Emsal Vana
Products / Expansion joints · 310–329 / Externally pressurized expansion joint
PRODUCT GROUP 313 · EXPANSION JOINTS

Externally pressurized expansion joint

Externally pressurized expansion joints are metal bellows expansion joints designed to absorb large axial expansion in long, straight pipelines. Because the pressure acts on the outside of the bellows, the risk of buckling under high pressure and large movements is reduced and system safety is improved.

EXTERNALLY PRESSURIZED EXPANSION JOINTTYPE 313 · EMSAL VANA
DN
25 – 250
PN
16
MATERIAL
SS316 · SS304
STANDARD
DIN
CONNECTION
EN 1092-1
TEST
10880
FLOW DIRECTION
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Externally pressurized expansion joint

Technical data

01
Nominal sizeDN25 – DN250
Pressure ratingPN16
Service temperature
−20 °C … +430 °C
Manufacturer's declaration. Exact value in the quotation.
StandardDIN
Connection typeFlanged
DesignTS 10880 DIN 30681
Face-to-face dimensionTS 10880 DIN 30681
End connection standardEN 1092-1EN 1092-1Flanges — steel flanges, PN designated ISO 7005-1ISO 7005-1Metallic flanges — steel flanges
TestTS 10880 DIN 30681

The standards listed apply to stocked products. Contact us for other standards.

Material

02

Material options for externally pressurized expansion joints are listed below.

Outer casing
SS316SS304SS321
Flange
SS316SS304ST-37
Inner pipe
SS316SS304ST-37
Outer pipe
SS316SS304ST-37
Coating
for Fe-C materials
NickelZincElectrostatic powder coatingIndustrial wet paintWRAS-approved epoxy coating

Features

03

Advantages

  • High pressure and temperature resistance
  • Design that is safe against buckling
  • Longer pipe runs with fewer expansion joints
  • Ideal for buried applications
  • Easy to insulate, protected from external influences

Applications

  • Geothermal energy lines
  • Thermal oil and steam systems
  • Underground pipelines
  • Chemical and petrochemical plants
  • Power plants
  • Hot/cold water and compressed air systems

Downloads

04
DatasheetPDF · TR/EN · dimension table, parts list
Open datasheet
CAD modelSTEP · DXF · by nominal size
IN PREPARATION
3.1 certificate samplePDF · EN 10204 · TR/EN
Open sample

Related products

05
Externally pressurized expansion joint · 313 · SS316 · DN25–DN250 · PN16