Three wrongs do not make a right.
If the customer said I want welding coveralls and the clerk sold him coveralls not for welding, the clerk made a mistake. If he did not know how to meet the customer's requirements, then the clerk should have asked. I think the clerk probably bears some blame. Exactly how much, I don't know what the OP told the clerk to start with. It could be a lot of the blame, but I was not there.
The instructor should have been real clear on what protective clothing was required. In a proper welding school, there is some class time before you fire up the welding equipment. It is not unusual for the instructor to provide a list of stores and what to get at that store as far as equipment goes. Was the OP awake during this part? I don't know. As a minimum the instructor should have done a safety inspection before firing up the equipment. So even if the instructor did all the preliminary classwork stuff and made suggestions on what to buy, the instructor still bears some responsibility for not properly inspecting. A good welding school should have procedures to handle that. Did the instructor follow those procedures?
The OP bears some responsibility. It is the OP's safety on the line. Before yelling "Make it hot" or firing up the machine it is important to know what the risks are and that you have done something about those risks.
I think there is plenty of blame to go around. I remember when a company that worked for us got their welders flame-resistant coveralls to weld in. They were treated so they would not burst into flame, but they would melt. A pair of blue jeans provided better protection than those coveralls.
Nomex is what they got that melted. Nomex is good for working in an area where fire is a risk, like a refinery, but Nomex is not suitable for welding unless it has changed a lot in the recent past. I am retired and no longer totally up to date on all this. But it has not been that long.
If the customer said I want welding coveralls and the clerk sold him coveralls not for welding, the clerk made a mistake. If he did not know how to meet the customer's requirements, then the clerk should have asked. I think the clerk probably bears some blame. Exactly how much, I don't know what the OP told the clerk to start with. It could be a lot of the blame, but I was not there.
The instructor should have been real clear on what protective clothing was required. In a proper welding school, there is some class time before you fire up the welding equipment. It is not unusual for the instructor to provide a list of stores and what to get at that store as far as equipment goes. Was the OP awake during this part? I don't know. As a minimum the instructor should have done a safety inspection before firing up the equipment. So even if the instructor did all the preliminary classwork stuff and made suggestions on what to buy, the instructor still bears some responsibility for not properly inspecting. A good welding school should have procedures to handle that. Did the instructor follow those procedures?
The OP bears some responsibility. It is the OP's safety on the line. Before yelling "Make it hot" or firing up the machine it is important to know what the risks are and that you have done something about those risks.
I think there is plenty of blame to go around. I remember when a company that worked for us got their welders flame-resistant coveralls to weld in. They were treated so they would not burst into flame, but they would melt. A pair of blue jeans provided better protection than those coveralls.
Nomex is what they got that melted. Nomex is good for working in an area where fire is a risk, like a refinery, but Nomex is not suitable for welding unless it has changed a lot in the recent past. I am retired and no longer totally up to date on all this. But it has not been that long.