How to choose the way to weigh the steel pipe

The weight of the steel pipe is the most important parameter in the trade, which determines the steel trade fair and just. In general, there are two ways to weigh the steel pipe: the theoretical weight and weighing weight. Theoretical weight of steel is through the theoretical data (actual measured pipe outside diameter, wall thickness and length) and calculate the weight by a mathematical formula, the formula is: = weight per meter of pipe (OD - Wall Thickness) * wall thickness * 0.02466, the unit value is KG; weighing platform weight is hanging pounds or so on the actual weighed weighing tool steel weight. But in the steel industry, for different steel tend to have their own "hidden rules."

Whether seamless steel pipe, straight seam steel pipe or forged steel pipe, their theoretical weight formula is :(OD - wall thickness ) * wall thickness * 0.02466 = KG per meter of pipe. Generally speaking, this theoretical approach is a little less than the actual weight of the seamless steel pipe, is approximately equal to the actual weight of the forged steel pipe, but a little greater than the actual weight of lsaw steel pipe, ssaw steel pipe or erw steel pipe. In view of this, the seller will take a different approach to weight in the actual process. Straight seam steel pipe is generally taken as the theoretical weight mode, seamless generally uses the weighing weight way. For which way to choose, we can find the cause in the steel manufacturing process.

Longitudinal steel pipe is made with open flat plate or roll, and the actual thickness of the plate or a plate generally have a lower differential, about 0.25mm-0.5mm less than the theoretical thickness, so the weight of the theoretical weight way is to be greater than weighting way; while for the actual thickness of the seamless steel pipe is generally poor, the small thin-walled seamless steel pipe, seamless steel pipe, 20MM thick seamless steel pipe above it on the poor big, can reach 1-2MM, if 40MM or 50MM thick, seamless steel pipe, seamless steel pipe wall thickness can be the difference between some manufacturers to 3-5MM, and the next is almost no difference, so as to ensure that only weigh the seller does not lose tons. Same as for forging steel, because of its very high precision product processing, diameter and wall thickness fairly standard, so conducive to the theoretical formula worked out important and weighing weight.