GB/T18248 Seamless Steel Pipe-GB/T18248 Seamless Steel Pipe for Gas Cylinders
Product material: 37Mn, 30CrMo 35CrMo.34CrMo4 Specifications: Outer diameter: 57mm~720mm, wall thickness 3mm~120mm
Production method: hot rolling/cold drawing/hot expansion
The product should comply with the requirements of TSGD7002-2006 "Type Test Rules for Pressure Pipe Components".
Delivery weight Seamless steel pipes are delivered according to actual weight. The supply and demand parties negotiate and indicate it in the contract, or delivery can be based on theoretical weight.
Calculation of theoretical weight of seamless steel pipe
The theoretical weight of steel pipes is calculated according to the provisions of GB/T17395 (the density of steel is 7.85 kg/dm"). For steel pipes delivered according to the outer diameter and minimum wall thickness, the average thickness should be used to calculate the theoretical weight, and the average wall thickness is based on The wall thickness and its allowable deviation are calculated as the average value of the better value and the minimum value of the wall thickness. The allowable deviation of the weight of the non-front steel pipe is based on the requirements of the buyer, negotiated by both the supplier and the buyer, and noted in the contract, the actual weight of the delivered steel pipe and The partial maintenance of theoretical weight should comply with the following regulations: a) single steel pipe: 10%; b) steel pipes with a minimum size of 10t per batch: 7.5%.
