SIST EN 12627:2018
(Main)Industrial valves - Butt welding ends for steel valves
Industrial valves - Butt welding ends for steel valves
This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1 400 designed to be butt welded to standardized pipes.
NOTE The outside diameters and wall thickness of standardized pipes are in accordance with ISO 4200.
Industriearmaturen - Anschweißenden für Armaturen aus Stahl
Diese Europäische Norm legt die Maße für Anschweißenden von Armaturen aus Stahl DN 8 bis DN 1 400 fest, die an genormte Rohrleitungen angeschweißt werden.
ANMERKUNG Außendurchmesser und Wanddicken von genormten Rohren nach ISO 4200.
Robinetterie industrielle - Extrémités à souder en bout pour appareils de robinetterie en acier
La présente Norme européenne spécifie les dimensions des extrémités à souder en bout pour appareils de robinetterie en acier DN 8 à DN 1 400 conçus pour être soudés en bout à des tubes normalisés.
NOTE Les diamètres extérieurs et les épaisseurs des tubes normalisés sont conformes à l’ISO 4200.
Industrijski ventili - Zunanji varilni nastavki za jeklene ventile
Ta evropski standard določa dimenzije zunanjih varilnih nastavkov jeklenih ventilov od DN 8 do DN 1400, zasnovanih za soležno varjenje na standardizirane cevi.
OPOMBA: Zunanji premeri in debelina stene standardiziranih cevi so v skladu s standardom ISO 4200.
General Information
- Status
- Published
- Public Enquiry End Date
- 07-Aug-2016
- Publication Date
- 13-Dec-2017
- Technical Committee
- TLP - Pressure vessels
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 08-Dec-2017
- Due Date
- 12-Feb-2018
- Completion Date
- 14-Dec-2017
Relations
- Effective Date
- 01-Jan-2018
Overview
SIST EN 12627:2018 is a European Standard developed by CEN that specifies the dimensions and design requirements for butt welding ends of steel industrial valves ranging from DN 8 to DN 1400. This standard ensures compatibility of valve ends with standardized steel pipes intended for butt welding connections. It harmonizes dimensional tolerances and welding end profiles to facilitate reliable, high-quality welding for steel valves in industrial piping systems.
The standard references ISO 4200 for pipe outer diameters and wall thicknesses, helping maintain uniformity across components. SIST EN 12627:2018 supersedes the previous 1999 edition, featuring updated tolerance values and the introduction of an angle α parameter, critical for weld preparation.
Key Topics
Scope and Application
Defines butt welding end dimensions specifically for steel valves intended to be welded directly to standardized steel pipes.Dimensional Specifications
Provides precise outside diameters (∅A), inside diameters (∅B), and wall thickness choices for valve ends according to the nominal diameter (DN) of pipes.- Suitable for valve nominal sizes DN 8 through DN 1400.
- Tailors welding end designs to match pipe wall thickness ranges:
- ≤ 4 mm: square end preparation.
4 mm to ≤ 22 mm: single-V bevel shape.
22 mm: single-V bevel with root face.
Welding Angles (α)
Specifies two types of welding angles for butt joints:- Type A: 30° ±5° (per EN 1092-1)
- Type B: 37.5° ±2.5° (per ASME B16.25)
Material and Thickness Compensation
Provides formulas to increase valve end thickness if the valve material’s allowable stress is less than the pipe material, ensuring mechanical integrity of the welded joint.Machining and Surface Preparation
Mandates complete machining of inside and outside surfaces of welding ends to ensure proper fit and weld quality.Designation Format
Standardizes how butt welding ends are labeled, incorporating the standard reference, figure number, and valve nominal size for consistent identification.
Applications
SIST EN 12627:2018 is vital for industries requiring durable and standardized connections between steel valves and pipes, including:
Petrochemical and Chemical Plants
Ensuring leak-tight steel valve assembly in hazardous or high-pressure fluid systems.Power Generation
Reliable valve-pipe joints critical for steam, water, and gas flow control.Water Treatment and Distribution
Facilitates safe and standardized installation of valves in large-scale infrastructure pipelines.Oil and Gas Sector
Supports welding compatibility for valves handling crude oil and refined products in high-pressure pipelines.General Industrial Piping Systems
Used broadly wherever steel valves need secure butt-welded connections for fluid and gas control.
Related Standards
ISO 4200 – Specifies dimensions and masses per unit length for plain end steel tubes, which EN 12627 references for pipe outside diameter and wall thickness.
EN 736 (Parts 1-3) – Provides terminology for valves and components essential for clear communication in conjunction with EN 12627.
EN 1092-1 – Covers circular steel flanges and their joints, cited in EN 12627 for welding angle specification.
ASME B16.25 – Technical standard specifying butt welding ends, harmonized within EN 12627 for global compatibility.
By adhering to SIST EN 12627:2018, manufacturers and engineers can guarantee that steel valve butt welding ends meet European dimensional standards, contributing to the safety, interchangeability, and quality of welded valve-pipe joints in industrial applications worldwide.
Frequently Asked Questions
SIST EN 12627:2018 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Industrial valves - Butt welding ends for steel valves". This standard covers: This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1 400 designed to be butt welded to standardized pipes. NOTE The outside diameters and wall thickness of standardized pipes are in accordance with ISO 4200.
This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1 400 designed to be butt welded to standardized pipes. NOTE The outside diameters and wall thickness of standardized pipes are in accordance with ISO 4200.
SIST EN 12627:2018 is classified under the following ICS (International Classification for Standards) categories: 23.060.01 - Valves in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 12627:2018 has the following relationships with other standards: It is inter standard links to SIST EN 12627:2000. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 12627:2018 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 SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2018
1DGRPHãþD
SIST EN 12627:2000
Industrijski ventili - Zunanji varilni nastavki za jeklene ventile
Industrial valves - Butt welding ends for steel valves
Industriearmaturen - Anschweißenden für Armaturen aus Stahl
Robinetterie industrielle - Extrémités à souder en bout pour appareils de robinetterie en
acier
Ta slovenski standard je istoveten z: EN 12627:2017
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12627
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2017
EUROPÄISCHE NORM
ICS 23.060.01 Supersedes EN 12627:1999
English Version
Industrial valves - Butt welding ends for steel valves
Robinetterie industrielle - Extrémités à souder en bout Industriearmaturen - Anschweißenden für Armaturen
pour appareils de robinetterie en acier aus Stahl
This European Standard was approved by CEN on 18 September 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12627 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols . 4
5 Requirements . 4
5.1 Selection of angle α . 4
5.2 Selection of other dimensions . 5
6 Designation. 9
Bibliography . 10
European foreword
This document (EN 12627:2017) has been prepared by Technical Committee CEN/TC 69 “Industrial
valves”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2018, and conflicting national standards shall be
withdrawn at the latest by May 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12627:1999.
The main changes compared to the previous edition are:
a) change of the tolerance value and diameter for DN 65 in Table 2;
b) introduction of angle α in Figures 2, 3, 4, 5 and 6.
c) editorial revision of this standard;
d) deletion of Annex A giving the basis document from which the previous edition was taken.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This European Standard
...
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