Textile glass — Determination of stiffness of rovings
Suspension of a test piece of roving, 500 mm long, at its centre over a hook with specified dimensions and measurement of the separation of the two hanging ends of the test specimen at a standard distance of 60 mm below the suspension point. A suitable roving stiffness tester is shown in a figure.
Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of total carbo...
Specifies the treatment of a test portion with an excess of carbonate-free sodium hydoxide solution. Elimination of ammonia by boiling. Precipitation of carbon dioxide by an excess of barium chloride. Neutralization with hydrochloric acid solution using thymolphthalein as indicator. Addition of an excess of standard volumetric hydrochloric solution and back-titration with standard volumetric…
The Standard specifies the characteristics of the oil. The oil must be a clear, mobile liquid with a colour of pale yellow to amber with a slight blue fluorescence and a characteristic odour, recalling that of the flowers of the bitter orange tree. The maximum acid value runs up to 2,0. The permissible ranges for the values of relative density at 20/20 °C, refractive index at 20 °C, solubility in…
The Standard specifies the following characteristics of the oil. Appearance: Clear liquid or crystalline mass. Colour: Colourless to pale yellow, when liquid. Odour: Characteristic, recalling than of anethole. Relative density at 20/20 °C: 0,980 - 0,990. Refractive index at 20 °C: 1,5520 - 1,5590. Optical rotation at 20 °C: Range from - 2 to + 2 . Solubility in 90 % (V/V) ethanol at 20 °C: 1…
Tea — Determination of alkalinity of water-soluble ash
The method consists in titrating of the filtrate from the determination of water-soluble ash, whith standard hydrochloric acid solution, using methyl orange as indicator.
Preferred Metric Dimensions for Flat Metal Products
1. Scope
1.1 This Standard establishes first and second preference series of thicknesses, widths, and lengths for flat metal products. It applies to those products conventionally known as plate, sheet, strip, foil, and ribbon, where the width is substantially greater than the thickness. It does not cover rectangular and square cross-section metal products conventionally known as rod, wire,…
Specifies requirements for the determination of the impact strength. The test consists in breaking a series of unnotched machined cylindrical test pieces resting freely between supports, and measuring the difference between the kinetic energy of the hammer before and after fracture of the test piece. Annex A includes non-standard test pieces, annex B includes notes on coefficients for calculation…
