Piping design data

Tabulated below are the most generally required data used in piping design. This table is believed to be the most conii)rehensive published uj) to this time. Many thicknesses traditionally included in such tables have been omitted because of their having become obsolete through disuse and lack of coverage by any Standard. 

Ditches must be designed and constructed with sufficient carrying capacity for the anticipated runoff flow. Local contractors experience may be the best source of design data. If needed, porous pipe capacities may be obtained from the manufacturer, and the amount of water a gravel-filled ditch can carry may be estimated as illustrated in the example which follows ... 

Although worldwide production of heat pipes designed for applications involving the thermal control of electronic components or devices was in excess of 1,000,000 per year in 1992, it is difficult to calculate a mean time to failure (MTTF) for heat pipes, thermosyphons, and other similar devices due to the relatively small amount of data that exists on actual products in operation. Experience with a wide variety of applications ranging from consumer electronics to industrial equipment has demonstrated that mechanical cleaning of the case and wick-... 

Grades of PE have been specially developed for the gas pressure pipe market. Eirst-generation HDPEs were not used in the UK. The second generation of MDPE copolymers has superior creep rupture resistance at the pipe design lifetime of 50 years (Fig. 14.5). The data falls on one or more lines lines of shallow slope are associated with ductile failure and lines of steeper slope with brittle plane strain crack growth (Fig. 14.3). The... 

The intent of this book Is to help train, on an accelerated basis, the young engineers and technicians entering the field of process plant layout and piping design. It also updates equipment spacing requirements and addresses the latest feature of elearonic data transfer for the experienced layout designer. 

Preassessment involves the collection of essential data required to conduct the assessment, feasibility determination of ICDA process, and classification of ICDA regions. Data to be collected include pipe operating history, pipe design, features with inclination and elevation data, maximum flow rates, temperature and pressures, corrosion... 

According to the IAEA Research Contract No. 5762/Rl/RB, tow types of devices were developed in the last year that will be used to decontaminate the small items and the internal surface of metal pipe. Necessary data and experiences will be gained with the decontamination experiments. The purpose of the experiments are to demonstrate the feasibility of those devices developed, and to provide designing base for practical devices. 

Analytical models, both simple and complex, would have been utilized to further develop the internally insulated Mi-base superalloy hot leg piping design. These models would have then been qualified with experimental data, as descnbed in Section 9 4.6 3 4... 

By definition, a defect within the pipe is through-wall if the remaining pipe wall thickness at any point is 1 mm or less or if it is expected to be so at the end of the (after repair) extended design life of the pipe. Design of repair then varies based on the defect shape. ISO 24817 has considered three different shapes of defects, which are circular or near circular, axial slots, and circumferential slots. The design for a through-wall defect is experimentally based and requires performance test data. The equations are long and not to be repeated here. As an introduction only, ISO equations for circular or near-circular defects are presented below. 

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