Stainless steel mill and press plant: cold forming of stainless steel, pipe fittings, flanges and pressure vessel components
KREMO-WERKE Hermanns GmbH & Co KG
KrefeldNew on Amplifa
Expertise in stainless steel for over 90 years
KREMO-WERKE Hermanns GmbH & Co KG is a stainless steel mill and press plant based in Krefeld. The focus is on the cold forming of stainless steel using punching, deep-drawing and flaring/spinning technology. The company manufactures pipe accessories such as reducers, weld neck flanges, Klöpper bottoms, caps, pipe bends and tees, as well as flanges, jacket-heated flanges with accessories, sight glass fittings and aerated concrete anchorings – plus individual custom-made products according to customer drawings. The in-house production depth includes its own toolmaking, presses and punching with 25 to 2500 tonnes of press force, automatic lathes, flaring/spinning machines, vacuum annealing systems, as well as a welding and pickling shop with inspections carried out in-house. Materials processed include stainless steels such as 1.4301 to 1.4571, Duplex, 904L, as well as aluminium, copper, titanium, Hastelloy, Inconel and Monel. Customers are found in piping construction, plant engineering, pressure vessel construction, chemistry and process engineering, as well as in the aerated concrete industry.
- Site
- Krefeld
- Processes
- Punching technology (punched parts), Deep-drawing technology, Flaring/spinning technology, Cold forming / pressing (25 to 2500 tonnes of press force), Automatic lathe turning, Toolmaking, Welding (TIG up to 4 mm, root pass TIG / cover pass manual electrode, welding automatons, Pickling
- Materials
- 1.4301 / X5CrNi18-10 / 304, 1.4307 / X2CrNi18-9 / 304L, 1.4401 / X5CrNiMo17-12-2 / 316, 1.4404 / X2CrNiMo17-12-2 / 316L, 1.4435 / X2CrNiMo18-14-3, 1.4462 / X2CrNiMoN22-5-3 / Duplex, 1.4539 / 904L, 1.4541 / X6CrNiTi18-10 / 321
- Certificates
- Quality assurance system for material manufacturers (Directive 97/23/EC, punched, Welding approval DIN 4100 Part 2, DIN 4115, AD2000-Merkblatt HP O (incl. HP 2/1, HP 3, HP 4), TÜV approval for, TÜV Rheinland QA system for material manufacturers (97/23/EC), AD2000 HP O incl. HP 2/1, HP 3, HP 4 (pressure vessels, TÜV)
- Industries
- Piping construction, Plant engineering, Pressure vessel construction, Chemical/process engineering, Aerated concrete industry
- 01
Toolmaking
- 02
Cutting up to 20 mm wall thickness
- 03
Punching and deep-drawing technology
- 04
Flaring/spinning technology
- 05
Automatic lathes
- 06
Welding shop
- 07
Vacuum annealing
- 08
Pickling shop
- 09
Inspection and acceptance in-house
Krefeld site
Krefeld
DEHeadquarters, stainless steel mill and press plant
- Materials
- Stainless steel, steel, aluminium, copper, titanium, nickel alloys
- Presses and punching 25–2500 t
- Automatic lathes
- Flaring/spinning machines
- Vacuum bell furnaces
- Welding automatons (pulsed-arc/MIG)
- Toolmaking
Components and product range
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Punching technology (punched parts)Forming | – | – | – | – | Stainless steel, 1.4301, 1.4541, 1.4571, 1.4404, 1.4307, 1.4435, 1.4539, RSt 37-2, S235JRG |
| Deep-drawing technologyForming | – | – | – | – | Stainless steel |
| Flaring/spinning technologyForming | – | – | – | – | Stainless steel |
| Cold forming / pressing (25 to 2500 tonnes of press force)Forming | – | – | – | – | Stainless steel, RSt 37-2 |
| Automatic lathe turningMachining | – | – | – | – | Stainless steel |
| ToolmakingEngineering | – | – | – | – | – |
| Welding (TIG up to 4 mm, root pass TIG / cover pass manual electrode, welding automatonsJoining | – | – | – | – | Stainless steel 1.4301-1.4571, high-alloy structural steels |
| PicklingSurface | – | – | – | – | Stainless steel |
| Cutting of stainless steel up to 20 mm wall thicknessMachining | – | – | – | – | Stainless steel |
| Vacuum annealing / contract annealing (scale-free, stress-relief annealing, normalizing, solutionHeat treatment | – | – | – | – | Stainless steel |
| Manufacture of pipe fittings (reducers, bends, tees, caps, Klöpper bottoms,Forming | S-dimensions: +15.0%/-12.5%; outside diameter: ±0.75% | – | – | – | 1.4301, 1.4541, 1.4571, 1.4404, 1.4435, 1.4539, 1.4307/304L, 1.4404/316L, RSt 37-2 |
| Manufacture of pressure vessels and pressure vessel components (TÜV approval AD2000 HP O)Casting | – | – | – | – | Stainless steel |
| Mix-up testing (spectral analysis)Testing | – | – | – | – | – |
| Surface crack testing (metal-Check per AD2000 HP 4)Testing | – | – | – | – | – |
| X-ray inspectionsTesting | – | – | – | – | – |
| Penetrant/visual testing (PT/VT)Testing | – | – | – | – | – |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Presses and punching | – | – | 25 to 2500 tonnes of press force | – | Krefeld |
| Automatic lathes | – | – | – | – | Krefeld |
| Flaring/spinning machines | – | – | – | – | Krefeld |
| Vacuum annealing systems (vacuum bell furnaces) | – | – | – | – | Krefeld |
| Welding automatons (pulsed-arc/MIG) | – | – | – | – | Krefeld |
Additional services
Quality and approvals
TÜV Rheinland confirms with certificate no. 01 202 617/Q-00 0014 a quality assurance system for material manufacturers in accordance with Directive 97/23/EC for punched and deep-drawn parts. Works inspections include mix-up checks by spectral analysis, surface crack testing (metal-Check per AD2000 HP 4), X-ray inspections as well as penetrant and visual testing (PT/VT); delivery with acceptance inspection certificates 3.1/3.2 per EN 10204.
| Evidence | Krefeld |
|---|---|
| TÜV Rheinland QA system for material manufacturers (97/23/EC) | |
| AD2000 HP O incl. HP 2/1, HP 3, HP 4 (pressure vessels, TÜV) | |
| Welding approval DIN 4100 Part 2, DIN 4115 |
Company history
Founded with over 90 years of tradition at the Krefeld site
Specialized in the processing and forming of stainless steel for more than half a century