Lifting Lug Design


This is the documentation page for the Bolted Flange Design module. You'll find here everything you need to understand how to use our application.

1. Notes

Note Description
G1 To these stress values a casting quality factor as specified in PG-25 of Section I, UG-24 of Section VIII, Division 1, or TM-190 of Section XII shall be applied.
G2 These stress values include a joint efficiency factor of 0.60.
G3 These stress values include a joint efficiency factor of 0.85
G4 For Section I applications, these stresses apply when used for boiler, water wall, superheater, and economizer tubes that are enclosed within a setting. A joint efficiency factor of 0.85 is included in values above 450°C.
G5 Due to the relatively low yield strength of these materials, these higher stress values were established at temperatures where the shorttime tensile properties govern to permit the use of these alloys where slightly greater deformation is acceptable. The stress values in this range exceed 662⁄3% but do not exceed 90% of the yield strength at temperature. Use of these stresses may result in dimensional changes due to permanent strain. These stress values are not recommended for the flanges of gasketed joints or other applications where slight amounts of distortion can cause leakage or malfunction. For Section III applications, Table Y-2 lists multiplying factors that, when applied to the yield strength values shown in Table Y-1, will give allowable stress values that will result in lower levels of permanent strain.
G6 Creep-fatigue, thermal ratcheting, and environmental effects are increasingly significant failure modes at temperatures in excess of 825°C and shall be considered in the design.
G9 For Section III applications, the use of these materials shall be limited to materials for tanks covered in Subsections NC and ND, component supports, and for nonpressure-retaining attachments (NC/ND-2190).

Reference top

  • 1. Ditos Kezar Bar (2019) The Author of Best Site Ever, 2 edn., New York City: Kezar Engineering.
  • 2. Autoraula Math (2015) How Can We Know For Sure?, 1 edn., Camboja, BR: Kezar Engineering.
  • 3. Me, Myself (2011) Matematica Básica para Filhos da P*, 3 edn., Rio de Janeiro, RJ, Brasil: Kezar Engineering.