It is critical that the proper metal hose assembly is selected for the required application. Many metal hoses look the same, but they are not. Therefore, it is essential that the right questions are asked, and features are considered when it comes to selecting the proper hose assembly.
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The size of the connection in diameter where the assembly is going to be installed is a necessary piece of information to get the proper fit.
When the internal and external temperature to which the metal hose assembly is exposed goes up, the strength of the assembly and components decrease. If the temperature of the environment is unknown, a temperature of 70 degrees Fahrenheit is assumed.
The application is the configuration that the metal hose assembly is installed. The application includes the dimensions where the assembly must fit. Any movement that the assembly is going to experience also matters. If you do not know this, the correct hose type or length cannot be chosen.
When discussing media, it refers to any chemicals the inside or outside of the hose may be exposed to. Therefore, knowing the type of media is important to ensure that the hose assembly is compatible with all of these chemicals.
According to Precision Hose, a hose should be subjected to maximum pressure during testing because corrugation deformation occurs when the maximum pressure is exceeded. To determine the maximum rated test pressure, the maximum rated working pressure is multiplied by 150%.
It is essential that the fittings that will be needed are identified. This is critical to ensure that the end connections of the metal hose assembly where it fits into will be able to match up.
This refers to the speed at which the media will move through the metal hose assembly. If it has a high flow or abrasive material, it may cause failure.
When determining the appropriate metal hose assembly, it is critical that you know the answers to these questions to select the best assembly for your needs. Because all applications are different, considering type, size, alloy, length, and other factors is critical. These considerations must be for the entire configuration, such as hose and assembly components or expansion joints. If you need any assistance selecting the right metal hose assembly, call us today.
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The selection of the correct metal hose is critical to insure optimum field performance. To accomplish this, there are a number of important applications requirements that must be known. The guide below will help you identify the requirements, and design the most cost effective, engineering sound product. The word “STAMPED” is useful as a checklist of applications requirements to be considered.
Check for size of existing piping, mating fittings and flow requirements.
Check for maximum service temperature of the application, maximum allowable service temperature rating for hose and fitting alloys and reduced operating pressures at elevated temperatures.
Check for corrosion resistance of hose and fittings alloys for the media conveyed. Also check for maximum service temperature and pressure for the alloy selected.
Type of motion: angular, axial, offset, radial, random, vibration, amount and frequency. Hose type best suited for application and motion, including external durability requirements. Also check for cycle life requirement.
Check for burst, test and operating pressure. Constant, pulsating or shock pressures and operating pressure at elevated temperature. Consider braid selection to maximize pressure/minimize cost.
Check for methods of attachment applicable to type and alloy of hose and fittings. Maximum temperature for alloys and methods of attachment.
Check for minimum hose live length for type of motion and the hose assembly length with fittings (overall length).
NOTICE: This Engineering Guide is to assist you in the selection and application of flexible metal hose for your particular requirements. The information and data contained in this Engineering Guide are the result of years of our experience and research in flexible metal hose. As such it is the best information and data available to us as of the date of publication. Progress is part of any dynamic program of research and development, such as the company sponsors, so that all information and data contained herein are subject to change (without notice) at any time. Should you be unable to determine a specification for a particular application, we solicit receiving details describing the application so that we may make a recommendation. Because we do not supervise or control the installation and use our products, we cannot be responsible for their performance or the improper application and usage of the data.
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