SIST ISO 4798:2009

Laboratory glassware - Filter funnels

Specifies requirements and dimensions for glass filter funnels suitable for general laboratory purposes, fitting together with other general-use glassware such as boiling flasks and volumetric flasks.

Verrerie de laboratoire - Entonnoirs à filtrer

Laboratorijska steklovina - Filtrirni liji

General Information

• Status: Published
• Publication Date: 11-Jan-2009
• ICS: 71.040.20 - Laboratory ware and related apparatus
• Technical Committee: I12 - Imaginarni 12 Imaginarni TC za ISO področje - vzdrževani privzeti ISO standardi
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Jan-2009
• Due Date: 16-Mar-2009
• Completion Date: 12-Jan-2009
• Ref Project: ISO 4798:1997 - Laboratory glassware - Filter funnels

Overview

ISO 4798:1997 specifies requirements and dimensional guidance for glass filter funnels intended for general laboratory use. The standard covers geometry, construction, material quality and marking to ensure compatibility with other general-use glassware such as boiling flasks and volumetric flasks. It supports consistent manufacturing and reliable performance across laboratory settings.

Keywords: ISO 4798, filter funnels, laboratory glassware, borosilicate glass, HGB3, dimensions, marking

Key Topics

• Types and sizes

  • Plain filter funnels: bowl diameters listed include 35, 55, 75, 100, 125, 150 and 200 mm.
  • Analytical filter funnels: bowl diameters listed include 55, 75 and 100 mm.

• Material requirements

  • Glass shall comply with the hydrolytic resistance classification of class HGB3 or better as tested per ISO 719.
  • Glass must be free from visible defects and internal stress that would impair funnel performance.
  • At the manufacturer's discretion, funnels may be made from borosilicate glass 3.3 in accordance with ISO 3585.

• Construction and design

  • Funnels consist of a bowl shaped as a right circular cone and a coaxial stem.
  • The bowl wall diverges from the axis to give an included angle of approximately 60°.
  • Rim options include fire-polished, beaded or ground-to-plane finishes; rim beads must not interfere with filter paper seating.
  • Stem construction differs by type: plain funnels may have stems drawn from the bowl or fitted tubing; analytical funnels use a separate, securely joined tubing stem.
  • The end of the stem shall be ground at a minimum angle of 30° to the axis, with the outer edge bevelled or fire-polished.

• Marking

  • Mandatory markings: manufacturer/supplier name or mark and type of glass (if not otherwise identifiable).
  • Optional markings: bowl internal diameter and the ISO 4798 standard number.

Applications

ISO 4798 filter funnels are intended for routine and analytical filtration tasks in chemistry, biology and quality control laboratories. Benefits include:

• Consistent interchangeability with other general-purpose glassware.
• Predictable mechanical and chemical performance when manufactured to specified material classes.
• Clear marking for traceability and material identification.

Typical uses: gravity filtration, sample preparation, routine separations and general laboratory workflows requiring standardized glassware.

Related Standards

Annex A and the normative references list additional standards relevant to laboratory glassware and materials. Key related standards cited in ISO 4798:1997 include:

• ISO 719 - Hydrolytic resistance of glass
• ISO 3585 - Borosilicate glass 3.3
• ISO 383, ISO 384, ISO 641 and other ISO laboratory glassware standards (see annex for full bibliography)

These related standards support material classification, joint interchangeability and broader laboratory glassware design principles to ensure safe and compatible laboratory equipment.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2009
Laboratorijska steklovina - Filtrirni liji
Laboratory glassware - Filter funnels
Verrerie de laboratoire - Entonnoirs à filtrer
Ta slovenski standard je istoveten z: ISO 4798:1997
ICS:
71.040.20 Laboratorijska posoda in Laboratory ware and related
aparati apparatus
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IS0
INTERNATIONAL
STANDARD
First edition
1997-05-O 1
Laboratory glassware - Filter funnels
Verrerie de laboratoire - Entonnoirs 2 filtrer
Reference number
IS0 4798: 1997(E)
IS0 4798:1997(E)
Foreword
IS0 (the international Organization for Standardization) is a worldwide federation of national
standards bodies (IS0 member bodies). The work of preparing International Standards is
normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the member
bodies for voting. Publication as an International Standard requires approval by at least 75 % of
the member bodies casting a vote.
This International Standard IS0 4798 has been prepared by Technical Committee ISO/rC 48,
Laboratory glassware and related apparatus, Subcommittee SC 2, General laboratory glassware
(other than measuring apparatus).
Annex A of this International Standard is for information only.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or mechanical,
without permission in writing from the
including photocopying and microfilm,
publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Get-We 20 l Switzerland
Internet [e-mail]
x.400 c=ch; a=400net; p=iso; o=isocs; s=centraI
Printed in Switzerland
ii
IS0 4798:1997(E)
INTERNATIONAL STANDARD @ IS0
Filter funnels
Laboratory glassware -
1 Scope
This International Standard specifies requirements and dimensions for glass filter funnels suitable
for general laboratory purposes, fitting together with other general-use glassware such as boiling
flasks and volumetric flasks.
Annex A lists additional International Standards for other general-purpose laboratory glassware.
NOTE -
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this International Standard. At the time of publication, the editions indicated were
valid, All standards are subject to revision, and parties to agreements based on this International
Standard are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. Members of IEC and IS0 maintain registers of currently valid
International Standards.
IS0 719:1985, Glass - Hydrolytic resistance of glass grains at 98 “C - Method of test and
classification.
IS0 3585: 1991, Borosilicate glass 3.3 - Properties.
3 Types and sizes
Two types of filter funnels are specified, in sizes as follows (given in millimetres):
3.1 Plain filter funnels of bowl diameter:
35-55-75-100-125-150-200
3.2 Analytical filter funnels of bowl diameter:
55-75-100
4 Material
4.1 When tested in accordance with the procedure and classification given in IS0 719, the glass
shall comply with the requir
...

IS0
INTERNATIONAL
STANDARD
First edition
1997-05-O 1
Laboratory glassware - Filter funnels
Verrerie de laboratoire - Entonnoirs 2 filtrer
Reference number
IS0 4798: 1997(E)
IS0 4798:1997(E)
Foreword
IS0 (the international Organization for Standardization) is a worldwide federation of national
standards bodies (IS0 member bodies). The work of preparing International Standards is
normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to the member
bodies for voting. Publication as an International Standard requires approval by at least 75 % of
the member bodies casting a vote.
This International Standard IS0 4798 has been prepared by Technical Committee ISO/rC 48,
Laboratory glassware and related apparatus, Subcommittee SC 2, General laboratory glassware
(other than measuring apparatus).
Annex A of this International Standard is for information only.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or mechanical,
without permission in writing from the
including photocopying and microfilm,
publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Get-We 20 l Switzerland
Internet [e-mail]
x.400 c=ch; a=400net; p=iso; o=isocs; s=centraI
Printed in Switzerland
ii
IS0 4798:1997(E)
INTERNATIONAL STANDARD @ IS0
Filter funnels
Laboratory glassware -
1 Scope
This International Standard specifies requirements and dimensions for glass filter funnels suitable
for general laboratory purposes, fitting together with other general-use glassware such as boiling
flasks and volumetric flasks.
Annex A lists additional International Standards for other general-purpose laboratory glassware.
NOTE -
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this International Standard. At the time of publication, the editions indicated were
valid, All standards are subject to revision, and parties to agreements based on this International
Standard are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. Members of IEC and IS0 maintain registers of currently valid
International Standards.
IS0 719:1985, Glass - Hydrolytic resistance of glass grains at 98 “C - Method of test and
classification.
IS0 3585: 1991, Borosilicate glass 3.3 - Properties.
3 Types and sizes
Two types of filter funnels are specified, in sizes as follows (given in millimetres):
3.1 Plain filter funnels of bowl diameter:
35-55-75-100-125-150-200
3.2 Analytical filter funnels of bowl diameter:
55-75-100
4 Material
4.1 When tested in accordance with the procedure and classification given in IS0 719, the glass
shall comply with the requirements of class HGB3 or better.

@ IS0
IS0 4798:1997(E)
The glass shall be free from visible defects and shall be free from internal stress which would
impair the performance of the filter funnels.
4.2 At the manufacturer’s discretion, filter funnels may be manufactured from borosilicate
glass 3.3 in accordance with IS0 3585.
5 Co
...