GB/T 41261-2022 Management of alarms systems for the process industries

Scope

This document specifies the general principles and processes for the life cycle management of alarm systems in process industry facilities, which are based on programmable electronic controllers and computer-based human-machine interfaces (HMI) technology. It covers all alarms issued to operators, including those from basic process control systems, alarm panels, safety instrumented systems, fire and gas systems, and emergency response systems.
The practices described in this document are applicable to continuous, batch, and discrete processes.
There may be variations in the implementation of this document to meet the specific needs of different process operations.
In addition to the requirements of this document, government-defined process safety design, process safety management, or other requirements (e.g., those of national, provincial, municipal, or autonomous regions) should also be followed.
The main function of the alarm system is to notify operators of abnormal operating conditions or equipment failures and support their responses. The alarm system involves both basic process control systems (BPCS) and safety instrumented systems (SIS), each of which generates alarms based on process condition measurements and logic. Figure 1 shows the concept of the alarm and response data flow in the alarm system. The alarm system also includes a mechanism for issuing alarm information to operators through human-machine interfaces, typically computer screens or signal panels (lighted signs). Additional functions of the alarm system include alarm and event logs, alarm history records, and the generation of performance indicators for the alarm system. Other external systems can also use data from the alarm system.

Development Information

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