Blanking plugs are used to seal bulkheads or panels where optional lightning protectors are not installed. Blanking plugs serve to block off the sensor bores where no sensor is used. These plugs are useful for pressure testing the tubing string or to abandon certain zones within a well. Blanking plugs use a removable prong that is inserted into the plug to equalize the pressure across the plug and to complete the fluid seal. Blanking plugs are fitted in the engine intakes & jet pipes and the tail parachute retrieved & stowed for transport. Blanking plugs are fitted to the heater hoses.

Blast Chilling is widely used and efficient method of reducing the temperature in cooked and, in some cases, raw food at a very rapid rate. Correctly packed food is stacked onto racks or trolleys designed to fit into the chillers. Powerful fans then circulate the air in the chiller over refrigerated elements and the food within the cabinet. The movement of air reduces the insulating properties of the air on the surface of the food and allows the temperature of the food to be reduced very rapidly. Sensors placed in the food and in the cabinets stop the cooling process as soon as the desired temperature is reached, at which point the chiller becomes a holding cabinet.

Blast furnace is a metallurgical furnace, which is used for smelting to produce metals, generally iron. A furnace in which combustion is intensified by a blast of air, especially a furnace for smelting iron by blowing air through a hot mixture of ore, coke, and flux. In a blast furnace, fuel and ore are continuously supplied through the top of the furnace, while air is blown into the bottom of the chamber, so that the chemical reactions take place throughout the furnace as the material moves downward. The end products are usually molten metal and slag phases tapped from the bottom, and flue gases exiting from the top of the furnace. Blast furnaces are to be contrasted with air furnaces, which are naturally aspirated, usually by the convection of hot gases in the a chimney flue.