The same DNV certified metal fabrication structures needed for offshore oil and gas will apply to any offshore wind fabrication project. Welds are welds and they must be witnessed and tested before any lifting operations are carried out in offshore waters.
https://www.npr.org/2023/01/24/1145384765/biden-offshore-wind-jobs-challenges
The White House said Thursday it was targeting 15 gigawatts of floating offshore wind capacity by the year 2035, as it looks to compete with Europe and Asia in the nascent sector.
As planning and construction ramp up for offshore wind farms in the United States, there will be one manufacturer that can not legally supply materials. As if we need another supply chain issue…
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:
https://global.ihs.com/doc_detail.cfm?document_name=DNV%2DOS%2DC401&item_s_key=00398859
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
welding.
“For too long, China’s lack of adherence to global trading norms has undercut the prosperity of Americans and others around the world,” she told a briefing in Washington. (Trade Representative Katherine Tai)
https://www.bbc.com/news/business-58793191
Let us get your project DNV Certified… “missing metal studs in some sections of the structure, different kinds of concrete used for the slab and unfinished or badly welded joints were some of the other factors that caused the raised railway to buckle, sending two subway carriages plummeting to the streets below.”
Maybe not – a neighbor just asked me:
“I am in need of a 1/4 plate of cast iron measuring about 30” x 24” for a fire back in my fire pit (to radiate heat) Do you know someone locally that might carry this or could cut to size?”
My answer: Try to find a local metal fabricator with a plasma cutting table. The problem will be finding someone who will do a small job like that. You might have to be flexible on turn around time, allowing them to “fit it in” between their higher production jobs. FYI – you don’t want cast, you want “plate” metal. Cast metal is just that, casted to a specific size in a mold and no one cuts, or provides that. You want just plain old carbon steel plate (most common is A36)
ALSO – fire will burn through / rust through any metal. I would have them cut it out of 3/8″ or 1/2″ would be even better. The material cost will be the least expensive part of this job. Many shops also have minimum order sizes ranging from $100 to $300 – hopefully you can find one that will work with you. Plasma cutters are fairly common these days and the “edge quality” has really improved. Ask the about edge quality. While you can’t expect baby butt smooth (like we get on our lasers) – you also don’t want it to look like they cut it with a oxy/acetylene torch. So steer clear of oxy/acetylene cutting tables, or anyone offering to cut it by hand with a torch, unless you don’t care if it has ragged edges… We only do laser cutting. But you do not need that kind of precision.
High definition” plasma cutting tables are the latest and greatest. But any plasma cutter should meet your needs. Most “metal fabrication” shops in Texas have added a plasma cutting table to their service offerings, you can find a metal fabricator on every corner in Houston!
Every year our laser shop @ RiverCity Industries holds an employee contest for the best Christmas ornament. Last year our Tube Laser won it, this year’s winner goes to our flat bed Fiber Laser operators!
Our tube lasers are the perfect machines for cutting dimensional profiles in the sidewalls and end profiles of both round and square steel tubing. You can read more about the capabilities here:
https://oceanfabricators.com/tube-laser-cutting/
Because of the high programming and setup time,