Scope
A82.4
1.1 This Standard covers structural clay load-bearing wall tile made from surface clay, shale, fire clay, or mixtures thereof. Two grades of tile are covered, as follows:
Grade LB X - Suitable for general use in masonry construction and adapted for use in masonry exposed to weathering, provided they are burned to the normal maturity of the clay. They may also be…
Grey iron pipes, special castings and grey iron parts for pressure main lines
Specifies the properties of the pipes, special castings and parts manufactured by any one of the following processes: centrifugal casting in metal or sand moulds; vertical casting in sand moulds. Applies to products with sockets, spigots or flanges defined by this standard. It does not apply to the down pipes and their specials used in the building industry.
Caseins — Determination of free acidity (Reference method)
Covers both caseins obtained by acid precipitation or lactic fermentation and rennet caseins. The principle of determination is based on the aqueous extraction of a test portion at 60 degrees centigrade, filtration and titration of the filtrate with a standard volumetric sodium hydroxide solution using phenophthalein as indicator.
Caseins and caseinates — Determination of protein content (Reference method)
Does not apply to caseins and caseinates containing ammonium caseinate or other ammonium compounds, or other nitrogenous nonprotein compounds. The principle of determination consists in digesting a test portion with a mixture of potassium sulphate and sulphuric acid, in the presence of copper(II) sulphate as catalyst, to convert organic nitrogen into ammoniacal nitrogen, distilling and absorbing…
