AWS A5.32M/A5.32 pdf free download

AWS A5.32M/A5.32 pdf free download.Welding Consumables- Gases and Gas Mixtures for Fusion Welding and Allied Processes.
The purpose of this Standard is to classify and designate these gases and gas mixtures in accordance with their chemical properties and metallurgical behavior as the basis for correct selection by the user and to simplify the possible qualifica- tion procedures. The modes of application for gas shielded welding processes include, but are not limited to: manual, semiautomatic, mechanized, and automatic weld methods. Gas purities and mixing tolerances are specified as delivered by the supplier (manufacturer) and not at the point of use. Gases or gas mixtures may be supplied in either liquid or gaseous form, but when used for welding and allied processes, the gases are always used in the gaseous form. Fuel gases, such as acetylene, natural gas, propane, etc., and resonator gases, as used in gas lasers, are not covered by this Standard. Transportation and handling of gases and containers shall be in accordance with local, national, and regional standards and regulations as required. Safety and health issues and concerns are beyond the scope of this standard and, therefore, are not fully addressed herein. Some safety and health information can be found in annex clause A5. Safety and health information is available from other sources, including, but not limited to: Safety and Health Fact Sheets listed in A8.3, ANSI Z49.1 Safety in Welding, Cutting and Allied Processes’, and applicable federal and state regulations. This specification makes use of both the International System of Units (SI) and U.S. Customary Units. The measurements are not exact equivalents; therefore, each system must be used independently of the other without combining in any way when referring to material properties. The specification A.5.32M uses SI Units. The specification with the designation A5.32 uses U.S. Customary Units. The latter are shown within brackets [ ] or in appropriate columns in tables and figures. Standard dimensions based on either system may be used for packaging or both under A5.32M or A5.32 specifications.
4. Properties of gases 4.1 General. Relevant physical and chemical properties of the gases considered in this Standard are given in Table 1. 4.2 Rounding-off procedure For purposes of determining compliance with the requirements of this Standard, the actual test values obtained shall be subjected to the rounding-off rules ASTM E 29, or Rule A in Clause B.3 of ISO 80000-1:2009 (the results are the same). If the measured values are obtained by equipment calibrated in units other than those of this Standard, the measured values shall be converted to the units of this Standard before rounding off. If an average value is to be compared to the requirements of this Standard, rounding off shall be done only after calculating the average. In the case where the testing standard cited in the normative references of this Standard contains instructions for rounding off that conflict with the instructions of this Standard, the rounding-off requirements of the testing standard shall apply. The rounded-off results shall fulfill the requirements of the appropriate table for the classfication under test. 5. Classification and designation 5.1 Classification 5.1.1 General. Gases and gas mixtures shall be classified by the number of this Standard, followed by the symbol for the gas in accordance with Table 2. Note: The classification is based on the reactivity of the gas or gas mixture. The shielding gases and gas mixtures covered by this specification are classified using a system that is independent of U.S. Customary Units and the International System of Units (SI). Classification is according to chemical composition of the shielding gas and gas mixtures as specified in 5.1.2 and5.I.3. Gases and gas mixtures classified under one classification shall not be classified under any other classification in this specification. Individual gases shall meet or exceed the requirements of Table 4.AWS A5.32M/A5.32 pdf download.