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Axial expansion joints to compensate axial displacements

Axial expansion joints are often used to compensate axial displacements occurring due to thermal deformations, pressure differences, vibrations and inaccuracies of equipment installation. Compression and expansion of axial expansion joints absorb these changes of length and protect a piping from damages.
VZM manufactures axial expansion joints in accordance with international standards and customer’s specification.

Main technical characteristics

ДиаметрNominal diameter, (DN), mm 25 – 1200
Давление рабочееWorking pressure (PN), bar From vacuum up to 75 bar (for DN 25)
Давление пробноеTest pressure (PT), bar 1,5 × PN or according to customer’s specifications
ТемператураMedia temperature, °С From -196 °С to +550 °С
Up to 100 000 cycles (upon confirmation of technical specifications with a customer).
РесурсBellow materials
AISI 321, AISI 304, AISI 316L and their equivalents

Types of axial expansion joints

With welded ends

With welded flanges

With loose flanges

With a case

With an internal sleeve

Order according to your drawing or filled questionnaire

Benefits for our customers

  • We handle all customs procedures ourselves and we deliver ready-to-use products with all certificates to customer’s door;
  • We have our own warehouse on EU territory and can maintain stock for our customers;
  • We accept different payment schemes;
  • Our full cycle production provides the highest quality and reliability due to quality control on every stage of production;
  • The plant accepts orders for production from one unit;
  • The plant develops special solutions in accordance with customer’s specification;
  • Optimal lead times for standard products and special solutions both;
  • The products are in full compliance with European norms and regulation, which is confirmed by ISO 9001:2008 certificate;


  • Certificate and declaration of conformity to the regulations of the Customs Union
  • GOST certificate
  • License for production of equipment for facilities, complexes and installations with nuclear materials designated for production, processing and transportation of nuclear fuel and materials
  • License for designing the equipment for nuclear installations
  • ISO 9001:2008 certificate (issued by TÜV Rheinland)

Ordering axial expansion joints

VZM manufactures and supplies as large series of bellow expansion joints as single units. You can order our products in the way that is most convenient to you – you can select our standard axial expansion joint from the Table below or use E-mail, phone or online form. Do not hesitate to contact us if you have any questions or need special solution.