Class 150 threaded flanges connect with low-pressure (100-299 psi) pipe and fittings. Threaded flanges, also called screwed flanges, include threads inside the flange bore which connects to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face. Threaded connections include NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper). Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 150 blind flanges connect with low-pressure (100-299 psi) pipe and fittings. 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. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 150 slip-on flanges connect with low-pressure (100-299 psi) pipe and fittings. 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. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 150 socket weld flanges connect with low-pressure (100-299 psi) pipe and fittings. 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. This weld creates a smoother bore and better flow of fluid or gas inside the pipe. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 150 butt weld flanges connect with low-pressure (100-299 psi) pipe and fittings. 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 and allow for a smooth, flush connection for maximum flow of gas or liquid. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 150 lap joint flanges connect with low-pressure (100-299 psi) pipe and fittings. These 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, eliminating issues with bolt-hole alignment. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 threaded flanges connect with medium-pressure (300-999 psi) pipe and fittings. Threaded flanges, also called screwed flanges, include threads inside the flange bore which connects to the external threads on a pipe without welding. These flanges typically have a raised, flat, or RTJ (ring-type joint) face. Threaded connections include NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper). Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 blind flanges connect with medium-pressure (300-999 psi) pipe and fittings. 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. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 slip-on flanges connect with medium-pressure (300-999 psi) pipe and fittings. 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. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 socket weld flanges connect with medium-pressure (300-999 psi) pipe and fittings. 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. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 butt weld flanges connect with medium-pressure (300-999 psi) pipe and fittings. 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 and allow for a smooth, flush connection for maximum flow of gas or liquid. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 300 lap joint flanges connect with medium-pressure (300-999 psi) pipe and fittings. These 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. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 1500 threaded flanges connect with high-pressure (1000-3000 psi) pipe and fittings. Threaded flanges, also called screwed flanges, include threads inside the flange bore which connects to the external threads on a pipe without welding. Threaded pipe flanges typically have a raised, flat, or RTJ (ring-type joint) face. Threaded connections include NPT (National Pipe Thread) or BSPT (British Standard Pipe Taper). Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 1500 blind flanges connect with high-pressure (1000-3000 psi) pipe and fittings to transport air, water, natural gas, oil, and steam in plumbing applications and food and dairy processing. 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. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 1500 slip-on flanges connect with high-pressure (1000-3000 psi) pipe and fittings. 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. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 1500 socket weld flanges connect with high-pressure (1000-3000 psi) pipe and fittings. 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. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.

Class 1500 butt weld flanges connect with high-pressure (1000-3000 psi) pipe and fittings. 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 and allow for a smooth, flush connection for maximum flow of gas or liquid. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.