The welding elbow

The welding elbow

Welding elbow pipe fittings are mainly used for the connection of pipelines, which need to be used at the bend of the pipeline during the installation process.

The classification method of welding elbow is divided into long radius elbow and short radius elbow according to the radius of curvature of the elbow.Long radius elbows are those with radius of curvature equal to 1.5 times the outside diameter of the pipe, i.e. R=1.5D.A short radius elbow is one whose radius of curvature is equal to the outside diameter of the pipe, i.e. R=D.In the formula, D is the elbow diameter and R is the radius of curvature.The commonly used elbow is 1.5D. If it is not indicated in the contract that it is 1D or 1.5D, then 1.5D should be optimized.China's commonly used implementation standards are GB/T12459-2005, the most GB/13401-2005,GB/T10752-1995.Geometric dimensions include outside diameter, inside diameter and wall thickness.It is also required to control the radius of curvature.For example, if the radius is 1.5D, then the radius of curvature must be within the required tolerance range.Since most of these pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled with a certain Angle and a certain edge. This requirement is also strict. The thickness of the edge, the Angle and the deviation range are specified, and there are many more items than the pipe fittings in terms of geometric size.The surface quality and mechanical properties are basically the same as the pipe.For welding convenience, the steel grade is the same as that of the connected pipe.Fourth, all the pipe fittings should be surface treatment, the inner and outer surface of the oxide sheet by shot peening treatment spray, and then coated with anticorrosive paint.This is not only for export needs, moreover, in order to facilitate transportation to prevent corrosion and oxidation, to do this work.Fifth, is the packaging requirements, for small pipe fittings, such as export, you need to do wooden cases, about 1 cubic meter, the number of elbows in the box is about not more than a ton, the standard allows the set, that is, a small set, but the total weight generally not more than 1 ton.For large pieces to be individually packaged, like 24 "must be individually packaged.The other is the packaging mark, the mark is to indicate the size, steel number, batch number, manufacturer's logo.Steel stamp shall be made on the pipe fittings, and the steel stamp shall be printed according to the requirements and needs of customers.And in the packing list and warranty and other documents.

The company mainly produces pipe fittings: such as elbow, tee, size head, pipe cap and other pipe fittings.The above pipe fittings will be packaged and tested in accordance with customer requirements and customized needs during the export process.This service gets the customer's satisfaction and the next order.