What Wessel does

Wessel GmbH Kessel- und Apparatebau is a privately held German industrial fabricator headquartered in Xanten am Niederrhein, operating three sites (Birtener Ring 30 headquarters and two factories at Bruchweg 13 and Hagdornstraße 10) with 15,200 sqm of workshop space and approximately 200 employees. The company runs two core business segments: Kesselbau (boiler construction), focused on manufacturing, conversion, redevelopment, and maintenance of boiler plants for waste recycling, surrogate fuels (EBS), biomass, wood, and conventional energy supply; and Fördertechnik (conveyor technology), delivering complete pelleting plants and material-handling systems for renewable energy, recycling, and animal feed applications. Capabilities were extended into pelleting systems in 2001 through the acquisition of WMA Maschinen- und Apparatebau GmbH, whose brand remains in use under Wessel's ownership.

Underlying technology centres on in-house pressure-equipment and welding manufacturing: collector manufacturing up to 850 mm outer diameter on CNC equipment; submerged-arc membrane wall production with bending capability up to 130° and 1,600 mm individual width; automated cladding with pulse and CMT welding on high-alloy steels; and approximately 150 welding procedure qualifications backed by 50 welders holding 500+ EN 287 performance qualifications. Quality assurance covers non-destructive testing (UT, PT, MT, RT, HT, video endoscopy), and the firm operates under ISO 9001:2015, ASME U and S, DGRL 2014/68/EU, AD 2000 HP 0/HP 100 R, DIN EN ISO 3834-2, EN 1090-2 EXC 3, SCC, and WHG approvals — a credential stack that qualifies the company as a regulated pressure-equipment manufacturer.

The business model is project-based B2B manufacturing with direct enterprise sales to waste-to-energy operators, biomass power producers, recycling facilities, chemical plants, steel mills, and feed producers across Western Europe (Germany-led). Pricing is quote-based on custom-engineered scope; revenue is generated from one-time equipment sales complemented by professional services (consultation, planning, manufacturing, assembly, commissioning) and aftermarket maintenance. Pelletising plants are delivered with Siemens S7-300/400 PLC controls and WinCC visualisation including remote-maintenance modem interfaces, embedding a long-tail service opportunity within the capital equipment base. The company is family-owned with Patrick Lensing as Managing Director (Geschäftsführer) and no disclosed external investors, M&A, or funding activity beyond the 2001 WMA incorporation.

Name

Wessel

Legal name

Wessel GmbH Kessel- und Apparatebau

Website

https://wessel-xanten.de

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

1–10 employees

Short description

Wessel GmbH Kessel- und Apparatebau is a German industrial fabricator that designs, manufactures, and services custom boiler plants, conveyor systems, and complete pelleting lines for waste-to-energy, biomass, recycling, chemical, steel, and animal feed operators across Western Europe.

Ownership category

akta.pro rank

Product category

Industrial Boiler and Apparatus Manufacturing

NAICS

Power Boiler and Heat Exchanger Manufacturing (332410), Boiler, Tank, and Shipping Container Manufacturing (3324)

SIC

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

akta.pro primary industry

Biofuel Plant EPC, O&M & Process Technology Providers (EUAAAHAK)

akta.pro secondary industries

Biomass Fuel Equipment & Systems (Pellet Mills, Briquetters, Torrefaction Reactors) (EUAAAJAH), Welding, Fabrication & Field Machining Services (On-site) (IMAIACAD)

Keywords

• Industrial boiler manufacturing
• Conveyor systems
• Pelleting equipment
• Pressure vessel fabrication
• Waste-to-energy systems

Headquarters

HQ city

Xanten

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Boiler Plant Manufacturing and Services: Custom manufacturing, conversion, redevelopment, and maintenance of boiler plants for waste recycling, surrogate fuels, and energy supply sectors. Revenue from equipment sales, installation, and ongoing service contracts.
2. Conveyor Systems and Components: Planning, manufacturing, and assembly of complete conveyor technology solutions and plant components for renewable energy, recycling, and animal feed production sectors.
3. Pelleting Systems: Pelleting systems for wood and recycling applications following incorporation of WMA Maschinen- und Apparatebau GmbH in 2001.
4. Professional Services: Consultation, planning, manufacturing, assembly, servicing, and commissioning of plants and components.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels1 record

Core offering

Wessel GmbH Kessel- und Apparatebau designs, manufactures, and assembles industrial boiler plants (Kesselbau) for waste recycling, surrogate fuels (EBS), biomass, and energy supply applications, plus conveyor technology (Fördertechnik) and complete pelleting systems for wood and recycling sectors. The company delivers full-service solutions including engineering design, in-house manufacturing with advanced welding and CNC capabilities, on-site assembly, commissioning, and ongoing maintenance. All production takes place at the company's 15,200 sqm facility in Xanten, Germany, serving large industrial clients across Western Europe.

Product overview

Wessel GmbH Kessel- und Apparatebau operates two core business segments: Boiler Construction (Kesselbau) and Conveyor Technology/Fördertechnik, with pelleting systems capabilities added through the 2001 acquisition of WMA Maschinen- und Apparatebau GmbH. The Boiler Construction segment encompasses complete boiler plants for waste recycling, surrogate fuels (EBS), biomass, and energy supply, supported by in-house manufacturing capabilities for collectors, membrane walls, pipe coils, cladding, and advanced welding technology, plus assembly and quality assurance services. The Conveyor Technology segment provides complete conveyor solutions and pelletising plants including trough chain conveyors, distributor/conveyor screws, chain conveyors, and full pelleting equipment (separators, mills, conditioning units, pellet presses, coolers) with integrated Siemens-based control and visualisation systems. All manufacturing is conducted at the company's Xanten facility on 15,200 sqm of workshop space.

Differentiator

Problem solved

Functional benefit

Products and services

• Boiler Construction (Kesselbau) Complete boiler construction services for industrial customers in waste recycling, surrogate fuels (EBS), biomass, and energy supply sectors. Includes manufacturing, conversion, redevelopment, and maintenance of boiler plants with full service from consultation through commissioning.
• Conveyor Technology (Fördertechnik) Conveyor technology solutions for renewable energy, recycling plants, and animal feed production. Includes planning, manufacturing, and assembly of complete material handling systems with capacities 30-200 m³/h for sawdust and 5-150 t/h for pellets.
• Pelleting Plant Equipment Complete pelleting systems for wood and recycling applications including separators, mills, conditioning units, pellet presses, and coolers, following the 2001 incorporation of WMA Maschinen- und Apparatebau GmbH.
• Membrane Wall Manufacturing (Membranwandfertigung) Large-scale membrane wall production service using submerged arc welding lines and plasma welding for special profiles and materials, capable of bending up to 130° with individual width of 1600mm.
• Collector Manufacturing (Sammlerfertigung) Fully equipped collector manufacturing facility processing materials up to 850mm outer diameter, featuring CNC 2-spindle collector drill, automatic NC nipple machine for TIG and submerged arc welding, CNC-controlled automatic weld edge lathe, and submerged arc circumferential seam plant.
• Pipe Coil Manufacturing (Rohrschlangenfertigung) Complex pipe geometry manufacturing service using NC and CNC press bending machines with automated continuous pipe welding for high-quality pipe coils.
• Welding Technology Services (Schweisstechnik) Advanced welding services with approximately 150 welding procedure qualifications covering nearly all material combinations and weld seam geometries, supported by 50 welders with over 500 performance qualifications per EN 287.
• Cladding Services (Schweissplattierungen) High-alloy special steel deposition welding for surface protection using automatic welding machines with pulse and CMT technology for surface and radial cladding.
• Assembly Services (Montage) On-site assembly services for boiler construction including TÜV inspections, boiler repairs, spare part installation, conversion and new construction assembly with qualified personnel.
• Quality Assurance Services (Qualität) Comprehensive quality management services including material analyses, welder acceptance testing, production checks, laboratory tests, pressure tests, non-destructive testing (UT, PT, MT, RT), and final production documentation per ISO 9001:2015 and ASME standards.
• Engineering Design Services (Konstruktion) Engineering design services from consultation through basic engineering to detailed planning using Autodesk Inventor, Mechanical, AutoCAD, Sigma ROHR2, and TÜV NORD Dimy software.
• Control and Visualization Systems (Steuerung) Complete pelleting plant control systems with switch cabinets, Siemens PLC (S7-300/400) and WinCC visualization, including built-in modems or network interface cards for remote maintenance capability and integrated data recording for analysis.
• Fördertechnik Assembly Services (Montage) Pre-assembly in factory with functional testing followed by dispatch in larger units for fast on-site assembly of conveyor technology systems, enabling predictable and short assembly times.
• Boiler Conversions and Redevelopment (Kesselumbauten und Sanierung) Modernization, conversion, and rehabilitation services for existing boiler plants in waste recycling, surrogate fuels, and energy supply applications.

Quantifiable outcome

• Membrane wall bending capability up to 130° and 1600mm individual width
• +9 more outcomes

Segments7 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators7 records

Recent moves4 records

Expansion highlights5 records

Broad incumbents

• LOOS International: German industrial steam boiler manufacturer serving food, chemical, refinery and energy customers — directly overlapping with Wessel's industrial boiler construction, conversion and maintenance services, with broader geographic coverage.
• ANDRITZ (Feed & Biofuel): Austrian global supplier of pelleting, drying and biomass processing equipment — comparable technology (pellet presses, hammer mills, conveyors, dryers/coolers) for biomass and feed, but operating at much larger international scale.
• Bosch Industriekessel: Industrial boiler and steam-system manufacturer (Bosch Thermotechnology division) — broader incumbent serving the same industrial steam/hot-water boiler market as Wessel's Kesselbau, with much larger scale and brand reach.
• Viessmann Industriekessel: Large German heating and industrial boiler manufacturer — comparable in industrial boiler Kesselbau and biomass applications but operating at significantly larger scale and broader product portfolio.

Direct peers

• Amandus Kahl: German manufacturer of pellet presses, complete pelleting plants and hammer mills — directly comparable to Wessel's pelleting-equipment line (separators, mills, conditioning, pellet presses, coolers) for wood and recycling applications.
• Weiss GmbH: German industrial boiler and heat-transfer equipment manufacturer — comparable specialized Mittelstand fabricator serving similar industrial steam/process heat customers as Wessel.
• Bühler Group: Swiss global supplier of processing equipment for feed, biomass and advanced materials, including pelleting and conveying lines — comparable technology stack and customer base to Wessel's conveyor and pelleting business, though at much larger scale.
• CPM (California Pellet Mill): Global pellet mill and process equipment manufacturer for biomass, feed and recycling — directly comparable product portfolio (pellet presses, hammer mills, conditioners, coolers) to Wessel's pelleting line, especially in wood/biomass.
• Binder GmbH (Binder-Industrieanlagenbau): German manufacturer of wood pellet production plants and process equipment — direct peer in pellet-press and complete-pelleting-plant offerings overlapping with Wessel's WMA-inherited pelleting line.
• Münch-Edelstahl: German maker of pellet mills and ring-die systems — closely comparable to Wessel's pellet-press products serving wood-pellet and feed markets with similar throughput ranges.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/wessel-gmbh-kessel--und-apparatebau

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Subsidiaries1 record

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 Wessel