Rechercher

Specifies the heating of a test portion in an oven at 80 0C and the determination of the resulting difference in mass by weighing.

Based on dissolution of a test sample in water, distillation of the ammonia after displacement by an alkali solution. Absorption in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.

Specifies the dimensions of the stillages in direct contact with the hand-operated elevating trucks: free height, minimum free width.

La présente Norme Internationale fixe les termes et les définitions des parties principales d'un système d'étirage pour matériel de filature. Le texte est complété par des illustrations appropriées. NOTE -- En supplément aux termes donnés dans les trois langues officielles de l'ISO (anglais, français, russe), la présente Norme Internationale donne les termes équivalents en langue…

Relates to measurement at 20 0C of a solution. Preparation of a 10 g/l solution. Uses a pH meter fitted with a glass measuring electrode and a calomel reference electrode. The calibration of the pH meter is carried out at (20 1) 0C using buffer solutions; sensitivity 0,05 pH units.

Specifies the quality requirements for plain end electric resistance and induction-welded tubes. Does not cover casing, tubing, drill pipe and linepipe for use by the oil and natural gas industries, and tubes for the transport of gas, water and sewage.

Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl…