PRESSURE BALANCED EXPANSION JOINTS WITH WELD ENDS
Excellent reliability, no ageing, absence of permeability, resistant to corrosion, high working temperature.
In conformity with EJMA (Expansion Joint Manufacturer Association) Standards, movements are calculated for 3000 complete cycles at nominal pressure.
Bellows in stainless steel 1.4541 EN10028-7 (AISI 321).
Weld ends in carbon steel.
On request, other grades of stainless steel.
– Single or multi-ply metal corrugated bellows.
– Ends: weld ends.
The corrugations are formed by a PLC controlled automatic process.
The special forming process, free from friction and lamination, allows constancy and accuracy of the corrugation profile with minimal material yielding.
– Pneumatic leak test (standard)
– Hydraulic test, specific dimensional controls, non-destructive tests, material certificates of main pressure bearing parts (on request)
Correction of static offsets and compensation for thermal expansion and movements.
Gas and steam turbines.
Stainless steel -200° ÷ 550°C .
For expansion joints with structure in carbon steel -20° ÷ 350°C .
For a temperature range 50° ÷ 550°C performances (movements, working pressure, n° of cycles) must be reduced by applying the relevant coefficients (See document N205 Derating factors”).
For a temperature range higher than 550°C, please contact our Technical Department.