At Mattsco, we offer a wide variety of carbon steel, stainless, and alloy flanges in many different sizes, connection types, and pressure ratings to best suit your project needs.

Sizes: 1/2” – 36”

150#, 300#, 600#, 900#, 1500# and 2500#

Weld Necks, Long Weld Necks, Blinds, Slip-on, Threaded, Socket Weld, Lap Joints, Reducing and Orifice


Carbon – A/SA105, SA105N Fine Grain Practice

Low Temp – A/SA350 LF2

Chrome – A/SA182 F5, F9, F11, F22, F91

Stainless – A/SA182 304/304L, 316/316L, 304/H, 321/H, 347/H, 317/L, 310/S, Duplex 2205 Super, Duplex 2506, Alloy 20

Nickel Grades: Alloy 800/H/HT, Alloy 825, Alloy 600/601, Alloy 625, Alloy 400, Grade C276, Nickel 200/201

High Yield – A694 F42-F70

Long Weld Necks

As the lightest and most economical connection, long weld neck flanges can help reduce the testing and time involvement sometimes associated with regular flanges and can be utilized in a variety of industries. In addition to standard connection mechanisms, Mattsco also provides specialized components so that you can find the long weld neck flanges in the shape, size, weight, and material that work best for your specific business needs.