Final answer:
The minimum wall schedule for a male threaded joint in carbon steel and NPS 1.5 and smaller isn't provided by Table 7.15. Relevant piping codes like ASME B31.3 should be consulted for specific requirements.
Step-by-step explanation:
The minimum wall schedule for a male threaded joint in normal fluid service, made of carbon steel and notched-sensitive, for NPS 1.5 and smaller, isn't specified in the provided reference material. While Table 7.15 Comparing Pipes: Economies of Scale in the Chemical Industry may discuss the economies of scale related to 4-inch pipe, 8-inch pipe, and 16-inch pipe, this does not directly inform the wall schedule for smaller pipes in the range of NPS 1.5 and under, with male threaded joints.
It is important to consult the relevant piping and pressure vessel codes, such as the ASME B31.3 for process piping, for the minimum wall thickness requirements based on the specific service conditions, material grade, and design considerations.
Here are examples of wall schedules for different pipe sizes:
NPS 1.5: Schedule 160
NPS 1: Schedule 160
NPS 0.75: Schedule 160
NPS 0.5: Schedule 160