What precaution should be taken when welding stainless steel?

Welding stainless steel requires careful consideration of the environment and safety protocols. One key precaution involves the recognition of confined spaces. When welding in these areas, there are significant risks due to limited airflow, which can lead to the accumulation of harmful fumes and gases. This can pose a serious health risk to welders. It's essential to ensure proper ventilation or to avoid confined spaces altogether to maintain a safe working environment.

The other options do not accurately reflect necessary precautions for welding stainless steel. For instance, welding can often take place in controlled environments, including indoors, provided safety measures are in place. Wearing gloves is important for overall safety, but it is not a specific requirement tied solely to welding stainless steel. Additionally, the statement about only welding new material is misleading since both new and properly prepared used materials can be welded, provided that the proper procedures are followed.