What Wilhelm Maass does

Wilhelm Maass GmbH is a privately held German manufacturer of forged and machined stainless steel and exotic alloy flanges, founded in 1940 and headquartered in Essen. The company operates as the parent of the Maass Global Group, with production facilities in Germany (Essen) and India (Pune) and a network of wholly owned trading and sales offices in the United Kingdom, Netherlands, Canada, Singapore, the United Arab Emirates, and China. Its product portfolio covers welding neck, slip-on, blind, orifice, lap joint, threaded, and socket weld flanges in dimensions from DN 10 to DN 2200 (1/2" to 102") and pressure classes from PN 6 to PN 400 / ASME 150# to 2500#, manufactured in materials ranging from austenitic stainless and duplex/super duplex grades to nickel-based alloys and heat-resisting steels.

The business is B2B and project-driven, with direct sales targeting national oil companies, international oil companies, EPC contractors, and petrochemical operators across more than 20 countries. Revenue is generated through custom quotation-based pricing on one-time project orders and multi-year supply contracts, supplemented by value-added services including ITP management, client inspections, packaging, and logistics. Customer approvals are concentrated in oil & gas — Saudi Aramco, Shell, ADGAS, ADCO, ADMA-OPCO, ZADCO, PDO, KOC, TotalEnergies, and EIL — with additional project references spanning LNG, FPSO, offshore, and petrochemical deployments.

The company's competitive position rests on NORSOK M-650 Rev. 4 qualification across multiple material grades, ISO 9001:2015 and PED 2014/68/EU certifications, and complementary approvals from DNV, Lloyd's Register, ABSA, Bureau Veritas, and NSF/ANSI/CAN 61. The company is managed by Managing Directors Patrick Maass and Marcel Hollmach, operates without disclosed external equity backing, and provides ongoing apprenticeship programs in sales, shipping, and production planning to sustain its workforce.

Name

Wilhelm Maass

Legal name

Wilhelm Maass GmbH

Website

https://wmaass.de

Company type

Private

Founded year

1940

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Industrial Flanges and Pipe Fittings Manufacturing

NAICS

Fabricated Pipe and Pipe Fitting Manufacturing (332996), Machine Shops; Turned Product; and Screw, Nut, and Bolt Manufacturing (3327)

SIC

Miscellaneous Fabricated Metal Products (3490), Bolts, Nuts, Screws, Rivets & Washers (3452)

akta.pro primary industry

Specialty & Alloy Steel (Stainless, Tool Steel, Electrical Steel, High-Strength/HSLA) (IMAKABAJ)

Keywords

• Forged steel flanges
• Stainless steel flanges
• Alloy flange manufacturing
• Industrial pipe flanges
• Oil and gas fittings

Headquarters

HQ city

Essen

HQ country

Germany

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Flange Manufacturing and Sales: Manufacture and sale of forged and machined stainless steel and exotic alloy flanges. Products range from small to large dimensions with varying materials in diverse pressure ranges. Additional services include preprocessing, project management support, ITP management, packaging, client inspections, and logistics services.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Wilhelm Maass GmbH manufactures and sells forged and machined stainless steel and exotic alloy flanges in sizes from DN 10 to DN 2200 and pressure classes up to PN 400 / Class 2500. The product range covers welding neck, slip-on, blind, orifice, lap joint, threaded, socket weld, and reducing flanges. The company also delivers preprocessing, ITP management, project management support, packaging, client inspections, and logistics as part of its project services to global oil & gas, petrochemical, and LNG customers.

Product overview

Wilhelm Maass GmbH is a leading manufacturer of stainless and alloy flanges, offering a comprehensive portfolio of forged and machined flanges in various types including Weld Neck, Slip On, Blind, Orifice, Lap Joint, Threaded, and Socket Weld flanges. The company supplies products from small to large dimensions across diverse pressure ranges (PN6 to PN400 in DIN; 150# to 2500# in ASME), utilizing various material standards including ASTM/ASME materials, heat resisting steels, austenitic stainless steels, fine grain structural steels, and duplex/super duplex alloys. The product line is complemented by project management support, preprocessing, and logistics services from planning through activation phase.

Differentiator

Problem solved

Functional benefit

Products and services

• Welding Neck Flanges Flanges with a long tapered hub and gradual thickness transition at the butt-weld joint, preferred for severe service conditions including high pressure and sub-zero or elevated temperatures. Used in oil & gas, petrochemical, and LNG piping.
• Slip-On Flanges Flanges with lower initial cost and easier alignment, with calculated strength under internal pressure approximately two-thirds that of welding neck flanges. Used in lower-pressure piping applications.
• Blind Flanges Flanges used to blank off the ends of piping, valves and pressure vessel openings. Subject to high stress from internal pressure and bolt loading.
• Orifice Flanges Flanges with radial tapped holes for orifice meter connections, used to measure flow rate of liquids and gases in process piping.
• Lap Joint Flanges Flanges used with lap joint stubs in services requiring frequent dismantling for inspection and cleaning, common in chemical and food-grade piping.
• Threaded Flanges Flanges used where assembly without welding is required, particularly in extremely high pressure services.
• Socket Weld Flanges Flanges developed for small-size, high-pressure piping applications, with fatigue strength 50% greater than double-welded slip-on flanges.
• Project Management and Logistics Services End-to-end project support services from planning to activation phase including ITP management, preprocessing, packaging, client inspections, and logistics for global oil & gas, petrochemical, and LNG projects.

Quantifiable outcome

• NORSOK M-650 certification valid until 2028 for multiple material grades (F44, F51/F60, F53, F55)

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• Integrity Stainless and Alloy Ltd.coreOthersPart of Maass Global Group network. Based in Rotherham, UK. Specialized manufacturer and stockist of underwater pipelines and pipe accessories in standard and special sizes for oil and petrochemical industry. Uses AutoCAD, Pro/ENGINEER (CREO), and proprietary CAD-CAM software for design and development.

Scale indicators1 record

Recent moves9 records

Expansion highlights5 records

Direct peers

• Melesi S.p.A. Italian forged stainless steel and exotic alloy flanges producer serving petrochemical, oil & gas, and LNG end markets. Comparable on NORSOK-grade exotic alloy work and project-based OEM/EPC supply.
• Erne Fittings GmbH: Austrian manufacturer of butt-weld fittings and forged steel flanges with global oil & gas and power-industry reach. Directly comparable on materials (stainless, duplex, alloy), pressure classes, and project-driven sales motion.
• Bonney Forge Corporation: US-based manufacturer of forged steel fittings and flanges serving oil & gas, power, and petrochemical markets. Closely comparable on product mix (forged fittings/flanges), customer base (IOCs/NOCs), and certification-led go-to-market.
• Eisenwerk Würth GmbH: German forged fittings and flanges manufacturer with a focus on stainless, duplex, and nickel alloys for industrial process applications. Most direct geographic and product peer to Wilhelm Maass in the German-speaking market.
• Texas Flange & Pipe Supply: US-based flange and pipe fitting distributor/manufacturer supplying oil & gas, petrochemical, and power customers with a similar product breadth (weld neck, slip-on, blind, threaded) and project-driven fulfillment.
• Tectubi Raccordi S.p.A. Italian manufacturer of butt-weld fittings and flanges in carbon, alloy, and stainless steels for oil & gas, power, and petrochemical projects. Comparable on forged product range and EPC-driven order book.

Broad incumbents

• Vallourec S.A. Global tubular solutions provider for oil & gas, with premium connection and pipe products serving many of the same IOC/NOC customers. Comparable on end-market exposure and certification requirements, though materially larger and broader in scope.
• Butting Group: Larger German stainless steel pipe and component manufacturer with broader scope (pipes, spools, fittings). Comparable on stainless material expertise and European industrial customer base, though its offering extends well beyond flanges.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks4 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/maass-global-group

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries7 records

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 Wilhelm Maass