A semiquantitative method for the determination of the amount of free phenols in phenolic mouldings. Hot water extraction of free phenols from a powdered test portion, iodination of the water extract and backtitration of the excess of iodine with standard volumetric thiosulfate solution.
Plastics — Phenol-formaldehyde mouldings — Determination of free ammonia and ammonium compounds — Co...
Specification of a semi-quantitative method. The content of free ammonia in a moulded article is of importance, when corrosion of metal inserts or contamination in contact with the article has to be considered. Distillation of the aqueous extract from a powdered test portion, coloration of the distillate by reaction with Nessler reagent and comparison of the colour with that of standard matching…
(Supersedes CGA 3.8-1972) This standard applies to equipment
fired with natural gas or propane in the liquid or vapour phase
for the purpose of drying farm crops.
Signs and Symbols for the Occupational Environment
Applies to signs for use in the occupational environment. It
describes requirements for the shape and colour of signs and sets
down a classification system, defined so as to assist the user in
determining what signage is needed. The standard also includes
requirements for glyphs which may be used with or without
legends, subject to the limitations of the standard, to describe
a specific…
Hydrometers — Principles of construction and adjustment
Glass hydrometers of constant mass which do not incorporate a thermometer are considered. Basis of scale, reference temperature, surface tension and reference levels for adjustment and reading are specified. In annex A the standard categories of surface tension are tabled, and annex B deals with the adoption of density as preferred basis of scale.
Soaps — Determination of chlorides content — Potentiometric method
The method is carried out as follows: Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid medium, using a silver-silver chloride measurement electrode and a calomel reference electrode.
Mat Reinforcing, Fibrous Glass, for Membrane Waterproofing Systems and
Built-Up Roofing
Scope
1.1 This standard applies to products composed of numerous glass-fiber strands distributed to form a mat of uniform thickness, for use in the membrane system of waterproofing and in built-up roofing.
Components for Use in Asbestos Cement Building Sewer Systems
1. Scope
1.1 This Standard covers asbestos cement (AC) pipe and pipe fittings for
use in building sewer systems.
1.2 This Standard includes requirements for material, workmanship,
dimensions, flexural strength, crushing strength, and joint tightness.
Methods of marking to indicate compliance with this Standard are
included.
1. Scope
1.1 Scope
This Standard outlines limitations for those aggregates most commonly
used in interior plaster, which include perlite, sand (natural and
manufactured), and vermiculite. Other aggregates may be employed provided
tests have demonstrated that they yield plaster of satisfactory quality.
