Seamless tube plants

Tube and pipe making
Future-oriented plant designs

Wherever you look, seamless steel tubes are an integral part of modern life. Today, the oil and gas industry, the construction and mechanical engineering industries, and automotive manufacturers demand ever better tubes made of higher steel grades, with closer tolerances and new dimensions.

Ever since the Mannesmann brothers' radical invention in 1885, SMS group has continuously improved the seamless tube production process. That has put us one step ahead of current and future requirements of the pipe and tube market. Take for example our PQF® (Premium Quality Finishing) process and its innovative technology packages. This innovative power proves we offer you competitive solutions for seamless tubes.

Seamless tube plant process

The right solution for all process stages

Piercing, elongating, and finish-rolling - these are the key stages in seamless tube production. SMS group has the right machines for every stage, and covers the whole range of processes.

Seamless tube plant process slider image

Starting Material

Steel billets of various dimensions and grades, continuously cast or rolled

  • Billet preparation
  • Billet saws
  • Furnace technology 
  • Billet centering
Seamless tube plant process slider image


from the billet to the hollow

  • Cross-rolling mills (cone type and Barrel type piercing)
  • Billet descaling
  • 3-roll piercing mill
  • Hollow inside deoxidation
  • Cooling and quick-change systems for piercing tools
Seamless plant tube process slider image

Elongating / expanding

from the hollow to the shell

  • PQF® / MPM mill
  • CPE/TPE mill / Push bench technology 
  • Assel mill
  • Plug mill
  • Hot pilger mill
  • Elongator
  • Rotary Expander
Seamless plant tube process slider image

Finish rolling

from the shell to the tube

  • Reheating furnace (gas fired/induction)
  • High pressure water descaling unit 
  • Sizing mill
  • Stretch-reducing mill
  • FPS adjustable rolling stands
  • Tube layer saws
Seamless plant tube process slider image

Finishing line

From the rolling mill to the dispatch area

  • Groove dressing machines for PQF® catridges
  • Stretch-reducing and sizing mill stands
Seamless plant tube process slider image


Seamless tubes of various dimensions

  • Diameters: 
    21.3 mm to 720 mm 
  • Wall thicknesses:
    2 mm to 120 mm



Advanced mandrel mill technology for premium quality finishing

Whether it's high-alloy steels or particularly thin-walled precision tubes - with our PQF® (Premium Quality Finishing) technology, you can produce even the highest-grade products efficiently and reliably. You also use less material to generate better output than with conventional solutions. That ensures tool cost plus energy savings due to the low reheating required during the rolling process.

Typical size ranges / deformation steps of PQF® mills
Plant dimension 7"9 5/8" / 10 3/4"16" / 20"
Billet Diameter [mm] 210 200 - 280210 - 360 / 450
Diameter range Finished tube [mm] 48,3 - 177,8 42,4 - 244,5  (273,1)177,8 - 406,4 / 508
Wall thickness [mm] 3,2 - 223,6 - 255,6 - 40
capacity [tons / year]
> 200.000  > 300.000> 400.000

Your benefits from the PQF® process at a glance

  • You can roll higher-alloyed steel grades
  • Temperature distribution in the shell is more uniform after the
    elongation rolling process
  • Reduced "finning" at the shell end for lower crop end losses
  • Closer wall thickness tolerances
  • Higher tube quality
  • Lower manufacturing costs
SMSgroup Image SMSgroup Image

Technical highlights

SMSgroup Image

Furnace technology for seamless tube plants

Experienced specialists in tube rolling, re-heating, and heat treatment

Seamless tube plants technical highlights image

BCM - Billet centering machines

Optimized rolling process with centered piercing

Seamless tube plants technical highlights image

PQSC® Technology

Better plug material and less thermal load

Seamless tube plants technical highlights image


Innovative scale protection in seamless tubes

Seamless tube plants technical highlights image


An all-new measuring principle

Seamless tube plants technical highlights image

Lasus® measuring system

Precise measurements for high quality all round

Seamless tube plants technical highlights image

Carta® technology system

Computer-aided rolling technology - seamless integration, all-round innovation

Seamless tube plants technical highlights image

Groove dressing machine

Latest-generation roll dressing machines

Selected References

Electrical and automation systems



Mehr Verlässlichkeit im Antriebsstrang dank Antriebstechnik der SMS group.

Weitere Informationen


Digitale Dokumentation: Der erste Schritt zur Digitalisierung

Weitere Informationen

Unterstützung im Notfall – Remote Service

Zur schnellen Identifikation von Defekten und Fehlfunktionen und umgehenden Einleitung von Maßnahmen, die Störungen beseitigen.

Weitere Informationen

Equipment Check

Regelmäßige Inspektionen und Wartungen sind Grundlage zur Sicherung der Anlageneffizienz.

Weitere Informationen

Langfristige Wartungsdienstleistungen

SMS group bietet Ihnen Service entlang der Wertschöpfungskette und Sie können sich ganz auf Ihre Kernkompetenzen konzentrieren.

Weitere Informationen

Wartung und Instandhaltung

Unter Zustandsüberwachung verstehen wir die fortwährende Analyse von Maschinen während der Produktion.

Weitere Informationen


Das IMMS (Integrated Maintenance Management System) garantiert eine effektive und wirtschaftliche Wartung.

Weitere Informationen

Safety Locator

Schützen Sie Ihr wertvollstes Kapital - Ihre Mitarbeiter – mit dem SMS group Safety Locator.

Weitere Informationen

Smart Maintenance

Digitalisieren Sie Ihre Instandhaltung mit SMS group.

Weitere Informationen



SMSgroup Wilms, Michael

Michael Wilms

SMS group GmbH
Head of Seamless Tube Plants
Ohlerkirchweg 66
41069 Mönchengladbach

Telefon : +49 2161 350 1842

SMSgroup Topüth, Manfred

Manfred Topüth

SMS group GmbH
Service Seamless tube plants
Ohlerkirchweg 66
41069 Mönchengladbach

Telefon : +49 2161 350 2603
Fax : +49 2161 350 1980