This 1 socket weld flange is 304 Stainless Steel with a raised face face in 150#. Use this socket weld flange when you want a familiar, bolt-together connection you can service later without drama. Once welded, the connection is stable and helps keep the assembly from shifting under typical plant vibration. 304 offers a strong balance of durability, availability, and value. TheyÕre often chosen for smaller lines where a tidy weld setup matters and alignment is critical. Add it to your cart and keep your project movingÑsupport is here if you need it.