ASME STS-1-2021 is a standard published by the American Society of Mechanical Engineers (ASME) that provides guidelines for the design, fabrication, inspection, testing, and documentation of steam turbines.

ASME STS-1-2021 - Standard for Steam Turbines

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2021

Here's a brief overview:

This standard provides requirements for the design, materials, fabrication, inspection, testing, and documentation of steam turbines. It covers turbines used for driving generators, pumps, compressors, and other driven equipment.