Hoses hazards

An October 2011 Beacon [6] also addressed Hose Hazards. One of the important messages of that Beacon stated ... 

Center of Chemical Process Safety, AIChE. Beacon - messages for manufacturing personnel. Hose hazards Oct 2011. 

Earlier in this chapter we read the British Health and Safety laboratory report findings on the poor performance of hoses and how they contribute to loss of containment, so hose risers mnst be aware of the potential. The practitioners from the AIChE that create, draft and edit the monthly pubhcations the Beacon has discussed hoses in at least two issnes. The October 2011 Beacon , drafted and coordinated by Dennis C. Hendershot, was entitled Hose Hazards. [17] The Hose Hazards issue asked the readers if they knew ... 

Spills and releases from transfer hoses during decoupling operations Subsurface disposal of materials containing hazardous substances... 

Health Hazards Information - Recommended Personal Protective Equipment Chemical safety goggles and full face shield, self-contained breathing apparatus (SCBA), positive pressure hose mask, airline mask rubber safety shoes, chemical protective clothing Symptoms Following Exposure Inhalation causes irritation of nose and throat, a feeling of pressure in the chest, and shortness of breath. Nausea... 

Minimize contamination via fewer cross-connections and fewer hose stations. Minimize the number of hoses required in loading/un-loading facilities. Cross-contamination, sometimes even from catalytic amounts of material, can result in undesired hazardous reactions. To prevent contamination due to rainwater and spills, consider storing a material that can react vigorously with water under a roof. 

A thorough inspeetion of equipment, whieh may inelude frisking or a wipe test, helps determine the duration of and methodology seleeted for deeontamination. All equipment parts should be eonsidered highly eontaminated, removed, and replaeed before the equipment leaves the worksite. Porous items (i.e., wooden truek beds, eloth hoses, wooden handles) usually eannot be thoroughly eleaned and should be disearded (as hazardous waste if neeessary). 

When a line is drained or blown clear, liquid may be left in low-lying sections and run out when the line is broken. This is particularly hazardous if overhead lines have to be broken. Liquid splashes down onto the ground. Funnels and hoses should be used to catch spillages. 

All hoses should be inspected and tested regularly and marked to show that they have been approved for use. A good practice is to change the color of the label every 6 or 12 months. This incident is a good illustration of the way both operators and managers become so used to the hazards of process materials that they fail to establish and maintain proper precautions. How often had the wrong... 

The hazards of water hammer are described in Section 9,1,5 and the hazards of ice formation in Section 9,1,1, This section describes some accidents that have occurred as the result of the sudden vaporization of water, incidents known as boilovers, slopovers, foamovers, frothovers, or puking, Boilover is used if the tank is on fire and hot residues from the burning travel down to the water layer, Slopover is often used if water from fire hoses vaporizes as it enters a burning tank. Sections 9,1.1 and 12.4.5 describe incidents in which vessels burst because water that had... 

The incidents described could occur in many different types of plants and are therefore of widespread interest. Some of them illustrate the hazards involved in activities such as preparing equipment for maintenance and modifying plants. Others illustrate the hazards associated with widely used equipment, such as storage tanks and hoses, and with that universal component of all plants and processes people. Other incidents illustrate the need for techniques, such as hazard and operability studies, and protective devices, such as emergency isolation valves. 

Monitors and deluge sets-Many chemical plants use monitors for general use and for high hazard locations in order to provide maximum water supply with a minimum of manpower exposure. Deluge sets supported by ample hose streams are preferred for some protection uses. 

According to the AMC News article authorities summed up the report by pointing out that the incident was not the direct result of normal operations, but rather was the result of an unusual condition, and that the design and operating procedures were not unsafe when considered in the context of the total hazardous environment. The process in the nitration and purification building was operating normally when the rubber hose was introduced into the system. 

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. 

Use the system described in Problem 7-13, part b, to determine the hose diameter required to eliminate the potential hazard resulting from static buildup. 

The foreman recognized a possible hazard from flammable vapor escaping from the vent pipe and igniting on the sparks from the welding operation. He connected a hose to the vent at the top of the tank and ran the hose down to the ground. Because the flammable vapors were water soluble, he stuck the end of the hose in a drum full of water. During a subsequent operation that involved emptying the tank, an accident occurred. Can you explain what happened and how ... 

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