SCH40 Stainless Steel Weld Neck Flange – Is a forged stainless steel pipe flange with a long tapered neck designed to be butt-welded to a Schedule 40 stainless steel pipe. It provides excellent strength, corrosion resistance, and smooth flow, making it ideal for high-pressure and high-temperature piping systems in the oil & gas, chemical, marine, and industrial sectors. It is commonly manufactured to ASME B16.5 and ASTM A182 standards.