Standardization of raw materials and products of the refractories industry and their properties.

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Published ISO standards *


ISO standards under development *

Participating members
Observing members

* number includes updates

Reference Title Type
ISO/TC 33/WG 17   Chemical analysis Working group
ISO/TC 33/WG 25   Refractory test piece preparation – Gunning techniques Working group
ISO/TC 33/WG 27   Test methods for refractory mortars Working group
ISO/TC 33/WG 31   Phase quantitative analysis of residual quartz in silica bricks Working group
ISO/TC 33/WG 32   Test methods for dense shaped refractories Working group
Liaison Committees to ISO/TC 33

The committees below can access the documents of ISO/TC 33:

Reference Title ISO/IEC
ISO/TC 24/SC 8 Test sieves, sieving and industrial screens ISO
ISO/TC 163/SC 1 Test and measurement methods ISO
ISO/TC 206 Fine ceramics ISO
ISO/TC 345 Specialty metals and minerals ISO


Liaison Committees from ISO/TC 33

ISO/TC 33 can access the documents of the committees below:

Reference Title ISO/IEC
ISO/TC 24 Particle characterization including sieving ISO
ISO/TC 24/SC 8 Test sieves, sieving and industrial screens ISO
ISO/TC 71/SC 1 Test methods for concrete ISO
ISO/TC 146/SC 2 Workplace atmospheres ISO
ISO/TC 206 Fine ceramics ISO


Organizations in liaison (Category A and B)
Acronym Title Category
PRE European Refractories Producers Federation A
WRA World Refractories Association A
EC - European Commission European Commission B
UNESCAP United Nations Economic and Social Commission for Asia and the Pacific B
WCO World Customs Organization B

Date Month Location TC/SC Note
16-17 September 2024 Höhr-Grenzhausen (Germany) ISO/TC 33  

* Information definite but meeting not yet formally convened
** Provisional

ISO/TC 33 - Secretariat

BSI [United Kingdom]

British Standards Institution
389 Chiswick High Road
London W4 4AL
United Kingdom

Tel: +44 208 996 90 00
Fax: +44 208 996 74 00