What type of fitting should a steamfitter use when piping the LWCO?

When piping the LWCO (Low Water Cut Off), the use of malleable, forged, or flanged crosses is essential. These types of fittings are designed to withstand the high pressures and temperatures typically encountered in steam applications. Malleable iron fittings, in particular, provide excellent strength and durability, making them suitable for the requirements of steam systems.

Additionally, forged fittings offer higher tensile strength than regular cast fittings, which is advantageous in maintaining the integrity of the piping system. Flanged fittings also allow for secure connections that can be easily disassembled for maintenance or repairs, aligning well with the operational needs of steamfitting.

Copper fittings, while they conduct heat well and prevent corrosion, may not be the best choice for every application involving high temperatures and pressures found in steam systems. Plastic unions are unsuitable because they cannot tolerate the elevated temperatures of steam. Brass elbows, although they are sometimes used, may not provide the same level of durability and heat resistance required for steam piping as malleable or forged fittings do. Therefore, using malleable, forged, or flanged crosses best addresses the demands of safely and effectively piping the LWCO in steam systems.