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PTFE Tape
Thread seal tape (also known as PTFE tape, Teflon tape, or plumber's tape) is a polytetrafluoroethylene (PTFE) film tape commonly used in plumbing for sealing pipe threads. The tape is sold cut to specific widths and wound on a spool, making it easy to wind around pipe threads. Thread seal tape lubricates allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed. The tape also works as a deformable filler and thread lubricant, helping to seal the joint without hardening or making it more difficult to tighten, and instead making it easier to tighten. It also protects the threads of both pieces from direct contact with each other and physical wear, and helps seal and prevent leaks from the connection. Typically the tape is wrapped in the same direction the male threads go for tightening, and commonly used commercially in applications including pressurized water systems, central heating systems, and air compression equipment. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PTFE Tape
Thread seal tape (also known as PTFE tape, Teflon tape, or plumber's tape) is a polytetrafluoroethylene (PTFE) film tape commonly used in plumbing for sealing pipe threads. The tape is sold cut to specific widths and wound on a spool, making it easy to wind around pipe threads. Thread seal tape lubricates allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed. The tape also works as a deformable filler and thread lubricant, helping to seal the joint without hardening or making it more difficult to tighten, and instead making it easier to tighten. It also protects the threads of both pieces from direct contact with each other and physical wear, and helps seal and prevent leaks from the connection. Typically the tape is wrapped in the same direction the male threads go for tightening, and commonly used commercially in applications including pressurized water systems, central heating systems, and air compression equipment. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemours
Chemours (, ) is an American chemical company that was founded in July 2015 as a spin-off from DuPont. It has its corporate headquarters in Wilmington, Delaware, United States. History In October 2013, DuPont announced that it was planning to spin off its " performance chemicals" business into a new publicly traded company in mid-2015. DuPont filed its initial Form 10 with the SEC in December 2014 and announced that the new company would be called "The Chemours Company." The name is a portmanteau of the words chemical and Nemours, a nod to DuPont's full name, E. I. du Pont de Nemours & Co. The company's CC ticker symbol, is also a play on DuPont's DD symbol. The spin-off was completed on July 1, 2015, and Chemours' stock began trading on the New York Stock Exchange on the same date. Chemours has assumed various liabilities arising from lawsuits against DuPont. Additionally, Chemours' plant in Bladen County, North Carolina, was found to be dumping vast quantities of a chemi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Generic Trademark
A generic trademark, also known as a genericized trademark or proprietary eponym, is a trademark or brand name that, because of its popularity or significance, has become the generic term for, or synonymous with, a general class of products or services, usually against the intentions of the trademark's owner. A trademark is said to become ''genericized''—or, informally, to have suffered ''genericide''—when it begins as a distinctive product identifier but changes in meaning to become generic. This typically happens when the products or services which the trademark is associated with have acquired substantial market dominance or mind share, such that the primary meaning of the genericized trademark becomes the product or service itself rather than an indication of source for the product or service. A trademark thus popularised has its legal protection at risk in some countries such as the United States and United Kingdom, as its intellectual property rights in the trademark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teflon
Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. It is one of the best-known and widely applied PFAS. The commonly known brand name of PTFE-based composition is Teflon by Chemours, a spin-off from DuPont, which originally discovered the compound in 1938. Polytetrafluoroethylene is a fluorocarbon solid, as it is a high-molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine. PTFE has one of the lowest coefficients of friction of any solid. Polytetrafluoroethylene is used as a non-stick coating for pans and other cookware. It is non-reactive, partly because of the strength of carbon–fluorine bonds, so it is often used in containers and pipework for reactive and corrosive chemicals. Where used as a lubricant, PT ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosgene
Phosgene is the organic chemical compound with the formula COCl2. It is a toxic, colorless gas; in low concentrations, its musty odor resembles that of freshly cut hay or grass. Phosgene is a valued and important industrial building block, especially for the production of precursors of polyurethanes and polycarbonate plastics. Phosgene is extremely poisonous and was used as a chemical weapon during World War I, where it was responsible for 85,000 deaths. It was a highly potent pulmonary irritant and quickly filled enemy trenches due to it being a heavy gas. It is classified as a Schedule 3 substance under the Chemical Weapons Convention. In addition to its industrial production, small amounts occur from the breakdown and the combustion of organochlorine compounds, such as chloroform. Structure and basic properties Phosgene is a planar molecule as predicted by VSEPR theory. The C=O distance is 1.18 Å, the C−Cl distance is 1.74 Å and the Cl−C−Cl angle is 111 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perfluoroisobutene
Perfluoroisobutene (PFIB) is the perfluorocarbon counterpart of the hydrocarbon isobutene and has the formula (CF3)2C=CF2. An alkene, it is a colorless gas that is notable as a highly toxic perfluoroalkene. Few simple alkenes are as toxic. Safety Perfluoroisobutene is quite toxic with an LCt = 880 mg⋅min⋅m−3 (mice). It is a Schedule 2 substance of the Chemical Weapons Convention. Perfluoroisobutene is highly reactive toward nucleophiles. It hydrolyzes readily to give the relatively innocuous (CF3)2CHCO2H, which readily decarboxylates to give hexafluoropropane. It forms addition compounds with thiols, and it is this reactivity that may be related to its toxicity. PFIB is a product of pyrolysis of polytetrafluoroethylene (PTFE), one of the substances invoked to explain polymer fume fever. External links International Chemical Safety Card 1216 See also *Phosgene Phosgene is the organic chemical compound with the formula COCl2. It is a toxic, colorless gas; in l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve Seat
The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed. The valve seat is a critical component of an engine in that if it is improperly positioned, oriented, or formed during manufacture, valve leakage will occur which will adversely affect the engine compression ratio and therefore the engine efficiency, performance (engine power and engine torque), exhaust emissions, and engine life. Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, and then machining a conical-section surface into the valve seat that will mate with a corresponding conical section of the corresponding valve. Generally two conical-section surfaces, one with a wider cone angle and one with a narrowe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pipe Dope
Pipe dope is any thread lubricant, thread sealing compound, or anaerobic chemical sealant that is used to make a pipe thread joint leak proof and pressure tight. It is also referred to as "thread compound" or "pipe thread sealant." Although common pipe threads are tapered and therefore will achieve an interference fit during proper assembly, machining and finishing variances usually result in a fit that does not result in 100 percent contact between the mating components. The application of pipe dope prior to assembly will fill the minute voids between the threads, thus making the joint pressure tight. Pipe dope also acts as a lubricant and helps prevent seizing of the mating parts, which can later cause difficulty during disassembly. Composition A material safety data sheet reports that the "Permatex" 51D pipe joint compound contains kaolin clay, vegetable oil, rosin, ethanol, etc. The ingredients are designed to: # fill minute spaces between mating pipe fittings (kaolin), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plug (jewelry)
Plug, PLUG, plugs, or plugged may refer to: * Plug (accounting), an unsupported adjustment to an accounting record * Plug (fishing), a family of fishing lures * Plug (horticulture), a planting technique * Plug (jewellery), a type of jewellery worn in stretched piercings * Plug (sanitation), a stopper for a drainage outlet * Butt plug, a sex toy that is inserted into the rectum * Core plug, used to fill the casting holes on engines * Earplug for ear protection * Fusible plug, a safety device in steam boilers * Hair plug, hair that has undergone hair transplantation * Mating plug, secretion used in the mating of some animal species * Plug, a step in the manufacturing process for parts made of carbon-fiber-reinforced polymer * Plug, a type of chewing tobacco made by pressing tobacco with syrup * Plug, the central element of a Plug and feathers, a tool for splitting stone * Plug computer, a type of small-form-factor computer * Portland Linux/Unix Group (PLUG), a group of Linux enthus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stretching (body Piercing)
Stretching, in the context of body piercing, is the deliberate expansion of a healed piercing for the purpose of wearing certain types of jewelry. Ear piercings are the most commonly stretched piercings, with nasal septum piercings, tongue piercings and lip piercings/lip plates following close behind. While all piercings can be stretched to some degree, cartilage piercings are usually more difficult to stretch and more likely to form hypertrophic scars if stretched quickly. Dermal punching is generally the preferred method for accommodating larger jewelry in cartilage piercings. Stretching is usually done in small increments to minimize the potential for damaging the healed fistula or creating scar tissue. In North America, most stretching methods go up by a single even-sized gauge increment at a time. 0g (8 mm), is generally considered to be "the point of no return": a hole larger than this size will rarely close to a standard piercing size. Since each body is different, any ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stretching (body Piercing)
Stretching, in the context of body piercing, is the deliberate expansion of a healed piercing for the purpose of wearing certain types of jewelry. Ear piercings are the most commonly stretched piercings, with nasal septum piercings, tongue piercings and lip piercings/lip plates following close behind. While all piercings can be stretched to some degree, cartilage piercings are usually more difficult to stretch and more likely to form hypertrophic scars if stretched quickly. Dermal punching is generally the preferred method for accommodating larger jewelry in cartilage piercings. Stretching is usually done in small increments to minimize the potential for damaging the healed fistula or creating scar tissue. In North America, most stretching methods go up by a single even-sized gauge increment at a time. 0g (8 mm), is generally considered to be "the point of no return": a hole larger than this size will rarely close to a standard piercing size. Since each body is different, any ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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