Threaded flange is connecting with pipe without welding. It is similar to slip on flange or a socket joint weld flange, Integrated with a tapered thread screw located within the flange bore that is mounted on the pipe with corresponding external threads. In some cases a seal weld also applied in conjunction with threaded pipe flange. Standard astm a105, Astm stainless steel, A182 material alloy steel, Carbon steel size range 1/2, 1, 2, 3, 4 to 24 pressure class class 150 to 2500 face raised face rf, Ring type joint rtj though threaded pipe flange can be found in threaded fittings, Different dimensions mostly serves as a component in small diameters pipeline. Below 4 inch normally. In It cannot, Contrast hand be compatible with a pipe system in thin wall thickness, Since space is unavailable for doing the threading.