Rechercher

The resistance of anodic oxide coatings to absorption of dyes may give information on the quality of sealing. The method is applicable to anodic oxide coatings to be subjected to weathering or to aggressive environments and, in all cases, where resistance to staining is important. The dye spot test is not applicable to certain coatings.

Describes a method based on prior conversion of the sulphur compounds in a test portion to sulphate, if required, and reduction of the sulphate ions ti hydrogen sulphide by a mixture of hydriodic and phosphinic acids in the presence of hydrochloric acid. The hydrogen sulphide is entrained in a current of nitrogen and absorbed in a solution of sodium hydroxide in aqueous acetone, followed by…

Specifies methods for sampling and preparing samples prior to testing of binder pitch used in the manufacture of electrodes for the electrolytic production of aluminium. These methods are applicable to grades of pitch in liquid or solid form, the latter having softening points higher than 30 °C in bulk or in a number of containers making up one batch at sites of manufacture, storage or delivery.

Scope 1.1 This standard describes the recommended procedures to be employed in applying 37-GP-54M flexible polyvinyl chloride membrane for roofing on new construction and for reroofing. 1.2 Three methods of membrane installation are covered by this standard, namely, loose laid, fully adhered and mechanically fixed. 1.3 Wind uplift requirements must be established inthe job…

The method consists in heating a test portion until all organic matter is decomposed and a clear solution is obtained, either with sulphuric acid and nitric acid and in certain cases with hydrogen peroxide, or with sulphuric acid and nitric acid with the addition of perchloric acid.

Specifies the controls which shall be maintained over the exposure conditions during and following the irradiation of insulating materials with ionizing radiation prior to the determination of radiation-induced changes in physical or chemical properties. A number of potentially significant irradiation conditions are discussed and various parameters which can influence the radiation-induced…

1. Scope 1.1 This Standard covers hollow building and facing brick made from clay, shale, fireclay, or mixtures thereof and burned for use in brick masonry. 1.2 This Standard excludes ceramic or other glazed brick. Brick to be treated with water-repellent materials must qualify under this Standard prior to such application. Note: For information regarding workmanship, see Appendix A.

1.1 Scope 1.1.1 This Standard describes test procedures and equipment which will permit accurate and reproducible determination of the particulate mass flows in enclosed gas streams. It is intended for use both before and after gas cleaning equipment (performance testing) or prior to emission of the gas stream into t he atmosphere. Note. It is recommended that the testing procedures in…

Gives formulae which allow analytical data relating to coal and coke to be expressed on the various different bases in common use. Consideration is given to corrections that may be applied to certain determind values for coal prior ti their calculation to other bases. In a table formulae for calculation of results to different bases are given.