Search results
Results from the WOW.Com Content Network
CPVC sprinkler pipe inside a firestop mock-up. Chlorinated polyvinyl chloride (CPVC) is a thermoplastic produced by chlorination of polyvinyl chloride (PVC) resin. CPVC is significantly more flexible than PVC, and can also withstand higher temperatures. Uses include hot and cold water delivery pipes and industrial liquid handling.
Chlorinated polyvinyl chloride (CPVC) is produced through exposing PVC to the continued free-radical chlorination reaction that originally formulates the PVC polymer. The chlorination reaction continues to add chlorine atoms to the polymer hydrocarbon backbone until most commercial applications reach a percent range between 56 and 74% total ...
Most long-distance refrigerated transport by truck is done in articulated trucks pulling refrigerated hardside (box) semi-trailers, although insulated curtainsiders are common in some countries. Occasionally, refrigerated trailers have been used as temporary morgues, [ 1 ] and second-hand refrigerated trailers are frequently sold for use in ...
The container is cooled for as long as there is frozen gas available in the system. These have been used in railcars for many years, providing up to 17 days temperature regulation. [ 4 ] Whilst refrigerated containers are not common for air transport, total loss dry ice systems are usually used. [ 3 ]
In a fire, PVC can form hydrogen chloride fumes; the chlorine serves to scavenge free radicals, making PVC-coated wires fire retardant. While hydrogen chloride fumes can also pose a health hazard in their own right, it dissolves in moisture and breaks down onto surfaces, particularly in areas where the air is cool enough to breathe, so would ...
Polymer degradation is the reduction in the physical properties of a polymer, such as strength, caused by changes in its chemical composition.Polymers and particularly plastics are subject to degradation at all stages of their product life cycle, including during their initial processing, use, disposal into the environment and recycling. [1]
Refueling and Complex Overhaul (RCOH) is a process for refueling and upgrading nuclear-powered aircraft carriers in the US Navy. The nuclear reactors that power some aircraft carriers typically use up their nuclear fuel about halfway through their desired 50-year life spans. Because carriers can last so long before being retired, they are ...
List of aircraft carriers of the United States Navy Hull no. Name Image Class Commissioned Decommissioned Service life Status Ref. CV-1 Langley: Langley : 20 March 1922 27 February 1942 19 years, 344 days Sunk near Cilacap, Java in 1942 [13] [14] [15] CV-2 Lexington: Lexington (lead ship) 14 December 1927 8 May 1942 14 years, 145 days