Swivel stacks

Reliability at sea

FPSO swivel stack expertise

In the unforgiving environment of offshore oil and gas, a single compromised component can shut down operations worth millions. For FPSO vessels processing oil from subsea reservoirs, swivel stacks are this critical link.

The stakes couldn't be higher:

When vessel operating costs run €100,000-800,000 per day, component failure isn't just expensive – it's catastrophic.

the challenge

The procurement challenge that keeps you awake

The nightmare scenario: A swivel stack fails during operation, forcing complete shutdown of an FPSO and costing millions in lost production.

We’ve witnessed the cascading problems that haunt procurement professionals:

1.

The expertise gap:

Finding engineers who truly understand the complex interplay of high pressure, corrosive fluids, and constant movement in swivel stack design

2.

The material challenge:

Sourcing specialized forged components that can withstand sour service conditions while meeting strict industry certifications

3.

The coordination nightmare:

Managing multiple suppliers across forging, machining, cladding, and testing – with potential finger-pointing when issues arise

4.

The compliance risk:

Ensuring every component meets stringent safety and environmental regulations for offshore applications

5.

The looming deadline:

Balancing thorough quality control against the pressure of installation schedules and vessel availability

The material specification trap:

When your swivel stack must handle aggressive sour service conditions, standard materials won’t suffice. We ensure proper selection of duplex and super duplex materials with appropriate cladding to prevent catastrophic failure in corrosive environments.

The certification maze:

Navigating the complex requirements of maritime certifications across multiple components requires specialized knowledge. We coordinate inspection schedules with certification bodies like Lloyd’s, DNV, ABS, and Bureau Veritas to prevent compliance issues from derailing your timeline.

The interface challenge:

Swivel stacks must connect perfectly with both subsea equipment and vessel systems. We ensure precise coordination of critical dimensions and connection specifications to prevent costly rework during installation.

The testing gap:

Insufficient testing protocols can hide problems until it’s too late. Our comprehensive approach ensures thorough validation at every stage – from material certification to final assembly testing.

costly mistakes

Preventing costly mistakes before they happen

your project

Why our swivel stack experience matters to your project

Most suppliers have never seen the inside of a forge, let alone coordinated complex swivel stack projects. Our team managed a dedicated division with six specialists focused exclusively on swivel stack projects for leading companies in this specific industry.

We understand the critical core ("koors") forgings that form the heart of every swivel stack

We know exactly which forging partners can meet the exacting specifications required

We've coordinated the complex multi-stage production process countless times

We speak the technical language that ensures your requirements are perfectly understood

fail

When standard solutions fail: real-world examples

our solution

The complete solution: from forge to final installation

Through our network of specialized producers, we deliver comprehensive swivel stack solutions:

Core forgings:

High-integrity forged components forming the critical pressure-containing elements

Advanced materials:

Specialty steels, duplex, and super duplex alloys precisely matched to your operating environment

Precision cladding:

Expert application of corrosion-resistant overlay materials where standard materials alone won’t suffice

Complete processing:

Coordination of heat treatment, machining, and final assembly to ensure perfect integration

every detail

Why every detail matters in swivel stack production

Swivel stacks represent one of the most demanding applications in offshore oil and gas:

Having managed these critical projects for decades, we understand the exacting standards required for success.

High pressure integrity:

Maintaining perfect sealing under constant pressure fluctuations

Corrosion resistance:

Withstanding aggressive fluids that would rapidly destroy standard materials

Dynamic performance:

Enabling constant movement while maintaining perfect sealing

Long service life:

Components must perform flawlessly for decades in hostile environments

Zero tolerance for failure:

The consequences of component failure extend far beyond replacement costs

contact us

Ready to experience true swivel stack expertise?

Submit your inquiry today and discover how our specialized knowledge and extensive network can deliver the precise swivel stack components your project demands. On time, on specification, and with the reliability your operation requires.