Series of diameters specified in the standard for straight seam steel pipes: the nominal diameter of straight seam steel pipes refers to the series of diameters specified in the standards for straight seam steel pipes. For straight seam steel pipes, pipe fittings, valves, etc., the nominal straight seam steel pipe diameter is represented by the series specified in the standard. The components of straight seam steel pipes used for transporting fluid adopt the nominal diameter series.
The nominal diameter of the straight seam steel pipe standard is expressed in inches (in) or millimeters. When the nominal diameter of my country’s straight seam steel pipe standard is 10mm, it is marked as DNIO.
The working pressure of straight seam steel pipe refers to the pressure that pipes, pipe fittings, valves, and other pipeline components bear under normal operating conditions. The design pressure of straight seam steel pipe refers to the pressure that the pipeline is subjected to under severe conditions in combination with the corresponding design temperature during normal operation.
The working temperature of a straight seam steel pipe is the temperature of the pipe under normal operating conditions, and the design temperature of the pipe during normal operation is the set straight seam steel pipe that may withstand the corresponding design pressure.
Straight seam steel pipe welding physical deformation of steel pipe heating: straight seam steel pipe welding physical deformation of steel pipe heating, if a straight seam welded steel welding, can reduce the size of the data to a large extent the physical deformation of straight seam steel pipe. The demand for straight seam steel pipe projects is high, and the first start of outer seam welding is to ensure the penetration of large straight seam welded steel pipes, the appearance of straight seam steel pipe welds, and the continuous linearity of straight seam steel pipe welds. In the case of severe corrosion of steel, the edge should be cleaned strictly, and the shape of the weld seam should be controlled to ensure the perfect weld seam shape. The storage and transportation conditions of the steel plate have an important impact on the welding of steel pipes. Severe corrosion of the steel plate in the open air is inevitable and will have a significant impact on the product.
The steel pipes can also be superimposed, on the other hand, with additional lateral restraint from adjacent steel pipes; secondly also supported by the following, fixed block steel pipe supports. From the above analysis, the static accumulation of the steel pipe under gravity is mainly caused by three forces: the steel pipe support of the upper steel pipe fixing block and the horizontal binding; but during the transportation process, the stress distribution of the steel pipe changes under a large dynamic load. On the one hand, the steel pipe D/t (diameter D of the steel pipe, t steel pipe wall thickness) is relatively large, and the stress of the stacked steel pipes at the bottom of the engine room is relatively complex. The horizontal direction has been affected by the binding of adjacent pipes, and the vertical steel pipes are under the combined effect of self-weight, fixed blocks, and the gravity of the stacked rods, so that the horizontal and vertical alternation of the pipe section may warp and deform. If the steel pipes are shipped with the shorter dimensions lower by mistake, then the requirements for the top and adjacent penstock steel pipes are higher.
Post time: Jul-21-2023