Find the minimum schedule 40 pipe size for LP two stage regulator that has a length of 45′ and a capacity of 170,000BTUH and a pressure drop of 1/2″ water column.

Find the minimum schedule 40 pipe size for LP two stage regulator that has a length of 45′ and a capacity of 170,000BTUH and a pressure drop of 1/2″ water column.