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What is submerged arc welding?
Sub arc welding is a process in which the welding actually occurs while submerged under a layer of flux. Not only does this prevent oxygen from entering the weld and thus porosity, but it also keeps the dangerous arc from sputtering and spattering from the weld.
Difference between ERW and SAW welding?
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
What should be done to prevent a person from falling from height while working on radial drilling machine or while welding at height by sitting on shell and welding the nozzle the height around 4 mtr?
4000ft
Does lacquer coating on tinplate affect welding?
Yes. However, there are paints designed to be compatible with welding as they are designed to protect the surface of the plate from corrosion while in storage. In every code or specification, it is specifically stated that welding should be done on clean metal. Welding over paint is discouraged.
What type of safety protection do you need for standard welding equipment?
"While using welding equipment, you should always wear safety googles and protective gloves." Make sure you have on a welding jacket and long pants when you're using welding equipment. Those sparks can be very dangerous.
What would you do when you see a fellow welder fell unconscious while welding in a confined space?
Should rescue, apply emergency Procedure and call an ambulance.
Is it okay to use contact lens while welding?
you will be ok if you waer a welding mask
What is the difference between WPS and PQR?
WPS is welding procedure specification while PQR is procedure qualification records is all about welding and denotes design when it comes to WPS and Mechanical testing of the design when it comes to PQR. WPS is the design of welding joint, process of welding, welding position, steel shape and material symmetry, speed of welding, welding electrodes and filler and many more welding parameters while PQR is a complimentary to WPS. PQR will be the one to be tested mechanically and will finally validate if the WPS viable design of welding.
When performing overhead welding what additional safety equipment should be worn in order to protect the legs and feet from falling molten metal?
When welding one should always wear certain clothing. Leather boots (steel toe desirable), work pants (such as jeans) that cover the top of the boots, heavy cotton long sleeve shirt, welding beanie, gloves, and safety glasses. In most instances these items will protect you from sparks and weld spatter whether you are welding on a flat, vertical or overhead surface. A leather jacket can be worn to protect your shoulders and arms. Molten metal should not be falling if you are welding correctly. If you are sitting, while welding, a leather apron should be used.
Why is welding used?
When two pieces of metal are joined by welding they become one as if they were made that way. Welding replaced riveting and reduced the amount of metal used while producing a stronger joint.
Is mig welding a forge welding?
No, Forge welding is the simplest form of welding where two metals are heated to a state than can be forced to meld into each-other such as hammering or by other mechanical means such as a press. MIG Welding is short for Gas Metal Arc Welding (GMAW). This is a process which uses electricity to melt the parent metal and the electrode (wire) while shielded by a inert gas to keep contamination's (our atmosphere (aka air)) out of the weld puddle. Forge welding uses brute force and heat to join metals while MIG welding uses electricity and a shielding gas.
What is the purpose of a filler rod in welding?
while doing the welding ,the weld metal should be deposit in the weld pool of parent material and electrode.In some type of welding like TIG ,the electode is not consumable ,it is used to create arc betwenn the electode and the parent material.In such cases,the filler metal or wire is used to join the parent material
