In order to ensure that the "two focus of a major chemical plant and storage of hazardous chemicals safety operation of the facilities, according to the" guidance "on strengthening the administration of work safety management of chemical safety instrument system, the safety instrument system in our country and the corresponding safety measures in the design, installation, operation and maintenance of the various stages of the life cycle management is still inadequate the analysis of risk and risk design, improper selection, redundancy structure, test cycle, lack of preventive maintenance strategies aiming at the problem of weak.

Kang security to meet the requirements of IEC61508 and IEC61511 standards for safety integrity level for the enterprise (SIL) assessment services, design, instrument system to regulate the device operation and maintenance management, curb accidents, improve the level of intrinsic safety device. Kang security SIL assessment services:

(1) SIL grading

SIL evaluation method is based on risk analysis, according to determine the risk of acceptable standards, determine its grade. Each protected device / device sets the reliability target in accordance with the level of size.

SIL levels are defined as follows:

(2) SIL validation

Calculate the response failure probability (PFD) of different safety instrumented loops, and verify whether the hardware configuration of the function of the security instrument meets the requirements of SIL level.

(3) SIL maintenance test plan

The failure mode of most security systems are potential failure, using the standard method to evaluate the health security system security requirements or provisions of the SIL level, and the maintenance and test plan is determined according to the calculation and verification of failure mode under consideration, to meet the corresponding reliability and availability requirements.