Calculation formula of steel pipe weight: (outside diameter-wall thickness) × wall thickness mm×0.02466× length m.
The theoretical weight of steel is calculated according to the nominal size and density of steel (called specific gravity in the past), which is called theoretical weight. This is directly related to the length, cross-sectional area and allowable deviation of steel. Due to the allowable deviation of steel in the manufacturing process, the theoretical weight calculated by the formula is different from the actual weight, so it is only used as a reference for estimation.
Preventive measures for steel products
1. Always pay attention to steel price information. Steel prices often change. Only by paying attention to the steel price dynamics can the procurement cost be reasonably reduced. According to the urgent demand for steel, choose spot or futures, usually the futures price is cheaper than the spot price.
2. When selecting suppliers, factors such as delivery time, settlement cycle, price, supplier reputation, etc. should be considered. Some prices are low, but there is no account period, or the delivery time is long; Some prices are high, but the delivery time is short, or there is an account period. Based on reality and comprehensive consideration, it is best to choose suppliers with their own logistics system.
3. Weight calculation. There are two methods to calculate the weight of steel: theoretical weight calculation and actual weighing. Purchasing personnel should master the calculation method, and the weight deviation should not exceed 5%.