Biggest CPVC Pipe Yet.The world's largest-diameter CPVC CPVC Chlorinated Polyvinyl Chloride CPVC Cell Phone Voice Changer CPVC common pulmonary venous chamber pipe has been commercially extruded for about a year by Harvel Plastics Inc. in Easton, Pa. The 14- and 16-in. pipes have walls 0.75-in. and 0.843-in. thick, respectively. They are aimed at conveying hot, corrosive corrosive /cor·ro·sive/ (kor-o´siv) producing gradual destruction, as of a metal by electrochemical reaction or of the tissues by the action of a strong acid or alkali; an agent that so acts. solutions in paper and chemical processing plants. The challenge in making the bigger pipes isn't the diameter but the mass of resin present. Harvel has made a 24-in. CPVC duct for 10 years, but the duct is only 0.25-in. thick. The problem was to design a die that could extrude extrude /ex·trude/ (ek-strldbomacd´) 1. to force out, or to occupy a position distal to that normally occupied. 2. in dentistry, to occupy a position occlusal to that normally occupied. thick CPVC pipe without burning or degrading TO DEGRADE, DEGRADING. To, sink or lower a person in the estimation of the public. 2. As a man's character is of great importance to him, and it is his interest to retain the good opinion of all mankind, when he is a witness, he cannot be compelled to disclose the material, Harvel says. The solution resulted from a six-year development program with BFGoodrich Performance Materials in Cleveland, using Goodrich's Corzan CPVC resin. The resin and the Corzan branded CPVC pipe program were part of a spinoff last February of BFGoodrich Performance Materials to a new holding company, PMD (Polarization Mode Dispersion) The type of dispersion that occurs in singlemode fiber due to a lack of perfect symmetry in the fiber and from external pressures on the cable. Light travels over singlemode fiber in two polarization states. Group. A second pipe extruder, Ipex Inc. in Charlotte, N.C., also commercialized 14- and 16-in. Corzan CPVC pipe this spring. |
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