DNV 2.7-1 and EN 12079: How TLS Containers Meet Offshore Engineering Standards

In offshore oil & gas, offshore wind, and other marine engineering projects, containers are not only transportation units but also critical equipment that must withstand lifting operations, deck handling, and long-term offshore service. Compared with standard ISO containers, offshore containers are subject to far more stringent structural, safety, and certification requirements.

Among these, DNV 2.7-1 and EN 12079 are the most widely recognized international and European standards for offshore containers.

As a professional manufacturer of offshore functional containers, TLS integrates these standards into the design, manufacturing, and testing stages to ensure safety, reliability, and full compliance in demanding offshore environments.

DNV 2.7-1 and EN 12079: Understanding the Relationship

DNV 2.7-1, issued by Det Norske Veritas (DNV), is a globally accepted certification standard for offshore containers. It defines requirements for structural strength, lifting safety, testing procedures, marking, and periodic inspection.

• EN 12079 is the European standard for offshore containers and lifting equipment, and its technical requirements are largely aligned with DNV 2.7-1:
• EN 12079-1: Design and manufacturing of offshore containers
• EN 12079-2: Lifting sets

In practical offshore projects, containers certified to DNV 2.7-1 are generally recognized as meeting the core requirements of EN 12079, and are widely accepted by European owners, EPC contractors, and classification societies.

Designing for Compliance from the Start

TLS adopts DNV 2.7-1 design principles from the earliest project stage, rather than treating certification as a post-production step:

• Structural design based on offshore lifting conditions, considering dynamic loads, eccentric loading, and impact forces
• Reinforced main load-bearing structures and optimized lifting point arrangements
• Use of compliant steel grades, qualified welding procedures, and offshore-grade corrosion protection systems
• Full structural verification for functional containers such as accommodation units, laboratories, and equipment modules, ensuring internal installations do not compromise structural integrity

Design documentation prepared for review by classification societies or approved third-party inspectors

Testing and Verification

In accordance with DNV 2.7-1, TLS offshore containers undergo mandatory testing and inspection, including:

• Lifting load tests to verify structural safety margins
• Detailed inspection of lifting points and critical structural areas
• Welding quality and manufacturing consistency checks

Upon successful completion, a DNV 2.7-1 certificate is issued by DNV or an approved inspection body, typically covering compliance with EN 12079-1 and EN 12079-2 as well.

Marking, Certification, and Traceability

Each TLS offshore container certified to DNV 2.7-1 is clearly marked with:

• Manufacturer details and a unique serial number
• Maximum Gross Weight (MGW) and tare weight
• Design temperature range
• Certificate number and applicable standards (DNV 2.7-1 / EN 12079)

These markings ensure full traceability and regulatory compliance throughout global offshore operations.

A Compliance Advantage for Global and European Projects

With DNV 2.7-1 certification and EN 12079 compliance, TLS offshore containers:

• Are widely accepted across global offshore projects
• Meet entry requirements for European offshore and energy markets
• Reduce compliance risks and accelerate project approval and delivery

Certification is not just a formality—it reflects TLS’s commitment to engineering safety, quality control, and long-term reliability in offshore environments.
 
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Written by Snowy

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