What is the maximum BTU/hr load when using 3/4 inch black pipe (ASTM A-53) for a pipe run of 60 feet?

The maximum BTU/hr load for a 3/4 inch black pipe (ASTM A-53) can be determined using the appropriate tables and calculations provided by the NFPA 58 Liquefied Petroleum Gas Code, which accounts for factors such as the pipe diameter, length of the run, and type of gas.

In this case, for a 3/4 inch black pipe with a 60-foot length, it is understood from code tables that it can accommodate a maximum load of up to 231,000 BTU/hr under typical conditions. This value takes into consideration the pipe's ability to deliver gas effectively while maintaining safe pressure levels, as stipulated by the code.

This answer reflects an understanding of the flow capabilities of the pipe size and length within the framework of safe gas distribution. Thus, option detailing 231,000 BTU/hr is considered correct based on the BTU load capacities outlined in NFPA 58 for this specific setup.