Process systems or equipment delivered from around the world require verification to meet project and regulatory requirements before they arrive at site for subsequent integration or use on projects.

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Our competent and internationally recognised appraisals of your products and equipment, supported by a worldwide network, provide the required independent assurance towards end-users that these arrive at site, designed, manufactured or built to specifications and are in compliance with regulatory requirements where relevant.


DNV provides technical support, design reviews and surveys and provides where required the relevant certificates and reports which are well recognized in the industry for accuracy and competent assessment. With a worldwide network of technical resources close to designers, manufacturers and fabricators, our services are both efficient and cost-effective.

Our approach

We offer independent verification that personnel, procedures, equipment and products meet specifications. We do this by applying risk-based methodology contained in a number of service specifications for various objects, covering some or all of the following activities:

Design reviews
DNV perform design review to DNV standards, recognised codes and standards, project specifications and operator performance standards. This includes EC directives on all types of equipment intended for use offshore. Design review is produced for specific jobs (case approval), or if the intention is to manufacture several over a period of time (type approval, valid for 4 years).

Fabrication surveys
Fabrication surveys are based upon criticality (e.g. energy content, hazardous nature of fluids, structural importance) of equipment, statutory, class or flag requirements to third-party and operator or vendor preference.

Manufacturing survey arrangements
Manufacturing survey arrangements are available to clients with type approved products. An MSA reduces the level of DNV involvement in the production processes. This may be established for companies with ISO 9000 systems and after a successful Manufacturer product quality assessment.

Manufacturer product quality assessment
Manufacturer product quality assessments are a new quality rating system that audits manufacturing process from the shop floor. The assessment can also be used on behalf of a client on new or existing vendors.

Survey schemes
Survey schemes are used for all types of equipment intended for offshore use, whether owned by an operator or service company. The equipment may be surveyed to a survey scheme agreed with DNV and the equipment owner.

Welding procedures, welder qualification
DNV performs expert witnessing and approval of welding procedures and can assess welders to recognized standards.

Products covered

We provide our services for the following products/objects:

Offshore containers
The certification of offshore containers can be assessed to comply with the following:

  • DNV Standard 2.7-1, 2.7-2 and 2,7-3
  • DNV Rules for Planning and Execution of Marine Operations
  • BS EN12079
  • IMO Circ 860
  • NORSOK Z015.

Hazardous area equipment
Equipment can be certified to the following:

  • Zone 2 Diesel engines to EEMUA 107, OCMAMEC 1 & BS EN 1834-1: 2000
  • Zone 1 & 2 Electrical Equipment
  • ATEX.

Lifting appliances

DNV rules for certification of lifting appliances can be used for cranes, lifting beams, A Frames, winches, reels, etc.

Well control equipment
DNV has wide knowledge and experience regarding well control equipment such as:

  • Christmas trees/valves/manifolds
  • Blow out preventers
  • Drilling riser systems
  • Wireline equipment
  • Coiled tubing equipment
  • Well test equipment.

Linepipes and bends
Fabrication surveys can be performed at steel plate, pipe mills and bend manufacturers based on DNV OS-F101, API 5L or other internationally recognised linepipe specifications.

Pressure vessels, piping and accessories
The Pressure Equipment Directive is applicable to pressure vessels, piping and accessories. DNV has local resources for gap analysis and formal quality system assessment to 97/23/EC Pressure Equipment Directive and SI 2001(1999) Pressure Equipment Regulations. DNV can advise on the relevant codes and standards such as ASME VIII, PD5500 and ASME B31.3. DNV also advises on categorisation and choice assessment module.

We also provide Provision & Verification of Written Schemes of Examination (WSE) and Inspection to a WSE Risk Analysis (extension of inspection intervals) according to Pressure System Safety Regulations (PSSR).

Wind energy (onshore & offshore)
DNV has published standards and specifications for wind turbine structures and components and for certification of tidal and wave energy converters. We can perform verification covering:

  • Structural design analysis
  • Power system analysis
  • Fabrication and component manufacture
  • Installation and testing.