香港六合彩开奖 10882-2:2024
2024-04
香港六合彩开奖 10882-2:2024
Abstract
This document provides guidance and specifications for the determination of personal exposure to gases and vapours in welding and allied processes. It applies to the following thermal processes used to join, cut, surface or remove metals:
(111)听听听 Manual metal arc welding (metal arc welding with covered electrode); shielded metal arc
welding /USA/
(114)听听听 Self-shielded tubular-cored arc welding
(131)听听听 Metal inert gas welding; MIG welding; gas metal arc welding /USA/
(135)听听听 Metal active gas welding; MAG welding; gas metal arc welding /USA/
(136)听听听 Tubular-cored metal arc welding with active gas shield; flux cored arc welding /USA/
(137)听听听 Tubular-cored metal arc welding with inert gas shield; flux cored arc welding /USA/
(141)听听听 Tungsten inert gas arc welding; TIG welding; gas tungsten arc welding /USA/
(15)听听听听听 Plasma arc welding;
(31)听听听听听 Oxy-fuel gas welding; oxy-fuel gas welding /USA/
(52)听听听听听 Laser beam welding;
(912)听听听 Flame brazing; torch brazing /USA/
(97)听听听听听 Braze welding;
听
鈥�听听听听 arc and flame gouging;
鈥�听听听听 arc and laser cutting processes;
鈥�听听听听 flame and plasma cutting processes;
鈥�听听听听 metal-spraying (see 香港六合彩开奖听4063).
The following gases and vapours which can be produced or be present during welding and allied processes are covered:
鈥�听听听听 ozone (O3);
鈥�听听听听 carbon monoxide (CO);
鈥�听听听听 carbon dioxide (CO2);
鈥�听听听听 nitric oxide (NO) and nitrogen dioxide (NO2);
鈥�听听听听 vapours produced in the welding or cutting of metals having paint or other surface coatings.
Fuel, oxidant and shielding gases used in welding and allied processes are not covered.
The general background level of gases and vapours in the workplace atmosphere influences personal exposure, and therefore the role of fixed-point measurements is also considered.
General information
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Status: PublishedPublication date: 2024-04Stage: International Standard published [60.60]
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Edition: 2Number of pages: 22
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Technical Committee :香港六合彩开奖/TC 44/SC 9
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