Can a Vietnamese shop meet EN 1090 EXC3?

Some hold the certification and some do not. It is one of the first things we check when a wind drawing arrives, and we only send EXC3 work to shops that can show the certificate and the factory production control behind it.

Who certifies the structure?

The turbine OEM or the owner appoints the certifier, typically against DNV or IEC rules. The fabricator delivers the documentation the certifier asks for. We do not certify anything ourselves.

Can offshore coating classes be reached in Vietnam?

Yes, in controlled paint shops with the right applicator qualification. We match to those shops rather than to a general fabricator when the drawing calls for C5-M or CX.

How many shops receive my drawing?

At most three, and only after you agree. Under NDA first if you ask for one.

Is there a fee for buyers?

No. Buyers pay nothing. Shops pay a fee for each RFQ they choose to take, and we take no commission on the order.

Wind energy · Heavy fabrication sourcing

Wind energy structures, fabricated for fatigue and the coating that follows.

Bedplates, nacelle frames, tower sections, transition pieces and the jigs that assemble blades and hubs. Send the drawing; we match it with up to three Vietnamese shops that hold procedures for cyclically loaded work and can reach the coating class the site demands. They quote you directly.

Get Matched With a Heavy Frame Supplier What the drawing should say

01 · What we place

The wind energy work this network takes

Bedplates and mainframes

The welded frame under the drivetrain. Stress relieved, then machined for the bearing and gearbox interfaces.

Nacelle frames and covers structure

Space frames and brackets that carry the nacelle cover, converter cabinets and service crane.

Tower sections and transition pieces

Rolled and welded cans with bolted flanges, where flange flatness and longitudinal seam quality drive acceptance.

Blade and hub assembly jigs

Large fixtures with machined locating faces, built to hold a blade root or hub during bolting and inspection.

Foundation and anchor cage steel

Anchor cages, embedment rings and templates delivered to civil contractors ahead of the pour.

Service and maintenance frames

Gearbox exchange frames, transport frames and blade root stands.

02 · Specification

What the drawing usually calls out

Typical call-outs for this class of work, credited to the standards that define them. They describe what buyers ask for, not a capability we hold ourselves. The shop that quotes confirms what it can actually meet.

Execution class	EN 1090-2 EXC3 is common for tower and support steel; state the class on the drawing so the shop can price the inspection
Weld standard	ISO 3834-2 quality requirements with procedures to ISO 15614; AWS D1.1 on North American drawings
Fatigue	Detail categories per EN 1993-1-9 or IEC 61400-6; DNV-ST-0126 where the support structure is certified
Material	S355J2 or S355NL for cold sites, with EN 10204 3.1 certificates traceable to heat
NDT	100% UT on longitudinal and circumferential butt welds in tension; MT on stiffener and bracket toes
Coating	ISO 12944 C5 for onshore, C5-M or CX for offshore, on a Sa 2½ blast; duplex galvanise plus paint where specified
Flange flatness	Tower flange flatness and gap limits as called out by the turbine OEM, verified by laser tracker before shipment

03 · Matching

How shops are shortlisted for wind energy work

Rolling and oven size

Tower cans need plate rolls and an oven long enough for the section. We filter on both before sending the RFQ.

Coating chain that reaches the class

C5-M is a controlled paint shop, not a yard. Shops on this shortlist either hold the line in house or subcontract to a qualified applicator and quote it as one job.

Machining after relief

Bedplates are machined after stress relief, sometimes twice. We only match shops with a documented relief cycle and a mill that takes the piece in one setup.

The full five-stage process is public on how we vet. Use it on your own suppliers if that is more useful than sending us the drawing.

FAQ

Questions wind energy buyers ask first

Can a Vietnamese shop meet EN 1090 EXC3?: Some hold the certification and some do not. It is one of the first things we check when a wind drawing arrives, and we only send EXC3 work to shops that can show the certificate and the factory production control behind it.
Who certifies the structure?: The turbine OEM or the owner appoints the certifier, typically against DNV or IEC rules. The fabricator delivers the documentation the certifier asks for. We do not certify anything ourselves.
Can offshore coating classes be reached in Vietnam?: Yes, in controlled paint shops with the right applicator qualification. We match to those shops rather than to a general fabricator when the drawing calls for C5-M or CX.
How many shops receive my drawing?: At most three, and only after you agree. Under NDA first if you ask for one.
Is there a fee for buyers?: No. Buyers pay nothing. Shops pay a fee for each RFQ they choose to take, and we take no commission on the order.

Guides

Read before you send the RFQ

Not sure this is the right category for your part? Email the drawing to and we will say plainly where it fits.

Have a wind energy drawing ready?

Send it with the destination port. Within 24 business hours we tell you which shops clear the envelope, and up to three of them quote you directly.

Get Matched With a Heavy Frame Supplier

We reply within 24 business hours.