BS EN 12953-9:2024 - Page 2

Shell boilers. Requirements for limiting devices of the boiler and accessories | Status: Current

1 Scope This document specifies requirements for limiters which are incorporated into safety systems for shell boilers as specified in EN 12953‑1:2012. The design requirements and examination of the limiters are covered in this document.

NOTE See Annex E for determination of the characteristic data for use in protective circuits with a safety integrity level (SIL) rating. The requirements for limiters with regard to the safety integrity level (SIL), for example, in accordance with EN 61508 are not covered in this document.