This chapter shall not apply to any existing or proposed building or extension thereof, used or to be used by a public utility corporation, as provided by 53 P.S. § 10619, nor shall this chapter apply to any building of the Township or extension thereof, or to the use of any premises by the Township, if the Board of Commissioners shall, after a public hearing, decide that such a building or extension thereof, or such use of any premises, is reasonably necessary for the convenience or welfare of the public, provided that any municipal recreational building or use may be established by the Board of Commissioners at any location in the Township without holding such public hearing.