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WRC 546

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WRC 546 Guidelines for the Approval of New Materials in WRC Bulletin 541, API Std 530, and API 579-1/ASME FFS-1

Bulletin / Circular by Welding Research Council, 2020

M. Prager, N.G. Sutton, R. Patadia, B. Macejko, P.E., P. Prueter, P.E., D.A. Osage, ASME Fellow, P.E.

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API Std 530 Calculation of Heater-tube Thickness in Petroleum Refineries specifies the requirements andgives recommendations for the procedures and design criteria used for calculating the required wallthickness of new tubes and associated component fittings for fired heaters for the petroleum, petrochemical,and natural gas industries. A key element in the design procedures are material strength parameters andphysical properties. The required strength parameters include yield and tensile strength as a function oftemperature and the time-dependent properties (i.e., creep regime) include the creep rupture strength. Theneed for new materials for fired heater tubes is being driven by higher pressures and temperatures toincrease production yields, and the need for enhanced creep strength and increased corrosion resistanceto extend unit operation. This Bulletin defines the requirements to add new materials to API Standard 530.As API Std 530 references material properties and high temperature data from WRC Bulletin 541, thisBulletin also serves to provide guidelines for the incorporation of new materials into WRC Bulletin 541.These requirements include mechanical and physical property testing requirements, along withcompositional, metallurgical, and welding requirements as well as justification for these requirements.Temperature intervals and the minimum number of heats for testing are specified for both time-independentand time-dependent mechanical properties, as well as for physical properties. Similarly, data requirementsfor the testing of welds consisting of new base materials are defined. The final section of this Bulletindescribes additional data requirements for inclusion of materials (and welded joints) into API 579-1/ASMEFFS-1 Part 10, on top of the basic requirements for inclusion of the material into API Std 530.