METAL EXPANSION JOINT AND VIBRATION ABSORBER APPARATUS FOR PIPE SYSTEMS

摘要

The apparatus includes a bellows (1), a first protection sleeve element (8) having a substantially radially upturned annular end portion (13) and a second protection sleeve element (6) having also a substantially radially upturned end portion (17). The bellows (1) ends at both sides in a neck (2, 3). A cylindrically shaped portion (12) of the first protection sleeve element (8) is surrounded by an envelope part (9) having a cylindrically shaped portion (10) and a substantially radially upturned annular end portion (11). Likewise, a cylindrically shaped portion (25) of the second protection sleeve element (6) is surrounded by an envelope part (14) having a cylindrically shaped portion (15) and a substantially radially upturned annular end portion (16). The necks (2, 3) of the bellows (1) are sandwiched between the cylindrically shaped portions (10, 12; 15, 25) of the respective envelope parts (9, 14) and the first protection sleeve element (8) and the second protection sleeve element (6) are welded thereto. The upturned end portions (11, 13; 16, 17) of the respective envelope parts (9, 14) and the first (8) and second protection sleeve elements (6) contact each other and form the flanges (4, 5) of the apparatus.