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Download PDF by Glynn E. Woods and Roy B. Baguley: CASTI Guide to Asme B31.3 - Process Piping

By Glynn E. Woods and Roy B. Baguley

ISBN-10: 1894038320

ISBN-13: 9781894038324

This newly up-to-date Guidebook describes new additions and revisions to the Code ideas whereas delivering perception into the reasoning in the back of those adjustments within the Code. It offers complete insurance of B31.3 Code specifications for layout, research, fabrication, meeting, errection, inspection, exam, and trying out of approach piping. The specified details on Code necessities offers readability, even to the skilled Code user...

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Additional resources for CASTI Guide to Asme B31.3 - Process Piping

Example text

Considering that the percent replaced area is only 53%, a reinforcing pad must be added to the intersection and area replacement calculations are repeated as follows in Example B. Had the replacement percent in example A been very near the 100% required, more weld metal could have possibly been added to attain the required 100%. The retest with the pad in Example B yields 254% replaced area. The Code requirements for pressure design of the intersection are therefore satisfied. 10 Branch connections.

Percent area replaced = (A5/A1) x 100 = 53% Example A intersection is not suitable for pressure design. Considering that the percent replaced area is only 53%, a reinforcing pad must be added to the intersection and area replacement calculations are repeated as follows in Example B. Had the replacement percent in example A been very near the 100% required, more weld metal could have possibly been added to attain the required 100%. The retest with the pad in Example B yields 254% replaced area. The Code requirements for pressure design of the intersection are therefore satisfied.

L = total length of the pipe, inches. P = external design pressure, psi. Pa = calculated value of maximum allowable external working pressure for the assumed value of "t," psi. t = minimum required thickness of pipe, inches. Procedure: Assume a value for t and determine the ratios L/Do and Do/t. 1. Enter Fig. 6 top) at the value of L/Do. For values of L/Do greater than 50, enter the chart at a value of L/Do = 50. 05 2. Move vertically to the graphed line on the Do/t graph for the value of L/Do determined in (1).

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CASTI Guide to Asme B31.3 - Process Piping by Glynn E. Woods and Roy B. Baguley


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