Dear All,
I am a welding engineer working on a spreadsheet to estimate fabrication cost. Whilst the cost of welding alone is 'relatively easy' to estimate (considering duty cycles, labour costs, equipment depreciation etc), I am struggling with the cost of preheating.
I have found formulas in literature to calculate the power required, hence the energy costs. However, the majority of costs associated with preheating is due to labour and equipment (especially for resistance heating).
Does anyone have any suggestions? The estimate needs to be sensible, but not extremely accurate. I would be happy with something better than the current "let's just use the same cost as we assumed for the previous projects"
I am a welding engineer working on a spreadsheet to estimate fabrication cost. Whilst the cost of welding alone is 'relatively easy' to estimate (considering duty cycles, labour costs, equipment depreciation etc), I am struggling with the cost of preheating.
I have found formulas in literature to calculate the power required, hence the energy costs. However, the majority of costs associated with preheating is due to labour and equipment (especially for resistance heating).
Does anyone have any suggestions? The estimate needs to be sensible, but not extremely accurate. I would be happy with something better than the current "let's just use the same cost as we assumed for the previous projects"
