Laboratory glassware — Boiling flasks with conical ground joints

ISO 4797:2015 specifies requirements for an internationally acceptable series of boiling flasks with conical ground joints for general laboratory purposes.

Verrerie de laboratoire — Fioles coniques et ballons à joint conique rodé

L'ISO 4797:2015 spécifie les exigences requises d'une série internationalement acceptable de fioles coniques et de ballons à joint conique rodé, à usage général dans les laboratoires.

General Information

Status
Published
Publication Date
13-Dec-2015
Current Stage
9020 - International Standard under periodical review
Start Date
15-Jan-2026
Completion Date
15-Jan-2026

Relations

Effective Date
09-Feb-2026
Effective Date
12-Feb-2026
Effective Date
04-May-2013

Overview

ISO 4797:2015 is an international standard developed by the International Organization for Standardization (ISO) that specifies requirements for boiling flasks with conical ground joints used in laboratory settings. Designed for general laboratory purposes, the standard covers a series of boiling flasks made from borosilicate glass 3.3, ensuring durability, compatibility, and safety during typical lab operations. The third edition of this standard, published in December 2015, updates prior versions to include new flask volumes, refined dimensions, and thermal shock endurance testing.

Key Topics

  • Types of Boiling Flasks
    The standard defines three main types of boiling flasks with conical ground joints:

    • Conical flasks
    • Flat-bottom flasks
    • Round-bottom flasks
  • Series and Capacities
    ISO 4797:2015 specifies two series for each type, differing in height and joint size selection. This facilitates compatibility with various laboratory setups and serves as guidelines for national standards adoption.

  • Material Requirements
    All boiling flasks must be made of borosilicate glass 3.3 compliant with ISO 3585. The glass must be free from visible defects or internal stresses that could impact performance during heating or chemical exposure.

  • Dimensions and Joint Specifications
    Dimensions such as overall height, body diameter, and minimum wall thickness must adhere to ISO 1773. Ground glass joints conform to the ISO 383 k6 series, enabling interchangeability among different laboratory glassware.

  • Thermal Shock Endurance
    Testing per ISO 718 ensures boiling flasks resist thermal shock:

    • Flasks ≤ 3,000 ml volume endure up to 150 °C
    • Flasks > 3,000 ml endure up to 100 °C
  • Marking and Identification
    Flasks must be permanently marked with:

    • Nominal volume (e.g., “100 ml”)
    • Ground joint size (e.g., “29/32”)
    • Manufacturer or vendor name/mark
    • Surface suitable for additional marking

    Reference to the ISO 4797 standard is recommended to enhance traceability.

Applications

ISO 4797:2015 boiling flasks are crucial in laboratories conducting chemical synthesis, distillation, reflux, and other heating processes that require durable glassware capable of withstanding thermal stresses. Their conical ground joints allow for secure connections to condensers, adapters, and other apparatus, providing leak-proof seals essential for maintaining system integrity.

Typical application areas include:

  • Research and development labs
  • Quality control and testing facilities
  • Educational laboratories
  • Pharmaceutical manufacturing
  • Chemical analysis and processing

The robust design, material quality, and standardized joint sizes ensure seamless integration into a wide range of laboratory workflows.

Related Standards

ISO 4797:2015 references other important standards to maintain consistency and reliability:

  • ISO 383 - Laboratory glassware: Interchangeable conical ground joints
  • ISO 718 - Laboratory glassware: Thermal shock and thermal shock endurance test methods
  • ISO 1773 - Laboratory glassware: Narrow-necked boiling flasks (dimensional specifications)
  • ISO 3585 - Borosilicate glass 3.3: Properties and requirements

These interconnected standards together provide comprehensive guidelines for manufacturing, testing, and selecting high-quality laboratory glassware.


By adhering to ISO 4797:2015, laboratories worldwide ensure that boiling flasks meet internationally recognized safety, quality, and performance criteria. This standard supports laboratory efficiency and safety by providing compatible, reliable boiling flask designs optimized for thermal resilience and precise glass joint fitting.

Standard

ISO 4797:2015 - Laboratory glassware -- Boiling flasks with conical ground joints

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Standard

ISO 4797:2015 - Verrerie de laboratoire -- Fioles coniques et ballons à joint conique rodé

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Frequently Asked Questions

ISO 4797:2015 is a standard published by the International Organization for Standardization (ISO). Its full title is "Laboratory glassware — Boiling flasks with conical ground joints". This standard covers: ISO 4797:2015 specifies requirements for an internationally acceptable series of boiling flasks with conical ground joints for general laboratory purposes.

ISO 4797:2015 specifies requirements for an internationally acceptable series of boiling flasks with conical ground joints for general laboratory purposes.

ISO 4797:2015 is classified under the following ICS (International Classification for Standards) categories: 71.040.20 - Laboratory ware and related apparatus. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 4797:2015 has the following relationships with other standards: It is inter standard links to EN ISO 4787:2021, EN ISO 4797:2015, ISO 4797:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 4797:2015 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 4797
Third edition
2015-12-15
Laboratory glassware — Boiling flasks
with conical ground joints
Verrerie de laboratoire — Fioles coniques et ballons à joint conique
rodé
Reference number
©
ISO 2015
© ISO 2015, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Types . 1
4 Series of capacities . 1
5 Material . 1
6 Dimensions . 1
7 Ground glass joints . 2
8 Thermal shock endurance . 2
9 Marking . 2
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 right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 48, Laboratory equipment in collaboration with
CEN/TC 332, Laboratory eq
...


NORME ISO
INTERNATIONALE 4797
Troisième édition
2015-12-15
Verrerie de laboratoire — Fioles
coniques et ballons à joint conique
rodé
Laboratory glassware — Boiling flasks with conical ground joints
Numéro de référence
©
ISO 2015
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2015, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Types . 1
4 Séries de capacités . 1
5 Matériau . 1
6 Dimensions . 1
7 Joints en verre rodé . 2
8 Endurance au choc thermique . 2
9 Marquage . 2
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www.
iso.org/directives).
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de
brevets reçues par l’ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer
un engagement.
Pour une explication de la signification des termes et expressions spécifiques de l’ISO liés à
l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de l’ISO aux principes
de l’OMC concernant les obstacles techniques au commerce (OTC), voir le lien suivant: Avant-propos —
Informations supplémentaires.
Le présent document a été élaboré par le comité technique ISO/TC 48, Équipement de laboratoire en
collaboration avec le comité technique CEN/TC 332, Équipement de laboratoire.
Cette troisième édition annule et remplace la deuxième édition (ISO 4797:2004), dont les artic
...

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