These type of flanges are applied when pipes are welded to the necks of pipe flanges so that they become fastened as one. Weld neck flanges have tapered necks, which are usually long in length and are thus preferred in high stress applications. They are welded with pipes so that stress is transferred from the welded neck to the actual pipe itself, and they typically come in the following faces:
They provide very durable connections and are resilient enough to withstand most dishing. They are also great for working in areas where there are unpredictable temperature changes. Typically, weld neck flanges are made from a wide range of steel grade materials, including:
You’ll want to make sure that when ordering your weld neck flange (also known as high-hub or tapered hub flange) you indicate precisely the size of your pipe because the diameter on the inside of the flange will match up exactly with the diameter on the inside of your pipe.
Weld neck flanges are one of the many types of flanges that we specialize in and carry at Detroit Nipple Works. Not sure if weld neck flanges are right for your application? Find out more about other flanges we specialize in;
What makes weld neck flanges different from these other flanges is that they are designed to be joined to a piping system by butt-welding, which is when welding of two almost parallel parts are welded together. Weld neck flanges also sport a long neck, which is why they are preferred in high-pressured applications.