These requirements cover the design and construction of Type B
(round or oval) and Type BW Gas Vents. Type B Gas Vents are
intended for the venting of flue gases, having temperatures not
exceeding 470 degrees F, from certified gas-fired appliances with
draft hoods or diverters. Type BW Gas Vents are intended for the
venting of flue gases from gas-fired recessed heaters and the
maximum input…
Contains general physical and chemical methods of testing
textiles, for conformance with the standards of the Canadian
Government Specifications Board. It is intended to provide a
uniform basis for testing procedures and thus to eliminate
divergence in numerical results arising from variations in the
methods used.
This PDF includes Amd #1-#3.
1. Scope
1.1 This Standard applies to the preparation and reproduction of building drawings. It includes recommendations for a general classification of types of drawings and establishes a general context for detailed recommendations on drawing-office practice.
1. Scope
1.1 This standard applies to two types of gasoline suitable for use in automotive and spark ignition engines operating under all climate conditions.
Sodium carbonate for industrial use — Determination of sulphur compounds content — Method by reducti...
Applicable to products having a S compounds content, expressed as sulphate, of equal to or more than 5 mg/kg. Bases of progressive neutralization, with evolution of carbon dioxide, by adding slowly a mixture of hydriodic acid and hypophosphoruos acid. Reduction of the compounds to hydrogen sulphide by heating. Distilation of the hydrogen sulfide, entrainment in a flow of oxygen-free nitrogen and…
Sulphuric acid and oleum for industrial use — Determination of total nitrogen content — Titrimetric ...
The method is applicable to products having a total nitrogen content equal to or greater than 0.05 % (m/m). The principle consists in the conversion of the nitrogen present in a test portion to ammonia by means of nascent hydrogen. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution, and back-titration with a standard volumetric sodium hydroxide…
Nitric acid for industrial use — Determination of nitrous compounds — Titrimetric method
Two cases are considered: content of nitrous compounds, expressed as HNO2, equal to or greater than 0,01 % (m/m) and content of nitrous compounds, expressed as HNO2, less than 0,01 % (m/m). The principle consists in oxidatiuon of the compounds present in a test portion by an excess of standard volumetric potassium permanganate solution. Addition of an excess of a standard volumetric iron(II)…
Urea for industrial use — Determination of nitrogen content — Titrimetric method after distillation
The procedure is based on the catalytic conversion of nitrogen present in a test portion to ammonia by heating in concentrated sulphuric acid solution. Distillation and absorption of the ammonia in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of an indicator. - Replaces ISO Recommendation R 1592-1970.
Urea for industrial use — Determination of alkalinity — Titrimetric method
The principle consists in titration of the alkalinity of a test portion with a standard volumetric hydrochloric acid solution in the presence of an indicator. - Replaces ISO Recommendation R 1593-1970.
Bases for the design of structures — Deformations of buildings at the serviceability limit states
Establishes the basic principles that should be adopted when setting up national standards, regulations and recommendations for the deformation of buildings at the limit states of serviceability. Refers to the deformations at the serviceability limit states of buildings such as dwellings, offices, public buildings, and factories. Does not refer to the deformations of bridges, roads, masts,…
