JPH0569893A - Method for mounting heating pipe in load oil tank - Google Patents

Abstract

PURPOSE:To provide a method for mounting a heating pipe in a load oil tank wherein connection of the heating pipe by butt welding is facilitated to substantially reduce mounting labor. CONSTITUTION:A method for mounting a heating pipe in a load oil tack is characterized by performing unit work for butt welding of the heating pipe 1 of its linear pipe part 2 and U-shaped curved pipe part 3 and for integrally forming the heating pipe 1 with an erection supporting material 4 on a land surface plate to weld a worked unit onto a bottom plate in the load oil tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a heating pipe for heating cargo oil, which is fixedly installed in the cargo tank of an oil tanker vessel, and more specifically, to a heating pipe and a support for installing the heating pipe. The present invention relates to a method in which a material is unitized and welded and fixed on the bottom plate in the cargo oil tank.

[0002]

2. Description of the Related Art Conventionally, a heating pipe 54 of this type has been mounted by welding a steel pad 51 on an inner bottom plate and standing upright on the steel pad 51 to form an inverted L-shaped chevron-shaped heating pipe. The erection supporting member 52 is welded, and the horizontal side 53 of the inverted L-shaped angle steel is formed.
A straight pipe portion and a U-shaped bent pipe of the heating pipe 54 are arranged on the upper side, and the straight pipe and the U-shaped bent pipe are connected to each other by welding. There is known a method in which the heating pipe erection support member 52 is screwed with the U bolt 55 and the nut 56.

[0003]

SUMMARY OF THE INVENTION According to the prior art, a heating pipe erection supporting member made of an angle-shaped steel having an inverted L shape is used.
Weld upright on the steel pad on the bottom plate of the cargo oil tank, and then arrange the straight pipe and the U-shaped curved pipe on the side forming the parallel part with the inner bottom plate of the heating pipe erection support. Must be connected by welding, and the heating pipe must be screwed with U bolts and nuts. The butt welding of these straight pipes and curved pipes on the bottom plate in the oil tank is performed by the bottom surface of the heating pipe. Has a problem that sufficient welding cannot be performed and a highly accurate radius of curvature of the curved pipe is required.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to sufficiently perform butt welding of heating tubes and to reduce the curvature of U-shaped bent tubes. An object of the present invention is to provide a method for mounting a heating pipe in a cargo tank that does not require much radius accuracy.

[0005]

In order to achieve the above object, the method of mounting the heating pipe in the oil tank according to the present invention is a pedestal on two opposite sides of a heating pipe erection support member having a U-shape. A disk-shaped steel pad is welded to the end, and a heating pipe is arranged on one side that forms a parallel part with the inner bottom plate sandwiched between the two sides of the pedestal part, and the heating pipe is connected with U bolts and nuts. There is a mounting method in which the heating pipe erection support is screwed into a unit, the unitized product is placed on the bottom plate of the oil tank and the steel pad at the end of the pedestal is welded to the inner bottom plate. .

[0006]

The butt welding of the straight pipe and the U-shaped curved pipe of the heating pipe can be carried out on a surface plate on land, and when welding the lower surface of the heating pipe, the lower surface becomes the upper surface. It can be performed by rotating the heating tube.

On a land surface plate, the heating pipe erection support member unitized by screwing the heating pipe to the heating pipe erection support member with U bolts and nuts makes it easy to dispose and mount on the bottom plate in the oil tank. To

[0008]

EXAMPLES Examples will be described with reference to FIGS.

In the heating pipe 1 made of steel pipe, the straight pipe portion 2 and the U-shaped curved pipe portion 3 are connected by welding, for example, on a surface plate on land.

The heating pipe 1 connected by the welding is made of chevron steel, and a cargo tank for a U-shaped heating pipe erection support 4 in which circular steel pads 5 are welded to the ends of two opposite pedestals. The heating pipe 1 is arranged on a side that is parallel to the inner bottom plate, and the heating pipe 1 is provided with a heating pipe installation support member 4
Then, it is screwed with the U bolt 6 and the nut 7.

The heating pipe 1 is screwed to the heating pipe erection support member 4 with U bolts 6 and nuts 7 to form a unit, which is arranged on the bottom plate 8 in the oil tank and the steel circular pad 5 is placed in the oil tank. It is welded to the bottom plate 8.

[0012]

Since the present invention is configured as described above, it has the following effects. Welding connection between the straight pipe part of the heating pipe and the U-shaped curved pipe part, welding of the steel pad to the pedestal end of the heating pipe installation support material and screwing of the heating pipe to the heating pipe installation support material on land. Since the welding can be performed, the welding to the bottom plate in the oil tank increases the reliability of the welding connection of the heating pipes as compared with the conventional method of attaching the heating pipes, and also significantly reduces the labor.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an embodiment of the present invention.

FIG. 2 is a schematic view showing an X-Y section of FIG.

FIG. 3 schematically shows a cross section of a conventional heating tube mounting method.

[Explanation of symbols]

 1 heating pipe 2 straight pipe part 3 U-shaped curved pipe part 4 heating pipe erection support material 5 steel circular pad 6 U bolt 7 nut 8 bottom plate in cargo tank

Claims (1)

[Claims] 1. A method of mounting a heating pipe installed in a cargo tank of an oil tanker ship, wherein disk-shaped steel is provided at two pedestal ends facing each other of a U-shaped heating pipe erection support member facing each other. Weld the pad made of
A heating tube is arranged on one side forming a parallel portion with an inner bottom plate sandwiched between two sides of the pedestal portion, and the heating tube is united by screwing it to a heating tube erection supporting material with U bolts and nuts. , The unitized erection support with heating pipe is arranged on the bottom plate of the cargo oil tank, and the heating pipe erection support of the heating pipe is welded to the inner bottom plate by a disc-shaped steel pad at the pedestal end. How to install.