Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature (ISO 13916:2025)

This document specifies requirements for the measurement of preheating temperature, interpass temperature and preheat maintenance temperature for fusion welding. This document can also be applied as appropriate in the case of other welding processes. This document does not apply to the measurement of post weld heat treatment temperatures.

Schweißen - Messung der Vorwärm-, Zwischenlagen- und Haltetemperatur (ISO 13916:2025)

Dieses Dokument legt die Anforderungen für die Messung der Vorwärm-, Zwischenlagen- und Haltetemperatur für das Schmelzschweißen fest. Soweit es geeignet ist, kann dieses Dokument auch für andere Schweißprozesse angewendet werden. Dieses Dokument ist nicht anwendbar für die Temperaturmessung bei der Wärmenachbehandlung.

Soudage - Mesurage de la température de préchauffage, de la température entre passes et de la température de maintien du préchauffage (ISO 13916:2025)

Le présent document définit les prescriptions relatives à la mesure de la température de préchauffage, de la température entre passes et de la température de maintien du préchauffage lors du soudage par fusion. Le présent document peut également s’appliquer si nécessaire à d’autres procédés de soudage. Le présent document ne s'applique pas à la mesure des températures lors du traitement thermique après soudage.

Varjenje - Merjenje temperature predgrevanja, medvarkovne temperature in vzdrževanje temperature predgrevanja (ISO 13916:2025)

Ta dokument določa zahteve za merjenje temperature predgrevanja, medvarkovne temperature in vzdrževanje temperature predgrevanja za talilno varjenje. Ta dokument je mogoče po potrebi uporabljati tudi za druge postopke varjenja. Ta dokument se ne uporablja za merjenje temperature za toplotno obdelavo po varjenju.

General Information

Status
Published
Publication Date
02-Sep-2025
ICS
25.160.10 - Welding processes
Technical Committee
CEN/TC 121 - Welding
Drafting Committee
CEN/TC 121/SC 4 - Quality management in the field of welding
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
03-Sep-2025
Completion Date
03-Sep-2025
Ref Project
SIST EN ISO 13916:2025 - Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature (ISO 13916:2025)

Relations

Replaces
EN ISO 13916:2017 - Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature (ISO 13916:2017)
Effective Date
15-Nov-2023

Overview

EN ISO 13916:2025 - “Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature” (ISO 13916:2025) is a CEN-adopted international standard that defines how to measure and record temperatures critical to fusion welding. It applies primarily to fusion welding (and can be used for other welding processes as appropriate) and excludes post‑weld heat treatment temperature measurement. The document replaces the 2017 edition and provides practical rules for point of measurement, timing, equipment and recordkeeping to ensure repeatable, auditable temperature control during welding.

Key topics and requirements

  • Point of measurement
    • For weld thickness t ≤ 50 mm: measure on the surface facing the welder at a distance A = 4 × t (maximum 50 mm) from the groove edge.
    • If heat source is outside the groove, measure on the weld metal or parent metal immediately adjacent to the weld preparation.
    • For t > 50 mm: required temperature must exist at minimum 75 mm (or agreed distance) from the joint prep; measure on the opposite face where practicable or confirm after temperature equalization.
    • Allow temperature equalization of about 2 minutes per 25 mm of parent metal thickness when confirming on the heated face.
  • Time of measurement
    • Interpass temperature: measure immediately prior to the next weld run.
    • Preheat maintenance temperature: monitor during welding interruptions.
  • Equipment
    • Acceptable devices include temperature-sensitive materials (crayons/paints), contact thermometers (CT), thermocouples (TE), and contactless optical/electrical devices (TB).
    • Calibration/validation guidance referenced to ISO 17662.
  • Records and designation
    • Measurement records should reference EN ISO 13916:2025 and include measured preheating, interpass and preheat maintenance temperatures (°C) and any deviations.
    • Standardized designation examples are provided (e.g., "Temperature ISO 13916:2025 T 155 - CT").

Applications and users

  • Who uses it:
    • Welding engineers, welding procedure specification (WPS) authors, quality managers, inspectors, fabricators and contractors working in structural, pressure vessel, pipeline, offshore, and heavy fabrication industries.
  • Practical uses:
    • Defining and verifying preheat and interpass controls in WPS/PQR documentation.
    • Supporting quality assurance, inspection, and regulatory compliance where controlled preheat is required to avoid cracking or metallurgical issues.
    • Standardizing temperature measurement and records for audits and contractor handovers.

Related standards

  • ISO 17662 - Calibration, verification and validation of equipment used for welding (referenced for equipment calibration).
  • EN ISO 13916:2017 - previous edition superseded by EN ISO 13916:2025.

Keywords: EN ISO 13916:2025, preheating temperature, interpass temperature, preheat maintenance temperature, welding temperature measurement, welding procedure specification, thermocouple, contact thermometer, ISO 17662.

Frequently Asked Questions

EN ISO 13916:2025 is a standard published by the European Committee for Standardization (CEN). Its full title is "Welding - Measurement of preheating temperature, interpass temperature and preheat maintenance temperature (ISO 13916:2025)". This standard covers: This document specifies requirements for the measurement of preheating temperature, interpass temperature and preheat maintenance temperature for fusion welding. This document can also be applied as appropriate in the case of other welding processes. This document does not apply to the measurement of post weld heat treatment temperatures.

This document specifies requirements for the measurement of preheating temperature, interpass temperature and preheat maintenance temperature for fusion welding. This document can also be applied as appropriate in the case of other welding processes. This document does not apply to the measurement of post weld heat treatment temperatures.

EN ISO 13916:2025 is classified under the following ICS (International Classification for Standards) categories: 25.160.10 - Welding processes. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 13916:2025 has the following relationships with other standards: It is inter standard links to EN ISO 13916:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase EN ISO 13916:2025 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)


SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN ISO 13916:2018
Varjenje - Merjenje temperature predgrevanja, medvarkovne temperature in
vzdrževanje temperature predgrevanja (ISO 13916:2025)
Welding - Measurement of preheating temperature, interpass temperature and preheat
maintenance temperature (ISO 13916:2025)
Schweißen - Messung der Vorwärm-, Zwischenlagen- und Haltetemperatur (ISO
13916:2025)
Soudage - Mesurage de la température de préchauffage, de la température entre
passes et de la température de maintien du préchauffage (ISO 13916:2025)
Ta slovenski standard je istoveten z: EN ISO 13916:2025
ICS:
17.200.99 Drugi standardi v zvezi s Other standards related to
termodinamiko thermodynamics
25.160.10 Varilni postopki in varjenje Welding processes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13916
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2025
EUROPÄISCHE NORM
ICS 25.160.10 Supersedes EN ISO 13916:2017
English Version
Welding - Measurement of preheating temperature,
interpass temperature and preheat maintenance
temperature (ISO 13916:2025)
Soudage - Mesurage de la température de Schweißen - Messung der Vorwärm-, Zwischenlagen-
préchauffage, de la température entre passes et de la und Haltetemperatur (ISO 13916:2025)
température de maintien du préchauffage (ISO
13916:2025)
This European Standard was approved by CEN on 18 August 2025.

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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13916:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13916:2025) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes " in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” 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 March 2026, and conflicting national standards shall
be withdrawn at the latest by March 2026.
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 13916:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, 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 the
United Kingdom.
Endorsement notice
The text of ISO 13916:2025 has been approved by CEN as EN ISO 13916:2025 without any modification.

International
Standard
ISO 13916
Third edition
Welding — Measurement of
2025-08
preheating temperature, interpass
temperature and preheat
maintenance temperature
Soudage — Mesurage de la température de préchauffage, de la
température entre passes et de la température de maintien du
préchauffage
Reference number
ISO 13916:2025(en) © ISO 2025
ISO 13916:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 13916:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 Point of measurement .1
4.2 Time of measurement .3
4.3 Equipment .3
5 Measurement records . 3
6 Designation . 3
6.1 General .3
6.2 Example 1 .3
6.3 Example 2 .
...

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