AXIAL ESPANSION 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 indicated in the technical tables 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 or nickel alloys
– Single or multi-ply metal corrugated bellows
– Ends: flanges, weld ends, other types according to customer’s
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.
Internal sleeves from rolled and welded austenitic stainless steel plate (nickel alloys on request)
– 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
Superheated water, steam, diathermic oil, gas and inflammable fluids lines; gas and steam turbines, blast furnaces, converters, exhaust gas lines, tank trucks loading and unloading , cryogenic installations, solar energy systems.
Stainless steel -200° ÷ 550°C .
For expansion joints with weld ends 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.