AIR HOSE

Prohibition on playing around with compressed air hoses, e.g. aiming directly at any individual. 

Breathing apparatus Light duty construction air line Fresh air hose and compressed air line Self contained 10-2000... 

The valve was operated by compressed air, and the two air hoses, one to open the valve and one to close it, were connected up the wrong way around. The two connectors should have been different in size or design so that this could not occur. In addition, they were not disconnected, and a lockout device on the valve—a mechanical stop—had been removed. It is also bad practice to carry out work on equipment isolated from hot flammable gas under pressure by a single isolation valve. The take-off branch should have been slip-plated, and double block and bleed valves should have been provided so the slip-plate could be inserted safely (Figure 1-1), [16, 17]. 

Air-cooled surfaces may be cleaned by brushing off the accumulation of dust and fluff where the air enters the coil, by the combination of a high-pressure air hose and a vacuum cleaner, or, with the obvious precautions, by a water hose. Foaming detergents are also used. 

Compressed gases, therefore, present a unique hazard from their potential physical and chemical dangers. Unless cylinders are secured they may topple over, cause injury to operators, become damaged themselves and cause contents to leak. If the regulator shears off, the cylinder may rocket like a projectile or torpedo dangerously around the workplace. Other physical hazards stem from the high pressure of a cylinder s contents, e.g. accidental application of a compressed gas/air hose or jet onto an open cut or wound, whereby the gas can enter the tissue or bloodstream, is particularly dangerous. 

They clamped a 100-psi air hose to a nipple on the tank. A busy instrument worker gave them a gauge. The gauge was incorrectly chosen for vacuum service and not pressure because the vacuum identifier was small. 

Supplied Air Breathing Apparatus (SABA) SABA, when combined with an emergency escape bottle, provides the safest combination for respiratory protection. It provides air from a remote supply connected via an extended air hose, and has an escape cylinder rated for five to fifteen minutes of use, in case the remote air supply in compromised. SABAs are not as bulky or cumbersome as SCBAs, and enable longer work periods. The disadvantages of SABAs are the air lines can get tangled, and damaged by cuts, abrasions, and chemical contamination. Also, the airlines will limit your range, and the user will have to exit in the same manner as he or she entered the area. 

Location of the hazard area. Air supply for a hose mask or air line respirator requires a source of clean, uncontaminated air within the distance limits of the air hose, that is, 300 feet for a hose with an attached air blower and 75 feet without a blower. Obviously, before selecting a respirator of that type, the source of clean air should be identified. 

According to the OSHA investigation report, the reactor was undergoing a regular maintenance procedure for the removal of a solidified polyethylene blockage on three of the six reactor settling legs. The procedure called for the isolation of the 8-inch valve and the removal of the compressed air hoses used to operate the valve. [7]... 

After the explosion, investigators confirmed that the 8-inch DEMCO block valve was open at the time of the accident. Furthermore, tests showed that the compressed air hoses were improperly connected in a reversed position. This unauthorized step during maintenance... 

The procedure was to clear the transfer fine of the waxy material with compressed air supply just before the transfer fine was put in service. On the evening of the accident, an operator connected an air hose to a 90 psig (6 bar) supply to clear the entire 200 meters (600 ft.) of feed line. The operator then walked to the elevated tank to determine if air could be heard rushing out of the tank vent. He heard nothing. The operator spoke to two maintenance employees working near the end of the 20-m3 (700 ft3 or 5,300 gallon) tank and left the area to find his supervisor. Shortly after that, one end of the tank blew off, and the two maintenance mechanics plunged some 40 ft. (12 m) to their deaths. [7]... 

There are two types of hot air guns those that have a fan and those that do not. The obvious advantage of those with fans is that they are self-contained. The disadvantage is that the fan motor can create sparks, which could be hazardous depending on ambient gas conditions. The disadvantages of the motorless (no fan) design You must have access to pressurized air, and the unit must have both a power cord and air hose for operation. 

The air hoses connecting the open and closed sides of the valve were identical, thus allowing the hoses to be cross-connected and permitting the valve to be opened when the operator intended to close it. 

The air supply valves for the actuator mechanism air hoses were in the open position so that air would flow and cause the actuator to rotate the DEMCO valve when the hoses were connected. 

Air hoses were improperly connected in the reversed position. 

The procedure was to clear the transfer line of the waxy material with a compressed air supply just before the transfer line was put in service. On the evening of the accident, an operator connected an air hose to a 90 psig (6 bar) supply to clear the entire 200 meters (600 ft.) of feed line. The operator then walked to the elevated tank to determine if air... 

August 9,1999— Tangled air hoses prevent DPE entrants from reaching egress air locks. 

As a final precaution, any dirt created by the action of the ejector blast on the particles, may be drawn away from the window area by a dust extraction nozzle, positioned just below the optical box. Similarly, for wet or frozen product applications water jets and wiper blades can be substituted for air-based systems. Machines for sorting wet product are periodically hosed down with water, so must be water and dust proof to IP65 standards. Similarly, dry product machines are also manually cleaned with an air hose. For hygiene reasons, all potential bug traps must be designed out of all sorting machinery. 

Squeeze open the neck of the bag, fit a Pasteur pipette to the end of an air hose, and introduce a fine, slow stream of air to the bag via the neck. Check to see if any air escapes from the edges of the bag (if air escapes at any point that section must be welded again, as in step 8). 

The burner is equipped with a flame setting device to adjust the flame geometry. The readings on the scale refer directly to the adjustment of the deflection angle of flexible air hoses. For instance a 10° hose deflection angle is foreseen for a long flame (scale indication... 

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