A PIPING SYSTEM

Abstract

The present invention provides a piping system (1) at least comprising a main pipeline (2) and a side branch pipeline (3), wherein the side branch pipeline (3) meets the main pipeline (2) at a junction (4), wherein the side branch pipeline (3) is provided with a perforated plate (5) having a plurality of perforations (6), wherein the perforated plate (5) has a downstream half (5B) and an upstream half (5A) (relative to the flow direction in the main pipeline (2)), wherein the downstream half (5B) has less open area than the upstream half (5A), and wherein the perforated plate (5) is provided with a protrusion (8), at the side of the perforated plate (5) facing away from the junction (4).

Claims

1. A piping system at least comprising a main pipeline and a side branch pipeline, wherein the side branch pipeline meets the main pipeline at a junction, wherein the side branch pipeline is provided with a perforated plate having a plurality of perforations, wherein the perforated plate has a downstream half and an upstream half relative to the How direction in the main pipeline, wherein the downstream half has less open area than the upstream half, and wherein the perforated plate is provided with a protrusion, at the side of the perforated plate facing away from the junction.

2. The piping system according to claim 1, wherein the side branch pipeline is closed at the end not meeting at the junction.

3. The piping system according to claim 1, wherein the perforated plate is arranged substantially perpendicular to the longitudinal axis of the side branch pipeline.

4. The piping system according to claim 1, wherein the percentage of open area in the perforated plate is between 25% and 75%.

5. The piping system according to claim 1, wherein the perforated plate is placed at a distance of 0 to 15 side branch pipeline diameters from the junction.

6. The piping system according to claim 1, wherein the protrusion divides the perforated plate into a zone with perforations and a zone free of perforations.

7. A perforated plate, wherein the perforated plate has a plurality of perforations and wherein the perforated plate is provided with a protrusion.

8. The perforated plate according to claim 7, wherein the percentage of open area in the perforated plate is between 25% and 75%.

9. The perforated plate according to claim 7, wherein the protrusion divides the perforated plate into a zone with perforations and a zone free of perforations.

10. The piping system according to claim 1, wherein the piping system suppresses flow-induced vibrations.

Description

[0037] Hereinafter the present invention will be further illustrated by the following non-limiting drawings. The same reference numbers refer to the same or similar components. Herein shows:

[0038] FIG. 1 schematically a cross-sectional view of a piping system according to the present invention;

[0039] FIG. 2 a perspective view of a perforated plate (not according to the present invention but included for further illustration of the present invention); and

[0040] FIG. 3 a perspective view of an embodiment of a perforated plate according to present invention.

[0041] FIG. 1 shows a cross-sectional view of a piping system generally referred to with reference number 1. The piping system 1 comprises a main pipeline 2 with a NPS (nominal pipe size) diameter of 48 inch, two side branch pipelines 3 (one with an NPS diameter of 12 inch and one with an NPS diameter of 18 inch), a junction 4 and a perforated plate 5 having a plurality of perforations. The side branch pipelines 3 meet the main pipeline 2 at the respective junctions 4. In the embodiment of FIG. 1, the side branch pipelines 3 are closed at the respective ends not meeting at the junctions 4. The perforated plates 5 are placed at a distance from the junction 4 of 0.95 and 0.70 side branch pipeline diameters, respectively for the upstream located (12 inch NPS) side branch pipeline and the downstream located (18 inch NPS) side branch pipeline.

[0042] The flow direction in the main pipeline 2 (which also defines the above-mentioned relative upstream and downstream location of the side branch pipelines) has been indicated by means of an arrow.

[0043] FIGS. 2-3 show two distinct embodiments of the perforated plate 5. It appeared thatin operationthe perforated plate of FIG. 3 resulted in significant reduction of pipe vibrations when compared with the perforated plate of FIG. 2.

[0044] In the embodiment of FIG. 2 (which is not according to the present invention), the perforated plate 5 has a regular pattern of perforations 6 arranged in a triangular pitch. In addition to the perforations 6, flanging bolt holes 7 are shown. The perforated plate 5 of FIG. 2 has an open area of 42% (whilst ignoring the open space as provided by the flanging bolt holes 7, as these latter holes 7 do not add to the open area when installed in the side branch pipeline 3).

[0045] In the embodiment of FIG. 3 according to the present invention, the perforated plate 5 has an open area of 42% (again, whilst ignoring the open space as provided by the flanging bolt holes 7). Further, the perforated plate 5 of FIG. 3 is provided with a protrusion 8 (when installed in the piping system 1 at the side of the perforated plate 5 facing away from the junction 4). In the embodiment of FIG. 3, the protrusion 8 is in the form of a ridge which divides the perforated plate 5 into a zone 5A with perforations 6 and a zone 5B free of perforations. When installed in the piping system 1, zone 5B is downstream of zone 5A relative to the flow direction in the main pipeline 2.

[0046] The person skilled in the art will readily understand that many modifications may be made without departing from the scope of the invention.