The difference between neck welded steel pipe flanges and neck welded orifice plate flanges

The neck welded steel pipe flange and the neck welded orifice plate flange are two different types of welding neck flanges used for pipeline connections, and their main difference lies in their shape and purpose.

Shape

A neck welded steel pipe flange is a steel circular flange with a pipe neck inside, used to connect the flange to the pipeline. A neck welded orifice flange is a flat flange with holes, usually used to connect pipes or other equipment of different sizes or materials.

Purpose

Neck welded steel pipe flanges are mainly used to connect pipes of the same material, size, and pressure class. They are typically used to connect pipelines or equipment in chemical, petroleum, natural gas, shipbuilding, and other industries. Neck welded orifice flanges can be used to connect pipes or equipment of different materials, sizes, or pressure levels, as they can be connected to various types of pipes and equipment.

Installation method

Neck welded steel pipe flange: First, connect the two ends of the pipeline to the flange separately, and then tighten the flange with bolts. During installation, it is necessary to use gaskets to clamp the flange connection part to ensure that there is no leakage at the connection. This flange is mainly used to connect pipes of the same material, size, and pressure rating.

Neck welded orifice flange: First, the flange needs to be fixed on one side of the pipeline, and then the other side of the pipeline needs to be inserted into the hole in the flange and fixed with bolts. During installation, it is necessary to use gaskets to clamp the flange connection part to ensure that there is no leakage at the connection. This flange can be used to connect pipes or equipment of different materials, sizes, or pressure levels, as they can be connected to various types of pipes and equipment.

Overall, both neck welded steel pipe flanges and neck welded orifice flanges are flanges used for pipeline connections, but their shapes and uses are different. The choice of flange depends on the specific pipeline connection requirements.