Anhydrous ammonia for industrial use — Evaluation of residue on evaporation — Gravimetric method
Applicable to products having a residue of equal to or more than 0.02 % (m/m). For products obtained in modern plants this evaluation is not usually required. Indicates to the risk in handling with this product. Analysis by evaporation, at ambient temperature, of a test portion and weighing of the residue. Titration of the ammonia contained in the residue with standard volumetric sulphuric acid…
Véhicules routiers — Dimensions des automobiles et véhicules tractés — Dénominations et définitions
La présente Norme internationale définit les termes intéressant les dimensions des automobiles et véhicules tractés. Elle ne traite pas des méthodes de mesurage, des unités employées pour exprimer les résultats, ni de la précision à obtenir ou de l'ordre de grandeur des dimensions définies.
NOTE -- D'autres termes, définitions et symboles sont donnés dans les Normes internationales…
Industrial-process control valves. Part 2: Flow capacity. Section One: Sizing equations for incompre...
Deals with a general sizing equation for incompressible fluid flow under installed conditions. Factors are introduced which permit accurate sizing when choked conditions exist due to either cavitation or flashing. Procedures and factors are incorporated to handle installations where the valve is installed between fittings such as reducers, expanders, etc. A Reynolds number factor allows for…
Analogue signals for process control systems. Part 2: Direct voltage signals
Applicable to analogue direct voltage signals used in industrial process measurement and control systems. lt specifies ranges of analogue direct voltage signals and the signal common; it also deals with ripple content. The analogue direct voltage signal, unlike the analogue direct current signal specified in IEC 60381-1, is not intended for transmission over long distances. This standard does not…
Phosphoric acid for industrial use — Guide to sampling techniques
Contains guides concerning the procedure to be followed and the precautions to be observed for the taking, preparation and storage of samples with the view of assess their quality. Deals with the means of delivery, containers for taking samples, technical means for mixing and heating systems. Details the sampling of thermal-process and wet-process acids from large containers and mobile tanks and…
Nitric acid for industrial use — Determination of chloride ions content — Potentiometric method
Applicable to products having chloride contents equal or more than 0,0002 % (m/m). Potentiometric titration of the ions with silver nitrate solution in a nitric acid acetone-water medium using a silver measurement electrode and a calomel reference electrode.
Ammonium sulphate for industrial use — Determination of chloride ions content — Potentiometric metho...
Applicable to products having chloride ion contents of equal to or more than 0.0005 % (m/m). Potentiometric titration of the ions with silver nitrate solution in a nitric acid-acetone-water medium, using a silver measurement electrode and a calomel referende electrode.
Ammonium nitrate for industrial use — Determination of chloride ions content — Potentiometric method
Applicable to products having chloride contents equal or more than 0.0002 % (m/m). Potentiometric titration of the ions with silver nitrate solution in a nitric acid-acetone-water medium using a silver measurement electrode and a colomel reference electrode.
Sodium sulphate for industrial use — Determination of sodium sulphate content — Gravimetric method
Applicable to products in which not all impurities are known or determined. The methods specified in ISO 3237 cannot be applied. The principle consists in dissolution of a test portion, removal of insoluble matter, iron, aluminium and calcium from the solution and evaporation to dryness in the presence of sulphuric acid. Heating and weighing of the total amount. Calculation of the sodium sulphate…
