ISO 4798:1997
(Main)Laboratory glassware — Filter funnels
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
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ISO 4798:2009
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
SIST ISO 4798:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 4798:2009
---------------------- Page: 2 ----------------------
SIST ISO 4798:2009
IS0
INTERNATIONAL
4798
STANDARD
First edition
1997-05-O 1
Laboratory glassware - Filter funnels
Verrerie de laboratoire - Entonnoirs 2 filtrer
Reference number
IS0 4798: 1997(E)
---------------------- Page: 3 ----------------------
SIST ISO 4798:2009
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 central@iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=centraI
Printed in Switzerland
ii
---------------------- Page: 4 ----------------------
SIST ISO 4798:2009
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.
---------------------- Page: 5 ----------------------
SIST ISO 4798:2009
@ 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 Construction
5.1 General appearance
The funnel shall consist of a bowl, having the shape of a right circular cone, and a stem which
shall be coaxial with the bowl.
5.2 Bowl
5.2.1 The wall of the bowl shall diverge form the axis of the funnel so as to give an included
angle of 60°-~o.
5.2.2 In plain filter funnels, the bowl shall be plain or with a beaded rim.
5.2.3 In analytical funnels, the bowl shall either be plain or ribbed internally or externally. Where
the bowl
...
IS0
INTERNATIONAL
4798
STANDARD
First edition
1997-05-O 1
Laboratory glassware - Filter funnels
Verrerie de laboratoire - Entonnoirs 2 filtrer
Reference number
IS0 4798: 1997(E)
---------------------- Page: 1 ----------------------
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 central@iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=centraI
Printed in Switzerland
ii
---------------------- Page: 2 ----------------------
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.
---------------------- Page: 3 ----------------------
@ 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 Construction
5.1 General appearance
The funnel shall consist of a bowl, having the shape of a right circular cone, and a stem which
shall be coaxial with the bowl.
5.2 Bowl
5.2.1 The wall of the bowl shall diverge form the axis of the funnel so as to give an included
angle of 60°-~o.
5.2.2 In plain filter funnels, the bowl shall be plain or with a beaded rim.
5.2.3 In analytical funnels, the bowl shall either be plain or ribbed internally or externally. Where
the bowl is ribbed externally, there shall be at least three such ribs evenly spaced round the bowl.
5.3 Rim
The rim of the bowl shall be fire-polished, beaded or ground to a plane surface with the outside
slightly bevelled. Any rim bead should not project internally so as to interfere with the lie of the
filter paper.
5.4 Stem
5.4.1 In plain filter funnels, the stem should consist of a separate piece of tubing joined neatly
and securely to the bowl, or be drawn out from the bowl. The stem may be slightly tapered from
the upper to the lower end.
5.4.2 In analytical filter funnels, the stem shall consist of a separate piece of tubing joined neatly
and securely to
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.