Residual stress reduction in welding
AssigneeAvure Technologies AB
InventorsMats Gardin, Stefan Sehlstedt
Life of this patent
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Abstract
A pressure vessel comprising a pressure chamber (5) arranged for accommodating a pressure medium, comprising at least one cylinder segment (2) arranged for longitudinal connection to form a cylinder body (1), whereby a joint (7) arranged for an interconnection is formed at adjacent longitudinal edges (6) of the at least one cylinder segment. The pressure vessel further comprises pre-stressing means (20) provided around an outer envelope surface (4) of the cylinder body for radially pre-stressing the cylinder body and for at least partly decreasing a gap (11) extending along at least a portion of each joint between adjacent longitudinal edges of the at least one cylinder segment.
Claims15
A pressure vessel comprising a pressure chamber (5) arranged for accommodating a pressure medium, comprising
- at least one cylinder segment (2) arranged for longitudinal connection to form a cylinder body (1), whereby a joint (7) arranged for an interconnection (12) is formed at adjacent longitudinal edges (6) of the at least one cylinder segment, and
- pre-stressing means (20) provided around an outer envelope surface (4) of the cylinder body for radially pre-stressing the cylinder body and for at least partly decreasing a gap (11) extending along at least a portion of each joint between adjacent longitudinal edges of the at least one cylinder segment.
A method for producing a pressure vessel comprising a pressure chamber (5) arranged for accommodating a pressure medium, providing at least one cylinder segment (2) arranged for longitudinal connection to form a cylinder body (1), whereby a joint (7) arranged for an interconnection (12) is formed at adjacent longitudinal edges (6) of the at least one cylinder segment, the method comprising the steps of:
- providing a gap (11) extending along at least a portion of each joint between adjacent longitudinal edges of the at least one cylinder segment, and
- pre-stressing an outer envelope surface of the cylinder body for radially pre-stressing the cylinder body, wherein the gap extending along the joint between the adjacent longitudinal edges of the at least one cylinder segment at least partly decreases when pre-stressing the cylinder body.
Dependencies are inferred from the claim text.