JPS6111776B2 - - Google Patents
Info
- Publication number
- JPS6111776B2 JPS6111776B2 JP5969576A JP5969576A JPS6111776B2 JP S6111776 B2 JPS6111776 B2 JP S6111776B2 JP 5969576 A JP5969576 A JP 5969576A JP 5969576 A JP5969576 A JP 5969576A JP S6111776 B2 JPS6111776 B2 JP S6111776B2
- Authority
- JP
- Japan
- Prior art keywords
- cheese
- length
- sheet
- pipe
- branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 235000013351 cheese Nutrition 0.000 claims description 34
- 238000005260 corrosion Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000002985 plastic film Substances 0.000 description 7
- 238000003466 welding Methods 0.000 description 5
- 238000005536 corrosion prevention Methods 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000006223 plastic coating Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Description
【発明の詳細な説明】
この発明は、配管施工の際に用いられるチーズ
の防食を能率よく、完全に行なうための方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for efficiently and completely preventing corrosion of cheese used in piping construction.
従来、配管施工において枝管を本管より出す場
合には、第１図および第２図に概略正面図で示さ
れるような、直管と直管とを溶接してＴ型とした
Ｔ字管（第１図）や、チーズ（第２図）が用いら
れている。 Conventionally, when a branch pipe is brought out from the main pipe during piping construction, a T-shaped pipe is formed by welding two straight pipes into a T-shape, as shown in schematic front views in Figures 1 and 2. (Fig. 1) and cheese (Fig. 2) are used.
上述のように直管の組合せであるＴ字管を用い
て溶接によつて本管に枝管をつなぐ場合には、前
記Ｔ字管と前記本管および枝管との溶接部は、管
取出部から十分に距離があるために、前記Ｔ字管
の防食に関しては、前記Ｔ字管の本管および枝管
との溶接部近傍を除いてその本体を工場で十分に
防食被覆しておくことが可能なので、配管施工現
地では、前記Ｔ字管の本管および枝管との溶接端
部のみを防食被覆すればよいことになるから、そ
の防食施工は容易である。 When connecting a branch pipe to a main pipe by welding using a T-shaped pipe that is a combination of straight pipes as described above, the welded part between the T-shaped pipe and the main pipe and branch pipe is In order to prevent corrosion of the T-shaped pipe, the main body of the T-shaped pipe should be sufficiently coated with anti-corrosion coating at the factory, except for the vicinity of the welded part between the main pipe and the branch pipe. Therefore, at the piping construction site, only the welded ends of the T-shaped pipe with the main pipe and the branch pipe need to be coated with anti-corrosion coating, so the anti-corrosion work is easy.
これに対して、直管部をもたず、形が小さく、
しかも本管および枝管との溶接部が接近している
と共に前記溶接部近傍が曲面を呈しているチーズ
を用いて配管施工する場合には、前記チーズに対
して上記Ｔ字管のようにあらかじめ工場で防食被
覆を施こしておくことは不可能であり、したがつ
て配管施工後、現地において前記本管および枝管
とチーズとの溶接部を含む前記チーズに対して防
食被覆を行なわざるを得ない。 On the other hand, it does not have a straight pipe part and is small in shape.
Moreover, when constructing piping using a cheese whose welds between the main pipe and branch pipes are close to each other and where the vicinity of the weld has a curved surface, it is necessary to It is impossible to apply anti-corrosion coating at the factory, so after piping construction, it is necessary to apply anti-corrosion coating to the cheese, including the welded parts of the main pipe and branch pipes to the cheese, on site. I don't get it.
従来、このような配管施工後のチーズに対する
現地防食方法としては、
アスフアルト粘板の巻きつけ、
防食シートおよび防食テープの巻きつけ、
などの方法が知られている。 Conventionally, known on-site corrosion prevention methods for such piping after construction include wrapping asphalt slate, wrapping anticorrosion sheets and anticorrosion tape, and so on.
上記方法はアスフアルト被覆管の配管施工に
は適するが、プラスチツク被覆管の配管施工に対
しては体積固有抵抗などの問題があつて必ずしも
適した防食方法とは言えないところがある。 Although the above method is suitable for piping construction using asphalt cladding, it cannot necessarily be said to be a suitable corrosion prevention method for piping construction using plastic cladding due to problems such as volume resistivity.
また上記方法は、現在一般にプラスチツク被
覆管に適用されている防食方法であり、第３図お
よび第４図には概略縦断面図および正面図で前記
方法の防食被覆態様が示されている。図示され
るように、前記方法は、まず本管１および枝管
２の溶接端部を含むチーズ３の外面にアンダーコ
ート４を薄く塗布し、ついで防食シート５を所定
の個所に切り込みを入れて溶接個所７および前記
チーズ３を覆うように張りつけ、前記防食シート
張りつけ後、防食テープ６を1/2ラツプの２回巻
きによつて第４図に示されるように巻きつけて防
食被覆することにより行なわれている。なお、図
面において、８および９は本管１および枝管２に
あらかじめ被覆されているプラスチツク被膜であ
る。 The above-mentioned method is a corrosion-preventing method that is currently generally applied to plastic cladding tubes, and FIGS. 3 and 4 show the anti-corrosion coating mode of the method in a schematic longitudinal sectional view and a front view. As shown in the figure, the method involves first applying a thin undercoat 4 to the outer surface of the cheese 3 including the welded ends of the main pipe 1 and branch pipes 2, and then cutting the anticorrosion sheet 5 at predetermined locations. The welding area 7 and the cheese 3 are pasted to cover them, and after the anticorrosion sheet is pasted, the anticorrosive tape 6 is wrapped twice in a 1/2 wrap as shown in FIG. 4 to provide an anticorrosive coating. It is being done. In the drawings, numerals 8 and 9 indicate plastic coatings that are previously coated on the main pipe 1 and the branch pipes 2.
しかしながら、上記方法においては、
アンダーコート４を均一に塗布するとが困難
で熟練と時間を要する。 However, in the above method, it is difficult to uniformly apply the undercoat 4 and requires skill and time.
防食テープ６を巻きつける時に首の部分のた
すきがけが難しく、すれるおそれがある。 When wrapping the anti-corrosion tape 6, it is difficult to cross the neck part, and there is a risk of it rubbing.
第４図に示されるように、防食テープ６の被
覆できない３角形状部分ができる。 As shown in FIG. 4, a triangular portion is formed that cannot be covered with the anticorrosive tape 6.
などの問題があり、その防食施工が非常に困難で
ある。These problems make it extremely difficult to carry out anti-corrosion construction.
この発明は、上述のような従来防食方法のも
つ問題点を解決したチーズの現地防食方法を提供
するもので、チーズを用いて本管に枝管を配管施
工するに際して、前記チーズを、中央部を平行に
形成し、両端を円弧状に切欠いて２股に分岐して
形成してなる粘着剤付熱収縮性プラスチツクシー
トで被覆するとともに、前記本管と枝管の未被覆
部を矩形の粘着剤付熱収縮性プラスチツクシート
で前記本管と枝管の被覆層及び前記チーズを被覆
したシートと一部ラツプさせて被覆することによ
り、チーズを簡単な操作で能率よく、しかも完全
に防食することに特徴を有するものである。 This invention provides an on-site corrosion prevention method for cheese that solves the problems of the conventional corrosion prevention methods as described above. are formed parallel to each other and covered with an adhesive-coated heat-shrinkable plastic sheet formed by branching into two branches with arc-shaped notches at both ends, and rectangular adhesive-coated parts of the main pipe and branch pipes are covered with a heat-shrinkable plastic sheet. To efficiently and completely protect cheese from corrosion with a simple operation by partially wrapping the coating layer of the main pipe and branch pipes and the sheet covering the cheese with a heat-shrinkable plastic sheet coated with an agent. It has the following characteristics.
つぎに、この発明を実施例により図面とともに
説明する。 Next, the present invention will be explained with reference to examples and drawings.
第５図は、この発明によつてチーズに防食を施
した場合の防食態様を示す断面図である。 FIG. 5 is a cross-sectional view showing the anticorrosion mode when cheese is anticorrosive according to the present invention.
まず、第６図に示すような平面形状すなわち、
中央部を平行に形成し、両端を円弧状に切欠いて
２股に分岐して形成してなる粘着剤付熱収縮性プ
ラスチツクシート１０を、溶接個所７を含むチー
ズ３の肩のところまで巻き付ける。その後、第８
図に示すように前記シート１０の両端をチーズの
首、すなわち立上り管の中央部分にその管軸方向
に沿つて貼り付け、そして前記シート１０のａ端
をシート１０が浮くように本管１の一個所に貼付
け、弱火のバーナー１３でシート１０が少し柔ら
かくなるまで加熱して前記シート１０を引張り気
味に前記立上り管の部分に巻付け、加熱収縮させ
る。次に、本管１と枝管２の未被覆部に第７図に
示すような矩形の粘着剤付熱収縮性プラスチツク
シート１１及び１２をチーズ３に被覆したシート
１０と本管１と枝管２の被覆層８及び９と一部ラ
ツプさせて巻付け加熱収縮させる。 First, the planar shape as shown in FIG.
An adhesive-applied heat-shrinkable plastic sheet 10, which is formed parallel to each other at the center and branched into two with arc-shaped notches at both ends, is wrapped up to the shoulder of the cheese 3 including the welding location 7. Then the 8th
As shown in the figure, both ends of the sheet 10 are attached to the neck of the cheese, that is, the central part of the riser pipe along the pipe axis direction, and the a-end of the sheet 10 is attached to the main pipe 1 so that the sheet 10 floats. The sheet 10 is pasted in one place, heated with a low-heat burner 13 until it becomes a little soft, and the sheet 10 is wrapped around the riser pipe with some tension to shrink it by heating. Next, the uncoated parts of the main pipe 1 and branch pipes 2 are covered with rectangular adhesive-coated heat-shrinkable plastic sheets 11 and 12 as shown in FIG. It is partially wrapped with the coating layers 8 and 9 of No. 2, wrapped around it, and heated and shrunk.
なお、チーズ３に被覆する粘着剤付熱収縮性プ
ラスチツクシート１０の各部の寸法は、以下の通
りである。すなわち、中央部の全長Ａは、枝管２
の被覆層９端からチーズ３を廻り対面の枝管被覆
層端に達する長さにシート１２とのラツプ代を加
えた長さであり、中央の平行部の巾Ｂは、チーズ
３を覆いシート１１とのラツプ代を有する長さで
あり、前記中央平行部の長さＣは、チーズ３の立
上り管のつけ根から管周を廻り反対側のつけ根ま
での長さであり、両端の分岐部の円弧状部の巾Ｄ
は、枝管２の半円周にラツプ代を加えた長さで、
弧の形状は枝管２の半円周に沿つた形状とする。
また、前記円弧状部に隣接する辺Ｅの長さは、チ
ーズ３の肩の曲りの長さにシート１１及び１２と
のラツプ代を加えた長さであり、更にＣとＥ間の
辺Ｆの長さは、チーズ３の肩部の半分を覆う長さ
に反対側からのシートとのラツプ代を加えた長さ
である。 The dimensions of each part of the adhesive-coated heat-shrinkable plastic sheet 10 covering the cheese 3 are as follows. In other words, the total length A of the central part is the branch pipe 2
The length is the sum of the length from the end of the coating layer 9 around the cheese 3 to the end of the opposing branch pipe coating layer plus the lap margin with the sheet 12, and the width B of the central parallel part is the width B of the sheet covering the cheese 3. 11, and the length C of the center parallel part is the length from the base of the rising pipe of the cheese 3 to the base on the opposite side around the tube circumference, and Width D of arc-shaped part
is the length of the semi-circumference of branch pipe 2 plus the wrap allowance,
The shape of the arc follows the semicircumference of the branch pipe 2.
Further, the length of the side E adjacent to the arcuate portion is the length of the curve of the shoulder of the cheese 3 plus the overlap margin with the sheets 11 and 12, and the length of the side E between C and E The length is the length that covers half of the shoulder of the cheese 3 plus the amount of overlap with the sheet from the opposite side.
一方、シート１１，１２の巾は、未被覆部の長
さに、被覆層８，９及びシート１０とのラツプ代
を合わせた長さで、その長さは、本管１又は枝管
２の全周に適当なラツプ代を合わせた長さとす
る。 On the other hand, the width of the sheets 11 and 12 is the sum of the length of the uncoated part and the wrap length between the coating layers 8 and 9 and the sheet 10, and the width is the length of the main pipe 1 or the branch pipe 2. The length should be the entire circumference with an appropriate lap allowance.
但し、上記各部寸法は収縮後の長さであり、実
際には上記各寸法に収縮代を加えた長さのものを
使用する。 However, the above dimensions are the lengths after shrinkage, and in reality, the lengths obtained by adding the shrinkage allowance to the above dimensions are used.
なお、上記実施例では、１回被覆の防食態様に
ついて述べたが、必要に応じて同じ作業を繰り返
して２重被覆またはこれ以上の積層被覆にしても
よく、さらに耐衝撃性を付与するために保護シー
トを張りつけても、また管体のプラスチツク被膜
部、シート同志のラツプ部、および溶接個所（ビ
ード部）にマスチツクテープを巻きつけてもよ
い。 In addition, in the above example, the corrosion protection aspect of one coating was described, but if necessary, the same operation may be repeated to form a double coating or more laminated coating. A protective sheet may be applied, or mastic tape may be wrapped around the plastic coating of the tube, the laps between the sheets, and the welded areas (beads).
以上説明したように、この発明の防食法によれ
ば、上記従来方法で要する労力の約1/2で、し
かもその約2/3の作業時間で防食被覆処理するこ
とができると共に、防食被覆処理後のチーズは
1011Ω以上の良好な絶縁抵抗値をもつようになる
など工業上有用な効果がもたらされるのである。 As explained above, according to the anti-corrosion method of the present invention, it is possible to perform anti-corrosive coating treatment with about 1/2 of the labor required by the above-mentioned conventional method, and in about 2/3 of the working time. The next cheese is
This brings about industrially useful effects such as a good insulation resistance value of 10 11 Ω or more.
第１図はＴ字管の正面図、第２図はチーズの正
面図、第３図および第４図は従来方法によるチー
ズの防食態様を示す断面図、および正面図、第５
図は、この発明によりチーズに防食を施した場合
の防食態様を示す断面図、第６図及び第７図は、
この発明によるチーズの防食に使用するシートの
平面図、第８図は、同防食態様を示す概略斜視図
である。図面において、
１……本管、２……枝管、３……チーズ、４…
…アンダーコート、５……防食シート、６……防
食テープ、７……溶接個所、８，９……プラスチ
ツク被覆層、１０，１１，１２……粘着剤付熱収
縮性プラスチツクシート、１３……バーナー。
Fig. 1 is a front view of the T-tube, Fig. 2 is a front view of the cheese, Figs.
The figure is a sectional view showing the anti-corrosion mode when cheese is anti-corrosive according to the present invention, and Figs. 6 and 7 are
FIG. 8 is a plan view of a sheet used for corrosion protection of cheese according to the present invention, and is a schematic perspective view showing the corrosion protection mode. In the drawing, 1...main pipe, 2...branch pipe, 3...cheese, 4...
...Undercoat, 5...Anti-corrosion sheet, 6...Anti-corrosion tape, 7...Welding location, 8, 9...Plastic coating layer, 10, 11, 12... Heat-shrinkable plastic sheet with adhesive, 13... burner.
Claims (1)
するに際して、中央部が平行であり、両端が円弧
状に切り欠かれ２股に分岐している粘着剤付熱収
縮性プラスチツク製のシート１０により前記チー
ズ３を被覆し、前記本管１および前記枝管２の未
被覆部を、粘着剤付熱収縮性プラスチツク製の矩
形シート１１および１２により、前記本管１およ
び前記枝管２の被覆部および、前記チーズ３を被
覆した前記シート１０と一部ラツプさせて被覆
し、前記シート１０により前記チーズ３を被覆す
る際には、前記シート１０が軟化するまでこれを
加熱しながら前記シート１０を引張つて前記チー
ズ３の立上り管に巻付け、前記シート１０の各部
は、中央部の全長Ａが、前記枝管２の被覆層９端
から前記チーズ３を廻り対面の枝管被覆層端に達
する長さに前記矩形シート１２とのラツプ代を加
えた長さを有し、中央の平行部の巾Ｂが、前記チ
ーズ３を覆い、前記矩形シート１１とのラツプ代
を有する長さを有し、前記中央平行部の長さＣ
が、前記チーズ３の立上り管のつけ根から管周を
廻り反対側のつけ根までの長さを有し、両端の分
岐部の円弧状部の巾Ｄが、枝管２の半円周にラツ
プ代を加えた長さを有し、前記円弧状部は枝管２
の半円周に沿つた形状であり、前記円弧状部に隣
接する辺Ｅの長さが、チーズ３の肩の曲りの長さ
に矩形シート１１及び１２とのラツプ代を加えた
長さを有し、そして、ＣとＥ間の辺Ｆの長さが、
チーズ３の肩部の半分を覆う長さに反対側からの
前記シート１０とのラツプ代を加えた長さを有す
ることを特徴とする、配管施工におけるチーズの
防食方法。1 When constructing the branch pipe 2 to the main pipe 1 using the cheese 3, use a heat-shrinkable plastic pipe with an adhesive, whose central part is parallel and both ends are cut out in an arc shape and branch into two branches. The cheese 3 is covered with a sheet 10, and the uncoated parts of the main pipe 1 and the branch pipes 2 are covered with rectangular sheets 11 and 12 made of adhesive-coated heat-shrinkable plastic. When covering the cheese 3 with the sheet 10, the sheet 10 is heated while being heated until the sheet 10 is softened. The sheet 10 is stretched and wrapped around the riser pipe of the cheese 3, and each part of the sheet 10 has a total length A at the center extending from the end of the coating layer 9 of the branch pipe 2 around the cheese 3 to the opposing branch pipe coating layer. The width B of the central parallel portion covers the cheese 3 and has a length that is the sum of the length reaching the end and the overlap margin with the rectangular sheet 11. and the length C of the central parallel part
has a length from the base of the riser pipe of the cheese 3 to the base on the opposite side around the pipe periphery, and the width D of the arc-shaped part of the branch part at both ends is a wrap width around the semicircumference of the branch pipe 2. The arcuate portion has a length of branch pipe 2
The length of the side E adjacent to the arcuate portion is equal to the length of the shoulder of the cheese 3 plus the overlap with the rectangular sheets 11 and 12. and the length of side F between C and E is
A method for preventing corrosion of cheese in piping construction, characterized by having a length that covers half of the shoulder of the cheese 3 plus a lap allowance with the sheet 10 from the opposite side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5969576A JPS52142777A (en) | 1976-05-25 | 1976-05-25 | Method of antiicorrosive performance of cheese in piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5969576A JPS52142777A (en) | 1976-05-25 | 1976-05-25 | Method of antiicorrosive performance of cheese in piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52142777A JPS52142777A (en) | 1977-11-28 |
| JPS6111776B2 true JPS6111776B2 (en) | 1986-04-04 |
Family
ID=13120590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5969576A Granted JPS52142777A (en) | 1976-05-25 | 1976-05-25 | Method of antiicorrosive performance of cheese in piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS52142777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01229827A (en) * | 1988-03-09 | 1989-09-13 | Toyota Autom Loom Works Ltd | Sensor for abnormality in rotation of spindle driving motor in ring spinning machine or the like |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939393U (en) * | 1982-09-06 | 1984-03-13 | 日東電工株式会社 | Covering member |
| JPS59118892U (en) * | 1983-01-31 | 1984-08-10 | 積水化学工業株式会社 | Corrosion prevention sheet |
| JPS59226795A (en) * | 1983-06-08 | 1984-12-19 | 古河電気工業株式会社 | Corrosion protection executing method of different diameter section |
| JPS6090739A (en) * | 1983-10-24 | 1985-05-21 | Ube Ind Ltd | Covering method of t-shaped tube |
| JP5566951B2 (en) * | 2011-06-14 | 2014-08-06 | 古河電気工業株式会社 | Branch structure of resin piping and method for forming the same |
-
1976
- 1976-05-25 JP JP5969576A patent/JPS52142777A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01229827A (en) * | 1988-03-09 | 1989-09-13 | Toyota Autom Loom Works Ltd | Sensor for abnormality in rotation of spindle driving motor in ring spinning machine or the like |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52142777A (en) | 1977-11-28 |
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