As a "language", these symbols are the most precise means for designers and detailers to place welding, brazing, and nondestructive examination information on drawings AND the most mistake-free means for welding personnel to adhere to original plans.
Section IX of the ASME Boiler and Pressure Vessel Code relates to the qualification of welders, welding operators, brazers, and brazing operators and the procedures employed in welding of brazing in accordance with the ASME Boiler and Pressure Vessel Code and the ASME B31 Code for Pressure Piping. Section IX establishes the basic criteria for welding and brazing which are observed in the preparation of welding and brazing requirements that affect procedure and performance.
Each type of protective eyewear is designed to protect against
specific hazards. Employers can identify the specific workplace
hazards that threaten employees’ eyes and faces by completing a
hazard assessment as outlined in the earlier section.
The intense light associated with welding operations can cause
serious and sometimes permanent eye damage if operators do not
wear proper eye protection.