40 Pa. Stat. § 858
It shall be the duty of the inspector of steam engines and boilers, in and for all cities of the first class, to furnish all steam boiler insurance companies, such as aforesaid, or their authorized agents, with printed forms properly prepared, with appropriate headings, for the reception of the details of inspection, such as are furnished to his own assistants, and in addition thereto, a form of certificate setting forth that the premium upon the policy of insurance to be issued in connection with the certificate of inspection equals or exceeds the amount provided for in article third of section two of this act, and when these forms are returned to him properly filled up with the certificate duly signed, he shall record the same as provided for in the city ordinance; and the inspector of steam engines and boilers aforesaid is hereby authorized and required to affix his signature and official seal to the certificate of inspection of such insurance companies: Provided, The details of inspection as aforesaid shall show that the requirements of the city ordinances relative to boiler inspections have been fully complied with, and that all the provisions of this act relating to the duties of such insurance companies have been fulfilled. The inspector of steam engines and boilers in and for all cities of the first class shall receive for such approval one dollar for each boiler, which shall be paid into the city treasury, but said approval shall not be in effect for a longer period than one year from the date thereof. Any person or persons possessing such certificate of inspection duly approved as hereinbefore provided for, the same not having been rendered invalid as provided for in this act, shall be deemed to possess the certificate of the inspector of steam engines and boilers for the purpose of the act of the assembly and the ordinance of the city to carry same into effect: Provided, That nothing in this act shall affect the duty of the inspector to withhold or withdraw such certificate, whenever he may deem the engineer incompetent or unreliable, as provided for in the city ordinance, or whenever he may consider the boiler or boilers unsafe.
40 P.S. § 858