JP2005220969A - Prime arrangement fillet cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prime arrangement fillet cap easy to manage a push-in amount, making influence of skill of a worker on attachment error very little. <P>SOLUTION: In the prime arrangement fillet cap used in a prime arrangement fillet cap construction method for welding and fixing the prime arrangement fillet cap on a cut end part of a gas conduit under a gas shut off condition, the prime arrangement fillet cap is provided with a fillet cap main body 3 including a tubular tip part fitted on an end part outer circumference surface of the gas conduit (main pipe 1) with a predetermined gap, a seal retaining member 12 fixed on the fillet cap main body 3 at a position separate inward from an opening end part of the fillet cap main body 3 and projecting toward the opening end part side of the fillet cap main body 3, an annular groove 6 formed by the fillet cap main body 3 and the seal retaining member 12 in the fillet cap main body 3, and a heat resistant annular seal member 13 fitted in the annular groove 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an original fillet cap used in the original fillet cap method for closing a cut end portion of a gas pipe piped under a road or the like, in particular, a portion of the steel pipe that has become unnecessary. About.

  In gas pipelines (mains, etc.) buried under roads, some mains have to be replaced for reasons such as aging. At that time, in the case of a main pipe of a steel pipe, an original arrangement work is generally performed in which an unnecessary portion is cut and the cut end portion is closed.

  A fillet cap method has been generally employed as the original rearranging work for the steel pipe main. This fillet cap method, as disclosed in Japanese Patent Laid-Open No. 8-14471, is a gas shut-off process for preventing gas from flowing out from a main pipe from which unnecessary portions have been cut, and a fillet cap for original arrangement This is a fillet cap method for organizing as follows, which includes a cap welding process in which the pipe is welded and fixed to the outer periphery of the cut end portion of the main pipe and a post-processing process.

  In the original arrangement fillet cap method in which the fillet cap is welded and fixed to the cut end of the gas conduit piped under the road in a gas-blocked state and the cut end of the gas conduit is closed, the inside of the pipe is blocked by temporary closing means. A fillet cap is fitted on the outer periphery of the cut end of the gas conduit by sandwiching a heat-resistant sealing member between the cut end surface of the gas conduit in the temporarily shut off state of the gas conduit, and the fillet cap is pressed by the pressing means. The fillet cap is connected to the gas conduit in a state in which the heat-resistant seal member is pressed against the cut end face and held in a compressed and deformed seal state, and the temporarily closed state in the tube by the temporary closing means is released and the air in the tube is discharged. Original fillet cap method for welding and fixing to the outer periphery of the cut end of the steel.

  By such an original fillet cap method, the working time can be further shortened and the working apparatus can be made inexpensive by eliminating the need for a nitrogen gas injection device.

  More specifically, the point part of the improved fillet cap method for original arrangement described above will be briefly explained. As shown in FIG. 7, the steel pipe main pipe (gas conduit) 1 and a thick member having the same outer diameter are used. The stepped annular thick heat resistant seal member 37 is used, and the stepped annular heat resistant seal member 37 that is elastically deformed by pressing the fillet cap 35 for original arrangement against the main pipe 1 is sandwiched. The fillet welded portion 15 is attached to the inner peripheral surface of the cylindrical tip portion 4 of the original organizing fillet cap 35 and the outer peripheral surface side of the steel pipe main tube 1 in a state where gas is prevented from leaking. This is a method of performing welding work safely.

Japanese Patent Laid-Open No. 7-14471

  However, as in the improved conventional method shown in FIG. 8, the stepped annular thick-walled heat resistance at the inner inclined surface 36 in the original organizing fillet cap 35 having the inner inclined surface 36 having a frustoconical shape or the like. In a seal structure in which the outer peripheral edge of the seal member 37 is crushed and deformed, the fitting state between the main pipe 1 and the original organizing fillet cap 35 is the uniformity and deformation of the elastic deformation of the thick heat-resistant seal member 37. It depends on the amount. Therefore, it is necessary to press the original organizing fillet cap 35 evenly and with an appropriate pressing amount. However, the inner shape of the original organizing fillet cap 35 has a manufacturing error, so it is slightly different from each other, and the operator adjusts the amount of indentation. Therefore, the indentation as shown in FIG. When the amount becomes L1 or the pushing amount L2 as shown in FIG. 8B, there is a problem that the pushing amount L varies and uniform management is difficult.

  Further, in connection with the above problem, as shown in FIG. 8C, the original arrangement is made so that the fillet cap axis (cap central axis) C and the main pipe axis (main central axis) C1 coincide. Since it is difficult to press the fillet cap 35 completely evenly, a deviation angle A is generated, and the fillet cap axis (cap central axis) C and the main pipe axis (main pipe central axis) C1 are almost equal. There are many parts that depend on the skill of the operator who installs the original organizing fillet cap 35, such as requiring a high degree of skill to match. For this reason, there has been a demand for an original organizing fillet cap that is easy to mount the original organizing fillet cap and does not require a high degree of skill.

  Therefore, in the present invention, it is easy to attach the fillet cap for original arrangement, and even if the original fillet cap is pushed in strongly, it will not be pushed too much, the push amount can be easily managed, and the skill of the operator is reduced. An object of the present invention is to provide a fillet cap for organizing that has an extremely small influence on mounting errors and that can be safely and securely closed.

In the original organizing fillet cap according to the first aspect of the present invention, the original organizing fillet cap is constructed by welding and fixing the original organizing fillet cap to the cut end portion of the gas conduit in a gas-blocked state to close the cut end portion of the gas conduit. A fillet cap for original arrangement used in a cap construction method, wherein the fillet cap for original arrangement has a cylindrical tip portion fitted with a predetermined gap to an outer peripheral surface of an end portion of the gas conduit. And a seal member that is fixed to the fillet cap body at a position inward from the opening end of the fillet cap body, projects toward the opening end of the fillet cap body, and has a smaller diameter than the gas conduit An annular groove formed by a seal holding member having a holding portion and a fillet cap main body and a seal holding member having a seal member holding portion in the fillet cap main body. , Characterized in that it comprises a heat-resistant annular sealing member which is inlaid in the annular groove.
According to a second invention, in the fillet cap for organizing of the first invention, the heat-resistant annular sealing member is made of silicone rubber.
According to a third invention, in the fillet cap for organizing of the first invention or the second invention, the heat-resistant annular seal member and the heat-resistant seal holding member are fixed with an adhesive.
According to a fourth aspect of the invention, in the fillet cap for organizing according to any one of the first to third aspects of the invention, the heat-resistant annular seal member is an annular plate.
In the fifth aspect of the invention, the original organizing fillet cap according to any one of the first to fourth aspects of the invention, the seal holding member has a disc-like main body, and the outer edge of the disc-like main body is a corner. It is fixed to the inner peripheral surface of the meat cap body by welding.

According to the first invention, by using the fillet cap for rearranging, in which the heat resistant annular seal member is fitted in the annular groove formed by the fillet cap body and the seal holding member having the seal member holding portion, A simple heat-resistant annular seal member can reliably close the end of the steel pipe body and the original fillet cap, and the original fillet cap can be easily attached to the cut steel pipe end. it can.
In particular, according to the present invention, by providing a heat-resistant seal retaining member to the fillet cap for original arrangement, it is possible to easily manage the amount of pushing of the fillet cap for original arrangement, and to prevent deviation from the main pipe axis. In addition, since the amount of push-in of the original fillet cap is limited by the heat-resistant seal holding member, even if the fill-up cap is pushed too hard, it will not be pushed in too much. Easy to manage quantity. Also, the fillet cap for rearranging is restricted by the heat-resistant seal holding member without being pressed strictly evenly, so it is finally fitted along the tube axis of the main pipe (gas conduit). The Therefore, it is easy to attach the fillet cap for original arrangement, and it is possible to extremely reduce the influence of the installation skill of the operator on the installation error.
According to the second invention, the heat-resistant annular seal member is a simple heat-resistant annular seal member with a simple shape, low processing cost and a small amount of use, even if expensive and highly heat-resistant silicone rubber is used. Therefore, a relatively inexpensive heat-resistant annular seal member can be obtained.
According to the third invention, the heat-resistant annular seal member and the seal holding member are fixed with an adhesive such as a silicone-based sealing material, so that the heat-resistant annular seal member is sealed between the heat-resistant annular seal member and the seal holding member. In addition to the airtightness due to, the airtightness can be further ensured.
Further, according to the fourth invention, since the heat-resistant annular seal member is an annular plate, it can be an inexpensive heat-resistant annular seal member with an extremely simple shape, and is relatively inexpensive even if silicone rubber is used. A heat resistant annular sealing member.
Further, according to the fifth invention, since the main body of the seal holding member is a disc-shaped main body, the structure of the seal holding member can be a simple shape of the seal holding member. It can be a meat cap.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to FIG. 1 and FIG. 2, the structure of the original organizing fillet cap 11 according to an embodiment of the present invention will be described. The fillet cap body 3 includes a gas conduit 1 (hereinafter also referred to as a steel pipe main pipe 1). A cylindrical tip portion 4 fitted to the outer peripheral surface of the end portion with a predetermined gap, and a substantially hemispherical portion 5 provided integrally with the cylindrical tip portion 4 on the proximal end side. A purge female screw hole 16 is provided at the top of the hemispherical portion 5. A plug 14 is detachably screwed into the purge female screw hole 16. 1A shows a final state in which the plug 14 is rubbed against the fillet cap body 3 by welding 10, and FIG. 1B and FIG. Only shows the state.

  Further, the outer peripheral edge portion of the annular plate body 7 in the heat-resistant seal holding member 12 is welded to the fillet cap body 3 at a position away from the opening end on the steel pipe main pipe side in the fillet cap body 3 in the axial direction. It is fixed to the inner peripheral surface. Note that the outer peripheral edge of the annular plate body 7 may be fixed to the inner peripheral surface of the fillet cap body 3 with an adhesive, and when welding, it may be fixed by continuous or spaced welding.

  The heat-resistant seal holding member 12 projects toward the opening end of the fillet cap body 3 and has a cylindrical seal member holding portion 12a having an outer diameter slightly smaller than the inner diameter of the steel pipe main pipe 1. Is fixed to the annular plate body 7 by welding or the like and provided integrally therewith, and an air vent hole 12b is provided in the center of the annular plate body 7. And in the fillet cap 11 for original arrangement of this invention, the seal holding member which has the inner peripheral surface of the cylindrical front-end | tip part 4 of the fillet cap main body 3, and the seal member holding part 12a in the said fillet cap main body 3 The heat-resistant annular seal member 13 made of an annular plate is fitted into the annular groove 6 formed by

  In order to ensure the airtight state of the adhesive surface between the annular groove 6 and the heat-resistant annular seal member 13, a silicone rubber caulking material or other sealing material is interposed as an airtight adhesive, It is preferable to have a structure that reliably seals the bonding surface between the groove 6 and the heat-resistant annular seal member 13 and reliably prevents gas leakage to the outer surface side of the steel pipe main pipe 1.

  As described above, the inner diameter of the heat resistant seal member 13 constituted by the annular plate is slightly smaller than the inner diameter of the steel pipe main pipe 1, and the outer diameter of the heat resistant seal member 13 is smaller than the outer diameter of the steel pipe main pipe 1. Is made slightly larger to have the same size as the inner diameter of the cylindrical tip portion 4 of the original organizing fillet cap 11, and to be in contact with the entire cut end surface of the steel pipe main pipe 1. In this case, it is a simpler shape than the original organizing fillet cap 35, and it is an inexpensive part in which the amount of expensive silicone rubber used is significantly reduced.

  Next, an embodiment of a fillet cap method for original arrangement using the fillet cap 11 for original arrangement according to the present invention will be described.

  In carrying out the original organizing fillet cap method using the original organizing fillet cap 11 of the present invention, the steel pipe main pipe 1 under the road where the unnecessary part is generated is excavated by excavating the surrounding earth and sand. As shown in FIG. 3, a diffusion tube 20 is connected to the upper surface of the main tube 1. Then, the main ball 8a and the reverse ball 8b are inserted into the main tube 1 through the diffusion tube 20, compressed air is supplied to the main ball 8a and the reverse ball 8b through the tubes 8c and 8d, and these are expanded to expand the inside of the tube. The steel pipe main pipe 1 is temporarily closed by being brought into pressure contact with the surface.

  Subsequently, the unnecessary portion of the steel pipe main pipe 1 is cut. Prior to this, the anticorrosion layer on the outer periphery of the steel pipe main pipe 1 is peeled over a predetermined width including the cut portion and cleaned cleanly. At that time, the outer periphery of the steel pipe main pipe 1 from which the anticorrosion layer has been peeled is finished with a grinder or the like so as not to leave scratches or irregularities, and cleaned cleanly.

  The steel pipe main pipe 1 is cut so that the cut end face 1d forms a right-angled face, and is deburred and polished. Thereafter, chips and deposits on the inner peripheral surface 1b of the main pipe 1 are cleaned at least over a predetermined range from the cut end surface 1d.

  After such pre-preparation, as shown in FIG. 4, the bracket 29 that pivotally supports the horizontal shaft 26 across a pair of bracket main bodies facing each other in the circumferential direction at a distance from the cut end surface 1 d is arranged in the circumferential direction. Are arranged on the outer periphery of the steel pipe main pipe 1, and the connecting flanges 9 of the half-divided body 17 with the flange in the split-type fixed band 31 are fastened by fastening bolts 25, and attached. One end side of the connecting member 34 is connected to each bracket 29.

  A rubber or the like is fixed to the semicircular arc inner peripheral surface of each of the flanged half-divided bodies 17 so as to be securely attached while protecting the gas conduit. In addition, the one end side of the connecting member 34 may be a hook when it is detachably locked to the horizontal shaft 26. When the horizontal shaft 26 is detachable with a bolt or the like, one end portion of the connecting member 34 may be an annular portion.

  Subsequently, the fillet cap 11 for original arrangement is fitted to the steel pipe main pipe 1 so that the annular heat-resistant seal member 13 is brought into contact with the cut end surface 1d of the main pipe 1.

  When the original arrangement fillet cap 11 is fitted to the outer peripheral surface 1c of the cut end portion of the steel pipe main pipe 1, the original arrangement fillet cap 11 is inserted into the steel pipe main pipe 1 via a spacer (not shown). Thus, a predetermined gap is formed over the entire circumference between the original organizing fillet cap 11 and the outer peripheral surface 1 c of the steel pipe main pipe 1.

  Next, the plug 14 is removed from the purge female screw hole 16, and the male threaded connection pipe 28, which is disposed at the center of the fillet cap fixing jig 32 and has an external thread on the outside, is screwed into the purge female screw hole 16 in an airtight manner.

  The fillet cap fixing jig 32 of this embodiment includes the connecting pipe 28 with the male threaded portion, the receiving member 27 fixed to the intermediate portion in the axial direction thereof, and a plurality of turns in which the base end side is fixed to the receiving member 27. The moving and supporting arm 19 is integrated, and a clamping jig 33 to be described later is attached thereto. The rotating and supporting arm 19 is opposed to the bracket 29. A groove or hole 38 is provided through which the connecting member 34 is inserted.

  The pivot support arm 19 is provided at equiangular intervals in the circumferential direction similarly to the bracket 29, and the pivot support arm 19 is rotated to connect the male threaded connecting tube 28. Screw into the purge female screw hole 16 in an airtight manner.

  In addition, after fitting the original organizing fillet cap 11, the split-type fixing band 31 may be attached to the steel pipe main pipe 1. Further, the steel pipe main pipe 1 may be fitted with the original organizing fillet cap 11 up to the turning and supporting arm 19 attached.

  Further, the fillet cap fixing jig 32 is connected to the male threaded connecting pipe 28, the receiving member 27 screwed into the male threaded connecting pipe 28, and the turning and supporting arm 19 fixed to the receiving member 27. You may comprise so that separation is possible. In addition, the fillet cap main body 3 may be directly pressed by the receiving member 27 after the receiving member 27 and the male threaded connecting pipe 28 are separated. In this case, the fillet cap fixing jig 32 is rotated and supported. The arm 19 and the receiving member 27 are provided. The receiving member 27 may be a steel female screw member, which may be screwed into the connecting pipe 28 with a male screw portion or may be fixed by welding.

  Next, when the other end side of each connecting member 34 is, for example, the male screw shaft portion 39, the male screw shaft portion 39 is passed through the lateral groove or the horizontal hole 38 of the rotation support arm 19, and the respective connecting members 34. The male screw shaft portion 39 on the other end side is screwed by turning the jig 33 into the female screw hole of the tightening jig 33 formed of the female jig rotation jig having the rotation handle 18, and the original organizing fillet cap 11 is inserted. Can be pressed against the cut end face of the steel pipe main pipe 1. The connecting member 34 is configured by connecting and arranging in series a plurality of members including a ring-shaped strip having a ring portion at both ends of a rope or the like or a link chain and a screw shaft portion 39 with a hook. The connecting member 34 is very good.

  In this way, each fastening jig 33 is rotated and the connecting member 34 is pulled while the fastening jig 33 is supported by the turning and supporting arm 19 in the fillet cap fixing jig 32. Then, the fillet cap 11 for original arrangement is pressed, and the cut end face 1d of the main pipe 1 and the fillet cap 11 for original arrangement are closed by the heat resistant seal member 13.

  As described above, in this embodiment, the fillet cap fixing jig 32 is connected to the original organizing via the male threaded connecting pipe 28 that is airtightly screwed into the purge female screw hole 16 in the original organizing fillet cap 11. The meat cap 11 is configured to be pressed against the steel pipe main pipe 1.

  Thereafter, when each of the fastening jigs 33 is rotated and the connecting member 34 is pulled, the original organizing fillet cap 11 is pressed via the receiving member 27 and the connecting pipe 28 with the male screw. The mounted heat-resistant seal member 13 is pressed against the cut end face of the steel pipe main pipe 1 with compressive deformation, and the gap between the cut end face 1d of the main pipe 1 and the original organizing fillet cap 11 is maintained in a sealed state. (See FIG. 4).

  Subsequently, by connecting the bypass hose 12 to the male threaded connecting pipe 28, the main pipe 1 communicates with the activated carbon adsorption device 23 installed on the ground (see FIG. 4). Then, while gradually opening the valve 24 of the activated carbon adsorption device 23 and performing air purge in the steel pipe main pipe 1, the diffusion pipe 2 is removed from the steel pipe main pipe 1, the air is drawn from the main ball 21 a and the reverse ball 21 b, and these are shrunk. It is made to remove from the communicating hole 40 of the steel pipe main pipe 1, and the communicating hole 40 is obstruct | occluded by screwing and fixing the plug 41 to the communicating hole 40 (refer FIG. 5).

  Next, whether or not the air purge has been completed is confirmed by an ignition test using a combustible gas detector. When ignition is confirmed, the air in the steel pipe main pipe 1 is discharged and converted into city gas. The valve 24 is closed as the air purge has been completed.

  When the air purge is completed, an airtight test is performed to determine whether or not the sealing state between the cut end surface 1d of the steel pipe main pipe 1 through the heat-resistant sealing member 13 and the fillet cap 11 for original arrangement is complete. This airtight test is performed, for example, by applying a foaming liquid to the opening of the fillet cap 11 for original arrangement. If leakage is recognized, the tightening jigs 33 are screwed evenly and sequentially again, the fillet cap fixing jig 32 is pressed against the fillet cap 11 for rearranging, and the heat-resistant sealing member 13 is removed. The sealing state between the cut end face 1d of the steel pipe main pipe 1 and the original organizing fillet cap 11 is made perfect.

  Here, if the result of the airtight test is good, the opening 24 of the fillet cap 11 for original arrangement is clamp-welded 15a to the outer peripheral surface 1c of the main pipe 1 with the valve 24 opened. This clamp welding 15a is preferably performed at 4 to 8 locations at 50 mm or more at one location.

  Thereafter, the fastening jig 33 is rotated so as to release the tension of the connecting member 34, the connecting member 34 and the fastening jig 33 are detached, and the split-type fixing band 31 is separated into the half-divided bodies 17 and 17. Remove from main pipe 1. In this state, the fillet weld 15 is continuously welded to the outer peripheral surface 1c of the main pipe 1 (see FIG. 6). Even during the continuous fillet welding 15, the valve 24 is opened.

  When the valve 24 of the activated carbon adsorption device 13 is open during the welding operation of the original organizing fillet cap 11 or immediately after the welding operation is completed, the mist purge in the steel pipe main pipe 1 is performed. Then, the valve 24 is closed after the welding work of the original organizing fillet cap 11. When the mist purge in the steel pipe main pipe 1 is performed after the welding operation with the valve 24 of the activated carbon adsorption apparatus 13 closed, the valve 24 of the activated carbon adsorption apparatus 13 is opened and the mist purge in the steel pipe main pipe 1 is performed. When the mist purge is completed as a result of the visual confirmation, the valve 24 is closed. As described above, the mist purge may be performed during or after welding.

  Subsequently, the fillet cap fixing jig 32 having the male threaded connecting pipe 28 and the bypass hose 22 are removed from the original organizing fillet cap 11, and the plug 14 is screwed and held in a sealed state instead. The plug 14 is fixed to the original organizing fillet cap 11 by welding.

  With the above, the welding work of the original organizing fillet cap 11 to the main pipe 1 is completed, and as a subsequent work, coating is applied to the cut end portion of the steel pipe main pipe 1 and the original organizing fillet cap 11 part, The steel pipe main pipe 1 to which the original organizing fillet cap 11 is fixed by welding is backfilled.

  In the original arrangement fillet cap method using the original arrangement fillet cap 11 of the present invention, the air in the steel pipe main pipe 1 is discharged, and the outflow of the city gas in the steel pipe main pipe 1 is a heat resistant sealing member 13. Since the fillet cap 11 for original arrangement is welded in a sufficiently sealed state, there is no risk of igniting the city gas in the steel pipe main pipe 1 during the welding. In addition, due to the simplification of the work procedure, the work time is shortened as compared with the prior art.

  As a means for pressing the original organizing fillet cap 11, although not shown, the connecting member 34 is a connecting member having a turnbuckle, and the fastening jig 33 is a female screw member (locking member) such as a nut. ) And rotating the turnbuckle to press the fillet cap 11 for original arrangement via the fillet cap fixing jig 32.

  As other means for pressing the original organizing fillet cap 11, the illustration is omitted as in the above, but pressing through a jack fixed to the center of the sheet pile installed in the excavation groove of the main pipe 1. The original organizing fillet cap 11 may be pressed by a member. In this case, the split-type fixing band 31, the connecting member 34, and the fillet cap fixing jig 32 are not required.

  Note that, depending on the diameter of the cylindrical tip of the original organizing fillet cap 11, for example, the steel pipe main pipe 1 having a nominal diameter of 300A or the steel pipe main pipe 1 having a nominal diameter of 100A to 750A can be applied. .

  As the heat-resistant sealing member 13 used for the original organizing fillet cap 11 in the present invention, for example, it is excellent in heat resistance of about 180 ° C. (maximum heat of 280 ° C.) and good in aging resistance. An annular plate made of flexible silicone rubber may be used.

(A) is a partially longitudinal side view showing a state in which a fillet cap for organizing according to an embodiment of the present invention is used, a plug is screwed and fixed by welding, and a main pipe end of a steel pipe is closed. ) Is a partially longitudinal side view showing a fillet cap for original arrangement. It is the perspective view which looked at the fillet cap for original organization of this invention from the inner side. It is construction procedure explanatory drawing of a steel pipe main pipe. It is construction procedure explanatory drawing. It is construction procedure explanatory drawing. It is construction procedure explanatory drawing. It is a partially longitudinal side view which shows the state which obstruct | occluded the main pipe end part of the steel pipe with the conventional fillet cap for original arrangement | positioning. It is explanatory drawing in the case of obstruct | occluding the main pipe end part of the steel pipe with the conventional fillet cap for original arrangement | positioning.

Explanation of symbols

1 Main pipe 1a Communication hole 1b Inner peripheral surface 1c Outer peripheral surface 1d Cut end surface 2 Gas 3 Fillet cap main body 4 Cylindrical tip 5 Semi-spherical part 6 Annular groove 7 Annular plate main body 8a Main ball 8b Reverse ball 8c Tube 8d Tube 9 Connecting flange 10 Welding 11 Original organizing fillet cap 12 Heat resistant seal holding member 13 Heat resistant sealing member 14 Plug 15 Fillet weld 16 Purge female screw hole 17 Half-divided body 18 Rotating handle 19 Rotating arm 20 Radiating tube 21 Temporary closing means 22 Bypass hose 23 Activated carbon adsorption device 24 Valve 25 Bolt 26 Horizontal shaft 27 Receiving member 28 Male threaded connecting pipe 29 Bracket 31 Split type fixing band 32 Fillet cap fixing jig 33 Tightening jig 34 Connecting member 35 Original arrangement Fillet cap 36 Inner inclined surface 37 Stepped annular thick heat-resistant seal member 38 Horizontal groove or side 39 externally threaded shaft portion 40 hole 41 plug 42 open end

Claims (5)

  In the original organizing fillet cap used in the original organizing fillet cap method, in which the cutout end portion of the gas conduit is closed by welding and fixing the original organizing fillet cap to the cut end portion of the gas conduit, The fillet cap for organizing is a fillet cap body having a cylindrical tip portion that fits with a predetermined gap on the outer peripheral surface of the end portion of the gas conduit, and an inner side from the open end of the fillet cap body A seal holding member that is fixed to the fillet cap body at a position apart from the gas pipe and projects toward the opening end side of the fillet cap body and has a seal member holding part having a smaller diameter than the gas conduit, and the fillet cap In the body, an annular groove formed by a fillet cap body and a seal holding member having a seal member holding part, and a heat-resistant annular seal part fitted in the annular groove Based organizer fillet cap, characterized in that it comprises and.   2. The fillet cap method for original arrangement according to claim 1, wherein the heat-resistant annular sealing member is made of silicone rubber.   The fillet cap for organizing according to claim 1 or 2, wherein the heat-resistant annular seal member and the heat-resistant seal holding member are fixed with an adhesive.   The fillet cap for organizing according to any one of claims 1 to 3, wherein the heat-resistant annular seal member is an annular plate.   The main body of the seal holding member is a disk-shaped main body, and the outer edge of the disk-shaped main body is fixed to the inner peripheral surface of the fillet cap main body by welding. Original fillet cap for organizing according to any of the above.