(20 ft.) in length shall have at least two (2) manholes. removable heads or cover plates of a size not less than the required area of the openings and located to provide adequate view of its interior. suitable manhole, hand hole or other openings for inspection, examination and cleaning orī. (1) Except for those types of pressure vessels where such inspection openings are impracticable, pressure vessels shall be provided with:Ī. When an inspection shows deterioration of the pressure vessel the permissible safe working pressure shall be reduced to maintain a factor of safety of not less than five (5) or such other figure as may be specified in the specification to which the pressure vessel was made, provided, that after twenty five (25) years of age, the factor of safety shall be increased by ten percent (10%) (3) Installation shall be as provided under Rule 1167. (2) Pressure vessels installed underground shall be placed in concrete or brick pits with removable covers. (1) Pressure vessels shall be installed in a way that all parts are readily accessible for inspection. (4) Application for permit for locally fabricated pressure vessels shall be filed with the Department accompanied by design and specification in four (4) copies. (3) Every pressure vessel shall be accompanied by a certificate issued by the Manufacturer showing the specifications to which the vessel has been constructed and its maximum permissible working pressure. (2) The materials used in the construction of pressure vessels shall be of such quality as to reduce to the minimum the causes of corrosion and electrolysis. of sufficient strength to sustain internal pressure to which they are normally subjected. designed to be suitable for their intended use, andī. (1) Pressure vessels, their fittings and attachments shall be:Ī. (6) “Working pressure” shall mean a gauge pressure or pressure above the atmospheric pressure in kg./cm 2 g (psig.).įor purposes of inspection, checking, tests, and other purposes, prior to the approval of any installation and use of any pressure vessel, the provisions of Rule 1162.01 shall apply. (5) “Refrigeration tank” shall mean a pressure vessel used in refrigeration system, excluding the piping of such system. (4) “Air pressure tank” shall mean a pressure vessel used as primary and secondary tank in connection with ordinary compression cycles, and receiving its air supply direct from the compressor. (3) “Water pressure tank” ” mean a pressure vessel used for heating water by means of live steam or steam coil, or for the storage of cold water to be dispersed by means of pressure. (2) “Steam heated pressure vessels” shall mean an airtight vessel or an open pan or kettle, which is steam jacketed or equipped with steam coil or steam supply piping and is used in such operations as cooking, distilling, drying, evaporating and hardening. This definition shall not include portable cylinders for the storage of compressed gases. (1) “Unfired pressure vessels” shall mean any closed vessel other than a boiler constructed to hold steam, hot water, gas or air, ordinarily supplied from an external source or from the indirect application of heat.
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