HIPPS provides a solution to protect equipment in cases where:
HIPPS is an instrumented safety system that is designed and built in accordance with the IEC 61508 and IEC 61511 standards.
The international standards IEC 61508 and 61511 refer to safety functions and Safety Instrumented Systems (SIS) when discussing a device to protect equipment, personnel and environment. Older standards use terms like safety shut-down systems, emergency shut-down systems or last layers of defence.
A system that closes the source of over-pressure within a specified time with at least the same reliability as a safety relief valve is usually called a HIPPS. Such a HIPPS is a complete functional loop consisting of: