ANSI/ASME B16.49 standard covers design,material,manufacturing,testing,marking,and inspection requirements for factory-made pipeline bends of carbon steel materials having controlled chemistry and mechanical properties, produced by the induction bending process,with or without tangents.This standard covers induction bends for transportation and distribution piping applications (e.g., ASME B31.4, B31.8, and B31.11) process and power piping have differing requirements and materials that may not be appropriate for the restrictions and examinations described herein,and therefore are not included in this standard.
The standard includes the content :vScope and Definitions, Pressure Ratings, Size, Marking, Material, Material for Bends Containing Welds, Chemical Composition, Material Properties, Heat Treatment, Qualification Bend, Test Requirements, Dimensional Requirements, Inspection of Production Bends, Certification, Supplementary Requirements .

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ASME-B16.49-Factory-Made-Wrought-Steel-Butt-welding-Induction-Bends-for-Transportation-and-Distribution-Systems.pdf

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https://www.asme.org/products/codes-standards/b1649-2012-factorymade-wrought-steel-buttwelding