40 Pa. Stat. § 856
Whenever such insurance company shall have inspected a boiler or boilers as hereinbefore provided for and shall have issued a policy of insurance thereupon, it shall be the duty of such company at the same time to issue a certificate of inspection, which shall set forth that the inspection, tests, attachments and indicators have been found to be in accordance with the requirements of the city ordinances. Such certificate shall also state the number of pounds pressure to which the boilers have been subjected in testing, together with the amount of pressure the user is authorized to carry within the same, in accordance with the provisions of the city ordinance in that case provided. It shall further state that said boiler or boilers so inspected have been insured in said company, and that the holder of the certificate is required to maintain it in a conspicuous place near the boiler or boilers to which it refers.
40 P.S. § 856