Safety in tig welding-gaseous and metal fumes hazards, Mechanical Engineering

SAFETY IN TIG WELDING-Gaseous and Metal Fumes Hazards

The major toxic gases associated in TIG welding are ozone, nitrogen dioxide and phosgene gas. Metal fumes are also produced during welding due to the vapourisation of alloying elements. Particular care is required about those elements producing toxic fumes. The ultraviolet rays emitted by the welding arc acts on the oxygen of the surrounding atmosphere to produce ozone. The inert gases used in TIG welding, though are not toxic in nature, can cause suffocation if accumulated in the breathing zone of the welding personnel.

The toxic gas phosgene could be produced if chlorinated hydrocarbon cleaning agents, such as trichloroethylene, perchloroethylene and carbon tetrachloride are present near the welding arc. Hence these cleaning agents should not be used to clean the work piece or filler rod.

A good ventilation in the welding area is required so that the concentration of these gases and fumes in the breathing zone of the welder remains well within the safe limit. If natural ventilation is not adequate, or the welding area is a confined area or if toxic metal fumes are produced, artificial ventilation systems like fume extractor should be provided.

Posted Date: 9/17/2012 12:30:24 AM | Location : United States







Related Discussions:- Safety in tig welding-gaseous and metal fumes hazards, Assignment Help, Ask Question on Safety in tig welding-gaseous and metal fumes hazards, Get Answer, Expert's Help, Safety in tig welding-gaseous and metal fumes hazards Discussions

Write discussion on Safety in tig welding-gaseous and metal fumes hazards
Your posts are moderated
Related Questions
TWO WHEELER INDUSTRY GROWTH:  In world represents one of the largest two wheeler markets in the world with an estimated size of 5.4 million units a year. Two wheelers are used ext

Welding Head Submerged arc welding head consists of the wire spool, wire feed system, flux delivery hopper and electrical contact nozzle. The electrode wire is unwound from the s

programming of diesel cycle with a suitable example


IMPO R T AN T TERMS: Fi r e Box: Place where fuel is burnt. Grat e : The fuel is burnt on this. Baffles : Plates are used for directing the flow of flue gass


Example of Shear force and bending moment diagram: Q: Draw the Shear Force and bending moment diagram for the simply supported beam loaded as shown in the figure given belo

Impact Factor on Vessel rigging analysis? Unless otherwise specified by the user, a minimum impact factor of 1.5 shall be applied to the lift weight for designing the lifting d

Given:  A brittle material has an ultimate tensile strength of 300 MPa and an ultimate compressive strength of  -1000MPa.  Assume that failure can be represented by the Modified

MANDATORY CHECKS DURING THE FIRST SIX SERVICES Various steps in servicing of motorcycle are given below in a tabular form. 2.3.1 First Service and Second Ser