Étoffes — Détermination de la résistance au mouillage superficiel (Essai d'arrosage)
La présente Norme internationale spécifie une méthode d'essai d'arrosage pour la détermination de la résistance d'une étoffe, qui peut présenter ou ne pas présenter de résistance à l'eau ou avoir reçu un traitement hydrofuge, au mouillage superficiel par l'eau. Elle n'est pas destinée à apprécier la résistance à la pénétration de la pluie, puisqu'elle ne mesure…
Light olefins for industrial use — Determination of ammonia — Photometric method
Covers a method applicable to products having ammonia contents greater than 0,25 mg/kg. Consists in absorbing the ammonia from a gaseous sample in sulphiric acid medium with the formation of ammonium sulphate and passing a current of nitrogen into the absorption liquid to remove hydrogen sulphide which would interfere. This is followed by formation in an alkaline medium of the indophenol complex…
Paraformaldehyde for industrial use — Methods of test — Determination of aldehyde content — Titrimet...
The method is applicable to solid paraformaldehyde of aldehyde contents in the range 67 % (m/m) to 97 % (m/m). The principle consists in the reaction of aldehyde present in a test portion with neutralized sodium sulphite solution. Titration of the liberated sodium hydroxide with sulphuric acid solution using thymolphthalein as indicator. - This document has also been approved by the IUPAC.
Straight cylindrical involute splines — Metric module, side fit — Generalities, dimensions and inspe...
Provides data and guidance for the design, manufacture and inspection of the involute splines. Limiting dimensions, tolerances and manufacturing errors are defined and tabulated. Linear and angular dimensions are expressed in mm and degrees, respectively.
Metallic and other non-organic coatings — General rules for corrosion tests applicable for storage c...
Gives guidance on methods of corrosion testing of protective metallic, conversion and other non-organic coatings, with or without additive protection, in heated und unheated storage rooms in all microclimates with or without control of climatic parameters. Specimens and articles may be tested separately or in bilk, and with protective wrappings.
