BS-EN-1092-1 Flanges and their joints
BS EN 1092-1 is quite common standard in the flanges industries.We would like to introduce details about EN 1092-1 standard.
EN 1092-1 is the standard specification for Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges
Download BS-EN-1092-1-2018-flanges Standard english version
EN 1092-1 Scope:
This European Standard for a single series of flanges specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000.
This European Standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange jointing face surface finish, marking, materials, pressure/ temperature ratings and approximate flange masses.
For the purpose of this European Standard, “flanges” include also lapped ends and collars.
This European Standard applies to flanges manufactured in accordance with the methods described in Table 1.
Non-gasketed pipe joints are outside the scope of this European Standard
Material
- ANSI/ASME (American National Standards Institute/American Society Mechanical Engineers) B16.5 and B16.47 in forged carbon and stainless steels, typically ASTM/ASME A105; ASTM/ASME A182; ASTM/ASME 350 and other materials.
- DIN (Deutsches Institute fur Normung) forged flange in carbon steel and stainless steel, popular materials like RST37.2, P235GH, P245GH, P250GH, P280GH, etc.
- European standard EN 1092-1, typically stainless steel grade is 1.4401,1.4404,1.4307
- JIS Flange (Japanese Industrial Standards). The JIS is the standard used for all industrial activities in Japan. Common material like SUS304, SUS316, SUS316L, SS400, SFVC2A.
EN 1092-1 Dimension Tolerance
Tolerances on dimensions of flanges and collars shall be as given in Table 22.
General tolerances for dimensions without given tolerance: according to EN 22768-1:1993.
EN 1092-1 Marking Requirement
All fanges, lapped ends and collars, other than type 21 flanges, should be marked as follows:
a) flange/collar manufacturer’s name or trade mark, e.g. XXX;
b) number of this European Standard, i.e. EN 1092-1;
c) flange/collar type number;
d) DN, e.g. DN 150;
e) PN designation, e.g. PN 40 (marking with lower PN numbers, by identical dimensions are possible); f) wall thickness (S), if not according to this European Standard;
g) either the name or the number or the grade of the material, e.g. P245GH;
h) heat number of melt and/or suitable identification, such as code number, for the traceability e.g. A2345, when test certification is required;
EXAMPLE 1 XXX/EN 1092–1/11/DN 150/PN 40/P265GH/A2345; i) additional marking (M) for flanges according to Annex I;
EXAMPLE 2 XXX/EN 1092–1/34M/…
If a part is too small to enable all the markings required then the minimum marking required shall be: — flange/collar manufacturer’s name or trade mark;
— letters “EN”;
— PN designation, e.g. PN 40;
— either the name or the number or the grade of the material;
— heat number of melt and/or suitable identification, such as code number, for the traceability.
5.10.2 Stamping
Marking shall be visible and durable. Where hard stampings are used, the marking shall be positioned on the outer rim of the parts.
It should be ensured that hard stamping markings are not liable to cause cracks in the flange material
Certificate for EN 1092-1 Flanges
Flange manufacturer shall use respective procedures to ensure traceability of material and to avoid material exchange and shall be able to provide respective documentation for the base material used. Under consideration of EN 764-5, the purchaser of the flange may require a test certificate according to EN 10204 (2.1, 3.1 or 3.2), applicable for the respective category. The rules of pressure equipment European legislation and the product specification, which includes the technical delivery conditions, shall be applied. If an inspection certificate 3.1 is required, the quality system of the material manufacturer shall fulfil the requirements of the European legislation for pressure equipment.
Full Production range of EN 1092-1 flanges.
| EN 1092-1: figure 1 (flange types) | ||
|---|---|---|
| Drawn (source: EN 1092-1) | TYPE __ | Full description |
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EN 1092-1 TYPE 01 | Plate flange for welding |
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EN 1092-1 TYPE 02 | Loose plate flange with weld-on plate collar TYPE 32 |
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EN 1092-1 TYPE 02 | Loose plate flange with weld-on plate collar TYPE 33 |
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EN 1092-1 TYPE 04 | Loose plate flange with weld-neck collar TYPE 34 |
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EN 1092-1 TYPE 05 | Blind flange or blank flange |
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EN 1092-1 TYPE 11 | Weld-neck flange |
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EN 1092-1 TYPE 12 | Hubbed slip-on flange for welding |
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EN 1092-1 TYPE 13 | Hubbed threaded flange |
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EN 1092-1 TYPE 21 | LWN – long welding-neck or integral flange |
| EN 1092-1: figure 2 (ancillary components) | ||
|---|---|---|
| Drawn (source: EN 1092-1) | TYPE __ | Full description |
 |
EN 1092-1 TYPE 32 | Weld-on collar plate |
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EN 1092-1 TYPE 33 | Short collar or lapped pipe end |
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EN 1092-1 TYPE 34 | Weld-neck collar |
Learn more about EN 1092
EN 1092 is a series of standard specifications for flanges and their joints – circular flanges for pipes, valves, fittings and accessories, PN designated. These directive codes are released by EU’s standardization organization CEN and they are mainly derived from relative British and German flange standards (BS 4504 & DIN, etc). EN 1092 covers four parts: Part 1(EN 1092-1): steel flanges; Part 2(EN 1092-2): cast iron flanges; Part 3(EN 1092-3): copper alloy flanges; Part 4(EN 1092-4): aluminium alloy flanges. Pressure ratings: from PN 2.5 to PN 400; Nominal size: from DN 10 to DN 4000.
