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Welding Consumable Content – For Steel Structures Typical of the Process/ Chemical Industry


While each steel fabrication project is unique and to generalize in the form of a welding consumable content rule of thumb carries with it a greater degree of uncertainty, it is nonetheless sometimes necessary in the absence of either data or time.


Generally for large steel structures such as that of the process/ chemical industry using 2.5% to 3% of welding consumable content per total steel structural weight would normally be sufficient.


For example to calculate the cost (via the weight of) the welding consumable content of an oil and gas jacket, piles and topside with a combined structural steel weight of say 2,500 tonnes, the formula would be as follows:


Welding consumable weight = 2,500 tonnes  x 2.5% = 62.5 tonnes.


An alternate and more refined method would be for example to break the steel work into:


-          Structural, primary

-          Structural, secondary

-          Structural, tertiary

-          Piping, per system


And then take typical sections for each and calculate the welding consumable mass according to the method, joint type, materials thickness and any other relevant variable.


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