Lap Joint Flanges

About

Lap joint flanges are used in piping systems built around stub ends, where easier bolt-hole alignment and simpler disassembly matter. Rather than creating a fixed connection on their own, lap joint flanges act as the backing flange in the assembly, allowing rotation around the stub end during installation. That makes them a practical choice for piping systems that need more flexibility during fit-up and better serviceability once the line is in operation. PipingNow offers lap joint flanges in the pressure classes and material options currently used across this product group, including 150# and 300# classes in 304L stainless steel, 316L stainless steel, A105 black carbon steel, and A105 galvanized carbon steel. For buyers searching specifically for lap joint flanges, that makes it easier to compare the correct flange style across available materials and sizes without sorting through a broader flange category filled with multiple connection types. Made for Stub End Assemblies The main advantage of a lap joint flange is how it works with a compatible stub end. Because the backing flange can rotate, installers get more freedom when lining up bolt holes during assembly. That can make field installation easier and can also help on systems that may need to be opened later for inspection, cleaning, maintenance, or future modification. Lap joint flanges are often used for: stub end piping assemblies systems that benefit from rotating flange alignment lines that may be dismantled for cleaning or inspection process piping with regular maintenance access fabricated systems that may need future changes industrial piping runs where easier bolt-hole alignment helps simplify installation 150# and 300# Lap Joint Flanges Lap joint flange selection usually starts with pressure class, nominal size, and compatibility with the rest of the assembly. In this collection, 150# lap joint flanges cover the broadest range of materials, while 300# lap joint flanges are available in stainless ste