Butterfly Valve SIL Safety Certification Compliance Procedure

Provide SIL certification, SIL grading, and other consulting services - Shenzhen Zhongnuo Testing Technology Co., Ltd.
What are the two main aspects the SIL certification focuses on?
The conformity of the product itself, as well as the hardware and software functionalities of the intended certified product, to the requirements of IEC61508 or more specific industry functional safety standards, such as hardware failure rates and failure modes.
Another focal point in our evaluation is the quality management system utilized during the development process, including the qualifications of the R&D personnel and the organizational structure, to ensure that the methods employed and the documentation followed throughout the product development align with relevant standards.
Through these two aspects of examination, we can say that from the entire company to the research and development process, and finally to the specific certified products, a complete closed loop has been formed, ensuring that the product's safety features can be reliably and safely achieved.

Safety Integrity Level, abbreviated as SIL, is distinguished by the probability of hazardous failure occurring per hour.
There are four SIL levels specified in the international IEC standards, with SIL4 indicating a high degree of integrity and SIL1 representing a low one. For each safety integrity level, design specifications that can reduce design errors are established.
The safety level required in the production process is assessed and determined by a specialized production technology company. Generally, processes with high safety requirements require a safety level of SIL 3.

The content of SIL level assessment includes:
1. System Evaluation
Risk analysis, refer to risk classification chart (ASIL/SIL/PL)
Review of specifications and safety requirements
Concept and Design Analysis
- Verification and Confirmation
2. Software and Tool Evaluation
– Testing of development tools and other communication protocols
Structural Analysis
3. Hardware Evaluation
Probability Analysis
Failure Analysis
4. SIL Certification
Components and Systems SIL Certification
- Safety Process SIL Certification
- Granting of systems, semiconductor, development tools, and process testing symbols
5. Additional Services
- Risk Applicability and Risk Analysis
- Test and evaluate hardware and software for security during the development process
Concept Evaluation (Initial Inspection)
Function and Safety Management (FSM)
Safety, Reliability, and Availability Analysis
Qualified Assessment Meeting Relevant Safety Standards
These services are aimed at manufacturers of components, sub-systems, and systems for the automotive industry (including electric vehicles), elevators, power plants, machinery, and process sectors. They support the fulfillment of due diligence obligations and ensure the correct application of the standard, contributing to enhanced safety levels and the reduction of residual risks. Standards IEC61508 and others can be integrated into existing quality management systems in a beneficial manner. The implementation of regulations and provisions within the standards provides a reliable basis for decision-making, particularly regarding safety structures, testing procedures, and tools. Development outputs can be validated at an early stage, while also reducing development time and costs. Furthermore, certification enhances the image and elevates the company's competitive position in the market.

SIL Functional Safety Certification is applicable to all equipment used to implement process control safety functions, mainly divided into electrical components and safety systems categories.
1. Electrical Components: Actuators, solenoid valves, field sensors, pressure transmitters, temperature transmitters, level transmitters, level switches, programmable controllers, logic solvers, field safety actuators (pneumatic/liquid/pneumatic), safety switches, safety valves, gate valves, solenoid valves, safety interlocks, etc.
2. Safety Systems: SIS (Safety Instrumented System), ESD (Emergency Shutdown System), Instrument Protection System (IPS), Burn Management System (BMS), F&G (Fire and Gas Protection System), HIPPS (High-Pressure Pipeline Protection System), PSD (Process Shutdown System).
3. Other: Electronics/Electrical/Programmable electronic products with safety requirements.
SIL certification is a third-party evaluation, verification, and certification based on standards such as IEC 61508 (GB/T 20438), IEC 61511 (GB/T 21109), IEC 61513, IEC 13849-1, IEC 62061, and IEC 61800-5-2, assessing and confirming the Safety Integrity Level (SIL) or Performance Level (PL) of safety equipment. Functional safety certification primarily involves assessments of document management (FSM) for the development process of safety equipment, hardware reliability calculations and assessments, software evaluations, environmental testing, and EMC electromagnetic compatibility testing. SIL certification is divided into four levels: SIL1, SIL2, SIL3, and SIL4, encompassing both product and system levels, with SIL4 having the highest requirements.