If it is regulated, it must meet all of the requirements for a new installation. In addition, a request to install used equipment must be approved by the Director/Chief Inspector. Such a request must include information pertinent to the history of the equipment; including its use and present condition, and any documents such as inspection and repair reports that will substantiate its fitness for continued service. To assure that the used or second hand boiler or pressure vessel is fit for the service into which it is intended to be placed, it may be necessary to require that the subject vessel be subjected to ultrasonic thickness testing, and potentially, one or more types of Non Destructive Examination, including those intended to detect flaws open to the surface of the vessel (Magnetic Particle Testing, Dye Penetrant Testing), or techniques intended to identify flaws that may exist through the entire wall thickness of the vessel, such as Ultrasonic Testing (Shear Wave, Phased Array, Time of Flight), or Radiographic Testing.