API 610 Baseplate And Nozzle Loading Criteria

Abstract

The baseplate and nozzle loading criteria in the December 1985 draft version of API610 7th Edition is substantially different from the criteria found in the 6th Edition. The optional heavy duty baseplate criterion has been eliminated, an ungrouted baseplate stiffness criterion has been added so that designs can be easily verified by a relatively inexpensive test in the manufacturer’s shop, and Appendix C, Effect of External Nozzle Forces and Moments on Piping Design, has been retitled and rewritten. These changes and others have been made to clarify the intent of the document, and to make the design criteria both achievable for the manufacturer and enforceable by the purchaser. Shortcomings found in sub-sections 2.4, 3.3.1, and Appendix C of the 6th Edition are discussed as is the corresponding modified text found in the proposed 7th Edition of API 610 Standard. Results are provided of grouted and ungrouted pump-baseplate stiffness tests. An evaluation chart and baseplate checklist are also included.