Category: Offshore Fabrication

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:

NTI Offshore Services

NTI Offshore Services is an Offshore Marine Construction &
Management Company

NTI supports the Oil & Gas and marine market designed to provide our clients with turnkey services for their projects from concept to installation. NTI Offshore Services specializes in providing our clients with total Project Management, engineering design, fabrication services, NDT Technicians, Access Technology, welding and I&E construction craftsmen, and labor sourcing. Our experienced team will work closely with our customer to provide quality products and services conducive to your level of urgency or predetermined project schedule. NTI Offshore Services is committed to our customer to produce a quality product safely and does so through pride of workmanship, safety culture, and emphasis in our quality control and inspection.

offshore welding topside

•NTI Offshore Services Project Management personnel is comprised of specialists who have extensive experience in managing, tracking, and completing difficult offshore projects on time and on budget. Below is a list of a few of the Project Management ervices NTI Offshore provides our clients:
•Total Project Management
•Cost, Time, and Resource Management
•Management of Change
•Real time reporting budgeted vs. actual
•4D Scheduling and 3D BIM Modeling
•Logistical coordination of all parties personnel and equipment to sequence
mobilization for efficiency and overall cost reduction
•Site Supervision and Inspection
•FAT Witnessing and Commissioning
•Gantt Chart and Construction Sequencing
High Pressure Pipe Design and Commissioning
•Structural Design and Commissioning

Lots of Metal Fabrication at OTC This Year

Even with oil prices down, most of the clients we visited at OTC had positive remarks about the show traffic and opportunities. It’s always good to see the heavy fabrication, subsea, and offshore work we do on display at our OEM’s booth. Here’s a great review of the show: 

Offshore Fabrication At Its Best – OTC 2014

Proud to see our fabricated projects on display at OTC this year. The Offshore Technology Conference in Houston was another technical marvel.  Once again – Pushing metal fabrication and design to the limits.  They say as much, if not more technology goes into Engineering, Design, Fabrication and Construction for offshore projects as goes into outer space!  We believe it! Another great year at OTC!

Offshore Fabricated Structures & the DNV

We’re winning more and more offshore fabrication for our Mid South Fabrication principal.  Right now we have a project in-house for umbilical reel frames to be mounted on drill ships.

Of course weld procedures used on anything fabricated for offshore applications have to be certified by the DNV.  Mid South Fabrication is no stranger to developing welding procedures to our client’s welding specifications.  We’re a code weld shop for heavy structural welding to AWSD1.1 standards, including  ASME and National Code Welding – R, S, U, NB.  From pressure vessel and high pressure pipe welding witnessed and certified by Hartford Steam Boiler to the DNV – we work with all classification societies in developing our weld procedures.

For these umbilical reel frames, our EPC client needed us to perform to their own inhouse weld procedure, and witnessed by the DNV.

Offshore Fabricated Structures

Fabricated Structures for Offshore Oil and Gas
1) & 2) Conventional fixed platforms (deepest: Shell’s Bullwinkle in 1991 at 412 m/1,353 ft GOM)
3) Compliant tower (deepest: Chevron Texaco’s Petronius in 1998 at 534 m /1,754 ft GOM)
4) & 5) Vertically moored tension leg and mini-tension leg platform (deepest: ConocoPhillips’ Magnolia in 2004 1,425 m/4,674 ft GOM)
6) Spar (deepest: Dominion’s Devils Tower in 2004, 1,710 m/5,610 ft GOM)
7) & 8) Semi-submersibles (deepest: Shell’s NaKika in 2003, 1920 m/6,300 ft GOM)
9) Floating production, storage, and offloading facility (deepest: 2005, 1,345 m/4,429 ft Brazil)
10) Sub-sea completion and tie-back to host facility (deepest: Shell’s Coulomb tie to NaKika 2004, 2,307 m/ 7,570 ft)
Source: NOAA – Numbered from left to right; all records from 2005 data


Det Norske Veritas (DNV) recently merged with the classification society Germanischer Lloyd to form DNV GL. In order to certify to our client’s weld procedure, first we will send the welding and testing specifications to a DNV welding engineer. Once approved, a DNV surveyor will do a site visit to witness the welding of two test coupons, using the exact brand of welding wire, amperage, and speed – as dictated in the client’s weld procedure.  Then one of the test coupons will be sent sent to a lab for a secondary DNV surveyor witness on destructive and nondestructive examination and analysis.