TL;DR: High Integrity Pressure Protection Systems (HIPPS) originated in subsea oil and gas production and are now gaining traction in land-based facilities. By blocking overpressure at the source rather than venting to flare, HIPPS eliminate the need for expanded flare infrastructure, reduce environmental emissions, and lower design costs—making them an increasingly cost-effective alternative to conventional pressure relief valves (PSVs).
Overpressure events don't forgive errors. The consequences—damaged equipment, facility downtime, environmental releases, and risk to human life—can be catastrophic. For decades, PSVs and flare systems were the default answer. But as environmental regulations tighten, flare licenses hit their limits, and process designs grow more complex, the industry is turning to a more intelligent solution: High Integrity Pressure Protection Systems, or HIPPS.
What was once considered expensive, niche technology for subsea applications is now one of the most economically sound choices for land-based facilities. Here's why HIPPS are becoming the smart pressure management strategy of the future—and how MICA Controls is leading the charge.
A HIPPS is a Safety Instrumented System (SIS) designed to prevent overpressure by shutting off the source of pressure before damage can occur. Rather than venting high-pressure process fluid to a flare or relief device, HIPPS block the flow at the source—containing pressure within the high-rated upstream infrastructure.
HIPPS technology originated in subsea oil and gas production, and the reason is straightforward: you can't flare offshore. In subsea applications, wellhead infrastructure is often rated for much higher pressure than the downstream production lines and floating platforms it connects to. If a high-pressure wave were to travel down those lines unchecked, the results would be devastating. HIPPS solved this by isolating the overpressure within the wellhead zone, protecting the lower-rated production equipment and floating facilities above.
These systems were expensive to develop and implement—but when your only alternative is catastrophic failure, cost becomes secondary. What the subsea industry proved, however, was that HIPPS work. And as the technology matured, it became clear that the same logic applied onshore.
The financial argument for HIPPS has shifted significantly as the technology has evolved. One of the most impactful—and underappreciated—benefits is the ability to design central processing facilities at a lower pressure rating than the upstream pipeline infrastructure.
When a HIPPS is in place, it ensures that a high-pressure event from the pipeline will not reach the lower-rated downstream equipment. That means engineers can specify lighter-wall piping, lower-rated vessels, and smaller flare management systems for the central processing facility. The capital savings across an entire facility design can be substantial.
MICA Controls has developed a HIPPS solution that is not only technically robust but genuinely cost-effective for land-based applications—a combination that was difficult to achieve when the technology was newer. The MICA HIPPS includes built-in diagnostics for valve failure detection—an innovation that extends proof testing intervals and reduces the probability of failure on demand.
Regulatory authorities (the Authority Having Jurisdiction, or AHJ) require pressure relief on vessels and piping systems. In most cases, PSVs satisfy this requirement. They are straightforward, cost-effective, and well-regulated. But there are situations where PSVs fall short—and that's precisely where HIPPS step in.
MICA Controls implements HIPPS solutions when one or more of the following conditions are true:
In some scenarios, a conventional PSV doesn't just fall short—it actively makes the situation more dangerous. A well-designed HIPPS, certified to IEC 61511 and compliant with ANSI/ISA S84.01-2004, can be a safer and more reliable solution than mechanical relief alone.
Flaring works—until it doesn't. In greenfield projects, designing a flare system into the facility from the start is often the lowest-cost path. But as facilities expand, flare systems hit their licensed limits, and regulators aren't always willing to issue permits for expanded emissions.
This is one of the most common drivers for HIPPS adoption in land-based facilities today. Operators who want to increase production capacity without triggering a flare permit expansion need an alternative way to manage overpressure scenarios. HIPPS provides that alternative by blocking high-pressure flow upstream, eliminating the demand on the flare system entirely.
MICA Controls has executed multiple projects where HIPPS were used to stage or eliminate flare venting from compressors, allowing facilities to expand production within their existing flare license boundaries. The result: increased output, no new environmental approvals required, and a cleaner operational footprint.
Nowhere is the case for HIPPS more compelling than in Alberta's Steam-Assisted Gravity Drainage (SAGD) operations. SAGD wells produce a bitumen emulsion—a mixture of hot water, steam, and heavy oil—that presents a unique challenge for overpressure management.
The problem: SAGD emulsion is mostly water and non-flammable oil. It cannot be sent to flare. If an overpressure event were to open a PSV, that emulsion would have to go somewhere—and wherever it went, it would need to be collected, contained, and treated. Building and operating a dedicated emulsion treatment facility for a worst-case overpressure scenario is enormously expensive. A PSV doesn't prevent the release; it just controls the consequences.
HIPPS prevents the release entirely. MICA Controls pioneered the use of HIPPS on Alberta SAGD facilities precisely because of this constraint. By blocking the overpressure at source, HIPPS eliminate the need for expensive downstream emulsion handling infrastructure and dramatically simplify the risk profile of these facilities.
HIPPS aren't limited to wellhead and vessel protection. MICA Controls has also deployed HIPPS systems to protect compressor turbomachinery in complex process environments.
One increasingly common application involves NOx abatement systems. Environmental regulations now prohibit many facilities from emitting nitrogen oxides above certain thresholds. Installing NOx abatement equipment often means adding large, thin-walled vessels downstream of existing compressor systems. The problem: certain compressor failure modes can generate overpressure conditions that could rupture that equipment.
In these applications, MICA's HIPPS monitors process pressures in real time and intervenes before energy can be added that would cause an overpressure. The system protects the NOx abatement equipment, prevents an environmental incident, and keeps the compressor operating within its safe envelope. It's a precise, engineered response to a problem that a conventional PSV cannot elegantly solve.
The regulatory, environmental, and economic pressures that make HIPPS attractive today aren't going away. Flare licensing is becoming harder to expand. Environmental standards are tightening. Process designs are growing more complex. And the cost of a catastrophic overpressure event—measured in equipment, production, environmental liability, and human safety—continues to rise.
HIPPS systems, designed and implemented correctly, address all of these pressures simultaneously. They protect people. They reduce environmental exposure. They shrink capital costs. And they allow facilities to grow without being constrained by legacy flare infrastructure.