BOLTED AND WELDED CLAMP-TYPE REPAIR WITH RECESSED BOLTS

Abstract

The present model refers to a bolted and welded clamp-type repair with bolts and nuts housed in recessed locations that will be hermetically insulated by welding plugging discs to be used in the repair and maintenance of pipes. The clamp-type repair comprises a lower part (1) and an upper part (2) that will perfectly accommodate the pipe, wherein said lower part (1) and upper part (2) each comprise a flanged portion (3) at both ends, and the flanged portions (3) each comprise at least one recess (4) to accommodate the bolt-nut assembly (7) where the plugging discs (8) will be positioned immediately above. The welding process of the edges between the same and next to the pipe (12) and the plugging discs (8) next to the surface of the flanges (3) guarantee the necessary safety and enable the repair to be defined as permanent, without the need for later replacement.

Claims

1. A bolted and welded clamp-type repair with recessed bolts comprising: a lower part comprising: a circumferential edge; a longitudinal edge; and a flanged portion; an upper part, comprising: a circumferential edge; a longitudinal edge and; a flanged portion; wherein the flanged portion of the lower part and the flanged portion of the upper part each comprise at least one recess to accommodate at least one bolt-nut assembly; and one or more plugging disks positioned immediately above the bolt-nut assembly and welded next to the surface of the flange of the upper part and; wherein the circumferential edges of the lower part and the upper part are welded to a pipe and wherein the and longitudinal edges of the upper and lower flanges are welded together.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0025] In order to obtain a total and complete visualization of the object of this model, the figures to which references are made are presented, as follows.

[0026] FIG. 1 shows the repair containing the chamfers that will later receive welding in addition to the flanges with the container where the nuts and bolts will be allocated.

[0027] FIG. 2 shows the repair previously installed in a pipe detailing its welding locations, the nuts and bolts positioned and the plugging discs.

[0028] FIG. 3 shows the repair installed in a pipe with details of the plugging discs housed in the places that will be welded.

[0029] FIG. 4 shows a real example of the repair being used in a pipe, but before performing the welding process.

[0030] FIG. 5 shows a real example of the repair being used in a pipe in its final process, after welding.

DETAILED DESCRIPTION OF THE MODEL

[0031] The present model presents a repair for metallic pipes (12) of the bolted and welded clamp-type containing bolts and nuts (7) hermetically housed in recesses (4) present in the flanges (3) contained in the lower part (1) and upper part (2) of the repair.

[0032] The clamp-type repair comprises a lower part (1) and an upper part (2), preferably in a similar shape to a semicircle, in order to perfectly accommodate the pipe of interest (12), in which said lower part (1) and upper part (2) each comprise a flanged portion (3) at both ends, wherein said flanged portions (3) comprise at least one recess (4) to accommodate the bolt-nut assembly (7) in which they will be hermetically insulated after positioning immediately above the plugging discs (8), which will later be welded next to the surface of the flanges (3).

[0033] Thus, the use of the proposed repair begins with the positioning of the lower part (1) and upper part (2) in the pipe of interest (12) at the damage site. Subsequently, the tightening of the assembly of bolts and nuts (7) is carried out so that both the nuts and the bolts must be completely accommodated/housed inside the recesses (4) contained at the ends of the portion of the flanges (3).

[0034] After the correct positioning and fixation of the aforementioned parts, the circumferential edges (6) immediately in contact with the pipe of interest (12), are formed by the union of the lower part (1) and upper part (2), and the longitudinal edges (5) are formed by joining the flanged portions (3) of the lower part (1) and upper part (2), wherein the circumferential edges (6) and longitudinal edges (5) are welded between the same and next to the pipe (12).

[0035] The plugging disks (8) are positioned in the recesses (4) in order to cover/seal the hole where the bolt-nut assemblies are located.

[0036] Finally, the longitudinal edges (5), the circumferential edges (6) and the plugging discs (8) are subjected to the welding process, in order to achieve the proposed complete seal and ensure the permanent character of the repair, wherein the longitudinal edges (5) and circumferential edges (6) are welded together and next to the pipe (12) and the plugging discs (8) are welded next to the surface of the flanges (3). In this way, and as can be seen in FIGS. 3 and 5, the parts necessary for complete sealing are already presented with the welding process completed, namely: the welded circumferential edges (9), the welded longitudinal edges (10) and the welded plugging discs (11), thus guaranteeing the desired complete seal.

[0037] It should be emphasized that to enable welding of the circumferential edges (6) and longitudinal edges (5) of the clamp, the repair was preferably produced using a material of high weldability, except for the bolts and nuts that are naturally manufactured in very low weldability material, a feature that motivated the design of this repair. The figures demonstrate that the notches (chamfers) are already machined in the fabrication of the proposed clamp-type repair to allow for welding and ensure a resistant section.

[0038] Furthermore, the dimensions of the repair are variable, obeying the diameter of the pipe of interest (12) and the loads that must be submitted to. In addition, the number of recesses (4) contained in the flanges (3) is not fixedly defined, but the flange must have at least one recess (4) for the use of at least one bolt-nut assembly (7) and consequently have the longitudinal edges (5) to be welded between the same and next to the pipe (12).