AN Type
expansion joints

AN Type
expansion joints

AN Type <br/>expansion joints
Item Description
1 Weld end
2 Hinge
3 Lug
4 Bellows
5 Liner

AN Type
expansion joints

Features

  • Tied custom metal expansion joints for general pressure applications.
  • Designed for, and cover the mid temperature and pressure range for general process equipment.
  • Mainly for angular movements.
  • Tied metal expansion joints retain pressure thrust developed by internal pressure, through the use of hardware.

Advantages

  • Short build in length
  • Universally applicable
  • AN types do not require anchor points being designed for obtaining pressure thrust, due to the installed hardware.
  • Highly customizable design: Bellows geometry, material options and combinations.
  • Multiply bellows with low spring rate and high cycle life.

Operating range

Diameter: DN 40 ... DN 1,600 (1.5" ... 60”)
Temperature: ... 700 °C (1,292 °F)
Pressure: max. 50 barg (1,160 PSIG)

Materials

  • 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.

Standards and approvals

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

Notes

Tied metal expansion joints might require alignment guides to ensure the expansion joint only see the intended movements.



Product variants

AN1: Tied single hinged expansion joints
Equipped with a hinge. Designed for single plane angular movements. Shown with weld ends, lugs with hinges.
AN2: Tied single gimbal expansion joints
Equipped with a gimbal. Designed for multi plane angular movements. Shown with weld ends, carrier rings with gimbal.

Similar products

AX Type expansion joints

  • Untied custom metal expansion joints for general pressure applications.
  • Designed to cover the mid temperature and pressure range for general process equipment.
  • Mainly intended for axial movements.
  • Multiply bellows with low spring rate and high cycle life.

CB Clamshell metal expansion joints

  • Bellows or expansion joints split into longitudinal segments for installation without opening pipework.
  • Temporary repair solution for damaged expansion joints.
  • Can handle axial, lateral and angular movements.
  • The permissible combination and magnitude of movements depends on the application and the existing expansion joint that is to be repaired.

DH1S Danmuff metal expansion joints

  • Untied metal expansion joints mainly for district heating applications.
  • External shroud with torsion protection, for district heating.
  • Can be installed in series.
  • Designed for large axial movements.
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