ASME PTB-13:2021 pdf free download

ASME PTB-13:2021 pdf free download Cri teria for Pressure Retaining Metallic Com ponents Using Add itive Manufacturing
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(a)These criteria address the construction of pressure retaining component using the AM Powder BedFusion process using both Laser and Electron Beam energy sources.
(b) Additively Manufactured components shall meet the requirements of the applicable ASME
Construction Code or Standard in addition to these criteria.
(c) Hybrid construction incorporating AM components joined (welded or brazed) to non-AM components
is acceptable. Additive manufactured components joined to other AM components or non-AMcomponents shall follow the requirements of the applicable ASME Construction Code or Standard.
(d) The maximum design temperature shall be at least 50F(25°C)colder than the temperature where time-
dependent material properties begin to govern for the equivalent wrought ASME material specification,as indicated in ASME Section lI, Part D[1].
(e) The materials allowed for use in powder bed fusion under these criteria include:(1) austenitic stainless-steel alloys; and
(2) nonferrous alloys
Commentary
The criteria provided in this Pressure Technology Book(PTB) address the construction of pressure retainingcomponents by means of the AM Powder Bed Fusion process (PBF) using both Laser and Electron Beamenergy sources.
When additively manufacturing components, these criteria are intended to be used with an existing ASMEConstruction Code or Standard. This PTB provides criteria to address the additional information necessaryto supplement construction code requirements for materials, design,fabrication, examination,inspection,testing and quality control. These supplementary criteria are essential for any proposed standard or codeaction for the construction of metallic pressure retaining components using powder bed fusion.
The AM process is not intended for the manufacture of pressure components when traditionalmanufacturing methods will provide a cost and efficiency advantage. AM has advantage in the fabricationof complex components and applications with high-cost materials. AM provides a cost advantage whensubtractive manufacturing processes result in large amounts of material waste. AM also provides scheduleadvantages and improved lead time compared to current forging and casting methods.A market for AM isdeveloping for replacement components in the nuclear industry where the plant operating basis requiresspecific replacement parts. AM provides a manufacturing method to fabricate components to the designcode of record when the original components are no longer available. These initial drivers for AM willrequire the installation of AM components into both existing systems and new construction. The criteriaallow hybrid construction incorporating AM components joined (welded or brazed) to non-AMcomponents.
The ASME AM Special Committee did not investigate data for AM components operating in the materialcreep regime.Creep data were discussed but sufficient material property data was not available to acceptAM components operating at elevated temperature in the scope of the current AM criteria.The maximumdesign temperature is limited to at least 50°F(25°C) colder than the temperature where time-dependentmaterial properties begin to govern for the equivalent wrought ASME material specification, as indicatedby the T-Notes in ASME Section lI, Part D [1].