JPH01147081A - Corrosion protection of joint between stake and coated steel pipe - Google Patents
Corrosion protection of joint between stake and coated steel pipeInfo
- Publication number
- JPH01147081A JPH01147081A JP62303353A JP30335387A JPH01147081A JP H01147081 A JPH01147081 A JP H01147081A JP 62303353 A JP62303353 A JP 62303353A JP 30335387 A JP30335387 A JP 30335387A JP H01147081 A JPH01147081 A JP H01147081A
- Authority
- JP
- Japan
- Prior art keywords
- joint
- coated steel
- sheet
- corrosion
- rubber asphalt
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 230000007797 corrosion Effects 0.000 title abstract description 10
- 238000005260 corrosion Methods 0.000 title abstract description 10
- 239000010426 asphalt Substances 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 4
- 239000011162 core material Substances 0.000 claims abstract 3
- 239000004698 Polyethylene Substances 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000005536 corrosion prevention Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 4
- 230000003405 preventing effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】 接で連結する継部の防蝕方法に関するものである。[Detailed description of the invention] The present invention relates to a method for preventing corrosion of joints that are connected by contact.
１ｊ７）従来、端部に鋼材を装眉するコンクリート製抗
体や塗覆装鋼管等の溶接継部は、連結初期においては曲
げ、引張などｌこ対して十分な耐力を有しているが、化
学作用を伴う侵食には極めて弱い。1j7) Conventionally, welded joints made of concrete or coated steel pipes with steel at the ends have sufficient strength against bending and tension at the initial stage of connection, but chemical It is extremely vulnerable to erosion accompanied by action.
従って、長期的な基礎構造体や管路としての機能を失う
などの欠点を有している。Therefore, it has drawbacks such as losing its long-term function as a basic structure or conduit.
本発明は、鋼材の溶接継部における化学的腐食を防止し
て、半永久的に基礎構造体や排水管路としての機能を維
持しようとするものである。The present invention aims to prevent chemical corrosion at welded joints of steel materials and maintain their functions as foundation structures and drainage pipes semi-permanently.
引張伸率が大きく、且つ自着性に富むゴムアスファルト
と引張伸率に優れた薄肉の特殊ポリエチレンフィルムと
ｔこよって構成するシートを溶接ｌこよって連結する抗
体および塗覆装鋼管と継部全周罎こ、圧着若しくは溶着
して化学的腐食を防止する。Rubber asphalt with high tensile elongation and excellent self-adhesiveness and thin special polyethylene film with excellent tensile elongation are welded to connect the antibody, coated steel pipe, and all joints. Prevent chemical corrosion by crimping or welding.
引張伸率が大きく且つ粘着性に富むゴムアスファルトシ
ートを鋼面に貼看するとその界面ではゴムアスファルト
のレベリング現象と界面にファンデルワルスの力が作用
して貼涜の徐に界面ｉこ発生−た。When a rubber asphalt sheet with high tensile elongation and high adhesiveness is pasted on a steel surface, the leveling phenomenon of the rubber asphalt and Van der Wals' force act on the interface, and as a result of the pasting, interfacial damage occurs. Ta.
全に密着するので２ Ｋｇ／ｄｔの水圧の処でも接着面
に透水することがないことは実ｊ′ａで判明しました。It has been found through actual experiments that water does not permeate through the adhesive surface even under water pressure of 2 kg/dt because it adheres completely to the surface.
又、ゴムアスファルト層に特殊ポリエチレンシートフィ
ルム厚さ５０μ〜５００μを挟入したゴムアスフ゛アル
ドシートは透湿係数が殆んど０．００であります。In addition, the rubber asphalt sheet, which is made by sandwiching a special polyethylene sheet film with a thickness of 50μ to 500μ in the rubber asphalt layer, has a moisture permeability coefficient of almost 0.00.
このシートを鋼面に接着した接着面へは外面から空気や
水蒸気は漏入しないので、接着部の鋼面ば空気や水蒸気
との接触がなくなるので鋼面の酸化が完全に防止されま
す。且つ、このゴムアスファルトシートは電気的絶縁性
が優れているので電蝕が防止されるので防蝕効果が著し
い。Since air and water vapor do not leak from the outside to the adhesive surface where this sheet is adhered to the steel surface, oxidation of the steel surface is completely prevented as there is no contact with air or water vapor on the steel surface of the adhesive part. In addition, this rubber asphalt sheet has excellent electrical insulation properties, which prevents electrolytic corrosion and has a remarkable corrosion-preventing effect.
実施に使用したゴムアスファルトシートの構成及び性状
を別紙第一図で説明します。The composition and properties of the rubber asphalt sheet used in the experiment are explained in attached Figure 1.
第一図はゴムアスファルトシーＢｓ）の断面）図で、異
面は剥離紙（１）、裏面は剥離紙（４）で、ゴムアスフ
ァルト層（２）の粘着面を保護し、中間に挟入−した％
殊ポリエチレンフィルム（３）は厚さ２００μで牙。特
殊ポリエチレンフィルムとはエチレン、プロピレンの共
重合体であります。このフィルムはゴムアスファルトと
はブリードすることはありません。Figure 1 is a cross-sectional view of the rubber asphalt sheet (Bs), where the different side is release paper (1), and the back side is release paper (4), which protects the adhesive surface of the rubber asphalt layer (2) and is sandwiched in between. −%
The special polyethylene film (3) has a thickness of 200μ. Special polyethylene film is a copolymer of ethylene and propylene. This film will not bleed with rubber asphalt.
性状
ａ 厚さ ２關
ｂ 透湿係数 Ｇｒａｉｎ／ｆｔ” ｈ＋ｇＨｇ Ｑ、
ＱＱＣ吸水ｉｉ ７２Ｈｒ Ｏ，２％ｆ 引裂
強ざ ４．０に９
ｇ 接着強さ（剪断） ２４に９／４０ＪｌｌＸ ４
０１ｍ！ｈ 水中２ｋｇ／ｃｄ１６８時間接着面に水は
浸入なし。Properties a Thickness 2b Moisture permeability coefficient Grain/ft” h+gHg Q,
QQC water absorption II 72Hr O, 2%f Tear strength 4.0 to 9 g Adhesive strength (shear) 24 to 9/40JllX 4
01m! h No water entered the adhesive surface for 2 kg/cd in water for 168 hours.
例 Ｉ
別紙第二、三図は鋼管の溶接継部にゴムアスファルトシ
ートで接着施工したもので、第二図はその断面図で、第
三図は第二図のＡ〜Ａ１セクションを示すものでありま
す。Example I Attachments 2 and 3 show the welded joints of steel pipes bonded with rubber asphalt sheets, the second figure is a cross-sectional view, and the third figure shows sections A to A1 in Figure 2. there is.
鋼管（５）の溶接継部（６）を清掃して平滑にケレンし
た後にゴムアスファルトプライマー（７）を塗付して乾
燥したことを確認したらゴムアスファルトシート（Ｓ）
を空気を抱込まないように圧着しながら施工する。接合
部（８）はオーバーラツプ１００關以上トシてプロパン
バーナーで溶着する。After cleaning and smoothing the welded joint (6) of the steel pipe (5), apply the rubber asphalt primer (7) and after confirming that it is dry, apply the rubber asphalt sheet (S).
Work while crimping to avoid trapping air. The joint (8) is welded using a propane burner with over 100 degrees of overlap.
オーバーラツプの接合部を単に圧着して接着すると長時
間に作用する応力に対しては接着強度は接着仕事量１０
８〜１０”ｅｒｇ／ｃｄ程度と考へられるので余りに小
さいのでこの部分は溶着することで接着強さを改善する
。If the overlap joint is simply crimped and bonded, the bond strength will be 10% of the bonding work against the stress that is applied over a long period of time.
Since it is considered to be about 8 to 10" erg/cd, which is too small, this portion is welded to improve the adhesive strength.
例 ｌ
海中又は水中に使用する鋼管の溶接継部の防食方法とし
ては、ゴムアスファルトシートの接着端部が水中に於て
長期間に亘り水の流れ其の低応力を受けると接着強度は
接着仕事量の強度と推定されるので端部の剥離を予防す
るための収縮性ポリエチレンチューブ巾１００間のもの
を加熱収縮させ゛て貼着する。Example 1 As a corrosion protection method for welded joints of steel pipes used in the sea or underwater, if the bonded end of a rubber asphalt sheet is submerged in water for a long period of time and is subjected to the low stress caused by the flow of water, the bond strength will decrease due to the adhesive work. Since the strength is estimated to be about the same, a shrinkable polyethylene tube with a width of 100 mm is heat-shrinked and attached to prevent peeling at the ends.
ン
−別紙第四、三図は実施例の構成を示す説明図でありま
す。Figures 4 and 3 of the attached sheet are explanatory diagrams showing the configuration of the embodiment.
ゴムアスファルトシートの施工は第二、三図と同様であ
ります。ポリエチレンチューブを予め嵌込んで置いてゴ
ムアスファルトシートを施工した后にプロパンバーナー
で加熱収縮して貼着するのであります。かくすることで
端部の剥離が抑止される。The construction of the rubber asphalt sheet is the same as shown in Figures 2 and 3. After the polyethylene tube is inserted in advance and the rubber asphalt sheet is installed, it is heated and shrunk using a propane burner and attached. This prevents peeling of the ends.
この施工法は簡単で且つ鋼管継部を被惜寸法の如何に拘
らず適用出来て且つコスト的にも有利であります。This construction method is simple, can be applied to steel pipe joints regardless of the size of the joint, and is advantageous in terms of cost.
第一図はゴムアスファルトシートの構成を示す断面図で
す。
（Ｓ） ゴムアスファルトシート
（１） 剥離紙
（２） ゴムアスファルトコンパウンド（３）特殊ポ
リエチレンフィルム
（４）剥離紙
第二図は鋼・ｇの溶接継部にゴムアスファルトシー ト
（ｓ）を施工した構成を示す断面図です。
（Ｓ） ゴムアスファルトシート
（５）鋼管
（６）鋼管の溶接継部のビード
（７）ゴムアスファルトブライマー
第三図は第二図のＡＳ−Ａ’セクションを示す縦断面図
です。
（８） ゴムアスファルトシートのオーバーラツプ接
合部
第四図は鋼管の溶接継部にゴムアスファルトシー ）
（Ｓ）を施工した上にシートの端部に剥離を防止するよ
うに収縮性ポリエチレンチューブ巾１００顛を加熱収縮
施工した断面図です。
（９）収縮性ポリエチレンチューブ巾１００ ｔｒｉ第
五図は第四図のＢ−Ｂｌセクションを示す縦断面図です
。
峙許出願人 日本ヒユーム管株式会社
早−ｍ
Ｌ７ΣFigure 1 is a cross-sectional view showing the composition of a rubber asphalt sheet. (S) Rubber asphalt sheet (1) Release paper (2) Rubber asphalt compound (3) Special polyethylene film (4) Release paper Figure 2 shows the rubber asphalt sheet (s) applied to the welded joint of steel/g. This is a cross-sectional view showing the configuration. (S) Rubber asphalt sheet (5) Steel pipe (6) Bead of welded joint of steel pipe (7) Rubber asphalt brimer Figure 3 is a longitudinal sectional view showing the AS-A' section in Figure 2. (8) Overlapping joints of rubber asphalt sheets (Figure 4 shows rubber asphalt sheets attached to welded joints of steel pipes)
This is a cross-sectional view of (S) and heat-shrinked 100mm wide shrinkable polyethylene tube on the edge of the sheet to prevent peeling. (9) Shrinkable polyethylene tube width 100 tri Figure 5 is a longitudinal sectional view showing the B-Bl section in Figure 4. Applicant: Nippon Huyum Kan Co., Ltd. Haya-m L7Σ
Claims (1)
に、厚さ５００μ以下の特殊ポリエチレンフィルムを芯
材とするゴムアスファルトシートを、圧着若しくは溶着
して貼合せることを特徴とする抗体および塗覆装鋼管の
継部防蝕方法。An antibody and an antibody characterized in that a rubber asphalt sheet having a core material of a special polyethylene film with a thickness of 500 μ or less is bonded or welded to the entire circumference of the joint of a pile body and a coated steel pipe that are connected by welding. Corrosion prevention method for joints of coated steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62303353A JPH01147081A (en) | 1987-12-02 | 1987-12-02 | Corrosion protection of joint between stake and coated steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62303353A JPH01147081A (en) | 1987-12-02 | 1987-12-02 | Corrosion protection of joint between stake and coated steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01147081A true JPH01147081A (en) | 1989-06-08 |
Family
ID=17919955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62303353A Pending JPH01147081A (en) | 1987-12-02 | 1987-12-02 | Corrosion protection of joint between stake and coated steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01147081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454832U (en) * | 1990-09-14 | 1992-05-11 | ||
| CN109208583A (en) * | 2018-09-27 | 2019-01-15 | 陈溯源 | A kind of precast pipe pile splicing multi-section reinforced joint structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5392523A (en) * | 1977-01-24 | 1978-08-14 | Towa Kogyo Kk | Laminated waterrproof sheet |
| JPS5696077A (en) * | 1980-11-28 | 1981-08-03 | Sumitomo Electric Ind Ltd | Corrosion preventive method for connecting part of anticorrosion steel pipe |
-
1987
- 1987-12-02 JP JP62303353A patent/JPH01147081A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5392523A (en) * | 1977-01-24 | 1978-08-14 | Towa Kogyo Kk | Laminated waterrproof sheet |
| JPS5696077A (en) * | 1980-11-28 | 1981-08-03 | Sumitomo Electric Ind Ltd | Corrosion preventive method for connecting part of anticorrosion steel pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454832U (en) * | 1990-09-14 | 1992-05-11 | ||
| CN109208583A (en) * | 2018-09-27 | 2019-01-15 | 陈溯源 | A kind of precast pipe pile splicing multi-section reinforced joint structure |
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