Lens expansion joints

Lens expansion joints are single-walled metal expansion joints in single or multi-shaft variations with lower expansion and very robust construction. These consist of one or several semi-circles that are welded into corrugation peaks and troughs with circular seams.

Lens expansion joint parameters
Bellows materials	C steel (S235JR) elevated temperature steels (P265GH, 16Mo3, 13 CrMo 44, etc.) high-alloyed steel (1.4401, 1.4541, 1.4571, 1.4828, etc.) various Ni alloys (2.4858, 2.4858, etc)
Connection parts	without additional connection parts Weld ends Fixed/Swivel flanges
Media	Fluids Gases abrasive media and solids
Nominal widths	DN50 to DN9000 (in circles) any size in oval cross-sections
Operating temperature	up to 1000°C
Pressure levels	PN1 to PN100
Construction shapes	circular oval Special shapes
Inner protection tube	Variations with or without inner guide tube and/or Guide tube possible
Movement absorption	axial lateral angular Combinations thereof

Overview of expansion joints

Show all metal expansion joints