What Welders does

Welders N.V. is a Belgian privately-held manufacturer of custom-built pressure and process equipment, founded in 1948 in Brussels and relocated to Aalst in 1975, where it operates a 15,000 m² production facility (6,000 m² covered) with up to 40-ton lifting capacity. The company specializes in designing and fabricating equipment in high-performance alloys — titanium, zirconium, nickel alloys, duplex/super duplex stainless steels, and clad materials — engineered to operate in corrosive atmospheres and at high temperatures. Its installation base includes more than 1,200 large-capacity heat exchangers (with exchange surfaces exceeding 3,500 m² and up to 4 m diameter) and an active reference list spanning more than 75 countries, serving process operators and EPCs in the oil & gas, chemicals, petrochemicals, fertilizers, gas processing, and related process industries.

The product range is organized around six core categories: heat transfer equipment (heat exchangers, coolers, condensers, evaporators), reactors, columns and towers, combustion equipment (burners, air nozzles, quench rings, flare tips), fabricated components (tube bundles, channels, internals, spare parts), and shop-fabricated piping and fittings. Production relies on in-house design and engineering using internationally recognized software for thermal rating, stress analysis, wind load, and seismic calculations, paired with advanced fabrication capabilities including Flux Cored Arc Welding (FCAW), computer-controlled and automatic welding beams, and orbital welding for tube-to-tubesheet joints up to 4 m diameter. Quality credentials include ISO 9001:2015 certification (originally obtained 1994), ASME U-Stamp authorization (since 1998), and qualification as an approved supplier to Saudi Aramco (since 2004), with familiarity across ASME, EN, AD-Merkblatt, RToD, CODAP, TEMA, API, and NACE codes.

Welders operates an engineered-to-order business model with no publicly disclosed pricing; all projects are custom and quote-based following technical specification and supplier qualification, producing long sales cycles. Revenue is generated from four streams: (1) custom equipment design and fabrication projects, (2) supply of critical spare parts and retrofitted components, (3) on-site and workshop repair services, and (4) specialized heat treatment. Go-to-market is direct enterprise sales to end-user operators and EPC firms, supported by a network of engineering partners such as Topsoe A.S. (Denmark) and GS Construction Arabia (Saudi Aramco projects), with global delivery managed in-house by the company's expediting department. The company has been owned since 2008 by Dutch holding company Aslan Partners B.V., operates with 11–50 employees, and shows no public revenue or recent capital-raise disclosure.

Name

Welders

Legal name

Welders n.v.

Website

https://welders.be

Company type

Private

Founded year

1948

Operating status

Operating

Headcount range

11–50 employees

Short description

Welders N.V. is a Belgian custom manufacturer designing and fabricating pressure and process equipment — heat exchangers, reactors, columns, burners, piping, and components — in exotic alloys (titanium, zirconium, nickel, duplex stainless) for oil & gas, chemical, petrochemical, fertilizer, and gas processing operators worldwide.

Ownership category

akta.pro rank

Product category

Pressure and Process Equipment Manufacturing

NAICS

Power Boiler and Heat Exchanger Manufacturing (332410), Power Boiler and Heat Exchanger Manufacturing (33241), Fabricated Pipe and Pipe Fitting Manufacturing (332996)

SIC

Fabricated Plate Work (Boiler Shops) (3443), Industrial Process Furnaces & Ovens (3567)

akta.pro primary industry

Boilers, Furnaces & Process Heating Equipment (IMAHAKAD)

Keywords

• Custom pressure equipment
• Process equipment fabrication
• Heat exchanger manufacturing
• Corrosion resistant alloys
• Industrial vessel fabrication

Headquarters

HQ city

Aalst

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Equipment Design & Fabrication: Welders generates revenue through the design, engineering, and fabrication of custom-built process equipment (heat exchangers, reactors, columns, combustion equipment, pipework, fabricated components) in heat- and corrosion-resistant alloys. Projects are bespoke, with pricing based on technical specifications and scope.
2. Spare Parts & Component Supply: Fabrication of critical spare parts, retrofitted or redesigned to original specifications, at competitive prices. These are sold as one-time purchases tied to existing customer equipment.
3. Repair Services: On-site and workshop-based repair solutions for defective equipment, including welding issue resolution, testing, plugging/refurbishment of heat exchangers. Flexible teams and a large stock of special alloy materials enable rapid response.
4. Specialized Heat Treatment: Specialized heat treatment services are offered as an additional service to customers requiring specific material properties in fabricated equipment.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Welders N.V. designs, engineers, and fabricates custom-built pressure vessels and process equipment — including heat exchangers, reactors, columns/towers, combustion equipment, piping, and spare parts — primarily in heat- and corrosion-resistant alloys such as titanium, zirconium, nickel alloys, and duplex stainless steels for the oil & gas, petrochemical, chemical, and fertilizer industries. Each unit is engineered to order against client specifications and international codes, supported by in-house heat treatment, repair, and spare-part services.

Product overview

Welders is a specialized manufacturer of custom-built process equipment in heat- and corrosion-resistant alloys. The company operates as a single-product focused business rather than a platform-plus-modules architecture, with its production range centered around six core product categories: Heat Transfer Equipment (heat exchangers, condensers, evaporators, coolers), Reactors, Columns and Towers, Combustion Equipment, Fabricated Components, and Shopfabricated Piping and Fittings. All products share a common thread—the use of high-performance alloys such as titanium, zirconium, nickel alloys, duplex stainless steels, and specialized stainless steels. The company also offers design and engineering services, quality assurance, transportation logistics, and repair solutions as value-added services.

Differentiator

Problem solved

Functional benefit

Products and services

• Heat Exchangers Custom-designed and fabricated heat exchangers built in heat- and corrosion-resistant alloys (titanium, zirconium, nickel alloys, duplex stainless steels) for oil & gas, petrochemical, chemical, and fertilizer process plants.
• Reactors Custom-engineered reactors fabricated to client specifications and international codes for harsh-service chemical, petrochemical, and fertilizer process applications.
• Columns and Towers Custom-built process columns and towers used in separation, distillation, and related process services in oil & gas, petrochemical, chemical, and fertilizer plants.
• Combustion Equipment Custom combustion equipment and burner components designed and fabricated in heat- and corrosion-resistant alloys for high-temperature industrial process service.
• Piping and Fabricated Components Custom piping and welded fabricated components in exotic alloys supplied as complementary items to pressure and process equipment packages.
• Repair and Spare Parts Services Repair, refurbishment, and spare parts services for pressure and process equipment, including field repair support and heat treatment, provided to operators in the company's served industries.

Quantifiable outcome

• Over 75 countries served globally with references in process industries worldwide
• +3 more outcomes

Named customers24 records

Segments9 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered minor, core and supporting.

• Welders Filtration Technology N.V. (WFT)minorOthers · 1 January 1990WFT was spun off from Welders in 1990 as a majority-owned subsidiary specializing in industrial filter presses. In 2008, WFT became completely independent. WFT is described as a neighboring company on Welders' contact page, with WFT specializing in design, fabrication, installation, and maintenance of industrial filter presses.
• GS Construction Arabia Co. Ltd / GS Engineering and ConstructioncoreChannel Partner/ Reseller/ DistributorGS Construction Arabia Co. Ltd and GS Engineering and Construction act as the primary coordinating engineering company for Welders' project with Saudi Aramco's SRU Upgrade. They awarded and coordinated the contract for 16 high-performance heat exchangers, managing the interface between Welders as equipment supplier and Saudi Aramco as end-user.
• Topsoe A.S. (Denmark)coreStrategic or Co-development PartnerTopsoe A.S. is a Danish catalyst and process technology company that regularly engages Welders for the fabrication of combustion equipment, reactor internals, and process components supplied to end-users in the USA, Nigeria, Poland, Qatar, Bangladesh, Russia, Uzbekistan, Indonesia, Malaysia, Saudi Arabia, Peru, Canada, and other countries. Welders has supplied multiple burner, reactor, and sleeve orders through Topsoe's process technology packages.
• Highly Respected Testing Companies and LaboratoriessupportingOthersWelders cooperates with highly respected companies and laboratories to carry out the necessary tests guaranteeing the quality of products, including NDE (visual, penetrant, radiographic inspection), PMI (Positive Material Identification), and hydrostatic testing.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Regional players

• Funke Wärmetauscher: German specialist in shell-and-tube, plate, and welded heat exchangers for chemical, petrochemical, and refinery applications. Highly comparable product range, but with primary focus on the German and broader European market rather than Welders' global EPC-driven footprint.
• Chaplin Bros: U.K.-based custom fabricator of pressure vessels, heat exchangers, and process equipment in stainless, carbon, and exotic alloys for oil & gas, chemical, and pharmaceutical customers. Similar small-batch, heavy-fabrication profile but with primarily U.K. and Western European focus.

Direct peers

• Joseph Oat & Co. U.S. custom fabricator of heat exchangers, pressure vessels, columns, and reactor components in carbon, stainless, and high-performance alloys for refining, chemical, and power-generation customers. Comparable in scope, customer mix, and heavy-fabrication capability.
• Pfaudler: Long-established manufacturer of glass-lined and stainless-steel reactors, columns, and process equipment for the chemical and pharmaceutical industries. Comparable in custom-engineered process equipment for corrosive-service applications, though specializing in glass-lined technology.
• Holtec International: U.S. engineering and manufacturing firm producing heat exchangers, pressure vessels, and process equipment for the energy, nuclear, and petrochemical sectors. Comparable in heavy fabrication of high-integrity custom equipment for demanding service conditions.
• Graham Corporation: U.S.-based specialty manufacturer of heat exchangers, condensers, and pressure vessels for the chemical, petrochemical, refining, and defense markets. Highly comparable to Welders in serving process industries with mission-critical fabricated equipment, though Graham is publicly listed (NYSE: GHM).
• Hamon: Belgium-headquartered global supplier of cooling and heat-transfer solutions, including air-cooled condensers, heat exchangers, and cooling towers for power and industrial customers. Operates from a similar European base and serves overlapping process-industry end markets.
• De Dietrich Process Systems: European designer and manufacturer of custom process equipment — including reactors, columns, heat exchangers, and dryers — built in corrosion-resistant alloys (glass-lined, stainless, special alloys) for the chemical and pharmaceutical industries. Closely mirrors Welders' custom-engineering approach and target verticals.

Broad incumbents

• Alfa Laval: Global Swedish incumbent in heat transfer, separation, and fluid handling — a broad portfolio of plate, shell-and-tube, and welded heat exchangers across virtually every process industry. Overlaps with Welders' heat-exchanger business but at vastly greater scale and a wider product portfolio.
• API Heat Transfer: U.S.-headquartered manufacturer of heat exchangers (shell-and-tube, plate, air-cooled) and thermal management products for chemical, petrochemical, power, and HVAC markets. Overlaps in industrial heat-exchanger fabrication but with a broader, more standardized catalog than Welders' bespoke model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

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Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Welders