Class 125 threaded flanges connect with low-pressure (100-299 psi) pipe. Threaded flanges, also called screwed flanges, include threads inside the flange bore that connect to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 125 blind flanges connect with low-pressure (100-299 psi) pipe. Blind flanges, also called blank flanges, seal the end of piping systems or pressure vessel openings to test the flow of a gas or liquid. Blind flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 150 threaded flanges connect with low-pressure (100-299 psi) pipe. Threaded flanges, also called screwed flanges, include threads inside the flange bore that connect to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 150 blind flanges connect with low-pressure (100-299 psi) pipe. Blind flanges, also called blank flanges, seal the end of piping systems or pressure vessel openings to test the flow of a gas or liquid. Blind flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 150 slip-on flanges connect with low-pressure (100-299 psi) pipe. Slip-on flanges, typically with raised or flat faces, slip over pipe. These flanges are manufactured with an inside diameter slightly bigger than the pipe's outside diameter. The pipe slides through the flange and is welded on both sides.

Class 150 socket weld flanges connect with low-pressure (100-299 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. This weld creates a smoother bore and better flow of fluid or gas inside the pipe. These flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 150 butt weld flanges connect with low-pressure (100-299 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from the flange and the hub’s base to the pipe. The inside diameter of the flange matches the pipe's inside diameter. Butt weld flanges typically have a RTJ (ring-type joint) face.

Class 150 lap joint flanges connect with low-pressure (100-299 psi) pipe. Lap joint flanges are most commonly used with stub end fittings and slide directly over the pipe. The pipe is welded to the stub end, allowing the lap joint flange to rotate freely around the stub end and eliminating issues with bolt-hole alignment. Lap joint flanges dismantle easily for frequent access to inspections, modifications, and cleaning.

Class 150 XS socket weld flanges connect with low-pressure (100-299 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. Socket weld flanges typically have a raised, flat, or RTJ (ring-type joint) face. Class Extra Strong (XS) is based on the original 1927 standard that uses wall thickness and weight. Class XS is the same as Schedule 80S which is identical to Schedule 80 for NPS 1/8 to NPS 8.

Class 150 XS butt weld flanges connect with low-pressure (100-299 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from both the flange and the hub’s base to the pipe. The inside diameter of the flange matches the inside diameter of the pipe. Butt weld flanges typically have a RTJ (ring-type joint) face. Class Extra Strong (XS) is based on the original 1927 standard that uses wall thickness and weight. Class XS is the same as Schedule 80S which is identical to Schedule 80 for NPS 1/8 to NPS 8.

Class 300 threaded flanges connect with medium-pressure (300-999 psi) pipe. Threaded flanges, also called screwed flanges, include threads inside the flange bore that connect to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 300 blind flanges connect with medium-pressure (300-999 psi) pipe. Blind flanges, also called blank flanges, seal the end of piping systems or pressure vessel openings to test the flow of a gas or liquid. Blind flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 300 slip-on flanges connect with medium-pressure (300-999 psi) pipe. Slip-on flanges, typically with raised or flat faces, slip over pipe and are manufactured with an inside diameter slightly bigger than the pipe's outside diameter. The pipe slides through the flange and is welded on both sides.

Class 300 socket weld flanges connect with medium-pressure (300-999 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. This weld creates a smoother bore and better flow of fluid or gas inside the pipe. These flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 300 butt weld flanges connect with medium-pressure (300-999 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from the flange and the hub’s base to the pipe. The inside diameter of the flange matches the pipe's inside diameter. Butt weld flanges typically have a RTJ (ring-type joint) face.

Class 300 lap joint flanges connect with medium-pressure (300-999 psi) pipe. Lap joint flanges are most commonly used with stub end fittings and slide directly over the pipe. The pipe is welded to the stub end, allowing the flange to rotate freely around the stub end and eliminating issues with bolt-hole alignment. Flanges dismantle easily for frequent access to inspections, modifications, and cleaning.

Class 300 XS socket weld flanges connect with medium-pressure (300-999 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. Socket weld flanges typically have a raised, flat, or RTJ (ring-type joint) face. Class Extra Strong (XS) is based on the original 1927 standard that uses wall thickness and weight. Class XS is the same as Schedule 80S and identical to Schedule 80 for NPS 1/8 to NPS 8.

Class 300 XS butt weld flanges connect with medium-pressure (300-999 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from both the flange and the hub’s base to the pipe. The inside diameter of the flange matches the inside diameter of the pipe. Butt weld flanges typically have a RTJ (ring-type joint) face. Class Extra Strong (XS) is based on the original 1927 standard that uses wall thickness and weight. Class XS is the same as Schedule 80S and identical to Schedule 80 for NPS 1/8 to NPS 8.

Class 600 threaded flanges connect with medium-pressure (300-999 psi) pipe. Threaded flanges, also called screwed flanges, include threads inside the flange bore that connect to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 600 blind flanges connect with medium-pressure (300-999 psi) pipe. Blind flanges, also called blank flanges, seal the end of piping systems or pressure vessel openings to test the flow of a gas or liquid. Blind flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 600 slip-on flanges connect with medium-pressure (300-999 psi) pipe. Slip-on flanges, typically with raised or flat faces, slip over pipe. These flanges are manufactured with an inside diameter slightly bigger than the pipe's outside diameter. The pipe slides through the flange and is welded on both sides.

Class 600 socket weld flanges connect with medium-pressure (300-999 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. This weld creates a smoother bore and better flow of fluid or gas inside the pipe. Socket weld flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 600 butt weld flanges connect with medium-pressure (300-999 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from both the flange and the hub’s base to the pipe. The inside diameter of the flange matches the pipe's inside diameter. Butt weld flanges typically have a RTJ (ring-type joint) face.

Class 1500 threaded flanges connect with high-pressure (1000-3000 psi) pipe. Threaded flanges, also called screwed flanges, include threads inside the flange bore that connect to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 1500 blind flanges connect with high-pressure (1000-3000 psi) pipe. Blind flanges, also called blank flanges, seal the end of piping systems or pressure vessel openings to test the flow of a gas or liquid. Blind flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 1500 slip-on flanges connect with high-pressure (1000-3000 psi) pipe. Slip-on flanges, typically with raised or flat faces, slip over pipe. These flanges are manufactured with an inside diameter slightly bigger than the pipe's outside diameter. The pipe slides through the flange and is welded on both sides.

Class 1500 socket weld flanges connect with high-pressure (1000-3000 psi) pipe. Socket weld (SW) flanges attach to pipe by inserting the pipe into the socket end of the flange and applying a fillet weld around the flange/pipe. This weld creates a smoother bore and better flow of fluid or gas inside the pipe. Socket weld flanges typically have a raised, flat, or RTJ (ring-type joint) face.

Class 1500 butt flanges connect with high-pressure (1000-3000 psi) pipe. Butt weld flanges, also called welded neck flanges, attach by welding the pipe to the neck of the flange, transferring stress from the flange and the hub’s base to the pipe. The inside diameter of the flange matches the pipe's inside diameter. Butt weld flanges typically have a RTJ (ring-type joint) face.