: Ensuring equipment operates within safe structural limits.
API RP 551 is often used along with other industry standards and guidance, such as: api rp 551 pdf
stands for the American Petroleum Institute Recommended Practice 551: Process Measurement . Unlike a standard (which uses "shall" for mandatory requirements), a Recommended Practice (RP) uses "should" to denote industry-best practices that are highly advisable but not universally mandatory. : Ensuring equipment operates within safe structural limits