
Planning, manufacturing and turn-key construction of plants for the storage and processing of liquid and solid materials.

Ingenieurbüro Quade GmbH
Bad EssenNew on Amplifa
About IQ
Ingenieurbüro Quade GmbH (IQ) is an owner-managed family business based in Bad Essen-Rabber that has been active in plant engineering and process technology since 2000. The company plans, manufactures, installs and services plants for the storage and processing of liquid and solid materials – from individual components to turnkey production plants as general contractor. Its service portfolio includes engineering and permitting design, tank farm construction, steel construction, piping (including double-pipe-in-pipe systems), production plants, pigging systems, filling and dosing technology, extraction and production supply technology as well as control and automation technology with in-house control cabinet construction. Welding fabrication in steel and stainless steel (processes 111, 133, 141) is carried out on an 8,000 m² company site with 1,200 m² of manufacturing space in three halls; pilot plant construction and trial operation are possible at the company's own works. Customers come from the paint and coatings industry, the chemical industry, the automotive sector and the paper industry. Engineers, technicians, CAD specialists and plant fitters cover all areas from design to commissioning in-house.
- Site
- Bad Essen
- Processes
- Tank farm construction, Steel construction, Piping construction (including double-containment piping systems, execution per AD2000, HP100R), Production plant construction, Pigging systems (single/double pigging systems), Special plant construction (custom one-off production, pilot plant construction, trial operation at, Filling and dosing technology, Production supply technology (extraction systems, process extraction, extraction systems for dusts
- Materials
- Steel, Stainless steel, Plastics, Steel (material group 1.2 per CEN ISO/TR 15608), Stainless steel/alloyed steel (material group 8 per CEN ISO/TR 15608), Welding processes (manual arc, MAG, TIG welding)
- Certificates
- EN ISO 3834-3, AD 2000 datasheet HP0 (manufacturer and welding company per AD 2000 rules,, EN 1090-2 EXC2 (welding certificate), EN 1090-1 factory production control (CE marking, system 2+), WHG specialist company per §62 AwSV, AD 2000 datasheet HP0, EN 1090-2 EXC2, EN 1090-1 (CE, system 2+), WHG specialist company §62 AwSV
- Founded
- 2000
- Industries
- Paint and coatings industry, Chemical industry, Automotive, Paper industry
- 01
Engineering/permitting design
- 02
Welding fabrication (steel/stainless steel)
- 03
Control cabinet and control system construction
- 04
On-site installation
- 05
Commissioning/trial operation
- 06
Maintenance and (remote) service
Materials & Processes
Steel
For tank farms, steel structures and welded components, also galvanized or painted, material group 1.2 per CEN ISO/TR 15608.
Stainless steel
For piping, filling and dosing technology as well as plant components, material group 8 per CEN ISO/TR 15608.
Plastics
Used in piping construction, also in double-containment piping systems.
Welding processes (manual arc, MAG, TIG welding)
Certified welding fabrication of steel and stainless steel components per EN ISO 3834-3.
Site

Bad Essen
DEAdministration and manufacturing
- Materials
- Steel, stainless steel, plastics
- 3 manufacturing halls (1,200 m²) with a divided workshop for stainless steel and steel processing as well as storage
- Electrical workshop for control cabinet construction
- Pilot plant construction and trial operation at the company's own works
- 125 kWp photovoltaic system
Components & Plants









Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Tank farm constructionAssembly | – | – | – | – | Steel, Stainless steel |
| Steel constructionAssembly | – | – | – | – | Steel, Stainless steel |
| Piping construction (including double-containment piping systems, execution per AD2000, HP100R)Assembly | – | – | – | – | Stainless steel, Steel, Plastics |
| Production plant constructionAssembly | – | – | – | – | – |
| Pigging systems (single/double pigging systems)Assembly | – | – | – | – | – |
| Special plant construction (custom one-off production, pilot plant construction, trial operation atAssembly | – | – | – | – | – |
| Filling and dosing technologyAssembly | – | – | – | – | Stainless steel, Steel |
| Production supply technology (extraction systems, process extraction, extraction systems for dustsAssembly | – | – | – | – | – |
| Control cabinet constructionAssembly | – | – | – | – | – |
| Control and automation technology (circuit diagram creation, PLC programming, visualization,Engineering | – | – | – | – | – |
| Welding fabrication of steel and stainless steel components (manual arc welding 111, MAGJoining | – | – | – | – | Steel (material group 1.2 per CEN ISO/TR 15608), Stainless steel (material group 8 per CEN ISO/TR 15608) |
| Engineering / design in plant construction (permitting design, design up to turn-key plantEngineering | – | – | – | – | – |
| Turn-key plant constructionAssembly | – | – | – | – | – |
| Maintenance and repair of plantsAssembly | – | – | – | – | – |
Additional services
Quality & Certifications
Welding fabrication is certified per EN ISO 3834-3 and AD 2000 datasheet HP0/HP 100R by TÜV Rheinland; for load-bearing steel structures the company holds certification per EN 1090-2 EXC2 with CE marking per EN 1090-1. As a specialist company under the German Water Resources Act (WHG) per §62 AwSV, the company works with qualified welding supervisory personnel (IWE) and regular specialist training courses.
| Evidence | Bad Essen |
|---|---|
| EN ISO 3834-3 | |
| AD 2000 datasheet HP0 | |
| EN 1090-2 EXC2 | |
| EN 1090-1 (CE, system 2+) | |
| WHG specialist company §62 AwSV |
History
- 2000
Company founded, location Lindenstraße 119 in Bad Essen
- 2003
Set-up of a rented workshop, location Buersche Straße in Barkhausen
- 2006
Purchase of the company premises and construction of the administration building, relocation to Bad Essen/Rabber
- 2008
Extension of the office buildings, construction of building no. 8
- 2009
Construction of the first manufacturing hall; awarded the "Special Prize for Energy" of the Federal Environment Foundation
- 2011
Expansion of the site to 8,000 m² and of manufacturing hall 1; construction of manufacturing halls 2 & 3
- 2013
Extension of building no. 8 with a conference room
- 2016
Commissioning of the 125 kWp photovoltaic system
- 2022
Katja and Erik Quade join the company succession
- 2023
Katja and Erik Quade take over the management of Ingenieurbüro Quade GmbH
- 2025
25th anniversary