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Power piping: the complete guide to asme b31.1.pdf




power piping: the complete guide to asme b31.1.pdf

The hose stations on any given floor should be fed from above to avoid creating a series of torqueflite serial number guide unvented high points.
However, where this information is not available, the preliminary design should include a minimum of five diameters of straight pipe upstream of all check valves.The radiant heat could have an adverse effect on the cables.Steam piping should exit the rack with a vertical up-and over to avoid condensate collection points, while water piping should exit the rack with a vertical down-and-under to avoid a high-point air pocket collection point.While providing benefits in producing the piping drawings (e.g., drafting quality, drafting productivity) and possibly in generating bills of materials, it offers little in the way of improving design productivity.With this knowledge the designer is required to develop the P ID and arrange connections and branches as required to best suit the process to actual physical design.Individual service branches should be taken off the top of the headers.The suction of any centrifugal pump must be continuously flooded, and the suction piping shall contain no vertical loops or air pockets.A safety valve inlet connection in a high-velocity steam line should be located at least 8 to 10 nominal header diameters downstream of any bend in the header, to minimize the possibility of acoustically induced vibrations.It provides the most complete coverage of the Code that is available today and is packed with additional information useful to those responsible for the design and mechanical integrity of process piping. .When routing piping at pumps, the designer should follow the manufacturers recommendations, the Hydraulic Institute Standards, and the following guidelines: The suction and discharge piping must be supported independently of the pump such that very little load is transmitted to the pump casing.Most recently, Jim co-authored chapters in the asme Boiler and Pressure Vessel Companion Guide, 5th Edition, covering the asme B31.1 Power Piping Code and the B31.3 Process Piping Code.Extraction steam piping should be sloped down a minimum of in/ft (10 mm/m in the direction of flow.In the minds of many people, CADand its related acronyms are still envisioned as simply automated drafting, where CAD is basically the substitution of drawing boards with CAD terminals.He has over 40 years of professional experience in the design and analysis of industrial process and energy-related structures, equipment, piping, pipelines, and supports.These drains should be collected into a common, closed drainage system and routed to a point where the drain can safely blow to atmosphere.The cavitation alone can result in severe erosion of the impeller.
Pipe Racks Pipe racks are structures designed and built specifically to support multiple pipes where adequate structure is not available.
He earned his Associate of Science degree from the University of the State of New York.
Valves in overhead piping with their stems in the horizontal position should be located such that the bottom of the handwheel is not more than.5 ft (2 m) above the floor or platform.
A minimum of 3 diameters of straight pipe is required at the pump suction.
Civil structural problems can occur when the sump size and location are not evaluated prior to determining a final sump location.
However, maintenance may require additional space for dismantling the component, as noted elsewhere in this chapter.General Arrangements or Equipment Location Drawings.Figure: Area piping composite.Floor and Equipment Drains Floor and equipment drains in process plants are actually a process system and should be considered in the overall equipment layout design process.Heater level control valves should be located as close as possible to the receiving vessel, with consideration for ease of access and maintenance.In the absence of piping applications software, the designer would be required to key in a significant amount of data while generating the drawing.Drain piping from feedwater heaters without an internal drains cooler must immediately drop vertically to provide as much static head as possible upstream of the heater level control valve.When the manifold or header is larger than the pump suction size, the manifold or header should be made up of full-sized tees and eccentric reducers, flat side.One of the most important lessons learned from the application of CAD to piping layout, particularly the use of 3D modeling, is that design firms are no longer tied to the same design process and design documentation as when the design was performed manually.Applications software, specifically aimed at piping design, is required to realize gains in design productivity.Where possible, pipes should rest directly on the rack with the use of an insulation, if required.Provide a minimum of five diameters of straight pipe downstream of all bleeder trip valves.Use of Standard Hardware.


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