STENFLEX® develops, produces and supplies flexible pipe connections to customers worldwide.

The company’s product portfolio includes rubber and steel expansion joints, PTFE expansion joints, fabric expansion joints, pipe connectors, hoses, swivel joints and rubber-metal bearing elements.

For the past 50 years, industrial pipeline construction applications have relied on flexible pipe connections by STENFLEX®, the specialists for high quality construction elements in:

  • Nuclear power plants, conventional power plants and large-scale plant construction
  • Heating, ventilation and air conditioning, as well as drinking water and waste water engineering
  • Mechanical engineering, motor production, industrial equipment construction
  • Shipbuilding and ships chandlers, as well as the foodstuffs and chemical industries

Three features set STENFLEX® expansion joint technology apart. It is entirely maintenance-free, highly reliable in application and extremely durable. This means that operators can rely on our expansion joints for cost-effectiveness and sustainability.

STENFLEX rubber expansion joints in cooling water system of a power plant.
STENFLEX rubber expansion joints in a power station.
Restrained STENFLEX steel expansion joints in a transformer plant.
STENFLEX swivel joints installed in a pump test facility.
Regular inspections after installation of expansion joints on demand.

STENFLEX® stands for delayed material ageing, with protective components, absolute and sustained flange-sealing and ease of installation. Add to this high resistance to pressure surges thanks to vulcanised reinforcing materials made of synthetic fibres and steel wire, all at maximum cost-effectiveness.

Our range of expansion joints, swivel joints and industrial hoses includes products with nominal diameters from 15mm to 3600mm, nominal pressure ratings up to PN40 (swivel joints up to maximum PN420) and temperature resistance ratings from -196°C to 900°C, suitable for all solid, liquid and gaseous media.

Connections parts (that deviate from DIN) such as ISO, ANSI, VG, SAE standards etc. are also available.

Steel expansion joints

STENFLEX® steel expansion joints vary according to the following criteria:

  • Type (universal / lateral / angular expansion joints)
  • Pipe connection type (flange, welding end or threaded connection)
  • Material quality of the bellows (rated to the media)
  • Bellows structure (rated to movement, pressure and temperature)

STENFLEX® expansion joints are delivered ready for installation in nominal widths DN 15-DN 3400 and for nominal pressure rates up to PN 25. A wide range of materials is used, with temperature resistance from -196° C to +900°C.

Rubber expansion joints

Rubber expansion joints differ according to the following criteria:

  • Type (universal / lateral / angular expansion joints)
  • Pipe connection type (flange, thread)
  • Rubber quality of the bellows (rated to the media)
  • Bellows structure (rated to pressure and temperature)

STENFLEX® Rubber expansion joints are delivered ready to install in nominal widths DN 20-DN 3600 and for nominal pressure rates up to PN 25. A wide range of materials is used, with temperature resistance up to +110° C.

PTFE-expansion joints

STENFLEX® PTFE expansion joints are particularly suitable for aggressive media. PTFE is resistant to almost all chemicals and solvents.

STENFLEX® PTFE expansion joints are used in machinery, industrial equipment and piping systems. They are established in the following industry sectors: chemicals, process engineering, foods, beverages, pharmaceuticals, waste and disposal technology as well as IT.

Swivel joints

STENFLEX® swivel joints are used in applications involving liquid and gaseous media. The swivel joints can be used as flexible pipe connectors under the most demanding conditions and can withstand extreme temperature and pressure.

STENFLEX® swivel joints are highly suitable for absorbing oscillations. Swivel motion can be handled as well as complete rotation at low speed.

Our swivel joints can be used in a wide range of applications, including:

  • Loading and swivel arms
  • Pipe joint tongs
  • Hydraulic fluid supply lines
  • Mill and rolling stands
  • Sewage treatment aeration tanks
  • Filling applications out in the open
  • Steel and rolling works

Industrial hoses

STENFLEX® hoses provide safe connections whether in process technology, offshore applications, mechanical engineering, building engineering or as part of supply systems.

Functions at a glance:

  • Noise and vibration transmission
  • High absorption of lateral and angular movement
  • Compensate for installation inaccuracies
  • Reduce thermal and mechanical tension

Quality and service

STENFLEX® flexible pipe connections are designed and dimensioned in compliance with national and international regulatory standards. The optimum quality of STENFLEX® products has been confirmed by approval bodies and independent test institutes worldwide.

To ensure that our products and processes continue to remain at a consistently high level in future, we work in compliance with ISO 9001:2008.
Many of our products have achieved KTA 1401 approval for use in nuclear plants.

STENFLEX® has attained all major and approved national and international manufacturer certificates, component tests and special Certificates of Competence. Our production processes are based on the ISO 9001:2008 quality management system, which has been in use throughout our organisation for a number of years.