Final answer:
According to CSA Standard W59, the minimum preheat around a weld on a 44 mm thick plate must be maintained at a distance of 75 mm.
Step-by-step explanation:
According to CSA Standard W59, the minimum preheat for a 44mm thick plate must be maintained at a distance of 75 mm from the weld. This requirement ensures that the heat-affected zone remains at a temperature sufficient to avoid problems such as cold cracking. The preheat temperature minimizes the temperature difference between the welded material and the surrounding base material, which can lead to improved metallurgical and mechanical properties at the joint.