Provide SIL Certification, SIL Grading, and other consulting services — Shenzhen Zhongnuo Testing Technology Co., Ltd.
As the recognition of industrial accidents and their societal impact grows, more and more companies are realizing the importance of safety.
In modern process industries, due to complex processes and numerous equipment, any failure can have severe consequences for employees, the public, equipment, or the environment.
The SIL certification process is about helping companies fully leverage their good engineering practices and safety technologies (IEC61508 and IEC61511) to prevent industrial accidents from recurring. This is because these experiences and technologies are based on a wealth of practical experience and lessons learned.
With the issuance of the IEC 61508 and IEC 61511 series standards, a systematic functional safety assessment and testing process can effectively address this issue.

SIL Certification Level Pre-Assessment Submission Document Checklist
Product Instructions
2. Product Safety Feature List
3. Product Safety Manual
4. Failure Mode and Effects Analysis (FMEDA) Excel File
5. Quality Management System Certificate (ISO9001)
6. Product Photos (including front and side views of representative models)
7. Product Design Documents (drawings, material reports, calculations, etc.)
8. Additional Information

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 SIL 4 indicating high integrity and SIL 1 indicating low. For each safety integrity level, design specifications that can reduce design errors are stipulated.
The safety level required for the production process is assessed and determined by a specialized production technology company. Generally, processes with high safety requirements need a safety level of SIL3.

The standard for SIL Safety Integrity Level certification primarily includes:
1. IEC61508—Establishes fundamental safety requirements for both conventional system operation and fault prediction capabilities. These requirements encompass general safety management systems, specific product design, and process design to meet safety requirements, aiming to avoid both systematic design failures and random hardware failures.
2. IEC61511 – A functional safety standard specifically for safety instrumented systems in the process industry, which is a domain standard released by the International Electrotechnical Commission (IEC) following the foundational functional safety standard IEC61508. In China, the coordinating standard for IEC61511 is GB/T 21109.
3. ISO 13849-1 – Comprehensive safety assessment from components to systems. This standard also provides designers with more quantifiable design implementation methods.
4. IEC62061 - Standard in the field of electrical systems.
5. IEC61326-3-2 – Specifies additional requirements for the immunity levels of safety-related equipment, including low probability end-of-site occurrences.
6. ISO 26262 - Primarily focused on specific electrical components, electronic devices, and programmable electronic devices in the automotive industry, dedicated to the automotive field. It aims to enhance the functional safety of automotive electronics and electrical products.
SIL certification is a third-party assessment, verification, and certification that evaluates and confirms the Safety Integrity Level (SIL) or Performance Level (PL) of safety equipment 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. Functional safety certification primarily involves document management (FSM) assessments for the development process of safety equipment, hardware reliability calculations and assessments, software evaluations, environmental testing, and EMC electromagnetic compatibility tests. SIL certification is divided into four levels: SIL1, SIL2, SIL3, and SIL4, encompassing both product and system levels, with SIL4 being the most stringent.