Sodium and potassium silicates for industrial use — Determination of dynamic viscosity
The determination is carried out by using a rotary viscometer. It is applicable to liquid products, the dynamic viscosity of which lies between 10 and 80000 mN.s/m2. The principle consists in the determination at a temperature of (20 +- 0,2) °C by measuring the couple required to overcome the resistance exercised by the viscous liquid on an immersed element rotating within it at a constant…
Applies to insulated conductors used in industrial installations and the equipment which forms part of them. Not applicable to insulated conductors constituting the terminals of electrical apparatus.
Test methods for batch furnaces with metallic heating resistors
Applies to industrial furnaces heated indirectly with metallic heating elements in which the internal atmosphere is composed of air not intentionally modified. Standardizes testing conditions and methods in order to determine the essential parameters and technical data of batch chamber, bell, elevator, shaft and carriage furnaces, either with or without forced air circulation, as well as of…
Test methods for induction furnaces with submerged channels
Standardizes test methods to determine the essential parameters and technical characteristics of electro-heat installations comprising industrial induction channel furnaces for melting, holding and super-heating.
General test conditions for industrial electro-heating equipment
Applies to all industrial electro-heating such as resistance, electrode, arc, dielectric and infra-red furnaces. It states the general test conditions as the basic measuring methods applicable to all industrial electro-heating equipment.
Nitric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric me...
The method is applicable to the determination of iron contents greater than 0,0001 % (m/m). The principle consists in evaporation of a test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of iron(II)-2,2' -dipyridyl complex in ammonium acetate medium. Photometric measurement of the coloured complex at a wavelength…
