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== Materials selection == | == Materials selection == | ||
API ''Spec. 11AX'' was modified to add not only new sizes and types of pumps with new quality, inspection, and tolerance requirements, but also standardized, widely used pump-component materials. Various material descriptions, their API identification symbol, surface condition, base core hardness, base material, and base-material minimum yield strength for plated barrels, are shown in Table A of ''Spec. 11AX''. Similar tables in ''Spec. 11AX'' (B through I) are incorporated for case-hardened barrels, nonhardened barrels, balls and seats, cages, pull tubes, valve rods, fittings, seating cups, spray-metal plungers, and plated plungers. These changes have incorporated the prior information in API ''RP 11AR''<ref name="r2" /> and the NACE International ''MR 01-76''<ref name="r3" /> for materials to be used in most production environments. | API ''Spec. 11AX'' was modified to add not only new sizes and types of pumps with new quality, inspection, and tolerance requirements, but also standardized, widely used pump-component materials. Various material descriptions, their API identification symbol, surface condition, base core hardness, base material, and base-material minimum [[Glossary:Yield strength|yield strength]] for plated barrels, are shown in Table A of ''Spec. 11AX''. Similar tables in ''Spec. 11AX'' (B through I) are incorporated for case-hardened barrels, nonhardened barrels, balls and seats, cages, pull tubes, valve rods, fittings, seating cups, spray-metal plungers, and plated plungers. These changes have incorporated the prior information in API ''RP 11AR''<ref name="r2" /> and the NACE International ''MR 01-76''<ref name="r3" /> for materials to be used in most production environments. | ||
=== Allowable setting depth === | === Allowable setting depth === | ||
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