These procedures are appropriate for designing tubes for service in both corrosive and noncorrosive applications. These procedures have been developed specifically for the design of refinery and related fired heater tubes direct-fired, heat-absorbing tubes within enclosures.
These procedures are not intended to be used for the design of external piping. This standard does not give recommendations for tube retirement thickness; Annex A describes a technique for estimating the life remaining for a heater tube. How to Buy To upgrade your document to include the redline version: Add the document to your cart. Select the Upgrade with Redline option in the cart pop up.
These procedures have been developed specifically for designing refinery heater tubes direct fired, heat absorbing tubes within enclosures. These procedures are not intended for the design of external piping. These recommended procedures represent accepted engineering approaches based on present-day knowledge of the subject.
The basis and sources of these procedures, particularly the design equations and stresses, are contained in Sections 2 and 3, respectively. Appendix A describes in detail the sources of the data used to develop the allowable stresses. The derivations of the corrosion fraction and temperature fraction equations are given in Appendix B.
A procedure for calculating the skin temperature of a heater tube is described in Appendix C. Appendix D contains a limit for thermal stresses in heater tubes.
This practice does not include recommendations on tube retirement thickness, but a technique for estimating the life remaining in a heater tube is given in Appendix E. Complementary Documents and Links:. Superseded By: Currently Viewing.
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