Atomic hydrogen welding shade is expressed as which range?

Atomic hydrogen welding shade is expressed as which range?

• A. 8-12
• B. 10-14
• C. 12-16
• D. 14-18

Answer: (B)

Shade numbers on a welding filter indicate how much light and radiation the lens blocks, i.e., the filter’s optical density. For arc welding that produces a very bright arc and significant UV radiation, you need a filter that provides strong protection without making visibility impractically dark. Atomic hydrogen welding uses a bright arc, so its protective shade sits in a mid-to-high range. The commonly specified protection for this process is a shade range of 10 to 14, which covers typical welding currents—lighter shades around 10 for moderate current and up to 14 for higher current. Shades like 8-12 would be too light for brighter AH welding, while 12-16 or 14-18 are darker than usually required and can hinder welding control unless the current is very high.

Shade numbers on a welding filter indicate how much light and radiation the lens blocks, i.e., the filter’s optical density. For arc welding that produces a very bright arc and significant UV radiation, you need a filter that provides strong protection without making visibility impractically dark. Atomic hydrogen welding uses a bright arc, so its protective shade sits in a mid-to-high range. The commonly specified protection for this process is a shade range of 10 to 14, which covers typical welding currents—lighter shades around 10 for moderate current and up to 14 for higher current. Shades like 8-12 would be too light for brighter AH welding, while 12-16 or 14-18 are darker than usually required and can hinder welding control unless the current is very high.