PL flanges are usually used in pipelines to act as a link. The conveyed medium has a certain pressure and flow rate. As a PL flange manufacturer, large-diameter flanges of various specifications and materials can be produced according to customer needs.

　　Our PL flange manufacturers generally believe that PL flange refers to the diameter above DN450. Butt welding flange is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature. It is also used to transport expensive, Flammable and explosive media pipelines.

　　What are the differences between PL flanges

　　1. The scope of application of PL flanges is different: flat welded steel flanges are suitable for carbon steel pipeline connections with a nominal pressure not exceeding 2.5MPa. The sealing surface of the PL flange can be made into three types: smooth, concave-convex and tongue-and-groove. The smooth pl flange has the largest application amount, and is mostly used in the case of moderate medium conditions, such as low-pressure unpurified compressed air and low-pressure circulating water. Butt welding flanges are used for pipelines that transport expensive, flammable and explosive media. Butt welding flange is not easy to deform, well sealed, widely used, and the nominal pressure PN is about 16MPa.

　　2. Different welding methods: PL flange welding only needs to be welded on one side without welding the inner port of the pipe and flange connection; the welding installation of butt welding flange requires double-sided welding of the flange. Therefore, butt welding is used to reduce stress concentration. Generally, butt welding flanges are mostly neck flanges, also called nipple flanges.

　　3. Different prices: PL flanges are relatively cheap; but welding flanges have one more process, so the installation costs, labor costs and auxiliary materials costs of butt welding flanges are higher, and the price is relatively expensive.