Puncture protection design

Puncture protection design and cushion geotextile selection... 

A typical compressed gas tank car specification is TC/DOT-105A300W. Each part of the specification number has some significance TC is the designation of the Transport Canada DOT is the U.S. Department of Transportation designation. These jurisdictions permit the use of their designations individually or together in the manner shown. The first number, 105 in the example, is the DOT class of the tank car. A Class 105 tank car is an insulated, pressure car. For Class 105, 112, and 114 tank cars, the letter following the car class will indicate whether or not the tank car has thermal (fire) protection or tank head puncture protection. The letter A, shown in the example, indicates the tank car has neither. The letter J indicates... 

Puncture is normally seen from some other external object which penetrates the pack, e.g. fork lift truck. However, sharp items may penetrate the pack from within, hence such sharp features may need some external protective cover or be restrained/contained in carefully designed packs. 

Thermal desorption from a solid phase microextraction (SPME) fiber has shown considerable potential for selectively introducing semivolatile chemicals into an IMS. ° The SPME approach is a simple design patterned after the early platinum wire introduction thermal desorption system described. With SPME, semivolatile compounds are extracted by either absorption or adsorption onto a nonvolatile polymeric coating or solid sorbent phase that has been coated onto a small fiber. Normally, the adsorption liber is housed in the needle of a syringe to permit puncture of a sample bottle septum and to protect the fiber from contamination during transfer of the fiber from the sample to the IMS instrument. After the analytes are adsorbed onto the SPME fiber, the fiber is retracted into the needle and then injected in a normal syringe technique such that the fiber is extended into the heated region of the IMS and the analytes are desorbed from the fiber into the clean carrier gas of the IMS. 

Even without penetration, modem pistol bullets contain enough energy to cause blunt force trauma under the impact point. Vest specifications will typically include both penetration resistance requirements and limits on the amount of impact energy that is delivered to the body. Vests designed for bullets offer little protection against blows fi om sharp implements, such as knives, arrows or ice picks, or from bullets manufactured of non-deformable materials, that is, those containing a steel core instead of lead. This is because the impact force of these objects stays concentrated in a relatively small area, allowing them to puncture the fiber layers of most bullet-resistant fabrics. 

Sturdy safety shoes should have impact-resistant toes and heat-resistant soles to protect against hot work surfaces common in roofing, paving, and hot metal industries. The metal insoles of some safety shoes protect against puncture wounds. Safety shoes may also be designed to be electrically conductive to prevent the buildup of static electricity in areas with the potential for explosive atmospheres, or noncon-ductive to protect workers from workplace electrical hazards. All safety shoes must comply with the ANSI standard(s) mentioned above. In addition, depending on the types of worker exposures, there may be a need to provide specially designed safety shoes such as conductive or electrical-hazard safety shoes. 

It should however be once again emphasized that protection is provided by these design rules only against direct mechanical puncture (ductile fail-... 

Protective materials based on hard guard plates otter effective abrasion and cut protection, and will resist puncture threats from large penetrators. However, by their very design, these fabrics wiii oniy stop small penetrators like hypodermic needles and glass shards if the threat hits a guard plate. Multiple layers of this material might improve the chances that a puncture threat hits a plate, but worker comfort and productivity will decrease dramatically as bulk increases. 

The only puncture resistant hand and arm protection with Woven Layered Technology". Our Inherent solid surface design gives you full puncture resistance, and out-performs ceramic coating and guard plate construction. 

---