Module 9: Control Techniques - International Association of Fire ...

More documents

Recommendations

Info

IAFF Training for Hazardous Materials: Technician© Student Text • Patching is the placement of a material over an opening in a container. Again, these devices can be purchased commercially or made by responders. Patching items used include neoprene or rubber gasket material with webbing, epoxy/glue patches, and sections of containers cut to fit various curves. There are many pre-made kits available for use in plug and patch operations. Some manufacturers produce kits that contain various sizes of rubber stoppers, cone wedges, molly bolts for use with stoppers, different sizes and materials of gaskets, epoxy patches and web-type clamps. These can be used on smaller leaks on any size container. • Bandages can be used with, or instead of patches. Bandages, which are usually made of flexible metal, encircle the container to hold a patch in place. They can be pneumatically operated, tied, twisted, or tightened by toggle bolts. • Auxiliary closure devices are meant to be used when an engineered opening such as a valve, cover, or manway has been breached. Dome cover clamps are typically used on the manways of road liquid cargo tanks. They fit over the dome cover of a manway and tighten down to press the cover back into position. If the leak is caused by a faulty or missing gasket, dome cover clamps may not stop the release completely. Dome clamps can be purchased in varying sizes. It is advisable to carry more than one size and to carry enough to control breaches in all size covers you may encounter in your jurisdiction. Kits are available for cylinders that allow you to place a hood over a leaking valve. This hood contains another valve which can then be closed. 9-20 Module 9: Control Techniques
Student Text IAFF Training for Hazardous Materials: Technician© Activity • Sealants are clay-like, chemically-resistant materials that can be used like putty to seal leaks from small holes or tears, or to seal the area around a leaking plugging device. They can be a quick and effective means to seal small leaks before overpacking or bandaging, however they may not be effective when the head pressure increases. Commercial sealants are available from a variety of sources. Most are resistant to fuels, and specialized corrosive resistant types can be purchased. • Engineered and provided methods refers to devices that are built into the container. Many fixed facility containers have redundant valve systems which means the product can be shut off at more than one place. If you can find a product control flow valve, you may be able to stop the flow without direct intervention. Always check with the container owner or specialist to determine that closing a valve will not cause a problem elsewhere. The Chlorine Institute developed specialized containment kits for cylinders and tanks transporting their product. The “Chlorine A Kit” is designed to handle cylinders with a capacity of up to 150 lbs. The “Chlorine B Kit” is designed to handle one ton cylinders and the “Chlorine C Kit” is designed to handle leaks from dedicated rail cars of chlorine. Chlorine kit instructions as well as manuals on chlorine, can be obtained from the Chlorine Institute, 2001 L St., N.W., Washington, D.C. 20036. These kits contain a variety of materials and can be used to seal almost any kind of leak from a pressure cylinder of chlorine. They are large, heavy and very specialized but they do come with an excellent set of instructions and procedures. If a jurisdiction intends to use one or more of these kits, it is mandatory that you train with them on a regular basis and maintain proficiency in their use. An emergency scene is not the place to learn how to use these items. Module 9: Control Techniques 9-21
Page 1 and 2: Student Text IAFF Training for Haza
Page 19: Student Text IAFF Training for Haza
Page 71 and 72:
Student Text IAFF Training for Haza
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
show all

Module 9: Control Techniques - International Association of Fire ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?