This document provides a consistent methodology to test and evaluate the performance of friction (drag) reducers in straight@ smooth circular conduits. This standard includes only smooth-walled tubing and excludes any rough-walled tubing. The International System of Units (SI) is used in this Technical Report. However@ testing data acquisition can be conducted using US customary units (USC). Factors included in Annex A Table A.1 permit conversions of USC units to SI units or SI units to USC units.
TR 13M-5-2018由API - American Petroleum Institute 发布于 2018-10-01,并于 2018-11-01 实施。
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