DE102022103490A1 - Multiple turning device for large diameter steel pipes - Google Patents

Abstract

The invention relates to a multi-rotation device for rotating pipes with a large diameter about their longitudinal axis, having a base frame and a plurality of rollers which are lined up next to one another on the base frame, each roller having a roller axis and an axis of rotation running through the axis of the roller and the axes of rotation of the Rollers run parallel to each other and parallel to the longitudinal axis of a tube mounted on the rotary device. The multiple rotating device has 6 to 10 rollers, the axes of rotation of the rollers being arranged on a circular arc. In one embodiment, the multiple turning device has an adapter bracket per roll. The rotating device can be adapted to a different pipe diameter using the adapter brackets. With the rotating device according to the invention, it is possible to rotate pipes with pipe diameters of at least 6 m safely and without damage, despite their weight and size, without causing dents or damage to the pipe surface. The multiple rotating device has sufficient load-bearing capacity for the pipes, even for the large pipe dimensions and weights.

Description

The invention relates to a multi-turn device according to the preamble of claim 1.

Large pipes, in particular made of longitudinally and circumferentially welded sheet steel, with a considerable diameter are used, for example, in the oil industry or in the manufacture of large metal structures. An important area of application is the construction of foundations for offshore plants, especially wind turbines. For large pipes that are used in the offshore sector, e.g. as monopiles or tripods, pipe diameters of more than 6 m and now more than 9 m are no longer uncommon. These large pipes are very thin-walled in relation to the pipe diameter.

Before use, the pipes are manufactured in various work steps and prepared for use. For use in the offshore area, for example, anti-corrosion coatings are applied to protect the pipe from corrosion in salt water. Given the dimensions of the tube, the coating is done while the tube is lying. In order to be able to coat the entire surface, the tube must be rotated around its longitudinal axis during the coating process. For this purpose, the pipe is placed on rotating devices. The rotating devices must have sufficient load-bearing capacity to be able to carry the very large and heavy pipes. Since the tubes only have a small wall thickness compared to the large diameters and high masses, they have a low radial rigidity. Therefore, there is a risk that denting or damage to the surface of the tube will occur during storage on the rotating device or during rotating. When turning the tube, too high stresses can also occur on the tube, which lead to irreversible damage to the tube. Many conventional rotating devices already do not have sufficient load-bearing capacity against the background of the current large pipe weights. Most turning devices are also designed for exactly one pipe diameter, so that different turning devices have to be kept ready for pipes with different pipe diameters.

DE 1 777 106 A1 describes a welding carriage for use in longitudinal seam welding of large diameter pipes. The large pipe welding system is equipped with pipe rotating devices, each consisting of a frame with two driven rollers, with the axes of the rollers being parallel to the longitudinal direction of the welding carriage. To rotate the tube, two pairs of rollers are provided, which rest in the outer lateral area of the tube.

DE 25 20 686 A describes a support device for pipes which allows adaptation to different pipe diameters. In the device, rollers are pulled like a garland onto a steel cable that is attached to a supporting structure in a freely suspended manner. When the pipe is placed on the garland, the rollers position themselves according to the pipe diameter and thus allow safe and non-destructive storage. However, due to the support structure with steel cable, the support device is not suitable for modern large pipes with pipe diameters of more than 6 m, as these are too heavy.

The object of the invention is to provide a rotating device that overcomes the above disadvantages and, in particular, enables pipes, such as monopiles or steel pipes, with a diameter of at least 6 m to be rotated safely and evenly, without deformation of the pipe, such as indentations, indentations and on which rotation does not violate the structural integrity of the pipe.

Main features of the invention are set out in the characterizing part of claim 1.

Further embodiments are the subject matter of the subclaims or are described below.

The multiple rotating device according to the invention serves to rotate pipes with a large diameter, such as monopiles, large pipes, large pipe sections or steel pipes, about their longitudinal axis. The multi-turn device has a base frame and a plurality of rollers. The rollers are lined up side-by-side on the base frame, each roller having a roller axis and an axis of rotation passing through the axis of the roller, the axes of rotation of the rollers being parallel to one another and parallel to the longitudinal axis of a tube supported on the rotary device. The base frame is preferably mobile and can be transported using a crane or a lifting vehicle. The multiple turning device according to the invention has 6 to 10 rolls, preferably 8 rolls. The axes of rotation of the rollers are arranged on an arc of a circle, with the arc of a circle having an angle of at most 135°, preferably 120°, preferably less than or equal to 90°. The arc of a circle that passes through the axes of rotation of the rollers preferably has a radius greater than or equal to the radius of a pipe mounted on the rollers. With conventional steel pipes, the radius is at least 3 m, corresponding to a pipe diameter of at least 6 m. The rollers form the support points for a pipe mounted on the rotating device, so that when a pipe is placed on the rotating device, only the rollers are in contact with the pipe surface, i.e. the rollers form the sole supporting points, and the force via the supporting points in the Rotating device is entered and preferably the sum of the vertical forces across all support points corresponds to 5,000 kN to 15,000 kN.

The rollers are preferably designed in a cylindrical or disc-shaped manner. Particularly preferred are all rolls that have the same shape and size, i.e. same diameter and roll width. The rollers are preferably idler rollers and have no drive.

In one embodiment, the base frame has pockets on its upper side for receiving the roller axles. In this embodiment, the roller axles are optionally mounted in the pockets on the base frame. The rollers protrude radially beyond the base frame, so that when the pipe is placed on the turning device, only the rollers are in contact with the surface of the pipe and the rollers thereby form the support points for the pipe.

In a further embodiment, the multiple turning device has an adapter bracket per roll, which is fastened to the base frame and has a receptacle for the roll axle of a roll. The roller axle is mounted in the mount, with the mount being arranged in a mount frame. The roller protrudes radially beyond the receiving frame, so that when a pipe is placed on the rotating device, only the rollers are in contact with the surface of the pipe. In this embodiment, too, the base frame can be designed in such a way that it also has pockets for receiving the roller axles and, after the adapter brackets have been dismantled, the roller axles can be positioned directly in the base frame.

• • eine Konsolengrundplatte und
• • zwei Seitenplatten (10), die auf der Oberseite der Konsolengrundplatte (9) parallel zueinander angeordnet sind und senkrecht zur Konsolengrundplatte (9) stehen.

The adapter console preferably has

• • a console base plate and
• • two side plates (10), which are arranged parallel to one another on the upper side of the console base plate (9) and are perpendicular to the console base plate (9).

The side plates form the mounting frame in which the mounting for the roller axles is arranged.

The adapter console optionally has a height adjustment for the roller axis and the position of the roller axis can be adjusted relative to the height of the adapter console.

In one embodiment of an adapter console with height adjustment, the mount for the roller axle is formed by two opposing openings in the side plates, the openings being two opposing pockets, preferably U-shaped pockets, or two opposing oblong holes in the side plates. The height adjustment also has an axis lock for fixing the roller axis at a specified height in the adapter console. The axle lock is preferably designed as an insert, e.g. as a milled part, in the pocket, with the height of the roller axle being adjusted by the height and arrangement of the axle lock.

The rollers are preferably adjustable in height in relation to the base frame in the multiple turning device. The easiest way to adjust the height of the castors is when the castors are either inserted directly into the base frame or the castors are used in the same base frame with adapter brackets. The rotating device can be adapted to a different pipe diameter using the adapter brackets. With larger pipe diameters, the rollers are stored directly in the base frame, for example, and thus form a larger arc than if the rollers were stored in adapter brackets. The height can also be adjusted by using different adapter consoles, in which the mount for the roller axis is placed at different heights in the adapter console. All rollers are always stored in the adapter console for use in such a way that their axes of rotation lie on the arc of a circle.

The rollers and/or the adapter brackets are preferably attached to the base frame equidistantly from one another.

The base frame preferably has a base plate as a contact area that stands on the ground. In one embodiment, the base frame has at least two vertical cross members, preferably exactly two, which are connected on both sides by at least one side part, preferably a side part running perpendicularly to the cross members. The side part can be designed in several parts.

The crossbeams are preferably cut out at their upper edge in the form of a segment of a circle, i.e. cut out in accordance with the tube curvature. The base frame then has several contact surfaces for adapter brackets and the contact surfaces run in the shape of a circular arc.

The base frame and, if necessary, the adapter brackets are preferably made of steel, particularly preferably mild steel. Particularly preferably exist the base frame and the adapter consoles made of steel.

Both the base frame and the adapter consoles and roller axles can have attachment eyes for transport. Lifting eyes are also referred to as lifting points and are fixed points on loads that are intended to enable safe transport with hoists. If the adapter console is designed with side plates, a stop eye is preferably arranged in each case on an upper corner of the side plate. The stop eyes can each be attached to the inside of the side plate or alternatively the stop eyes can also be mounted on the outside of the side plate. If, in the case of two adjacent adapter brackets, the attachment eyes are each mounted in a different position on the side plate, the adapter brackets can be positioned closer together, since the protruding attachment eyes do not block one another.

The multiple rotating device according to the invention is used for rotating (rotating around the longitudinal axis) longitudinally and circumferentially welded steel pipes with large diameters, so-called large pipes, and large pipe sections with a pipe diameter of at least 6 m, preferably at least 8 to 10 m. Pipe diameters of e.g. 11.50 m or 12 m are also possible. Longitudinally welded large sections of pipe are made from sheet steel. The sheet metal blank is first bent and the open edges of the resulting slit section of pipe are stitched together with a temporary seam (basting seam), which is later removed again in the production process. The tack-welded pipe section is positioned at a welding station and first the inner seam and then the outer seam are attached to the pipe section. The tube can then be further processed, e.g. coated. With the usual construction, the tubes have a wall thickness of 35 mm to 250 mm, preferably 40 to 200 mm, particularly preferably 50 mm to 170 mm. Large pipes and large pipe sections with a diameter of 6 m to 10 m preferably have a wall thickness of 50 mm to 170 mm. A large pipe section usually has a length of 2 m to 4.2 m.

The pipes are welded together from a large number of pipe sections and have lengths of up to 120 m. In these dimensions, the pipes weigh over a thousand tons on average. With the turning device according to the invention, it is possible to turn these pipes safely and without damage, despite their weight and size, without causing dents or damage to the pipe surface.

The multiple rotating device according to the invention has sufficient load-bearing capacity for the pipes, even for the large pipe dimensions and weights. Due to the number and position of the rollers, the forces acting on the pipe surface are distributed over a relatively large part of the pipe circumference, so that the same radial force acts on each contact point of a roller with the pipe surface. This avoids excessive stresses on the pipe, particularly in the case of pipes with pipe diameters of 6 m or more, especially 8-10 m, and the structural integrity of the pipe is maintained. The bearing surface of the pipe is larger than with conventional rotary devices, which means that the pressure acting on the pipe is distributed more and there is less stress in the pipe.

In addition, the multiple turning device requires less space compared to the use of several conventional turning devices. The turning device according to the invention can also be adapted to different pipe diameters, so that it is not necessary to exchange the turning device and there is no need to keep several turning devices ready for different pipe diameters.

The subject matter of the invention is also a system having at least 2 multiple turning devices according to one of patent claims 1 to 14 and a tube with a tube diameter of at least 6 m.

Furthermore, the subject matter of the invention is a coating system having at least one multiple rotary device according to one of claims 1 to 14 and a robot for applying a coating, the robot being movable along a horizontal axis.

The subject matter of the invention is also a method for anti-corrosion coating of a longitudinally welded pipe or section of pipe with a large diameter.

1. a. Bereitstellen vom mindestens zwei erfindungsgemäßen Drehvorrichtungen,
2. b. Positionieren eines Rohrs oder Rohrschusses mit einem Durchmesser von mindestens 4,5 m, bevorzugt 6 m bis 10 m, auf den Drehvorrichtungen,
3. c. Auftragen einer Beschichtung mit einem Roboter, wobei der Roboter horizontal am Rohr entlangfährt und gleichzeitig die Beschichtung aufträgt,
4. d. Drehen des Rohrs um seine Längsachse auf den Drehvorrichtungen, wenn der Roboter die Beschichtung auf einer Linie beendet hat
5. e. Wiederholen der Schritte c. und d. und die Rohroberfläche beschichtet ist.

The procedure includes the following steps:

1. a. providing at least two rotating devices according to the invention,
2. b. Positioning a pipe or section of pipe with a diameter of at least 4.5 m, preferably 6 m to 10 m, on the rotary devices,
3. c. Application of a coating with a robot, whereby the robot moves horizontally along the pipe and at the same time applies the coating,
4. i.e. Rotating the tube around its longitudinal axis on the rotating devices when the robot has finished coating on a line
5. e. repeating steps c. and d. and the tube surface is coated.

For rotating coating, a tube is mounted on at least two rotating devices according to the invention. The rotating devices are, for example, positioned as close to the pipe ends as possible. Rotating means that the tube rests on rotating devices and one of the rotating devices causes the tube to rotate by motor. A robot applies a coating, preferably an anti-corrosion coating, horizontally on a line. The coating is thermally sprayed, for example. The robot moves along the axial central axis of the tube (i.e. in the horizontal). When the robot has finished coating on a line, the tube is rotated around the longitudinal axis on the rotary devices. The robot then starts with the next coating step and moves horizontally along the pipe again and applies the coating linearly. The pipe is turned by machine until the entire surface of the pipe or the desired area is coated.

A thermally sprayed zinc-aluminum coating, also known as TSZA (thermally sprayed ZnAI layer), is used as an anti-corrosion coating.

• 1 eine Ausführungsform einer erfindungsgemäßen Mehrfachdrehvorrichtung,
• 2 eine perspektivische Ansicht der Mehrfachdrehvorrichtung,
• 3 eine perspektivische Ansicht eines Grundrahmens,
• 4 den Grundrahmen in einer Seitenansicht,
• 5 eine Adapterkonsole in einer perspektivischen Ansicht
• 6 eine Adapterkonsole in einer Seitenansicht und
• 7 eine Adapterkonsole ohne Rolle.

The multiple turning device according to the invention is explained in more detail in exemplary embodiments with reference to the drawings. Show it:

• 1 an embodiment of a multiple turning device according to the invention,
• 2 a perspective view of the multiple turning device,
• 3 a perspective view of a base frame,
• 4 the base frame in a side view,
• 5 an adapter console in a perspective view
• 6 an adapter console in a side view and
• 7 an adapter bracket without a roll.

1 shows a side view of a multiple turning device 1 according to the invention. The multiple turning device 1 has a base frame 2 with crossbeams 13 and a base plate 12. The base plate 12 stands on the floor. At the top of the cross member 13 eight adapter brackets 6 are arranged. In each adapter bracket 6 a role 3 is rotatably mounted. A tube 40 is placed on the rotary device 1 from above. In the figure, the tube is already on the middle 6 rollers 3. The tube 40 is still partly hanging from a crane (not shown) and therefore still has a circular cross-section. Two imaginary straight lines G intersect in the center M of the tube 40 through which the longitudinal axis of the tube runs. As soon as the pipe 40 is lowered from the crane, it flattens out due to its high dead weight. The inherent deformation caused by the weight leads to the pipe being laid having a slightly more oval cross-section and also resting on the two outer rollers 3 (not shown). The rollers 3 thus form the support points of the tube on the rotating device.

2 FIG. 1 shows a perspective view of the multi-rotation device 1 according to FIG 1 . The tube 40 is transparent and only partially shown. The longitudinal axis L of the tube 40, which is at the same time the axis of rotation of the tube, runs through the center M. The base frame 2 has two crossbeams 13 which are fastened to the base plate 12 . The adapter brackets 6 overlap each of the two crossbeams 13 and as a result have a stable seat on the base frame 2, so that they can also accommodate large loads.

3 shows a perspective view of a base frame 2. The base frame 2 has two crossbeams 13 which have the same shape. The cross members 13 are perpendicular to the base plate 12 and project vertically upwards. The cross members 13 have approximately the same shape here. The cross members 13 are connected to one another laterally via two side parts 14 . The side parts 14 are formed here on both sides as two side plates 14a, 14b which are perpendicular to the crossbeams 13. The side plates 14 are also connected to the base plate 12 on their underside and stand on this.

In 4 the base frame 2 is shown in a side view. It can be seen that the upper edge of the crossbeams 13 is cut out in the shape of a circular arc, ie in the form of a segment of a circle. The crossbeams 13 have a plurality of pockets 5 along the upper edge 15 in the shape of a circular arc. The pockets 5 are semicircular in cross section. They are used to hold the roller axles 4, with one roller axle 4 being placed in the opposite pockets 5 of the two crossbeams 13a, 13b, so that the rollers are then arranged between the two crossbeams. If the rotating device 1 is used with adapter brackets 6, the upper edge 15 of the cross member serves as a contact surface for the adapter brackets. The adapter bracket 6 is placed, for example with a crane, on the cross member 13, the cross member 13 having mounting stops 16 on its upper edge 15 sen, which allow an exact positioning of the adapter bracket 6. In order to transport the base frame 2, it has several attachment eyes 17 on the larger of the two side parts, which are used to attach crane hooks, for example. In addition, the base frame 2 has a plurality of forklift shoes 18, 19, 20 in the cross member 13. In the middle there are two pairs of openings as large forklift shoes 18. Two pairs of openings as small forklift shoes 19, 20 are also arranged on the right and left of the cross member 13 on the underside outside.

5a shows an adapter bracket 6 in a perspective view. The adapter console 6 has a console base plate 21 . There are two console legs 22 on the underside of the console base plate 21 . The console legs 22 are arranged parallel to one another and perpendicular to the console base plate 21 . When placing the adapter bracket 6 on the base frame, the bracket legs 22 are each arranged on the outside of the two cross members 13 and fixed there, for example screwed. The console leg 22 therefore has two openings 23 for locking screws, which are not shown here. On the upper side of the console base plate 21 there are two side plates 24 which are arranged parallel to one another and perpendicular to the console base plate 21 . The side plates 24 are connected to one another via two connecting webs 25 . The connecting webs 25 are also connected to the console base plate 21 and stabilize the two side plates 24. There are two support struts 26 on the side of the side plate 24. A handle 27 in the form of a rod is placed between the support struts 26. The roller 3 is arranged between the side plates 24 . The roller 3 protrudes vertically over the side plates 24 and thus over the adapter bracket 6 also. A stop eye 28 is arranged at each of the upper corners of the side plate 24 . The stop eyes are each attached to the inside of the side plate. Alternatively, the stop eyes can also be mounted on the outside of the side plate.

5b shows an enlarged section 5a with the side plate 24 in the area of the mounted roller axle 4. The side plate 24 has a mount 7 for the roller axle 4. The mount 7 is designed as a U-shaped cutout from the side plate 24, with the U running from the upper edge of the side plate 24 to its center runs. The roller axis 4 is mounted at the lowest point of the recording 7. As a result, the roller axis is positioned at the lowest possible height in the adapter console. The roller axle 4 is secured at the top with an axle lock 29, which is designed as a milled part and closes the remaining opening. The reel is designed so that the reel rotates and the shaft is rigid and does not rotate.

6 shows the adapter bracket 6 in a semi-transparent side view with a roller 3 arranged at a different height. The side plate 24 has an axle mount 7 in the form of a U-shaped cutout. In the lower area of the axle mount in the direction of the console base plate 21, an insert plate 30 is introduced, which closes the lower part of the U-shaped opening and has a segment of a circle on its upper side. The roller axle 4 rests on the insert plate 30 in this segment of a circle. The insert plate 30 is fixed in its position in the opening by means of lateral securing plates 31 . The roller axle 4 is secured upwards in the mount 7 by the axle lock 29 .

7a shows an adapter bracket 6 without a role in a perspective view. The adapter console 6 has a console base plate 21 on the underside of which there are two parallel console legs 22 . On the upper side of the console base plate 21, two side plates 24 arranged parallel to one another are fastened. The side plates 24 are connected to one another via the two connecting webs 25 . In each side plate there is a pocket 5 which can accommodate the roller axle. A stop eye 28 is arranged at the upper corners of the side plate 24 on the inside of the side plate.

7b shows the adapter console 7a in a side view. The pocket 5 in the side panel 24 is designed as a U-shaped pocket in the side panel. The console leg 22 has two openings 23 for receiving the locking screws.

The invention is not limited to one of the embodiments described above, but can be modified in many ways.

All of the features and advantages resulting from the claims, the description and the drawing, including structural details, spatial arrangements and method steps, can be essential to the invention both on their own and in a wide variety of combinations.

Reference List

1

multiple turning device

2

base frame

3

role

4

roller axis

5

Bag

6

adapter console

7

Recording

8th

recording frame

9

console base plate

10

side plate

11

openings

12

base plate

13

cross member

14

side part

15

upper edge of the cross member

16

assembly stop

17

Stop eye base frame

18

forklift shoes

19, 20

forklift shoes

21

console base plate

22

console legs

23

opening

24

side plate

25

connecting bar

26

support strut

27

grab handle

28

Stop eye adapter

29

axle lock

30

insert plate

31

locking plate

40

Pipe

M

center of pipe cross-section

L

longitudinal axis

D

axis of rotation

K

circular arc

G

Straight

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 1777106 A1 [0004]
• DE 2520686 A [0005]

Claims (17)

Multiple turning device (1) for turning large-diameter pipes about their longitudinal axis (L), having - a base frame (2), - a plurality of rollers (3) which are lined up next to one another on the base frame (2), each roller (3) having a roller axis (4) and an axis of rotation (D) running through the roller axis and the axes of rotation (D) of the rollers (3) run parallel to one another and parallel to the longitudinal axis (L) of a tube (40) mounted on the rotary device, characterized in that - the multiple rotating device (1) has 6 to 10 rollers (3), preferably 8 rollers, - the axes of rotation (D) of the rollers (3) are arranged on a circular arc (K), the circular arc having an angle of at most 135°, preferably 120°, preferably less than or equal to 90° and - the rollers (3) form the support points for a pipe (40), so that when a pipe (40) is placed on the rotating device (1), only the rollers (3) on the surface of the pipe and the force is entered into the rotating device via the support points and preferably the sum of the vertical forces across all support points corresponds to 5,000 kN to 15,000 kN. Multiple rotation device (1) according to Claim 1 , characterized in that the rollers (3) are designed cylindrically or disc-shaped, preferably the rollers (3) all have the same shape and are the same size. Multiple rotation device (1) according to Claim 1 or 2 , characterized in that the base frame (2) has pockets (5) on its upper side for receiving the roller axles (4) of the rollers and preferably the roller axles (4) are mounted on the base frame (2) in the pockets (5), the The rollers protrude radially beyond the base frame (2) so that when the pipe is placed on the rotating device, only the rollers (3) are in contact with the surface of the pipe. Multiple turning device (1) according to one of the preceding patent claims, characterized in that the multiple turning device has an adapter bracket (6) per roll (3) which is fastened to the base frame (2) and a receptacle (7) for the roll axis (4) of a roll (3) and the roller axis (4) is mounted in the receptacle (7), the receptacle (7) being arranged in a receptacle frame (8) and the roller (3) protruding radially beyond the receptacle frame (8), so that when a tube (40) is placed on the rotating device (1), only the rollers (3) rest on the tube surface. Multiple turning device according to patent claim 4 , characterized in that the adapter console (6) has • a console base plate (9), • two side plates (10) which are arranged parallel to one another on the upper side of the console base plate (9) and are perpendicular to the console base plate (9), • the Side plates (10) form the receiving frame (8). Multiple rotation device (1) according to patent claim 4 or 5 , characterized in that the adapter bracket (6) has a height adjustment for the roller axle (4) and the position of the roller axle (4) relative to the height of the adapter bracket (6) can be adjusted. Multiple rotation device (1) according to claim 6 , characterized in that the receptacle (7) for the roller axle (4) are two opposite openings in the side plates (10), the openings (11) two opposite elongated holes or two opposite U-shaped pockets in the side plates ( 10) and the height adjustment has an axle lock (12) for fixing the roller axle at a predetermined height. Multiple rotation device (1) according to Claim 7 , characterized in that the axle lock (12) is designed as an insert, for example as a milled part, in the slot or the U-shaped pocket. Multiple rotation device (1) according to one of the preceding patent claims, characterized in that the rollers (3) are idler rollers and have no drive. Multiple turning device (1) according to one of the preceding patent claims, characterized in that the base frame (2) has a base plate (12) as a contact surface which stands on the ground. Multiple turning device (1) according to one of the preceding patent claims, characterized in that the base frame (2) has at least two vertical crossbeams (13) which are connected on both sides by at least one side part (14), preferably a side part (14) running perpendicularly to the crossbeams (13). Side part (14) are connected. Multiple rotation device (1) according to Claim 11 , characterized in that the cross members (13) are cut out at their upper edge in the form of a circular segment. Multiple turning device (1) according to one of the preceding patent claims, characterized in that the rollers (3) and/or the adapter brackets (6) are fastened equidistantly to one another on the base frame. Multiple turning device (1) according to one of the preceding patent claims, characterized in that the base frame (2) and optionally the adapter brackets are made of steel, preferably mild steel, preferably the base frame and the adapter brackets. System comprising at least 2 multiple turning devices according to one of patent claims 1 until 14 and a pipe with a pipe diameter of at least 6 m. Coating system comprising at least one multiple turning device according to one of patent claims 1 until 14 and a robot for applying a coating, the robot being movable along a horizontal axis. Method for anti-corrosion coating of a longitudinally and circumferentially welded pipe or section of pipe comprising the steps: f. providing at least two rotary devices according to one of patent claims 1 until 14 , g. positioning a tube or section of tube with a diameter of at least 4.5 m, preferably 6 m to 10 m, on the rotary devices, h. Application of a coating with a robot, the robot moving horizontally along the pipe and simultaneously applying the coating, i. rotating the tube about its longitudinal axis on the rotating devices when the robot has finished coating on a line and j. repeating steps c. and d. and the pipe surface is coated.

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