EN 1092-1:2018/prA1 - Steel Circular Flanges PN 2.5 to PN 400

Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

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.

Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke und Zubehörteile, nach PN bezeichnet - Teil 1: Stahlflansche

Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie, raccords et accessoires, désignées PN - Partie 1: Brides en acier

Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor z oznako PN - 1. del: Jeklene prirobnice - Dopolnilo A1

General Information

Status

Not Published

Publication Date

07-Mar-2024

ICS

23.040.60 - Flanges, couplings and joints

Technical Committee

CEN/TC 74 - Flanges and their joints

Drafting Committee

CEN/TC 74/WG 2 - Steel flanges

Current Stage

4060 - Closure of enquiry - Enquiry

Start Date

23-Feb-2023

Due Date

13-Jan-2023

Completion Date

23-Feb-2023

Directive

2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment

Mandate

M/071 - Mandate to CEN for standardization in the field of Pressure equipment

M/601 - COMMISSION IMPLEMENTING DECISION of 1.3.2024 on a standardisation request to the European Committee for Standardization and the European Committee for Electrotechnical Standardization as regards pressure equipment and assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council

Ref Project

SIST EN 1092-1:2018/oprA1:2022 - Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

Relations

Amends

EN 1092-1:2018 - Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

Effective Date

24-Oct-2018

Overview

EN 1092-1:2018/prA1 - "Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges" is a European standard that defines a single series of circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes DN 10 to DN 4000. The document covers flange types (including lapped ends and collars), facings, dimensions and tolerances, and the technical requirements needed for reliable flange manufacture and selection in pressure piping systems. The prA1 amendment updates normative references, several tables and figures, and annexes relating to masses, dimensions and manufacturing methods.

Key topics and technical requirements

The standard specifies practical, engineering-focused requirements including:

Flange types and facings (profiles used for bolted flange joints)
Dimensions and tolerances for PN-designated flanges across DN 10–DN 4000
Threading and bolt sizes, including bolting number guidance
Flange jointing face surface finish requirements for gasket seating
Marking and traceability requirements for flanges
Permitted materials and references to material delivery standards
Pressure/temperature ratings associated with PN designations
Approximate flange masses and relevant dimensional data
Manufacturing methods allowed for producing compliant flanges (including forgings, welding, etc.) Notes: For this standard, non-gasketed pipe joints are excluded.

Practical applications

EN 1092-1:2018/prA1 is a foundational specification for:

Selection and procurement of steel flanges for pipelines, valves and fittings
Component design and mechanical engineering for oil & gas, chemical, water, power and process industries
Fabrication and inspection of flanged joints in pressure systems
Ensuring interchangeability and compatibility across suppliers and European markets Using this standard helps ensure consistent fit-up, safe pressure containment, and regulatory compliance for PN-designated flange systems.

Who uses this standard

Mechanical and piping engineers (design and specification)
Flange and valve manufacturers
Quality assurance and inspection teams
Procurement and specification writers
Plant operators and maintenance teams responsible for piping integrity
Notified bodies and conformity assessors for pressure equipment directives

Related standards

EN 1092-1 references and aligns with other standards for materials and testing, for example:

EN 10222-4 (steel forgings for pressure purposes)
EN 10216 / EN 10217 series (seamless and welded tubes for pressure purposes)
EN 13445 (unfired pressure vessels)
Relevant EN ISO test and NDT standards (tensile, penetrant and ultrasonic testing)

Adoption of EN 1092-1:2018/prA1 supports interoperability, safety and regulatory alignment for PN-designated steel flanges in European and international projects.

Draft

EN 1092-1:2018/oprA1:2022

English language

32 pages

sale 10% off

Preview

sale 10% off

Preview

e-Library read for

AI-Chat

1 day

Create e-Library subscription and get permanent access to the document. Subscriptions are available for: 23 23.040 23.040.60

Frequently Asked Questions

What is EN 1092-1:2018/prA1?

EN 1092-1:2018/prA1 is a draft published by the European Committee for Standardization (CEN). Its full title is "Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges". This standard covers: 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.

What is the scope of EN 1092-1:2018/prA1?

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.

What ICS categories does EN 1092-1:2018/prA1 belong to?

EN 1092-1:2018/prA1 is classified under the following ICS (International Classification for Standards) categories: 23.040.60 - Flanges, couplings and joints. The ICS classification helps identify the subject area and facilitates finding related standards.

What standards are related to EN 1092-1:2018/prA1?

EN 1092-1:2018/prA1 has the following relationships with other standards: It is inter standard links to EN 1092-1:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

Is EN 1092-1:2018/prA1 a harmonized European standard?

EN 1092-1:2018/prA1 is associated with the following European legislation: EU Directives/Regulations: 2014/68/EU; Standardization Mandates: M/071, M/601. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

How can I purchase EN 1092-1:2018/prA1?

You can purchase EN 1092-1:2018/prA1 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)

EN 1092-1:2018/oprA1:2022

SLOVENSKI STANDARD
01-december-2022
Prirobnice in prirobnični spoji - Okrogle prirobnice za cevi, ventile, fitinge in pribor
z oznako PN - 1. del: Jeklene prirobnice - Dopolnilo A1
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges
Flansche und ihre Verbindungen - Runde Flansche für Rohre, Armaturen, Formstücke
und Zubehörteile, nach PN bezeichnet - Teil 1: Stahlflansche
Brides et leurs assemblages - Brides circulaires pour tubes, appareils de robinetterie,
raccords et accessoires, désignées PN - Partie 1: Brides en acier
Ta slovenski standard je istoveten z: EN 1092-1:2018/prA1
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 1092-1:2018
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
December 2022
ICS
English Version
Flanges and their joints - Circular flanges for pipes, valves,
fittings and accessories, PN designated - Part 1: Steel
flanges
Brides et leurs assemblages - Brides circulaires pour Flansche und ihre Verbindungen - Runde Flansche für
tubes, appareils de robinetterie, raccords et Rohre, Armaturen, Formstücke und Zubehörteile, nach
accessoires, désignées PN - Partie 1: Brides en acier PN bezeichnet - Teil 1: Stahlflansche
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 74.

This draft amendment A1, if approved, will modify the European Standard EN 1092-1:2018. If this draft becomes an amendment,
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1092-1:2018/prA1:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Modifications to European foreword . 4
2 Modifications to Normative references . 4
3 Modifications to Table 7 . 5
4 Modifications to Figure 5 . 10
5 Modifications to Figure 6 . 11
6 Modifications to Figure 7 . 12
7 Modifications to Figure 8 . 13
8 Modifications to Figure 9 . 14
9 Modifications to Figure 10 . 15
10 Modifications to Table 9 . 16
11 Modifications to Annex C . 18
12 Modifications to Annex D . 30
13 Modification to G.2.2 . 31
14 Modifications to G.3.1 . 31
15 Modifications to Annex I . 32

European foreword
This document (EN 1092-1:2018/prA1:2022) has been prepared by Technical Committee CEN/TC 74
“Flanges and their joints”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
In comparison with the previous edition, the following technical modifications have been made:
— Editorial modifications
— Modification and update the clause “Normative references”
— Modifications to Table 7 “Synoptic table”
— Modifications on some figures
— Modifications to Annex C “Masses of flanges”
— Modifications to Annex D “Table D.1”
— Modifications to Annex G “G.3.1 General”
— Modifications to Annex I “Table I.3”
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of
EN 1092-1:2018.
1 Modifications to European foreword
Change d) to the following:
“d) flanges Type 05 for PN 160 to PN 400 were implemented.”
2 Modifications to Normative references
Add the following:
EN 10222-4:2017+A1, Steel forgings for pressure purposes - Part 4: Weldable fine grain steels with high
proof strength
EN 10216-2:2013+A1:2019, Seamless steel tubes for pressure purposes - Technical delivery conditions -
Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10216-5:2021, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5:
Stainless steel tubes
EN 10217-3:2019, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 3: Electric
welded and submerged arc welded alloy fine grain steel tubes with specified room, elevated and low
temperature properties
EN 10217-7:2021, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7:
Stainless steel tubes
EN 13445-3:2021, Unfired pressure vessels - Part 3: Design
EN ISO 3452-1:2021, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-
1:2021)
EN ISO 6892-1:2019, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1:2019)
EN ISO 11666:2018, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO
11666:2018)
EN ISO 17640:2018, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and
assessment (ISO 17640:2018)
3 Modifications to Table 7
Replace Table 7:
Table 7 — Synoptic table
DN
Flange type or collar type
PN
dimensions identical with PN 6 X
2,5
6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X X X X
PN 40
a) Type 01
25 dimensions identical with PN 40 X X X X X X X X X X
40 X X X X X X X X X X X X X X X X X
dimensions identical with
63 X X X X X X X X X X X
PN 100
100 X X X X X X X X X X X X X X X X
2,5 dimensions identical with PN 6
6 X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X
PN 40
b) Types 02 and 32
25 dimensions identical with PN 40 X X X X X X X X
40 X X X X X X X X X X X X X X X X X X X X
2,5 dimensions identical with PN 6
6 X X X X X X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X X X X X X
PN 40 PN 16
1 000
1 200
1 400
1 600
1 800
2 000
2 200
2 400
2 600
2 800
3 000
3 200
3 400
3 600
3 800
4 000
DN
Flange type or collar type
PN
dimensions identical with
16 X X X X X X X X X X X X X X X X X
X
PN 40
25 dimensions identical with PN 40 X X X X X X X X X X X

40 X X X X X X X X X X X X X X X X X
c) Types 02 and 35
2,5 dimensions identical with PN 6
6 X X X X X X X X X X X X X X X X X X X
10 dimensions identical with PN 16 X X X X X

16 X X X X X X X X X X X X X X X X X
d) Type 02 and 36
dimensions
dimensions identical with PN 16 identical with
2,5
PN 10
dimensions
6 dimensions identical with PN 16 identical with
PN 10
e) Type 02 and 33/37
10 dimensions identical with PN 16 X X X
16 X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X
PN 40
25 dimensions identical with PN 40 X X X X X X X X
f) Type 04 and 34
40 X X X X X X X X X X X X X X X X X
1 000
1 200
1 400
1 600
1 800
2 000
2 200
2 400
2 600
2 800
3 000
3 200
3 400
3 600
3 800
4 000
DN
Flange type or collar type
PN
2,5 dimensions identical with PN 6 X
6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X X X X X
PN 40
25 dimensions identical with PN 40 X X X X X X X X
40 X X X X X X X X X X X X X X X X X X X X
63 Use PN 100 X X X X X X X X X X X
100 X X X X X X X X X X X X X X X X
160 X X X X X X X X X X X X X
g) Type 05
250 X X X X X X X X X X X
320 X X X X X X X X X X X X
400 X X X X X X X X X X X
2,5 dimensions identical with PN 6 X X X X X X X X X X X X X X X X X
6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X X X X X X X X X X X X X X X
PN 40 PN 16
h) Type 11
dimensions identical with
16 X X X X X X X X X X X X X X X X X X X X X X
X
PN 40
dimensions identical with PN 10

1 000
1 200
1 400
1 600
1 800
2 000
2 200
2 400
2 600
2 800
3 000
3 200
3 400
3 600
3 800
4 000
DN
Flange type or collar type
PN
25 dimensions identical with PN 40 X X X X X X X X X X X X
40 X X X X X X X X X X X X X X X X X X X X
dimensions identical with
63 X X X X X X X X X X X
PN 100
100 X X X X X X X X X X X X X X X X
160 X X X X X X X X X X X X X

250 X X X X X X X X X X X
320 X X X X X X X X X X X X
400 X X X X X X X X X X X
6 X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X X X X X
PN 40
25 dimensions identical with PN 40 X X X X X X X X
i) Type 12
40 X X X X X X X X X X X X X X X X X X X X
dimensions identical with
63 X X X X X X
PN 100
100 X X X X X X X X X X X X
dimensions identical with PN 10

1 000
1 200
1 400
1 600
1 800
2 000
2 200
2 400
2 600
2 800
3 000
3 200
3 400
3 600
3 800
4 000
DN
Flange type or collar type
PN
6 X X X X X X X X X X X X
dimensions identical with dimensions identical with
PN 40 PN 16
dimensions identical with
16 X X X X X X
PN 40
25 dimensions identical with PN 40
j) Type 13
40 X X X X X X X X X X X X
dimensions identical with
63 X X X X X X
PN 100
100 X X X X X X X X X X X X
2,5 X X X X X X X X X X X X X X X X X X X X X X X X
6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
dimensions identical with dimensions identical with
10 X X X X X X X X X X X X X X X X X
PN 40 PN 16
dimensions identical with
16 X X X X X X X X X X X X X X X X X X X X X X X
PN 40
25 dimensions identical with PN 40 X X X X X X X X X X X X
40 X X X X X X X X X X X X X X X X X X X X

dimensions identical with
63 X X X X X X X X X X X
k) Type 21
PN 100
100 X X X X X X X X X X X X X X X X
160 X X X X X X X X X X X X X
250 X X X X X X X X X X X X X
320 X X X X X X X X X X X X
400 X X X X X X X X X X X
1 000
1 200
1 400
1 600
1 800
2 000
2 200
2 400
2 600
2 800
3 000
3 200
3 400
3 600
3 800
4 000
4 Modifications to Figure 5
Replace Figure 5:
a) b) Type 01 c)Type 05 d) Type 11 e) Type 02 and 35 f) Type 02 and 36 g) Type 02 and 37
This diagram illustrates the
arrangement but not necessarily the
correct number of bolt holes.
Refer to the column “Bolting
Number” in Table 10 for the actual
number.
h) Type 21
NOTE 1 Dimension N1 is measured at the intersection of the hub draft angle and the back face of the flange.
NOTE 2 For dimension Gmax, refer to NOTE 1 of 5.6.1.
Figure 5 — Dimensions of PN 2,5 flanges
5 Modifications to Figure 6
Replace Figure 6:
a) b) Type 01 c) Type 02 and 32 d) Type 02 and 33 e) Type 02 and 35 f) Type 02 and 36 g) Type 02 and 37
This diagram illustrates the
arrangement but not necessarily the
correct number of bolt holes.
Refer to the column “Bolting Number”
in Table 11 for the actual number.

h) Type 05 i) Type 11 j) Type 12 k) Type 13 l) Type 21
NOTE 1 Dimensions N1, N2 and N3 are measured at the intersection of the hub draft angle and the back face of the flange.
NOTE 2 For dimension d1, see Table 8.
NOTE 3 For dimensions G refer to NOTE 1 of 5.6.1.
max
NOTE 4 Type 33; lapped pipe end without determination of thickness and height.
Figure 6 — Dimensions of PN 6 flanges
6 Modifications to Figure 7
Replace Figure 7:
a) b) Type 01 c) Type 02 and 32 d) Type 02 and 33 e) Type 02 and 35 f) Type 02 and 36 g) Type 02 and 37
This diagram illustrates the
arrangement but not
necessarily the correct number
of bolt holes.
Refer to the column “Bolting
Number” in Table 12 for the
actual number.
h) Type 04 and 34 i) Type 05 j) Type 11 k) Type 12 l) Type 13 m) Type 21
NOTE 1 Dimensions N , N and N are measured at the intersection of the hub draft angle and the back face of the flange.
1 2 3
NOTE 2 For dimension d1, see Table 8.
NOTE 3 For dimensions Gmax refer to NOTE 1 of 5.6.1.
NOTE 4 Type 33; lapped pipe end without determination of thickness and height.
Figure 7 — Dimensions of PN 10 flanges
---------------------- Page
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...