it: DIN Media.
Why limit deviations exist at all and how to read them is explained on a page of its own: Tolerances and limit deviations.
Not in the dimension finder: DN 700 PN 25 – the standard does not specify the plate thickness C4 (to be specified by the purchaser)
Dimensions are nominal dimensions to EN 1092-1 and do not replace the data sheet of the actual item. No statement about pressure or temperature suitability and no statement about the material. DN is a reference number, not a dimension in millimetres – the inside diameter differs from it. Direct link to this size
How to measure correctly
Four measurements identify a flange: outside diameter D, bolt circle K, the number and diameter of the bolt holes n × L, and the flange thickness C. Measure the bolt circle from the centre of one hole to the centre of the opposite hole – or, more easily, from the outer edge of one hole to the inner edge of the opposite one, which gives the same value. Measure the flange thickness from the sealing face to the back of the plate: a raised face is already included in C.
- outside diameter D
- largest diameter of the flange plate, measured across the edge
- bolt circle diameter K
- diameter of the circle through the centres of the bolt holes – with an even number of holes, from hole centre to opposite hole centre
- bolt holes n × L
- count the holes, then measure the diameter of one hole – the hole is always larger than the bolt (example: hole 18 mm, bolt M16)
- raised-face diameter d1
- diameter of the raised face, measured across its outer edge
- distance between adjacent bolt holes
- with equal holes, measure from the outer edge of one hole to the inner edge of the opposite hole (in the measuring direction that is the same side) – half a hole here cancels half a hole there: exactly the centre distance. Applies to the bolt circle K as to the hole spacing, as long as both holes are the same size
- flange thickness C4
- measure from the sealing face to the back of the disc. In the standard version form A the sealing face is flat – if the part has a projecting raised face (form B1), its height is already included in C4 and is not added
- raised-face height f1
- height by which the raised face projects above the flange plate
A measured value rarely matches the table exactly: EN 1092-1 allows ±1.0 mm on the bolt circle (bolts up to M24), ±2.0 mm on the outside diameter up to DN 150 and +1.0/−1.3 mm on a flange thickness up to 18 mm. The dimension finder on this page shows the limit deviations for each size.
Connection dimensions are the same across types: outside diameter D, bolt circle (also called bolt circle diameter/BCD or pitch circle diameter/PCD) K, bolt holes n × L and raised face d₁ apply per DN and PN to all flange types to EN 1092-1 – they are included in the tables here. For the type-independent overview of all pressure ratings, see our flange dimensions PN 6 to PN 40; for the blind flange, plate thickness C₄ is type-specific.
The blind flange (type 05) closes off pipe ends, branches and spare connections – for future extensions, inspection openings or pressure tests. As a solid disc without a bore it carries the full pressure area and therefore has the largest plate thickness of the type series from medium nominal sizes upward. ASME counterpart: blind flange. For an overview of all styles and their equivalents, see our page flange types international; the welding neck flange is covered on the page welding neck flange type 11.
The column headers use the dimension letters from the drawing above: n × ØL = number × diameter of bolt holes, M = bolt size, d₁ = raised face, K = bolt circle, D = outside diameter, C₄ = plate thickness.
PN 6 – dimension table (DN 15–500)
Show full table · more than 10 rows
| DN | n × ØL (mm) | M 1 | Ød₁ (mm) | ØK (mm) | ØD (mm) | C₄ (mm) 2 | Weight (kg) 3 |
|---|---|---|---|---|---|---|---|
| 15 | 4 × 11 | M10 | 40 | 55 | 80 | 12 | 0.438 |
| 20 | 4 × 11 | M10 | 50 | 65 | 90 | 14 | 0.657 |
| 25 | 4 × 11 | M10 | 60 | 75 | 100 | 14 | 0.821 |
| 32 | 4 × 14 | M12 | 70 | 90 | 120 | 14 | 1.18 |
| 40 | 4 × 14 | M12 | 80 | 100 | 130 | 14 | 1.39 |
| 50 | 4 × 14 | M12 | 90 | 110 | 140 | 14 | 1.62 |
| 65 | 4 × 14 | M12 | 110 | 130 | 160 | 14 | 2.14 |
| 80 | 4 × 18 | M16 | 128 | 150 | 190 | 16 | 3.43 |
| 100 | 4 × 18 | M16 | 148 | 170 | 210 | 16 | 4.22 |
| 125 | 8 × 18 | M16 | 178 | 200 | 240 | 18 | 6.10 |
| 150 | 8 × 18 | M16 | 202 | 225 | 265 | 18 | 7.51 |
| 200 | 8 × 18 | M16 | 258 | 280 | 320 | 20 | 12.3 |
| 250 | 12 × 18 | M16 | 312 | 335 | 375 | 22 | 18.5 |
| 300 | 12 × 22 | M20 | 365 | 395 | 440 | 22 | 25.5 |
| 350 | 12 × 22 | M20 | 415 | 445 | 490 | 22 | 31.8 |
| 400 | 16 × 22 | M20 | 465 | 495 | 540 | 22 | 38.5 |
| 500 | 20 × 22 | M20 | 570 | 600 | 645 | 24 | 60.1 |
PN 10 – dimension table (DN 20–800)
Show full table · more than 10 rows
| DN | n × ØL (mm) | M 1 | Ød₁ (mm) | ØK (mm) | ØD (mm) | C₄ (mm) 2 | Weight (kg) 3 |
|---|---|---|---|---|---|---|---|
| 20 | 4 × 14 | M12 | 58 | 75 | 105 | 18 | 1.14 |
| 25 | 4 × 14 | M12 | 68 | 85 | 115 | 18 | 1.38 |
| 32 | 4 × 18 | M16 | 78 | 100 | 140 | 18 | 2.03 |
| 200 | 8 × 22 | M20 | 268 | 295 | 340 | 24 | 16.5 |
| 250 | 12 × 22 | M20 | 320 | 350 | 395 | 26 | 24.1 |
| 300 | 12 × 22 | M20 | 370 | 400 | 445 | 26 | 30.8 |
| 350 | 16 × 22 | M20 | 430 | 460 | 505 | 26 | 39.6 |
| 400 | 16 × 26 | M24 | 482 | 515 | 565 | 26 | 49.4 |
| 450 | 20 × 26 | M24 | 532 | 565 | 615 | 28 | 63.0 |
| 500 | 20 × 26 | M24 | 585 | 620 | 670 | 28 | 75.2 |
| 600 | 20 × 30 | M27 | 685 | 725 | 780 | 34 | 124 |
| 700 | 24 × 30 | M27 | 800 | 840 | 895 | 38 | 183 |
| 800 | 24 × 33 | M30 | 905 | 950 | 1015 | 48 | 297 |
PN 16 – dimension table (DN 15–800)
Show full table · more than 10 rows
| DN | n × ØL (mm) | M 1 | Ød₁ (mm) | ØK (mm) | ØD (mm) | C₄ (mm) 2 | Weight (kg) 3 |
|---|---|---|---|---|---|---|---|
| 15 | 4 × 14 | M12 | 45 | 65 | 95 | 16 | 0.813 |
| 20 | 4 × 14 | M12 | 58 | 75 | 105 | 18 | 1.14 |
| 25 | 4 × 14 | M12 | 68 | 85 | 115 | 18 | 1.38 |
| 32 | 4 × 18 | M16 | 78 | 100 | 140 | 18 | 2.03 |
| 40 | 4 × 18 | M16 | 88 | 110 | 150 | 18 | 2.35 |
| 50 | 4 × 18 | M16 | 102 | 125 | 165 | 18 | 2.88 |
| 65 4 | 8 × 18 | M16 | 122 | 145 | 185 | 18 | 3.51 |
| 80 | 8 × 18 | M16 | 138 | 160 | 200 | 20 | 4.61 |
| 100 | 8 × 18 | M16 | 158 | 180 | 220 | 20 | 5.65 |
| 125 | 8 × 18 | M16 | 188 | 210 | 250 | 22 | 8.13 |
| 150 | 8 × 22 | M20 | 212 | 240 | 285 | 22 | 10.5 |
| 200 | 12 × 22 | M20 | 268 | 295 | 340 | 24 | 16.2 |
| 250 | 12 × 26 | M24 | 320 | 355 | 405 | 26 | 25.0 |
| 300 | 12 × 26 | M24 | 378 | 410 | 460 | 28 | 35.1 |
| 350 | 16 × 26 | M24 | 438 | 470 | 520 | 30 | 48.0 |
| 400 | 16 × 30 | M27 | 490 | 525 | 580 | 32 | 63.5 |
| 500 | 20 × 33 | M30 | 610 | 650 | 715 | 44 | 133 |
| 600 | 20 × 36 | M33 | 725 | 770 | 840 | 54 | 226 |
| 700 | 24 × 36 | M33 | 795 | 840 | 910 | 58 | 285 |
| 800 | 24 × 39 | M36 | 900 | 950 | 1025 | 62 | 388 |
PN 25 – dimension table (DN 200–700)
| DN | n × ØL (mm) | M 1 | Ød₁ (mm) | ØK (mm) | ØD (mm) | C₄ (mm) 2 | Weight (kg) 3 |
|---|---|---|---|---|---|---|---|
| 200 | 12 × 26 | M24 | 278 | 310 | 360 | 30 | 22.5 |
| 250 | 12 × 30 | M27 | 335 | 370 | 425 | 32 | 33.5 |
| 300 | 16 × 30 | M27 | 395 | 430 | 485 | 34 | 46.3 |
| 350 | 16 × 33 | M30 | 450 | 490 | 555 | 38 | 68.1 |
| 400 | 16 × 36 | M33 | 505 | 550 | 620 | 40 | 89.7 |
| 500 | 20 × 36 | M33 | 615 | 660 | 730 | 51 | 159 |
| 600 | 20 × 39 | M36 | 720 | 770 | 845 | 66 | 278 |
| 700 5 | 24 × 42 | M39 | 820 | 875 | 960 | – | – |
PN 40 – dimension table (DN 15–500)
Show full table · more than 10 rows
| DN | n × ØL (mm) | M 1 | Ød₁ (mm) | ØK (mm) | ØD (mm) | C₄ (mm) 2 | Weight (kg) 3 |
|---|---|---|---|---|---|---|---|
| 15 | 4 × 14 | M12 | 45 | 65 | 95 | 16 | 0.813 |
| 20 | 4 × 14 | M12 | 58 | 75 | 105 | 18 | 1.14 |
| 25 | 4 × 14 | M12 | 68 | 85 | 115 | 18 | 1.38 |
| 32 | 4 × 18 | M16 | 78 | 100 | 140 | 18 | 2.03 |
| 40 | 4 × 18 | M16 | 88 | 110 | 150 | 18 | 2.35 |
| 50 | 4 × 18 | M16 | 102 | 125 | 165 | 20 | 3.20 |
| 65 | 8 × 18 | M16 | 122 | 145 | 185 | 22 | 4.29 |
| 80 | 8 × 18 | M16 | 138 | 160 | 200 | 24 | 5.54 |
| 100 | 8 × 22 | M20 | 162 | 190 | 235 | 24 | 7.60 |
| 125 | 8 × 26 | M24 | 188 | 220 | 270 | 26 | 10.8 |
| 150 | 8 × 26 | M24 | 218 | 250 | 300 | 28 | 14.6 |
| 200 | 12 × 30 | M27 | 285 | 320 | 375 | 36 | 28.8 |
| 250 | 12 × 33 | M30 | 345 | 385 | 450 | 38 | 44.4 |
| 300 | 16 × 33 | M30 | 410 | 450 | 515 | 42 | 64.2 |
| 350 | 16 × 36 | M33 | 465 | 510 | 580 | 46 | 89.5 |
| 400 | 16 × 39 | M36 | 535 | 585 | 660 | 50 | 127 |
| 500 | 20 × 42 | M39 | 615 | 670 | 755 | 57 | 188 |
Further deliverable dimensions (32)
Show full table · more than 30 rows
| DN | PN |
|---|---|
| 10 | 6 |
| 450 | 6 |
| 600 | 6 |
| 700 | 6 |
| 800 | 6 |
| 10 | 10 |
| 15 | 10 |
| 40 | 10 |
| 50 | 10 |
| 65 | 10 |
| 80 | 10 |
| 100 | 10 |
| 125 | 10 |
| 150 | 10 |
| 10 | 16 |
| 450 | 16 |
| 10 | 25 |
| 15 | 25 |
| 20 | 25 |
| 25 | 25 |
| 32 | 25 |
| 40 | 25 |
| 50 | 25 |
| 65 | 25 |
| 80 | 25 |
| 100 | 25 |
| 125 | 25 |
| 150 | 25 |
| 450 | 25 |
| 10 | 40 |
| 450 | 40 |
| 600 | 40 |
Order dimensions and values calculated by us; deliverable from stock or procured, availability on request. Limit deviations and figures from the standard: see the main table and the standard itself.
How to order unambiguously: the designation to EN 1092-1
The standard specifies a consistent designation system: Flange EN 1092-1, then type and sealing face form, nominal size, pressure rating and material. A blind flange type 05 with sealing face form B1, DN 200, PN 40 in P250GH is therefore designated:
Flange EN 1092-1/05 B1/DN 200/PN 40/P250GH
Since the blind flange has neither a bore nor a weld end, additional details such as hub wall thickness are not required – DN, PN, sealing face form and material are sufficient for an unambiguous order.
1 M = metric bolt size to EN 1092-1; the bolt-hole diameter ØL is always larger than the bolt thread.
2 Plate thickness C₄ including raised-face height f₁ (sealing face form B1).
3 Weights are indicative values for steel flanges; minor deviations are possible depending on manufacturer and design.
4 DN 65 has 8 bolt holes at PN 10 and PN 16 to EN 1092-1. Older flanges to DIN 2501 have 4 holes here and are still common in existing plant – check the bolt-hole pattern for replacement and extension orders.
5 For DN 700 and DN 800, EN 1092-1 specifies only the connection dimensions at PN 25; the blind flange’s plate thickness and weight are not standardised (“–”) – execution by agreement, available on request.
For DN 10 to DN 40 the blind flange dimensions of pressure ratings PN 10, PN 16 and PN 25 are identical to PN 40; for DN 50 to DN 150 this applies to PN 10 with PN 16 and to PN 25 with PN 40 respectively. For DN 700 and DN 800, pressure rating PN 40 is not standardised.
Order blind flanges
Already know DN, PN and material? Zickwolff supplies blind flanges to EN 1092-1 in carbon and stainless steel, in all common pressure ratings – from Germany, across Europe.
Send us your inquiryHow 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 documents from manufacturing works and suppliers and against our own range. Each value states what kind of value it is: specified by the standard, calculated by us or customary in the trade. The currently valid standard is binding. It is available from DIN Media or from your national standards body. How we select our sources and keep them up to date: About this knowledge.
Technical basis: EN 1092-1. All information without guarantee – the current standard texts and the manufacturers’ technical data sheets always prevail. Values selected according to our delivery and stock programme; compiled from our own ERP data and long-standing trading practice, cross-checked against publicly available manufacturer information and reference tables. These tables do not replace the standard text – the current edition of the standard always governs.