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 forces are acting at a point''o'',determine magnitude and direction by using parallelogram law of forces and triangular law of forces

The Diameter Dimension Command You can use the Diameter command to annotate a circle or an arc with a diameter dimension. To achieve this simply start the command, pick a point

Give a generalized definition of factor of safety. Illustrate the factors responsible for Un-certainities in design necessitating a suitable factor of safety. How is ‘factor of saf

for a circle,is the net work necessarily zero? for what kind of system will this be the case?

You need to sketch shear force and bending moment diagrams and estimate maximum bending and shear stresses acting on the beam using your knowledge in beam analysis.  Please note

Specifi c Heat: The specific Heat of a solid or liquid can be usually defined as heat required for raising unit mass through one degree temperature rise. That is,   dQ = m

use of productin drawing in manufacturing technolagy

Di fferentiate between strength of material and engineering mechanics Sol.: Three primary areas of mechanics of solids are statics, dynamics and the strength of materials.

Washing: Station 1 Loading bay START Station 2 Hot Chemical wash Station 3 Running Cold bath Station 4 Hot C

Constructiona l Details of Two Stroke Engine: The basic components are cylinder, piston, piston liners, connecting rod, piston rings, crank pin, crank shaft, counter weight e