AWWA flanges come in a huge amount of variety. In this article, we look at some of this variety which is on offer, delving into the unique attributes of each.
The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes.
The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension.
The Welding neck flanges is normally referred to as the high hub flange.
Threaded (Screwed) flange is similar to the Slip-On flange, but the bore is threaded.
The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.
At some point, with all the possibilities of thread form, diameter, and pitch, you need to send it off to SK Grimes or another machinist.
Dimensions from carbon steel and stainless steel flanges are defined in the ASME B16.5 standard. The material qualities for these flanges are defined in the ASTM standards.
Flange facing is the process of resurfacing flanges by machining new mating surfaces, to ensure a perfect seal when assembled.