METHOD OF MANUFACTURE OF BELLOWS COMPENSATOR FOR PIPELINES Russian patent published in 2000 - IPC

FIELD: civil engineering. SUBSTANCE: bellows compensator is used in high-pressure gas pipelines. Multilayer half-corrugations with sections of larger external radius 1, of smaller internal radius 2, with counter-chamfer, and of cylindrical form are manufactured by stamping. Then half-corrugations are assembled in pairs by end 5 of cylindrical-form sections 3, and power rings 4 are mounted between them with interference along internal surfaces of sections of smaller internal radius 2 and sections of cylindrical form 3. Ends 5 are welded to rings 4 and half- corrugations are welded to rings of radius 1, thus forming torus-shaped bellows compensator. Ends 6 are welded through ring 7. EFFECT: extended service life. 3 cl, 2 dwg