Shear lugs. The twist restraints ensure the positioning of the dynamic clamps in the expected direction of force and are practically unloaded. Even in a load case no lateral forces worth mentioning develop, as the friction forces at the contact surface of the piping under load ensure firm positioning. Due to the minimal forces to be absorbed, the weld seam stresses can be kept low, despite the small dimensions of the twist restraints. As a rule they lie 25 % below the yield strength / creep stress limit for load case H, in accordance with the DIN / ASME permissible values. In the case of shear lugs, the material must be specified! The materials specified for shear lugs are available ex-stock and can be supplied at short notice. The customer holds responsibility for both the piping material on hand and the weld seam dimensions!
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