New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

A Class 6000 steel threaded coupling corresponds to the extra heavy classification of steel pipe. This classification is significant because it indicates that the coupling is designed to withstand higher pressures than standard or schedule pipes, making it suitable for high-pressure applications. In terms of dimensions, extra heavy fittings are thicker than standard or schedule 40 fittings, allowing them to accommodate the increased stress. The ANSI/ASME system categorizes pipes and fittings based on their pressure ratings, with Class 6000 being suitable for highly demanding environments. Therefore, when dealing with high-pressure systems, the extra heavy designation ensures that the components will have the necessary structural integrity and durability to function safely and effectively. Understanding the differences in classifications can help pipe fitters select the appropriate components for their specific applications, ensuring compliance with safety regulations and operational requirements.