Understanding API ICP653 Reading 7-Worksheet-04 Part1

10.4.2.3 Specific welding notes:
a. No welding is allowed when parts to be welded are wet from rain, snow or
ice or when rain or snow is falling, or during high wind conditions (unless
the work is shielded). Caution this is a common practice and should be
avoided.
b. No welding is permitted when the base metal is below 0°F. c. If the base
metal temperature is between 0° and 32°F or the metal "t" is in excess of
1", the base metal within 3" of welding shall be pre-heated to
approximately 140°F.
Charlie Chong/ Fion Zhang