SIST EN ISO 6412-2:2018

Technical product documentation - Simplified representation of pipelines - Part 2: Isometric projection (ISO 6412-2:2017)

ISO 6412-2:2017 specifies supplementary rules, in addition to the general rules given in ISO 6412-1, applicable to isometric representation. Isometric representation is used where it is necessary to show the essential features clearly in three dimensions.

Technische Produktdokumentation - Vereinfachte Darstellung von Rohrleitungen - Teil 2: Isometrische Darstellung (ISO 6412-2:2017)

Documentation technique de produits - Représentation simplifiée des tuyaux et lignes de tuyauteries - Partie 2: Projection isométrique (ISO 6412-2:2017)

ISO 6412-2:2017 spécifié les règles complémentaires aux règles générales données dans l'ISO 6412‑1, applicables à la représentation isométrique. La représentation isométrique est utilisée lorsqu'il est nécessaire de montrer les éléments essentiels clairement en trois dimensions.

Tehnična dokumentacija izdelkov - Poenostavljeno prikazovanje cevovodov - 2. del: Izometrična projekcija (ISO 6412-2:2017)

Ta dokument določa dodatna pravila k splošnim pravilom, podanim v standardu ISO 6412-1, ki se uporabljajo za izometrično predstavitev. Izometrična predstavitev se uporablja tam, kjer je treba prikazati ključne značilnosti na jasen način v treh dimenzijah.

General Information

• Status: Published
• Public Enquiry End Date: 02-Oct-2017
• Publication Date: 11-Mar-2018
• ICS: 01.100.20 - Mechanical engineering drawings
• ICS: 01.110 - Technical product documentation
• ICS: 23.040.01 - Pipeline components and pipelines in general
• Technical Committee: TRS - Technical drawings, quantities, units, symbols and graphical symbols
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2018
• Due Date: 06-May-2018
• Completion Date: 12-Mar-2018
• Ref Project: EN ISO 6412-2:2018 - Technical product documentation - Simplified representation of pipelines - Part 2: Isometric projection (ISO 6412-2:2017)

Relations

• Replaces: SIST EN ISO 6412-2:1998 - Technical drawings - Simplified representation of pipelines - Part 2: Isometric projection (ISO 6412-2:1989)
• Effective Date: 01-Apr-2018

Overview

EN ISO 6412-2:2018 (ISO 6412-2:2017) - Technical product documentation - Simplified representation of pipelines - Part 2: Isometric projection - specifies supplementary rules for producing clear three‑dimensional pipeline isometrics. Intended as an addendum to ISO 6412-1, this standard defines how to show essential pipeline features in isometric projection for tender, manufacturing and erection drawings. The document was prepared by ISO/TC 10 and adopted by CEN as EN ISO 6412-2:2018.

Key topics

• Scope and coordination: Applies where isometric representation is needed in technical product documentation and ties into the general rules of ISO 6412-1.
• Coordinates and axes: Guidance on Cartesian coordinates for pipe assemblies and how coordinates must align with the overall installation.
• Line conventions and projections: Line types and isometric drawing conventions consistent with ISO 128-20 and ISO 129-1.
• Deviations from coordinate axes: Rules for representing pipes that are not parallel to coordinate planes using auxiliary hatched projection planes and specific projection methods for pipes in vertical/horizontal planes.
• Dimensioning rules: Supplementary rules for diameters and wall thickness, longitudinal and angular dimensions, bending radii and angles, levels and slopes, positions of pipe ends, redundant dimensioning, and instructions for dimensioning for pipe‑bending machines.
• Graphical symbols: Examples and conventions for valves, transition pieces (cones), supports and hangers, crossings, permanent junctions, general connections and flanges when drawn isometrically.
• Examples and implementation: Illustrative examples to help apply the rules in practical isometric pipeline drawings.

Applications

• Producing pipeline isometric drawings for process plants, mechanical engineering and construction projects.
• Creating manufacturing and erection drawings that reduce drafting time while improving clarity of three‑dimensional relationships.
• Preparing documents for procurement, fabrication (including pipe‑bending machines) and on‑site installation where unambiguous 3D representation is necessary.
• Standardizing how pipeline assemblies are communicated across engineering, fabrication and construction teams.

Who uses this standard

• Piping designers and engineers
• CAD technicians and drafters producing isometrics
• Plant and mechanical engineering firms
• Fabricators, erection contractors and machine programmers
• Procurement and quality teams relying on consistent technical product documentation

Related standards

• ISO 6412-1 (General rules and orthogonal representation)
• ISO 128-20 (Presentation)
• ISO 129-1 (Dimensioning and tolerances)
• ISO 3545-1, ISO 5261 (symbols and simplified representations)

Using EN ISO 6412-2:2018 ensures consistent, industry‑accepted isometric projection of pipelines, improving communication and reducing errors in pipeline design, fabrication and installation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2018
1DGRPHãþD
SIST EN ISO 6412-2:1998
7HKQLþQDGRNXPHQWDFLMDL]GHONRY3RHQRVWDYOMHQRSULND]RYDQMHFHYRYRGRY
GHO,]RPHWULþQDSURMHNFLMD,62
Technical product documentation - Simplified representation of pipelines - Part 2:
Isometric projection (ISO 6412-2:2017)
Documentation technique de produits - Représentation simplifiée des tuyaux et lignes de
tuyauteries - Partie 2: Projection isométrique (ISO 6412-2:2017)
Ta slovenski standard je istoveten z: EN ISO 6412-2:2018
ICS:
01.100.20 Konstrukcijske risbe Mechanical engineering
drawings
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 6412-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 01.100.99; 23.040.01 Supersedes EN ISO 6412-2:1994
English Version
Technical product documentation - Simplified
representation of pipelines - Part 2: Isometric projection
(ISO 6412-2:2017)
Documentation technique de produits - Représentation
simplifiée des tuyaux et lignes de tuyauteries - Partie 2:
Projection isométrique (ISO 6412-2:2017)
This European Standard was approved by CEN on 22 October 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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6412-2:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 6412-2:2018) has been prepared by Technical Committee ISO/TC 10 “Process
plant documentation”.
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 August 2018, and conflicting national standards shall
be withdrawn at the latest by August 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 ISO 6412-2:1994.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 6412-2:2017 has been approved by CEN as EN ISO 6412-2:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 6412-2
Second edition
2017-12
Technical product documentation —
Simplified representation of
pipelines —
Part 2:
Isometric projection
Documentation technique de produits — Représentation simplifiée
des tuyaux et lignes de tuyauteries —
Partie 2: Projection isométrique
Reference number
ISO 6412-2:2017(E)
©
ISO 2017
ISO 6412-2:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
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ii © ISO 2017 – All rights reserved

ISO 6412-2:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Coordinates . 1
5 Line conventions . 2
6 Deviations from the direction of coordinate axes . 2
6.1 General . 2
6.2 Pipes in a vertical plane . 2
6.3 Pipes in a horizontal plane . 2
6.4 Pipes not parallel to any coordinate plane. 3
6.5 Auxiliary projection planes . 3
7 Dimensioning and special rules . 4
7.1 General . 4
7.2 Diameters and wall thickness . 4
7.3 Longitudinal and angular dimensions . 4
7.4 Pipes with bends . 4
7.5 Radii and angles of bends . 4
7.6 Levels . 5
7.7 Direction of slope . 5
7.8 Positions of ends of pipes . 6
7.9 Redundant dimensioning . 6
7.10 Dimensioning for pipe-bending machines . 6
8 Graphical symbols . 6
8.1 General . 6
8.2 Examples of graphical symbols drawn with the isometric projection method . 7
8.2.1 Valves . 7
8.2.2 Transition pieces (cones) . 7
8.2.3 Supports and hangers. 8
8.2.4 Crossings . 8
8.2.5 Permanent junctions . 8
8.2.6 General connections. 8
8.2.7 Flanges . 9
9 Examples . 9
Bibliography .12
ISO 6412-2:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the
...