SIST EN ISO 3262-22:2023

Extenders - Specifications and methods of test - Part 22: Flux-calcined kieselguhr (ISO 3262-22:2023)

This document specifies requirements and corresponding methods of test for flux-calcined kieselguhr.

Füllstoffe - Anforderungen und Prüfverfahren - Teil 22: Kieselgur, fluxcaliniert (ISO 3262 22:2023)

Dieses Dokument legt Anforderungen und entsprechende Prüfverfahren für fluxcalcinierten Kieselgur fest.

Matières de charge - Spécifications et méthodes d'essai - Partie 22: Kieselguhr calciné en présence d’un fondant (ISO 3262‑22:2023)

Le présent document spécifie les exigences relatives au kieselguhr calciné en présence d’un fondant et les méthodes d'essai correspondantes.

Polnila - Specifikacije in preskusne metode - 22. del: Kremenka, kalcinirano topilo (ISO 3262-22:2023)

Ta dokument določa zahteve in ustrezne preskusne metode za s tokom kalcinirano diatomejsko zemljo.

General Information

• Status: Published
• Public Enquiry End Date: 24-Mar-2023
• Publication Date: 22-Aug-2023
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: PIP - Pigments and extenders
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Jul-2023
• Due Date: 17-Sep-2023
• Completion Date: 23-Aug-2023
• Ref Project: EN ISO 3262-22:2023 - Extenders - Specifications and methods of test - Part 22: Flux-calcined kieselguhr (ISO 3262-22:2023)

Relations

• Replaces: SIST EN ISO 3262-22:2002 - Extenders for paints - Specifications and methods of test - Part 22: Flux-calcined kieselguhr (ISO 3262-22:2001)
• Effective Date: 01-Oct-2023

Overview

EN ISO 3262-22:2023 - Extenders: Specifications and methods of test - Part 22: Flux‑calcined kieselguhr (ISO 3262-22:2023) specifies quality requirements and laboratory test methods for flux‑calcined diatomaceous earth (kieselguhr) used as an extender in coatings, rubber and other materials. The standard updates and replaces the 2001 edition, aligning product grades, analytical procedures and reporting requirements for consistent quality control across CEN/ISO member countries.

Key topics and technical requirements

The standard defines essential characteristics, required test methods and sampling/reporting rules. Principal topics include:

• Material definition: Flux‑calcined kieselguhr is a diatomaceous siliceous material calcined with a flux (e.g., soda ash or salt) at high temperature (~1 148 °C), producing a white, low‑iron glassy product.
• Essential requirements (examples of parameters specified):
  • Silica (SiO2) content - minimum values specified (e.g., Grade A ≥ 85 % mass fraction; see Clause 6 for determination).
  • Loss on ignition (LOI) - maximum specified.
  • pH of aqueous suspension - specified range (7.0 to 10.5).
  • Matter soluble in water and matter volatile at 105 °C - maximum limits.
  • Residue on sieve / particle size indicators, specific surface area and oil absorption - grade‑dependent limits (oil absorption example: Grade A 120–200 g/100 g; Grade B 90–140 g/100 g).
• Test methods: References established ISO test methods (ISO 787 series, ISO 5794‑1, ISO 3262‑1). The silica determination procedure (Clause 6) uses controlled ignition, sulfuric and hydrofluoric acid digestion, duplicate determinations and muffle‑furnace ignitions with results reported to 0.1 %.
• Sampling & reporting: Sampling follows ISO 15528; test reports must identify product details, reference the standard, list results and methods, note deviations and anomalies, and include test dates.

Practical applications and users

This standard is directly useful for:

• Manufacturers of flux‑calcined kieselguhr for product specification, quality control and batch release.
• Coatings, ink and paint formulators who use kieselguhr as an extender for opacity, rheology and cost control.
• Rubber compounders and plastics processors that require controlled filler properties (surface area, oil absorption).
• Testing laboratories and QC teams ensuring compliance with purchaser or regulatory specifications.
• Procurement and compliance officers specifying supplier acceptance criteria.

Using EN ISO 3262-22:2023 ensures reproducible test results, consistent product grades and clearer supplier/customer communication for applications that rely on flux‑calcined diatomaceous earth.

Related standards

• ISO 3262‑1 (general test methods for extenders)
• ISO 787 series (methods for pigments and extenders)
• ISO 5794‑1 (silica - non‑rubber tests)
• ISO 15528 (sampling)
• ISO 3696 (water for analytical use)

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2023
Nadomešča:
SIST EN ISO 3262-22:2002
Polnila - Specifikacije in preskusne metode - 22. del: Kremenka, kalcinirano topilo
(ISO 3262-22:2023)
Extenders - Specifications and methods of test - Part 22: Flux-calcined kieselguhr (ISO
3262-22:2023)
Füllstoffe - Anforderungen und Prüfverfahren - Teil 22: Kieselgur, fluxcaliniert (ISO 3262
22:2023)
Matières de charge - Spécifications et méthodes d'essai - Partie 22: Kieselguhr calciné
en présence d’un fondant (ISO 3262‑22:2023)
Ta slovenski standard je istoveten z: EN ISO 3262-22:2023
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3262-22
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 3262-22:2001
English Version
Extenders - Specifications and methods of test - Part 22:
Flux-calcined kieselguhr (ISO 3262-22:2023)
Matières de charge - Spécifications et méthodes d'essai Füllstoffe - Anforderungen und Prüfverfahren - Teil 22:
- Partie 22: Kieselguhr calciné en présence d'un Kieselgur, fluxcaliniert (ISO 3262 22:2023)
fondant (ISO 3262-22:2023)
This European Standard was approved by CEN on 29 April 2023.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3262-22:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3262-22:2023) has been prepared by Technical Committee ISO/TC 256
"Pigments, dyestuffs and extenders" in collaboration with Technical Committee CEN/TC 298 “Pigments
and extenders” the secretariat of which is held by DIN.
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 January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
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 3262-22:2001.
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 3262-22:2023 has been approved by CEN as EN ISO 3262-22:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 3262-22
Second edition
2023-06
Extenders — Specifications and
methods of test —
Part 22:
Flux-calcined kieselguhr
Matières de charge — Spécifications et méthodes d’essai —
Partie 22: Kieselguhr flux-calciné
Reference number
ISO 3262-22:2023(E)
ISO 3262-22:2023(E)
© ISO 2023
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 3262-22:2023(E)
Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Requirements and test methods . 2
5  Sampling . 2
6  Determination of silica content . 2
6.1 Reagents . 2
6.2 Apparatus . 3
6.3 Procedure . 3
6.3.1 Number of determinations . 3
6.3.2 Test portion . 3
6.3.3 Determination . 3
6.4 Expression of results . . 3
7  Test report . 4
iii
ISO 3262-22:2023(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 right to be represented on that committee. International
organizations, governmental an
...