M&W PRESSURE RELIEF SYSTEMS

Engineered overpressure protection from M&W Pressure Relief Systems – a business unit of Mark & Wedell A/S

M&W Pressure Relief Systems is a specialized business unit of Mark & Wedell focused on engineered overpressure protection for safety-critical applications in the oil and gas, energy, process and industrial sectors.

 

We support operators, OEMs, service companies and engineering teams with pressure relief systems, burst disc technology, explosion venting and application-specific pressure safety components. As part of Mark & Wedell, we combine in-house engineering, mechanical production, assembly and documentation to deliver solutions designed for reliable fit, function and traceability.

 

Our core products and services include the Annulus Pressure Relief System (APRS), burst discs / rupture discs, explosive vent panels / explosion vent panels and engineering support for pressure relief specification and safe system integration.

 

Explore our Products & Services to see our core pressure relief solutions, including APRS, burst discs / rupture discs and explosive vent panels.

Key offerings include

  • Annulus Pressure Relief System (APRS): A proprietary overpressure protection system for oil and gas well stimulation and intervention, based on customized burst disc technology and engineered to protect the annulus through defined pressure relief.
  • Burst discs / rupture discs: Application-specific burst discs for gases, liquids and pressure safety systems, specified according to pressure, temperature, media, installation and documentation requirements.
  • Explosive vent panels / explosion vent panels: Vent panels for process industries, power plants and industrial installations where equipment must be protected against explosion pressure, pressure waves and vacuum damage.
  • Engineering services and pressure calculations: Engineering support for pressure relief specification and safe APRS deployment. Using dedicated engineering modelling tools, Mark & Wedell can simulate pressure behaviour across the treating iron and wellsite setup, accounting for flow rates, pressure thresholds and upstream/downstream equipment to support burst disc rating, safe operating windows and clear configuration notes for the field crew.

 

Every solution reflects our commitment to providing Accurate, Precise, Reliable and Safe.

Contact us for technical dialogue, product information or pressure relief specification support

Bjarke Pålsson

Co-CEO and Owner

Annulus Pressure Relief System

Mark & Wedell invented the Annulus Pressure Relief System (APRS) together with Maersk Oil & Gas, now part of TotalEnergies, as a trusted overpressure protection system for oil and gas well stimulation and intervention up to 10,000 psi (690 bar).

APRS is an advanced, yet simple-to-install and simple-to-use, system utilizing burst disc technology adapted from the nuclear power industry.

Maersk Oil & Gas and Aker BP – Development of Annulus Pressure Relief System for oil and gas well stimulation - 1995 and 2020
Burst-Disc-Frame

Burst Discs

Mark & Wedell supplies burst discs / rupture discs for reliable overpressure and explosion pressure relief in gases, liquids and industrial pressure safety systems, tailored to application-specific requirements.

Burst discs can be specified for a wide range of pressure and temperature ratings and delivered with relevant certification or documentation according to the application and customer requirements.

Explosive Vent Panels

Mark & Wedell supplies explosive vent panels / explosion vent panels for power plants, process industries and industrial installations requiring controlled explosion pressure relief.

Vent panels can be supplied in square or round configurations and customized for outdoor applications. Depending on the application, panels can be designed to withstand pressure waves and help prevent vacuum damage, with calibrated bursting pressure specified according to project requirements.

Explosion vent 5

In-house engineering and production

 

As an engineering and production company with key competencies and capabilities in-house, Mark & Wedell integrates pressure relief components into broader mechanical systems, ensuring reliable fit, function, documentation and operational readiness.

 

M&W Pressure Relief Systems supports operators, engineers, OEMs and service companies with technically sound pressure management components and engineered solutions from concept to delivery.

 

Our engineering team has decades of experience in pressure management, materials science and downhole tool integration. This enables us to assist customers from early-stage design through prototyping, testing and full-scale deployment.

 

Industry-specific codes and certifications

 

We work closely with OEMs, operators and service providers to meet relevant industry-specific codes, documentation requirements and certification expectations, including standards such as ASME, ISO and NACE where applicable.

 

Our manufacturing processes follow strict quality control principles, with traceability and documentation aligned with the specific pressure relief component, application and customer requirement.

 

Whether optimizing high-pressure equipment for offshore platforms and stimulation vessels or safeguarding sensitive instrumentation in energy and process plants, we deliver systems designed with safety, reliability and operational efficiency in mind.