The requirements deal with four series of conial ground joints. The conicity, the great diameter and the length of the ground joint including the tolerances are specified and tabled. In addition the surface finish and the peak-to-valley height are specified. In annex A a system of gauging for the diameters and lengths of these joints are given, in annex B a method of testing the leakage including…
Road vehicles — Measurement of impact velocity in collision tests
Specifies the accuracy of measurement of the impact velocity. Describes in the annex some typical methods suitable for the measurement. These methods are intended to facilitate the comparison of data obtained in similar tests by different laboratories. Other methods may be used provided they meet the requirements of 2.1 and 2.2.
Sodium perborates for industrial use — Determination of rate of solution — Conductivity method
Gives a conductive method for determining the rate of solution. Describes the principles of the procedure by dissolution of an agreed test portion in water at an agreed temperature, with controlled agitation. Measurement of the conductivity of the solution, at certain intervals, of the final conductivity (when the sample is completely dissolved) and calculation of the ratio of conductivities to…
Potassium chloride for industrial use — Determination of potassium content — Flame emission spectrop...
Is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Acidification to pH 1 after suitable dilution, and atomization of the resultant solution in the burner of a flame spectrophotometer. Measurement of the intensity of the 766 nm ray, compared with the…
Potassium chloride for industrial use — Determination of potassium content — Potassium tetraphenylbo...
The method is applicable to products having a minimum KCL content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the laboratory sample, previously ground and sifted. Addition of formaldehyde solution to transform any ammonium ions present into hexamethylenetetramine, and of ethylenedinitrilotetraacetic acid, disodium salt, to complex any extraneous cations…
Potassium chloride for industrial use — Determination of potassium content — Sodium tetraphenylborat...
The method is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the previously ground and sifted laboratory sample and elimination of many ammonium ions present. Precipitation of the potassium, in a slightly acid medium, by an excess of an standard volumetric sodium tetraphenylborate solution. Filtration and…
Three types of crucibels are specified: Type 1, low form, type 2 medium form and type 3 tall form bases an a height/diameter ratio of 0,63; 0,8 and 1,25 resp. Further two types of lid are described: type D, a lid of slightly domed shape and typ R, a recessed lid. Material and construction are specified, shape and dimensions are shown in drawings and in a table.
Porcelain laboratory apparatus — Requirements and methods of test
The requirements specify the quality of the material. The different methods of test are specified. They concern the porosity and imperfections of glaze, the resistance to heat and sudden change in temperature, the resistance of glaze to high temperature, to acid and to alkali and the constancy of mass on ignition.
A system of color coding is specified for one-mark pipettes for identification of nominal capacities, and for graduated pipettes for identification of nominal capacities and unit of subdivision. The color code bands for the different capacities are tabled and the method of marking is specified. Suitable requirements and test methods for the durability of the colours are intended to be considered…