DE1966998U - CORROSION PROTECTION SHEATH, IN PARTICULAR FOR BIG METAL PIPES. - Google Patents
CORROSION PROTECTION SHEATH, IN PARTICULAR FOR BIG METAL PIPES.Info
- Publication number
- DE1966998U DE1966998U DEF32404U DEF0032404U DE1966998U DE 1966998 U DE1966998 U DE 1966998U DE F32404 U DEF32404 U DE F32404U DE F0032404 U DEF0032404 U DE F0032404U DE 1966998 U DE1966998 U DE 1966998U
- Authority
- DE
- Germany
- Prior art keywords
- corrosion protection
- layers
- impregnated
- layer
- metal pipes
- 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
- 238000005260 corrosion Methods 0.000 title claims description 18
- 230000007797 corrosion Effects 0.000 title claims description 16
- 239000002184 metal Substances 0.000 title claims description 5
- IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 title 1
- 239000007990 PIPES buffer Substances 0.000 title 1
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000011152 fibreglass Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
RA.347248*22.6.S7 7RA.347248 * 22.6.S7 7
FELTEN & GUILLEAUME CARLSWERK AKTIENGESELLSCHAFT 5 KÖLN-MÜLHEIM · SCHANZENSTRASSE 24 FELTEN & GUILLEAUME CARLSWERK AKTIENGESELLSCHAFT 5 COLOGNE-MÜLHEIM · SCHANZENSTRASSE 24
Fl. 3709 Köln-Mülheim, den 20. Juni 1967 Fl. 3709 Cologne-Mülheim, June 20, 1967
Wf /RhWf / Rh
Korrosionsschutzmantel, insbesondere für erdverlegte MetallrohreCorrosion protection jacket, especially for underground metal pipes
Die Neuerung bezieht sich auf einen mehrschichtigen Korrosionsschutzmantel für Rohre und rohrähnliche Gegenstände, der insbesondere für erdverlegte Metallrohre, wie z. B. für die Stahlrohre der Gas-, Wasser- und Ölleitungen sowie für die Druckrohre von elektrischen Kabelanlagen, geeignet ist. Die bisher meistens verwendeten Korrosionsschutzmäntel bestehen aus bitumengetränkten Glasfaser- oder Textilbändern. Soweit hierfür Textilbänder benutzt werden, haben sie den Nachteil, daß sie leicht Feuchtigkeit aufsaugen und verrotten, wodurch eine Korrosionsgefahr gegeben ist. Außerdem sind alle diese Bänder mechanisch nicht sehr widerstandsfähig. Andere bekannte Korrosionsschutzmäntel, die aus Kunststoff, wie z. B. Polyvinylchlorid oder Polyäthylen, in einer oder mehreren Schichten auf den zu schützenden Gegenstand nahtlos aufgepreßt oder aufgesintert oder in Bandform aufgebracht und gewickelt sind, bieten zwar einen besseren Schutz gegen Feuchtigkeit. Sie sind aber ebenfalls für viele Fälle, z. B. zum Verlegen in steinigem Boden, mechanisch nicht ausreichend widerstandsfähig. Insbesondere geben solche Schutzmäntel bei erhöhten TemperaturenThe innovation relates to a multi-layer corrosion protection jacket for pipes and pipe-like objects, especially for underground metal pipes such. B. for the steel pipes the gas, water and oil pipes as well as for the pressure pipes of electrical cable systems. The most commonly used so far Corrosion protection jackets consist of bitumen-soaked fiberglass or textile tapes. As far as textile straps are used for this are, they have the disadvantage that they easily absorb moisture and rot, which gives a risk of corrosion is. In addition, none of these tapes are mechanically very strong. Other well-known anti-corrosion jackets made from Plastic, such as B. polyvinyl chloride or polyethylene, seamlessly in one or more layers on the object to be protected pressed on or sintered on or applied in tape form and wound offer better protection against moisture. But they are also for many cases, e.g. B. for laying in stony ground, mechanically insufficiently resistant. In particular, such protective jackets give at elevated temperatures
Pl. 5709 20. Juni 1967 " - 2 -Pl. 5709 June 20, 1967 "- 2 -
schon bei statischem Druck leicht nach. Weiterhin kann sich der Kunststoffmantel auf dem Metallrohr bei Erwärmung auf Grund der unterschiedlichen Wärmeausdehnungskoeffizienten leicht verschieben. even with static pressure. Furthermore, the plastic jacket on the metal pipe when heated due to the Slightly shift different coefficients of thermal expansion.
Neuerungsgemäß ist der Korrosionssehutzmantel aus mindestens einer '■> inneren Schicht aus thermoplastischem oder thermoelastischem Kunststoff und mindestens einer äußeren Schicht aus mit Gießharz getränkter Glasseide aufgebaut. Die an sich im allgemeinen weniger harten und weniger wärmebeständigen inneren Schichten haben dabei im wesentlichen die Aufgabe, das Vordringen von Feuchtigkeit zu dem zu schützenden Gegenstand zu verhindern, während die wärmebeständigeren und zugleich zähen, harten und daher sehr schlag- und abriebfesten äußeren Schichten mechanische Schaden von den inneren Schichten fernhalten und den Peuchtigkeitsschutz der inneren Schichten auch bei erhöhter Temperatur gewährleisten. Diese Wirkung wird noch dadurch verstärkt, daß die äußeren Schichten beim Aushärten des in ihnen enthaltenden Gießharzes schrumpfen und hierdurch die inneren Schichten zwischen sich und der Unterlage unverrückbar festspannen. Im ganzen entsteht damit ein Korrosionsschutzmantel, der selbst bei geringer Gesamtdieke auch unter sehr rauhen Verlegungs- und Arbeitsbedingungen wirksam bleibt. Ein weiterer Vorteil ist die einfache und dauerhafte Färbbarkeit des neuen Schutzmantels, da die im wesentlichen aus Gießharz bestehenden äußeren Schichten an sich durchsichtig sind und daher eine Färbung der aus thermoplastischem oder thermoelastischem Kunst-According to the innovation, the corrosion protection coat consists of at least one '■> inner layer made of thermoplastic or thermoelastic Plastic and at least one outer layer made of glass fiber impregnated with casting resin. In general, they are less so Hard and less heat-resistant inner layers essentially have the task of preventing moisture from penetrating to prevent the object to be protected while the More heat-resistant and at the same time tough, hard and therefore very impact- and abrasion-resistant outer layers mechanical damage keep away from the inner layers and ensure the moisture protection of the inner layers even at high temperatures. This effect is reinforced by the fact that the outer layers When the resin contained in them cures, the inner layers between them and the base shrink Clamp immovably. Overall, a corrosion protection coat is created, which remains effective even under very rough laying and working conditions, even with a low overall thickness. A Another advantage is that the new protective sheath can be dyed easily and permanently, since it consists essentially of cast resin outer layers are transparent in themselves and therefore have a coloring of the thermoplastic or thermoelastic synthetic
* stoff bestehenden inneren Schichten zur Farbkennzeichnung genügt. Durch den starken mechanischen Zusammenhalt des Mantels wird auch* The existing inner layers are sufficient for color identification. Due to the strong mechanical cohesion of the jacket,
α eine etwaige gegenseitige Verschiebung der einzelnen Schichten, die sich aus unterschiedlichen Wärmedehnungen ergeben könnte, gehemmt. Im übrigen lassen sich solche Verschiebungen leicht dadurch verhindern, daß die Wärmedehnung der gießharzhaltigen äußeren Schichten durch entsprechende Bemessung ihres Glasseideanteils der Wärmedehnung der inneren Schichten angeglichen werden kann.α any mutual displacement of the individual layers, which could result from different thermal expansions, inhibited. Otherwise, such shifts can easily be made prevent the thermal expansion of the cast resin-containing outer layers by appropriately dimensioning their glass fiber content Thermal expansion of the inner layers can be adjusted.
Pl. 3709 20. Juni I967 - 3 -Pl. 3709 June 20, 1967 - 3 -
Bei einem Aufbau des Korrosionsschutzmantels mit mindestens zwei inneren Schichten bestehen vorteilhaft die der zu schützenden Oberfläche benachbarte untere bzw. die unteren inneren Schichten aus weicherem und die obere bzw. die oberen der genannten fit inneren Schichten aus härterem Kunststoff, beispielsweise die untere aus weichgemaehtem Polyvinylchlorid und die obere aus weichmacherarmen oder weichmacherfreien Hartpolyvinylchiorid. Alle diese Schichten können nahtlos gepreßt oder aus Band gewickelt sein, wobei im letztgenannten Falle eine überlappende Wicklung aus selbstklebenden Bändern vorzuziehen ist.If the corrosion protection jacket is constructed with at least two inner layers, the lower or lower inner layers adjacent to the surface to be protected are advantageously made of softer plastic and the upper or upper of the above-mentioned fit inner layers are made of harder plastic, for example the lower one made of softened polyvinyl chloride and the upper one made of low-plasticizer or plasticizer-free hard polyvinyl chloride. All of these layers can be pressed seamlessly or wound from tape, with an overlapping winding made from self-adhesive tapes being preferred in the latter case.
Die den Glasseideanteil enthaltenden äußeren Schichten des Korrosionsschutzmantels sind vorzugsweise aus mit Gießharz getränktem Glasseidegewebeband gewiekelt., das einen besseren Zusammenhalt gewährleistet als lose eingebettete Glasfasern. Auch hier empfiehlt es sich, mindestens zwei Schichten anzuordnen. Vorteilhaft enthalten dabei die untere bzw. die unteren dieser äußeren Schichten ein lockeres, d. h. mit mehr Zwischenraum behaftetes und infolgedessen für das Gießharz besser saugfähiges Gewebeband, um einerseits eine ausreichende Mindestschichtdicke zu gewährleisten und um andererseits durch den höheren Gießharzgehalt dieser Schichten eine bessere Bindung an die inneren Schichten zu erreichen, während die obere bzw. die oberen äußeren Schichten ein dichtes und glattes Gewebeband enthalten, um eine glattere und besonders harte Außenfläche des Korrosionsschutzmantels zu erzielen. Zugleich wird durch diesen Aufbau der inneren Schichten eine gute Längswasser-The outer layers of the corrosion protection jacket containing the fiberglass are preferably made of fiberglass fabric tape impregnated with cast resin. This ensures better cohesion guaranteed as loosely embedded glass fibers. Also recommends here it makes sense to arrange at least two layers. The lower or lower of these outer layers advantageously contain a loose, d. H. fraught with more space and consequently better absorbent fabric tape for the casting resin, on the one hand to ensure a sufficient minimum layer thickness and in order, on the other hand, to achieve better bonding to the inner layers due to the higher resin content of these layers, while the top or top outer layers contain a dense and smooth fabric tape to create a smoother and particularly hard outer surface to achieve the anti-corrosion coating. At the same time, this structure of the inner layers ensures good longitudinal water
* dichtigkeit und durch diesen Aufbau der äußeren Schichten eine schlagfeste und abriebfeste Außenfläche des Korrosionsschutzman-* tightness and due to this structure of the outer layers a impact-resistant and abrasion-resistant outer surface of the corrosion protection
* tels erreicht.* reached.
Die Zeichnung zeigt beispielsweise ein Stahlrohr mit einem besonders vorteilhaften Korrosionsschutzmantel nach der Neuerung in schematischer Darstellung in Figur 1 in einer Ansicht und in Figur 2 im Querschnitt. Die einzelnen Schichten des Mantels sind in Figur 1 der besseren Sichtbarkeit wegen stufenweise abgesetzt.For example, the drawing shows a steel pipe with a special advantageous corrosion protection coat according to the innovation in a schematic representation in Figure 1 in a view and in Figure 2 in cross section. The individual layers of the jacket are stepped off in FIG. 1 for better visibility.
Fl. 5709 20. Juni 1967Fl. 5709 June 20, 1967
Das Stahlrohr 1 ist zunächst mit einem üblichen Lacküberzug 2 versehen, der auch fehlen kann. Darüber folgen als innere Schichten eine Schicht 3 aus weichgemachtem Polyvinylchlorid und eine Schicht 4 aus Hartpolyvinylchlorid, von denen die letztgenannte eingefärbt ist. Diese Schichten sind beide aus selbstklebendem Band mit Überlappung gewickelt. Sie können aber auch aufgesintert oder, etwa mit einer Schneckenspritzmaschine, nahtlos gepreßt sein. Hierüber sind die äußeren Schichten 5 und β aus Glasseidengewebeband, das mit Polyesterharz unter Zusatz eines geeigneten Härters getränkt ist, gewickelt, und zwar die Schicht 5 unter Verwendung eines locker gewebten, flauschigen, gut saugfähigen und die Schicht 6, welche die Außenfläche des .Schutzmantels bildet, unter Verwendung eines dicht gewebten, glatten Glasseidebandes.The steel pipe 1 is initially provided with a conventional paint coating 2, which can also be missing. A layer 3 made of plasticized polyvinyl chloride and a layer follow as inner layers 4 made of rigid polyvinyl chloride, the latter of which is colored. These layers are both made of self-adhesive tape with an overlap wrapped. But they can also be sintered on or pressed seamlessly, for example with a screw injection molding machine. About this the outer layers 5 and β are made of fiberglass fabric tape, the is impregnated with polyester resin with the addition of a suitable hardener, wound, namely the layer 5 using a loosely woven, fluffy, well absorbent and layer 6, which forms the outer surface of the .Schutzmantels, using a tightly woven, smooth glass silk ribbon.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF32404U DE1966998U (en) | 1967-06-22 | 1967-06-22 | CORROSION PROTECTION SHEATH, IN PARTICULAR FOR BIG METAL PIPES. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF32404U DE1966998U (en) | 1967-06-22 | 1967-06-22 | CORROSION PROTECTION SHEATH, IN PARTICULAR FOR BIG METAL PIPES. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1966998U true DE1966998U (en) | 1967-08-24 |
Family
ID=33335316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEF32404U Expired DE1966998U (en) | 1967-06-22 | 1967-06-22 | CORROSION PROTECTION SHEATH, IN PARTICULAR FOR BIG METAL PIPES. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1966998U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2702064A1 (en) * | 1976-01-19 | 1977-07-21 | Sumitomo Metal Ind | Corrosion resistant coating for metal pipes - comprises urethane resin, petroleum resin(s) and reinforcing agents |
| DE102018132949A1 (en) * | 2018-12-19 | 2020-06-25 | Mannesmann Line Pipe Gmbh | Pipe made of steel with a plastic coating as a protective layer against mechanical damage, manufacturing process for this and piping from it |
-
1967
- 1967-06-22 DE DEF32404U patent/DE1966998U/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2702064A1 (en) * | 1976-01-19 | 1977-07-21 | Sumitomo Metal Ind | Corrosion resistant coating for metal pipes - comprises urethane resin, petroleum resin(s) and reinforcing agents |
| DE102018132949A1 (en) * | 2018-12-19 | 2020-06-25 | Mannesmann Line Pipe Gmbh | Pipe made of steel with a plastic coating as a protective layer against mechanical damage, manufacturing process for this and piping from it |
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