We are looking for you as reinforcement

Welder UP
incl. autogenous jointing
E-hand / MIG / MAG
Operator 3 or 4
Roller bending machine
Plant mechanic
Specialization in apparatus engineering
Assembler / Pre-assembler
with welding skills
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A tradition for over 50 years

Our company was founded in 1971 by Friedhelm Schmelzer and has developed into a renowned medium-sized company. Over the past decades, the company has succeeded in firmly establishing itself in the industry with a large customer base. Since then, we have been known in particular as a reliable supplier and partner in a wide range of metalworking sectors.



We have particularly high standards:We offer the highest quality materials, a large repertoire of approvals and certifications such as ISO 9001, DIN 1090, AD-HP0 and DIN EN ISO 3834-2.


Strengthened by specialized and qualified employees who are highly motivated to implement your wishes, we can offer a high degree of on-time delivery at attractive prices.



The many customer-specific and order-related challenges in particular enable us to develop our expertise daily. Thanks to our many years of experience, we have perfectly organized production processes and can deliver top-quality products.



Short organizational channels within the company often enable flexible action and rapid implementation of customer-specific special requests. Take advantage of our many years of experience in the planning, forming, welding and mechanical finishing of cones in particular, but also pipes and fittings of all kinds.

Challenge us, we deliver what we promise!

Thanks to our motivated and qualified team, we can often make the impossible possible – and at a reasonable and attractive price. Our sales department is responsible for the technical and organizational processes of Schmelzer GmbH & Co. It ensures high-quality product manufacturing with the claim to planned and tested quality in conformity with given customer requirements.

For inquiries and further information information, we are always available to support you as a permanent contact partner. at your disposal.
Please feel free to send us your request and/or your specific inquiries directly:

Testing company

In close cooperation with certified testing companies for non-destructive and destructive material testing, we guarantee the specified product requirements in accordance with customer specifications and technical regulations and thus offer continuous, equivalent quality assurance for our products.

Heat treatment

Heat treatment is carried out directly in-house in our gas-powered oven. For example, the following heat treatments can be offered independently and flexibly:

  • Stress-relief heat treatment
  • Normalization annealing
  • Annealing
200 mm to 4500 mm diameter
Wall thickness 5 mm to 80 mm
Height / Width to 3000 mm
Length to 21.000 mm
Weight to 15.000 kg

The dimensions shown here apply to pipes and tank shells, pipe fittings and for welded constructions of all kinds in steel and mechanical engineering.

The dimensions shown are in relation to diameter-wall thickness-length and may deviate from the specified values.

Special sizes are available on request. Simply contact our sales staff directly:

You can easily reach us at:
Phone: +49 27 64 93 52 0


Structural steels according to EN 10025
Heat-resistant steels EN 10028-2
EN 10216-2
Fine-grained structural steels EN 10028-3
EN 10208
EN 10217
Hydrogen pressure resistant Steels SEW 590
Stainless steels EN 10028-7
EN 10088
Clad steels AD-W8
Heat-resistant steels SEW 470
Duplex and super duplex steels 1.4462
Offshore special steels according to
Wear-resistant steels N 10137
Hardox 400/500
XAR 400/450
ABRAZO 400/500
Creusabro 4000
Dillidur 400/500

Nickel-based alloys Monel

Thermomechanical steels EN 10113

ASTM materials according to e.g. A 106
A 204
A 240
A 387
A 515
A 516

API materials e.g.

5 LX 52 to X 70

Pipe fittings

A small excerpt from our product portfolio:
  • Concentric reducers
  • Eccentric reducers
  • T-pieces with vertical and angled spigot outlets
  • Segment pipe bend
  • Transition elbow
  • Saddle support
  • Y-pipes
  • Y-pieces
  • Special pipe fittings
  • Transition pieces of any kind (e.g. round to square)

Pipes and tank shells

From 200 to 4500 mm in diameter, we can produce all standard sizes as well as customized sizes. With a wall thickness of 5 to 80 mm, there are virtually no limits to even the most extreme loads. Lengths of up to 3000 mm can be produced without a round seam. With round seams, we are even able to produce lengths of up to 21,000 mm and a total weight of up to 15,000 kg.

Special sizes are of course also available on request. Let our product gallery below convince you of our services.

Welded constructions Mechanical engineering

Pipes, cones, pipe-cone connections with or without flanges, made of duplex or super duplex are just a few examples from our product portfolio:
  • Fitting housing
  • Pump housing
  • Bypass dampers for process gas coolers
  • Conical screw conveyors
  • Drums for cutter / centrifuge
  • Races
  • Drill heads for civil engineering

Welded steel structures

We have been an approved supplier in the offshore renewable energy sector for over 20 years. Our subcomponents can be found in various constructions above and below sea level. These include, for example:

  • Longitudinally welded conical support structures
  • Conical supports in conjunction with round tubes
  • Conical pylon support structures
But we are also at home in other sectors. Among other things, we are a supplier to a world market leader in the manufacture of mobile harbor cranes. Our products are not only found in the regional and national market, our products are installed worldwide via our large international customer base. 
H5 - Stahlbau

Product gallery

Get in touch now:

Schmelzer GmbH & Co KG
In der Welsmicke 9
D-57399 Kirchhundem

Phone: +49 27 64 93 52 0
Fax: +49 27 64 93 52 39


Registration court: Siegen Local Court
Register number: HRA 6582

VAT number: DE126182516


  • Leave the A45 at the Olpe exit
  • Turn left on the B54/55 in the direction of Winterberg / Lennestadt
  • After approx. 9 km turn right towards Kirchhundem
  • Follow the road for approx. 4 km
  • Turn left onto the L711 in the direction of Kirchhundem/Welschen Ennest
  • After approx. 3 km you leave the village of Rahrbach behind you
  • The “In der Welsmicke” industrial estate is now on the right-hand side.
  • Our company is located at the end of the long industrial estate.