GB/T 41257-2022 in English
VALIDFunctional safety requirements for digital factory
- Issued on:2022-03-09
- Implemented on:2022-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
| Standard No: | GB/T 41257-2022 |
| Document status: | VALID |
| Title in English: | Functional safety requirements for digital factory |
| Title in Chinese: | 数字化车间功能安全要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2022-03-09 |
| Implemented on: | 2022-10-01 |
| ICS Classification: | 25.040-Industrial automation systems |
| Chinese Classification: | N10-Industrial automation and control device in general |
| Professional Classification: | GB-National Standard |
| Related Topics: | Digitizing
workshop chemical functionalization functional compound functional compound Compound function "Digitizing Cyclization function Digital workshop GBT41257 GB/T 41257-2022 Functional safety quantification Instrument assembly workshop requirements gb/t 41257-2022 |
《GB/T 41257-2022数字化车间功能安全要求》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC10（全国工业过程测量控制和自动化标准化技术委员会系统及功能安全分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core framework of the standard
GB/T41257-2022 standard builds a three-layer protection system for the functional safety of digital workshops: basic layer (physical equipment), control layer (E/E/PE system) and execution layer (MES system). The standard first proposed the concept of functional safety cyber-physical system, and realized dynamic safety protection through the deep integration of safety-related systems and information systems.
Safety lifecycle management requirements
| Phase | Core activities | Output requirements |
|---|---|---|
| Hazard identification | Identification of 12 types of hazards such as equipment interconnection risks and human error | List of hazardous events (including occurrence conditions) |
| Risk assessment | Consequence severity × probability matrix analysis | Risk level map (digital archiving required) |
| Protection layer design | SIL/PL level allocation, independence verification | Safety function specification (including response time) |
Key points for SIL level implementation
The standard stipulates that E/E/PE safety-related systems need to select evaluation indicators based on the operating mode:
- Low demand mode: PFDavg (failure probability on demand), such as SIL3 corresponds to 10-4~10-3
- Continuous mode: PFH (failure rate per hour), such as SIL2 corresponds to 10-7~10-6
The mechanical field needs to simultaneously refer to the PL-SIL conversion relationship in Appendix B, such as PL=e level is equivalent to SIL3.
Functional safety management information system
Chapter 9 of the standard requires the establishment of an information system with three core functions:
- Real-time collection of DC, MTTFD and other parameters of safety instruments
- Visual display of protection layer status and residual risk
- Automatically trigger maintenance work orders (when SIL is downgraded)
Typical implementation cases
An automobile welding workshop:
- Identify the extrusion risk (SIL2) of the robot collaboration area
- Configure independent safety light curtains (PL=d)
- Integrate into the MES system to realize emergency stop record traceability
Ultimately reduce the risk to the ALARP area.
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