Specifications hoses

Although the rotary hose is not a rotating element, it is mentioned here due to its connection with the swivel. It is used as the flexible connector between the top of the standpipe and the swivel, and allows for vertical travel of the swivel and block (Figure 4-89). It is usually 45 ft or longer. Rotary hose specifications are provided in API Specification 7 [13]. Each hose assembly is... 

Hose specifications need to be based upon a number of requirements. Some hose criteria include size, delivery temperature, maximum pressure, chemical properties of the fluid, hose material, and end fittings. The major components of a chemical hose are the end fittings, an inner core, pressure/vacuum reinforcement, and the protective outer cover. The exact selection of hoses is beyond the scope of this text. [11]... 

Stress cracking is the main reason that high pressure overbraided hoses fail. The variables include mechanical stress at fittings, the type of chemical environment, process variables and the polymer type. A number of industrial and military aerospace specifications have addressed themselves to the questions of testing and requirements of pressure hoses. An example is MIL-H-25579, which is used by the United States Air Force for military aircraft hose specification. The types of measurements required by such specifications are lengthy and time consuming. There are a number of rapid tests which simplify the task of assessment of hose quality. 

Hose specifications need to be based upon a number of requirements. Some hose criteria include size, delivery temperature, maximum pressure, chemical properties of... 

Next you will need about 6 of 3/4 I,D. hose suitable for vacuum use. A normal pressure hose will not work because it s outer wall will not stand up to the outside pressure without collapsing. There were 2 options I came up with for this application. One was to use a hose specifically made to withstand high vacuum. This type hose has a very thick outer wall, but it is expensive. Grainger Industrial supply sells it. See sources section at the back of the book for more information about Grainger. 

Economics and price of the final article often dictate a specific type of mbber that can be used. The expected usable life for the product is controlled by many factors including end customer awareness, competitive situation in the marketplace, safety, reUabiUty, and other factors. Rubber is almost always used as a functional part of another system. For example tires, hoses, belts, O-rings, and numerous mbber components are used in manufacturing automobiles and tmcks. The overall life of the vehicle as well as its performance level often control or direcdy relate to the service life or quaUty level of the mbber parts. 

Environmental Enclosures Enclosures for valve accessories are sometimes required to provide protection from specific environmental conditions. The National Electrical Manufacturers Association (NEMA) provides descriptions and test methods for equipment used in specific environmental conditions in NEMA 250. Protection against rain, windblown dust, hose-directed water, and external ice formation are examples of environmental conditions that are covered by NEMA standards. 

Ixt .s talk about the pump efficiency. Imagine a small pump connected to a garden hose squirting a stream of water across the lawn. You could direct the How from the ho.se up into the air at about a 45-degree angle, and the stream would arc upward and attain its best distance of reach from the nozzle or launch point. The stream of water would attain a specific height into the air and a specific distance. The efficiency curve of a pump is seen as the trajectory or arc of a stream of water. When squirted from a hose, the elevation that attains the be.st distance, when plotted onto the pump curve, is called the best efficiency point (RHP). On the pump curve, it is seen as in Figure 7. ... 

Auto uses are said to account for about one-third of the 30000 tonnes of silicone rubber consumed annually around the world (in turn about 10% of total silicone consumption). Specific uses include shaft sealing rings, spark plug caps, O-rings (the major market for the fluorosilicones), gaskets, coolant and heater hoses for buses and trucks, and ignition cables. 

Rotary hose external connections (i.e., the connection to the swivel gooseneck) are threaded with line-pipe thread as specified in API Specification 5B [14]. 

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... 

Some type of connector or fitting must be provided to attach the lines to the components of the system and to connect sections of line to each other. There are many different types of connectors and fittings provided for this purpose. The type of connector or fitting required for a specific system depends on several factors. One determining factor is the type of fluid line (pipe, tubing or flexible hose) used in the system. Other determing factors are the type of fluid medium and maximum operating... 

In all space heating boiler systems there is a tendency to keep water treatment programs as simple as possible. Ideally, chemical inhibitors should be added in proportion to MU demands, metered water consumption, oxygen content, or other preemptive measurement. More typically, the standard process is to periodically (weekly to monthly) analyze the BW for a few basic control parameters, including measuring the multimetal corrosion inhibitor reserve, and then to merely top-up the inhibitor when the reserve is below the minimum specification. Chemical treatment often is added directly to the BW by hand-pump via a hose cock (bib cock) connection. 

Though short fiber-reinforced mbber composites find application in hose, belt, tires, and automotives [57,98,133,164] recent attention has been focused on the suitability of such composites in high-performance applications. One of the most important recent applications of short fiber-mbber composite is as thermal insulators where the material will protect the metallic casing by undergoing a process called ablation, which is described in a broad sense as the sacrificial removal of material to protect stmcrnres subjected to high rates of heat transfer [190]. Fiber-reinforced polymer composites are potential ablative materials because of their high specific heat, low thermal conductivity, and ability of the fiber to retain the char formed during ablation [191-194]. 

Hose Reels and Hydrant Hoses Can be used to provide coverage to several hazards and then directed to specific incident occurring. Requires operator attendance for manual startup. 

Viton hoses were instead selected for the feed brine to the electrolysis cells. These are chemically resistant to chlorine-containing brine. There are several specifications of Viton hose available. For working with brine in an electrolysis environment, special attention had to be given to rupture resistance of the hoses with respect to operator safety. 

Does the hose conform to TFI-RMA specifications for anhydrous ammonia ... 

ISO 8829 1990 Aerospace - Polytetrafluoroethylene (PTFE) hose assemblies - Test methods ISO 8913 1994 Aerospace - Lightweight polytetrafluoroethylene (PTFE) hose assemblies, classification 204 degrees C/21000 kPa - Procurement specification ISO 9528 1994 Aerospace - Standard-weight polytetrafluoroethylene (PTFE) hose assemblies, classification 204 degrees C/21000 kPa - Procurement specification ISO 9938 1994 Aerospace - Polytetrafluoroethylene (PTFE) hose assemblies, classification 204 degrees C/28 000 kPa- Procurement specification ISO 10502 1992 Aerospace - Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 degrees C and 10 500 kPa - Procurement specification ISO 13000-1 1997 Plastics - Polytetrafluoroethylene (PTFE) semi-finished products -Part 1 Requirements and designation... 

Dubois et al. developed the Description, Acquisition, Retrieval, Computer-aided design-Elucidation by Progressive Intersection of Ordered Structures (DARC-EPIOS) system for structural elucidation.Their approach was based on C spectra. These were predicted using an additive method, but based on their DARC descriptor of environment, as opposed to the more common HOSE code. The EPIOS system was designed to take account of the diagnostic (or not) nature of the C spectrum with respect to environment, i.e., depending on the specific sub-structures. 

The use of steam at 100°C or above would provide an accelerating effect, although this would probably be considered too severe for most applications. Such a test would, however, be relevant for a product such as hose intended for use with steam and the particular test procedure would be found in the product specification. In designing any tests for exposure to steam it is necessary to control the amount of air (if any) present since oxygen at the temperatures used would have a strong deteriorating action. 

Like dispensing hoses, nozzles must be made specifically for methanol fuel. Gasoline nozzles usually contain aluminum parts and elastomers that are not compatible with methanol. Most gasoline nozzles will function for a time, but even when they are working, they are putting corrosion products directly into the vehicle. Emco-Wheaton makes a dispensing nozzle compatible with methanol and configured for vapor recovery systems. 

The system was not specifically designed for MCS and thus needs to gas out for quite a long time. The hose especially takes a while, but with patience it can be gassed out quite well. 

---