EX Type
expansion joints

EX Type <br/>expansion joints For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Item Description
1 Inlet / line pipe
2 Outer casing
3 Bellows
4 Guide ring
5 Flange
  • Untied metal expansion joints for general pressure applications.
  • Externally pressurized design.
  • Designed for, and cover the mid temperature and pressure range for general process equipment.
  • Intended for large axial movements.
  • Self-guiding design – internal rings guide the movement of the expansion joint.
  • Self-cleaning / draining – no deposits inside convolutions because the bellows element is externally pressurized.
  • The pressure does not produce column squirm (stability ensured at higher pressure).
  • Highly customizable design: Bellows geometry, Material options and combinations.
  • Multiply bellows with low spring rate and high cycle life.
Diameter: DN 40 ... DN 1,600 (1.5" ... 63”)
Temperature: ... 550 °C (1,022 °F)
Pressure: max. 50 barg (1,160 PSIG)
  • Bellows: 1.4541 (AISI 321); 1.4301 (AISI 304); 1.4306 (AISI 304L); 1.4401 (AISI 316); 1.4404 (AISI 316L); 1.4571 (AISI 316Ti); 1.4828 (AISI 309); 1.4547 (254 SMO); 2.4816 (Inconel® 600); 2.4856 (Inconel® 625/LCF); 1.4876 (Incoloy® 800/H)
  • Connections: 1.0038 – (S235JRG2); 1.0460 – (P250GH); 1.0315 – ; 1.0254 (P235TR1); 1.0425 – (P265GH); 1.5415 – (16Mo3); 1.7335 – (13CrMo4-5); 1.4401 (AISI 316); 1.4404 (AISI 316L); 1.4541(AISI 321)
  • Flanges: 1.0038 - S235JRG2; 1.0425 - P265GH; 1.0315 - P235G2TH; 1.0254 (P235TR1); 1.0425 - P265GH; 1.5415 - 16Mo3; 1.7335 – 13CrMo4-5; 1.4404 (AISI 316L); 1.4436 (AISI 316)


Other materials are available on request.
Design code:
EJMA 9, PED 97/23/EC according to: EN 13480, EN 13445, EN 14917, AD2000 and ASME B31.3


NDT and documentation:
According to PED 97/23 EC rules and regulations (declaration of conformity).
Documentation can be provided per customer request e.g.:
- Test, measurement or calculation reports
- Material test or inspection certificates
- Design, type or 3rd party approval
  • Refining technology
  • Oil and gas industry
  • Power plant technology
  • Pulp and paper industry
  • Shipbuilding
  • Water and waste water technology
  • Water cooling systems
  • Air and steam transport lines
Untied metal expansion joints require guide and support from adjacent equipment or structure.