Rubber hoses

Shipment, Storage, and Price. Butynediol, 35% solution, is available in tank cars, tank trailers, and dmms. Stainless steel, nickel, aluminum, glass, and various plastic and epoxy or phenoHc liners have ak been found satisfactory. Rubber hose is suitable for transferring. The solution is nonflammable and freezes at about —5°C. 

Shipment, Stora.ge, ndPrice. l-Methyl-2-pyrrohdinone is available in tank cars or tank trailers as well as in dmms. Shipping containers are normally of unlined steel. Rubber hose is unsuitable for handling standard steel pipe or braided steel hose is acceptable. Ordinarily 1020 carbon steel (0550) is satisfactory as a storage material. Stainless-steel 304 and 316, nickel, and aluminum are also suitable. MethylpyrroHdinone is hygroscopic and must be protected from atmospheric moisture. In September 1994, NMP was Hsted at 3.89/kg. 

The twisting rubber hoses or o ringed elbows which connect the rotating pan necks with pipe and the wear plate to the face of the stationary valve The condition of the high impact nozzles mounted on the cloth wash manifold and, for wet cake discharge, the sluicing manifold The support rollers which take the vertical load of the entire machine and the horizontal thrust rolls that maintain the rotating frame concentric The toothed rim and sprocket which drives the pan filter... 

A powder was emptied down a metal duct into a plant vessel. The duct was replaced by a rubber hose, as shown in Figure 15-2. The flow of powder down the hose caused a charge to collect on it. Although the hose was reinforced with metal wire and was therefore conducting, it was connected to the plant at each end by short polypropylene pipes that were nonconducting. A charge therefore accumulated on the hose, a spark occurred, the dust exploded, and a man was killed. 

Rubber Hose Reinforced with Metal Wire... 

Flexible pipes Roughness varies considerably with conshuction. Smooth rubber hose corresponds approximately with steel pipe. Head loss when curved can be 30% higher than when straight... 

Synthetic rubber hoses will deteriorate from aging. A cure date is used to ensure that they do not deteriorate beyond material and performance specifications. The cure date is the quarter and year the hose was manufactured. For example, 1Q89 or i means the hose was made during... 

There are temperature restrictions applied to the use of hoses. Rubber hose must not be used where the operating temperature exceeds 200°F. PTFE hoses in high-pressure air systems must not be used where the temperature exceeds 350°F. 

Water and brine pumps may be isolated with flexible connectors. For small-bore pipes, these can be ordinary reinforced rubber hose, suitably fastened at each end. For larger pipes, corrugated or bellows connectors of various types can be obtained. In all cases, the main pipe must be securely fixed close to the connector, so that the latter absorbs all the vibration. Flexible connectors for the refrigerant usually take the form of corrugated metal hose, wrapped and braided. They should be placed as close to the compressor as possible. 

The most recent major expln in a US TNT plant occurred in May 1974 at the Radford Army Ammunition Plant. The accident completely destroyed one of the three continuous nitration lines at the plant. According to the AMC News, Sept 1974, the investigation board reported that an operator inadvertently introduced a 5 to 6-foot rubber hose to clean out unwanted material that had collected in a transfer line leading to the nitrator, when the hose was pulled from his hands into the nitrator. This resulted in a rapid temp rise and subsequent explosion. The hose was commonly used in this manner . The material causing the blockage in the transfer line was believed to be an oxidation product of TNT, 2,2 -dicarboxy-3,3, 5,5,-tetra-nitroazoxybenzene, also referred to as White Compound. The introduction of the rubber hose caused a rapid, exothermic oxidation reaction between the hose material and the mixed acid present. The heat generated by this reaction caused a local acceleration of the normal nitration/oxidation reactions which occur in the nitrator until a critical temp was reached, at which point rapid oxidation of DNT/TNT proceeded as a runaway reaction, igniting the material present in the vessel. 

According to the AMC News article authorities summed up the report by pointing out that the incident was not the direct result of normal operations, but rather was the result of an unusual condition, and that the design and operating procedures were not unsafe when considered in the context of the total hazardous environment. The process in the nitration and purification building was operating normally when the rubber hose was introduced into the system. 

Low acute amphetamine doses enhance pain-induced aggressive/defensive reactions in mice, rats, and squirrel monkeys (Kostowski 1966 Hoffmeister and Wuttke 1969 Crowley 1972 Powell et al. 1973 Emley and Hutchinson 1972 Emley and Hutchinson 1983). For example, squirrel monkeys subjected to electric shocks to their tails, bite a rubber hose more frequently after being administered amphetamine (0.06 to 1.0 mg/kg, SC) (Emley and Hutchinson 1972 Emley and Hutchinson 1983 Hutchinson et al. 1977). In rats, these pain-induced aggressive/defensive responses increase with doses of 0.1 to 1.0 mg/kg (Crowley 1972). 

The performance of such a probe can be demonstrated for polymer studies by heating a phantom sample up to 460 °C. The sample was made from a PTFE plug, two pieces of a PVC hose and a silicon rubber hose. The deformation and the... 

Fig. 2.1.7 Effect of high temperatures on a composite polymer phantom made from a polyethylene plug (white), a PVC hose (transparent) and a silicon rubber hose (yellow) shown at room temperature (left) and after...

Water enters a horizontal tube through a flexible vertical rubber hose that can support no forces. If the tube is 1/8 in. sch. 40, 10 ft long, and the water flow rate is 2 gpm, what force (magnitude and direction) must be applied to the tube to keep it stationary Neglect the weight of the tube and the water in it. The hose ID is the same as that of the tube. 

A backyard barbeque grill contains a 20-lb tank of propane. The propane leaves the tank through a valve and regulator and is fed through a 1/2-in rubber hose to a dual valve assembly. After the valves the propane flows through a dual set of ejectors where it is mixed with air. The propane-air mixture then arrives at the burner assembly, where it is burned. Describe the possible propane release incidents for this equipment. 

In building B-46, three separate operations are performed consolidation, demachlnlng, and cone swagglng. A rotary press Is used to consolidate A-5 explosive Into a grenade. To pick up the dust from this pressing operation, flexible rubber hoses (2.0 in.) are used. These lines are then connected to a stainless steel line that runs Into a wet collector. 

Hard rubber hose is preferred over collapsible fabric hose for process area hose reels and for preference of immediate availability. The rubber hose should not be allowed to be stored or exposed to direct sunlight for any considerable time period. 

Where facilities are exposed to the constant radiation of the sun, sun shades are provided over exterior exposed equipment that may not function properly at elevated temperatures or would deteriorate rapidly if left continual exposed to the direct sunlight. Most electrical or electronic equipment is rated for a maximum operating temperature of 40 °C (104 °F) unless otherwise specified, e.g., hazardous area lighting temperatures are normally specified for 40 °C (104 °F) limit. Of particular concern for fire protection systems are those containing storage for foam concentrates rubber hoses or other rubber components which may dry and crack. 

All required materials for a PSI system are easily accessible a flask with two ground glass joints (or one joint and an arm), rubber septum, rubber hose, a short length of PEEK tubing ( 0.5 m), a PEEK chromatography fitting (nut and ferrule) and a source of... 

Wheeled fire extinguishers containing a 3% AFFF foam-water solution are intended for applying foam on small flammable-liquid spill fires where manpower is limited. They can be moved from one area to another and can be operated by one person. AFFF solution should be applied by means of a 1 in (2.5 cm) hard rubber hose, 15 ft (4.5 m) long, connected to the tank. 

The extrusion process takes unvulcanized rubber and forces it trough a die, which results in long lengths of rubber of a dehnite cross-section. There are two general subdivisions of this technique one extrudes simple products and the other builds products by extruding the mbber onto metal or fabric reinforcement. Products from these techniques include tire tread, cable coating, and rubber hose. 

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