update:

added missing or EN or better qualities:

ISO 528:1983 Refractory products -- Determination of pyrometric cone equivalent (refractoriness)
ISO 2478:1987 Dense shaped refractory products -- Determination of permanent change in dimensions on heating
ISO 5013:1985 Refractory products -- Determination of modulus of rupture at elevated temperatures
ISO 5019-1:1984 Refractory bricks -- Dimensions -- Part 1: Rectangular bricks
ISO 5019-2:1984 Refractory bricks -- Dimensions -- Part 2: Arch bricks
ISO 5019-3:1984 Refractory bricks -- Dimensions -- Part 3: Rectangular checker bricks for regenerative furnaces
ISO 5019-4:1988 Refractory bricks -- Dimensions -- Part 4: Dome bricks for electric arc furnace roofs
ISO 5019-5:1984 Refractory bricks -- Dimensions -- Part 5: Skewbacks
ISO 8656-1:1988 Refractory products -- Sampling of raw materials and unshaped products -- Part 1: Sampling scheme
ISO 8840:1987 Refractory materials -- Determination of bulk density of granular materials (grain density)
ISO 8890:1988 Dense shaped refractory products -- Determination of resistance to sulfuric acid
ISO 10059-1:1992 Dense* shaped refractory products -- Determination of cold compressive strength -- Part 1: Referee test without packing
ISO 10635:1999 Refractory products -- Methods of test for ceramic fibre products
ISO 16349:2015 Refractory materials -- Determination of abrasion resistance at elevated temperature
ISO 21068-3:2008 Chemical analysis of silicon-carbide-containing raw materials and refractory products -- Part 3: Determination of nitrogen* oxygen and metallic and oxidic constituents
ISO 21078-1:2008 Determination of boron (III) oxide in refractory products -- Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics* glass and glazes
ISO 21587-2:2007 Chemical analysis of aluminosilicate refractory products (alternative to the X-ray fluorescence method) -- Part 2: Wet chemical analysis


still missing:

ISO 9205:1988 Refractory bricks for use in rotary kilns -- Hot-face identification marking
ISO 10080:1990 Refractory products -- Classification of dense* shaped acid-resisting products

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