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Forms one part of four which provide a universal means of communication between the various interests involved in the design, manufacture, installation and operation of measurement and control equipment used in the process industries. This part establishes a symbols system for use in depicting the basic functions. The system has been limited to the identification of instrument functions and does…

Ce format PDF contient la Note à l'utilisateur no 2. 1. Objet 1.1 Les présentes exigences s'appliquent aux chaudières à gaz naturel et propane d'assemblage. 1.2 Les exigences de la partie A de la présente norme s'appliquent aux chaudières d'assemblage, ignitubulaires et aquatubulaires, à vapeur et à eau chaude, dont le débit calorifique maximal établi par…

This PDF includes GI #2. 1. Scope 1.1 These requirements apply to natural and propane gas-fired packaged boilers. 1.2 The requirements in Part (A) of this Standard apply to package boilers, fire and water tube, steam and hot water, having manufacturer's maximum input ratings in excess of 400,000 Btuh and up to and including 10,000,000 Btuh. 1.3 Part (B) of the Standard…

Relates to C6 to C13 alcohols. The principle based on esterification of alcohols present in a test portion by means of acetic anhydride, and titration of the excess acetic anhydride with a standard volumetric ethanolic potassium hydroxide solution, in the precence of phenolphtalein as indicator.

The document also specifies the method to be used for the determination of the crystallizing point. Before carrying out the tests, the sample shall be grind to a fine powder and shall be mixed thoroughly. Exposure to moist air may lead to the formation of maleic acid. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

The principle is based on the measurement of colour, by the method specified in ISO 2211, of a test portion in the molten state. The results are expressed in Hazen units. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

The procedure is based on the potentiometric titration of the free acidity in a test portion with a standard volumetric triethylamine solution in anhydrous methyl ethyl ketone (butanone). - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

The principle consists in the dissolution of a test portion in diluted standard volumetric sodium hydroxide solution and titration with standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

The principle consists in burning a test portion and heating in a furnace controlled at (600 30) °C, until all carbonaceous matter has disappeared, to constant mass. The residue may be retained for the determination of iron. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.

The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1390/5). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a…