Why Choose Arthian's Process Engineering team?
Engineering services delivered by specialists:
Relief Systems & API 2000 Venting
Whether you’re launching a new distillery or expanding capacity, our expertise ensures efficient, scalable and environmentally responsible production.
Engineering safe, compliant and reliable overpressure protection for industrial facilities
Relief systems are a critical safeguard in any industrial process. They protect equipment, people and the environment from the consequences of overpressure, vacuum conditions and abnormal operating scenarios. Poorly designed or incorrectly sized relief systems are a leading cause of major accidents, regulatory non‑compliance and unplanned shutdowns.
Arthian provides specialist relief system design, verification and API 2000 venting assessments for chemical, manufacturing, energy, utilities and high‑hazard facilities, including bulk fuel storage and COMAH‑tier operations.
Why Relief Systems Matter
Overpressure events can be triggered by:
- equipment failure
- blocked outlets
- runaway reactions
- thermal expansion
- fire exposure
- control system malfunction
- operator error
- vacuum conditions during draining or cooling
A correctly designed relief system ensures that these events do not escalate into catastrophic failures.
Relief systems are a core component of Process Safety and must be integrated into design, FEED and operational reviews.
Our Relief System Engineering Services
Relief Valve Sizing & Verification
We size and verify relief devices to ensure safe and compliant operation under all credible scenarios.
- Pressure relief valve (PRV) sizing
- Vacuum relief valve (VRV) sizing
- Rupture disc specification
- Combined PRV/rupture disc arrangements
- Multi‑scenario sizing and worst‑case identification
- Verification of existing relief devices
This work is grounded in Process Modelling & Simulation where required.
API 2000 Venting for Storage Tanks
API 2000 governs venting requirements for atmospheric and low‑pressure storage tanks. We provide:
- Normal venting calculations
- Emergency venting for fire exposure
- Vapour balancing and conservation venting
- Fixed‑roof and floating‑roof tank venting
- Breather valve specification
- Integration with tank farm control and safety systems
Overpressure & Vacuum Scenario Analysis
We identify and evaluate all credible scenarios that could lead to overpressure or vacuum conditions.
- Blocked outlet
- Fire case
- Thermal expansion
- Control valve failure
- Utility failure
- Reflux or cooling loss
- Reaction runaway
- Vacuum during draining or cooling
This ensures relief systems are designed for real‑world operating conditions.
Relief System Design for High‑Hazard & COMAH Sites
We support COMAH‑tier facilities with relief system design aligned to regulatory expectations.
- Relief system basis of design
- Relief load calculations
- Disposal system design (flare, vent, scrubber)
- Relief header and manifold design
- Knockout drum sizing
- Integration with COMAH Safety Reports
Disposal System & Vent Routing Design
Relief systems must not only relieve pressure — they must do so safely.
We design:
- flare systems
- vent stacks
- scrubbers
- knockout drums
- dispersion and dilution systems
- safe discharge locations
This ensures environmental and safety compliance.
Relief System Audits & Compliance Reviews
We assess existing systems to identify gaps, risks and improvement opportunities.
- Relief device adequacy checks
- Set pressure and capacity verification
- Documentation and calculation review
- Relief header capacity checks
- API, ASME and ISO compliance
- Integration with HAZOP/LOPA findings
This is often combined with Process Optimisation and operational improvement programmes.
Where Relief Systems Add Value
We support relief system design across:
- chemical manufacturing
- industrial manufacturing
- pharmaceuticals
- food & beverage
- energy & utilities
- COMAH and high‑hazard facilities
- bulk fuel storage and terminals
Integration
Fully integrated with geotechnical, hydrological, and ecological disciplines.
Our Experience
National experience with regional insight and regulatory familiarity.
Our Understanding
Deep understanding of planning, infrastructure, and environmental interfaces.
Results Driven
Commitment to technical rigour, clear communication, and long-term outcomes.
Get in Touch
We’d love to hear from you – whether you have a question, a project in mind, want to explore job opportunities, or just want to say hello.