Some government depository libraries hold physical copies of ASME PTC standards. You can scan relevant pages for personal reference (copyright allows limited copying for research).
ASME PTC 19.11-2021 provides a detailed framework for the measurement of steam flow using various techniques, including the use of orifice plates, nozzles, and venturi tubes. The standard covers the design, installation, and testing of steam flow measurement devices, as well as the calculation of steam flow rates. asme ptc 1911 pdf free download hot
However, you can access the document legally without paying in some scenarios: Some government depository libraries hold physical copies of