Category: DNV Fabrication Skids

DNV Fabrication and Testing of Offshore

DNV -OS-C401 offshore construction standards contain technical requirements, principles and acceptance criteria related
to classification of offshore units as it pertains to DNV/GL classification society. Order your copy here:

This standard will:
— Provide an internationally acceptable standard giving the minimum requirements for fabrication of
offshore structures, installations and equipment by welding, including requirements for mechanical fastening,
testing and corrosion protection systems.
— Provide guidelines for designers, fabricators, manufacturers, suppliers, purchasers and regulators.

This DNV standard is written for world-wide application. Note: Country and local government jurisdiction regulations may
include requirements in excess of the provisions by this standard depending on the size, type, location and
intended service of an offshore unit.

The standard provides requirements for fabrication and testing of offshore units.
The standard gives requirements for the following:
— Contractors: Chapter Two – Section Two
— Welder qualifications: Chapter Two – Section Three
— Welding consumables: Chapter Two – Section Four.
— Qualifying weld procedures: Chapter Two – Section Five
— Tolerances: Chapter Two – Section Six
— ND testing: Chapter Two – Section Seven
— Coating and Corrosion Protection systems: Chapter Two – Section Nine
— Mechanical fastening: Chapter Two – Section Ten

Also included are the DNV’s recommendations on safe engineering practices for general use by the
offshore industry.

The requirements in this standard apply to offshore units, installations and equipment fabricated by

Houston, TX DNV Fabrication 2.7-1 & 2.7-3 for Offshore Lifting Equipment

Houston, TX DNV Fabrication 2.7-1 & 2.7-3 for Offshore Lifting Equipment

DNV Fabrication Certified for Lifting Equipment. DNV GL 2.7-1 and 2.7-3 are offshore fabrication certifications specifically for lifting operations while the vessel is stationary or under way.

DNV Umbilical Spools – DNV Lifting Baskets  – DNV Equipment Skids

We can fabricate any structure and any equipment to any DNV specification.

For a Complete “How To” on the DNV fabrication process, please see our explanation here:

How To – Fabrication of DNV Certified Skids 2.7-1

Increased demand for fabricated DNV skids is being driven by quality and safety concerns for equipment being installed on any DNV classed vessel, including any offshore platform, marine vessel, FPSO, drill ship, or other marine installation. These concerns are at an all-time high as a result of the Macondo blowout in the Gulf of Mexico in 2010.

dnv classed vessel skid fabrication 2.7-1

Operating these complex systems and facilities requires complex fabrication. Our principal’s DNV certification procedures assure owners, authorities, and other stakeholders that the DNV classed facility has certified equipment aboard and complies with DNV classification rules and requirements – independent of location.

Classing Societies and the IMO

IMO is the International Maritime Organization and it is the United Nations agency responsible for the safety and security of shipping and the prevention of pollution by ships. The IMO is the standard-setting authority for the safety, security, and environmental aspects of international shipping. It creates a regulatory framework for the shipping industry that is universally adopted.

The IMO has adopted standards for other “recognized organizations” like the DNV which are called classification societies.

At Ocean Fab, safety, quality, the environment, and compliance with DNV standards are our number one concern. In order to gain DNV emblems for any skidded equipment, a number of approval and certification procedures must be followed. Our principals have many years’ experience with complex fabrications, including subsea and offshore / topside fabrication.

DNV has traditionally been more popular in European waters, but since it has become the number one classing society in the world, more and more super major oil companies and operators are requiring that any equipment going on a DNV Classed Offshore Installation going anywhere in the world become certified by DNV. Whether it’s a temporary or a permanent installation – fixed or floating offshore installations, ships, drill rigs, production rigs, or offshore vessels, including floating platforms. This equipment can include rental equipment, skidded equipment, shipping containers, seacans, frames, structural steel, twistlocks, sea fastening clips, deck fastening, waste skips, tanks – the list goes on and on.