Threaded Flanges as per Table D
Threaded flanges, also known as screwed flanges, are an integral part of any plumbing system. When working with a threaded flange, it is important to reference the correct Table to get the correct information regarding the specifications and requirements. Table D, which is maintained by the American National Standard Institute (ANSI), outlines the dimensions and requirements for sizes from 1/2” through 12”.
For standard threaded flanges, the face of the flange, which is the end that is exposed to the threads, must have a machined surface. This will ensure that the threads form a good fit inside the flange when tightened. The machined surface is what helps be the primary seal against the system pressure, ensuring that no material can escape the flange join.
The inside diameter of a standard flange is slightly smaller than the outside diameter of the pipe that it is connected to. This ensures a good fit when the flange is tightened. The outside diameter of the flange can vary based on its application.
Threaded flanges designs usually include two-piece or three-piece configurations. The two-piece design is extremely popular because it is easy and economical to use. As its name implies, the two-piece design consists of two flanges that are connected together via bolts and nuts. The three-piece design, on the other hand, consists of three parts - two flanges and a center spigot.
Threaded flanges are available in both raised face (RF) and flat face (FF) designs. Both have very different applications. The RF design is generally used for high-pressure applications because the raised surface provides more stability and strength. The FF design, on the other hand, is better suited for low-pressure applications, since it is easier to seal, compared to the RF design.
It is important to select the correct type of flange for the job. When referencing Table D, the size, nominal diameter, pitch, length, and face type of the flange must be taken into consideration. Once the proper flange is determined, it is important to take the necessary precautions during assembly and installation to achieve a complete and proper seal.
Q: What is an MS threaded flange? A: An MS threaded flange is a type of flange that is used to connect pipes or valves to a piping system. It has a threaded hole in the center, which allows for easy installation and removal of the flange.Q: What is Table D in MS threaded flanges? A: Table D is a standard specification for MS threaded flanges. It specifies the dimensions, pressure ratings, and materials for MS threaded flanges.Q: What are the dimensions of MS threaded flanges as per Table D? A: The dimensions of
