Abstract: Provided is a method for cleaning the inside of a pressure tight container for a blasting treatment, wherein the inside of a pressure tight container can be cleaned for a short period of time after a blasting treatment.

Abstract: The present application provides an ice blast cleaning method for a layer of slag on a surface. The ice blast cleaning method may include the steps of maintaining the surface with the layer of slag thereon at an elevated temperature, shooting a number of ice pellets at the layer of slag on the surface, and loosening the layer of slag on the surface via a mechanical impact of the ice pellets on the layer of slag and a thermal shock caused by a temperature differential between the ice pellets and the layer of slag.

Abstract: An apparatus has a body with first and second faces, an inboard surface bounding a central aperture, an outboard perimeter, and an array of bolt holes between the first and second faces. A channel is inboard of the bolt holes and first and second ports communicate with the channel. The apparatus may be used as a cooling flange in a detonative cleaning apparatus.

Abstract: The invention is related to a so-called on-line method and a device for the cleaning of contamination with dirt, resp., caking or slag deposits in vessels and combustion installations by means of blasting technology. For this purpose, an explosive gas mixture is made to detonate in the proximity of the contamination with dirt, resp., caking or slag deposits.

Abstract: A flashback protection apparatus and method for suppressing deflagration of a deflagration-susceptible gas in a flow system in which the deflagration-susceptible gas is flowed. The method of the invention comprises monitoring the combustible gas to detect deflagration therein, and upon detection of a deflagration event producing a propagating flame front, opposedly directing at the propagating flame front a pressurized non-flammable gas in a sufficient volume and at a sufficient velocity to provide a non-flammable gas flow having a momentum at least opposedly equal to momentum of the propagating flame front and the associated accelerated combustible gas undergoing deflagration.

Abstract: A pivotal housing member has an end pivotally coupled to an end of a base housing member for movement between a retracted or folded position and an extended position. The pivotal housing member has a pulsed deflagration or detonation device located therein for producing pulsed deflagration or detonation pressure waves for cleaning purposes. When the pivotal member is in its folded position, the two housing members may be moved through the opening formed through the wall of a boiler, etc. for cleaning the interior surface of the wall with the pulsed pressure waves. In order to increase the wall area cleaned from a given wall opening, the two housing members may be rotated about an axis of the base housing member and the pivotal housing member pivoted to different extended positions from its folded position.

Abstract: A center transfer unit positioned between a solids collection chamber and a cleaning particle vessel contains vibrating inclined screens to separate chunks of waste solids from cleaning particles recycled to the cleaning particle vessel.

Abstract: A method for removing soot or the like adhered to heat transfer tubes of a heat-exchanger by providing a steel ball scatterer above the heat transfer tubes and intermittently scattering steel balls towards the heat transfer tubes, is improved. The improvements reside in that a steel ball scattering rate is set to a small initial rate at the commencement of the scattering operation and thereafter is increased either in a stepwise manner or continuously. Preferably, within a main body casing of the heat-exchanger, a plurality of steel ball collision preventing plates having their central portions extending convexly upwards are provided between the steel ball scatterer and the heat transfer tube group, in order to prevent fins of the heat transfer tubes from being damaged by steel balls falling from the steel ball scatterer and directly colliding against the fins.

Abstract: A contra angle handpiece of this invention employs a laser beam transmitting glass fiber for dental treatment in such a manner that the transmission of the beam is carried out not by a reflecting mirror, but by a glass fiber centripetally held with respect to the handpiece by means of resilient grip members. As a result, the disadvantages of the prior art such as reflection factor reduction and reflection angle changes, which result from the use of a reflecting mirror in a contra angle dental handpiece, are eliminated.