PIPE, PIPE CONNECTION AND MANUFACTURING METHOD THEREFOR

Description

[0001] The present invention relates to a pipe, of the type comprising the features of the preamble of claim 1.

[0002] Cast iron pipes are known which are internally provided, along their substantially cylindrical shaft, with a cement mortar coating. To deposit this coating in the pipe, the cement mortar is poured into the rotating pipe. In order to prevent axial flow of the mortar out of the shaft during the pouring of the mortar and the rotation of the pipe, the inner surface of the shaft is previously provided, at each end, with an annular stop, called a cement cutter, which serves as a formwork for the cement mortar.

[0003] On the plain end side, the stop acting as a cement cutter is a rubber disc which is put in place before pouring the mortar into the pipe, then removed after the hydraulic mortar has hardened.

[0004] On the interlocking end side, the stop used as a cement cutter is an annular rubber ring. This is put in place by hand before pouring the mortar, then removed after the cement mortar has set.

[0005] When removing the cement cutters, there is a risk of tearing off part of the mortar in contact with the cement cutter. This leads to the need to subsequently touch up the mortar, or even the paint if it was damaged during cleaning of the pipe to remove the mortar waste.

[0006] The known pipe is therefore not very economical to manufacture.

[0007] Other pipes are known from WO2014 / 079974, DE102018101178, FR2781546A1, GB2217418A, and US5955162A.

[0008] The aim of the invention is to propose a pipe which is more economical and easier to manufacture while having a cement mortar coating whose thickness is controlled and which does not require retouching after cementing.

[0009] Another object of the invention is to provide a pipe which has effective protection against corrosion, more particularly at its ends.

[0010] To this end, the invention relates to a pipe as defined above, characterized by the characteristics of the characterizing part of claim 1.

[0011] According to particular embodiments, the pipe according to the invention may have one or more of the characteristics of the dependent claims and / or one or more of the following characteristics, taken in all technically possible combinations: the pipe comprises a second annular barrier adapted to oppose an axial flow of the cement mortar in the non-solid state and wherein the second barrier is arranged at the second axial end of the barrel, the first barrier, if any, and / or the second barrier, is made of synthetic material, in particular elastomeric material and in particular EPDM (ethylene-propylene-diene) copolymer, or a thermoplastic material, in particular PP (polypropylene), PE (polyethylene), amorphous PET (polyethylene terephthalate) or PE / acrylic copolymer, or an anti-corrosion metal, in particular zinc (Zn)-based, or a hot-melt adhesive, or steel, and wherein preferably the first barrier, if any, and / or the second barrier, is made of a food-grade material. the first barrier is located axially in the fitting part of the base body or wherein the first barrier is located axially in the barrel.the socket liner is integral with the first barrier or wherein the first barrier is arranged on the socket liner. the socket portion comprises a socket bottom, wherein the pipe comprises a socket bottom protection member and wherein the first barrier is formed by the protection member. the pipe comprises a spigot end liner extending over the outer barrel surface and over the barrel front surface at the spigot end, and wherein the spigot end liner is connected to the second barrier, in particular the spigot end liner is integral with the second barrier or the second barrier is arranged on the spigot end liner.the base body comprises the support body and the anti-corrosion base layer, in particular wherein the anti-corrosion base layer contains zinc (Zn) and preferably is formed from an alloy of zinc (Zn), aluminum (Al) and copper (Cu), and wherein the pipe comprises a cover layer arranged at least on the anti-corrosion base layer, where appropriate the socket coating extending over the anti-corrosion base layer and the cover layer extending over the socket coating arranged on the outer socket surface. the spigot coating extends over the anti-corrosion base layer.

[0012] The invention further relates to a tubular junction comprising a first pipe and a second pipe, wherein the first pipe and the second pipe are connected to each other in a watertight manner and wherein at least one of the two pipes is a pipe as defined above.

[0013] The invention further relates to a method of manufacturing a pipe as defined above, comprising the following successive steps: providing the base body, applying the socket coating and the spigot coating to the base body, if applicable, applying the first barrier to the base body, if applicable, applying the second barrier to the base body, applying the cement mortar in a non-solid state to the inner surface of the barrel, solidifying the cement mortar to obtain the cement mortar coating and applying the cover layer.

[0014] The invention will be better understood on reading the following description, given solely by way of example and with reference to the appended drawings, in which: [ Fig 1 ] There Figure 1 is a longitudinal sectional view of a first embodiment of a pipe according to the invention; [ Fig 2 ] There Figure 2 is an enlarged view of detail II of the Figure 1 ; [ Fig 3 ] There Figure 3 is a sectional view of a detail of a variant of the pipe of the Figure 1 ; [ Fig 4 ] There Figure 4 is a longitudinal sectional view of a second embodiment of a pipe according to the invention; [ Fig 5 ] There Figure 5 is an enlarged view of detail V of the Figure 4 ; [ Fig 6 ] There Figure 6 is a longitudinal sectional view of a third embodiment of a pipe according to the invention; [ Fig 7 ] There Figure 7 is an enlarged view of a detail VII of the Figure 6 ; And [ Fig 8 ] There Figure 8 is a schematic view of a tubular junction according to the invention.

[0015] On the Figure 8 A tubular junction according to the invention is shown schematically, designated by the general reference 2. The tubular junction 2 comprises a first pipe 4, a second pipe 6 and a sealing gasket 8 inserted between the first pipe 4 and the second pipe 6 and sealing a gap remaining between the first and second pipes 4 and 6.

[0016] Subsequently, a pipe 10 according to the invention will be described which can form the first pipe 4 and / or the second pipe 6 of the tubular junction 2.

[0017] On the Figure 1 a sectional view of a first embodiment of the pipe 10 according to the invention is shown. Figure 2 shows a detail of this pipe 10.

[0018] The pipe 10 is generally of a shape of revolution around a central axis XX. In the following, the expressions "axially", "radially" and "circumferentially" will be used with respect to this central axis XX. The terms "external" and "internal" are also used with respect to this central axis XX. The term "thickness" is generally used in a radial direction or in a direction perpendicular to the surface of the object whose thickness is indicated.

[0019] The pipe 10 comprises a socket end 12 and a plain end 14.

[0020] The pipe 10 comprises a base body 16 which is composed of a support body or core 18 made of cast iron, in particular spheroidal graphite cast iron, and an anti-corrosion base layer 20.

[0021] Alternatively, the support body 18 is made of a material or metal or alloy other than cast iron.

[0022] The anti-corrosion base layer 20 is for example a zinc-based (Zn) metal layer, in particular made of a zinc and aluminum alloy, possibly enriched with copper. Alternatively, the anti-corrosion base layer 20 is made of another material or a metal or an alloy other than a zinc-based metal or alloy. The base layer 20 is for example a porous layer and has for example a surface density of 400g / m2. It is obtained by projection onto the outer surface of the support body 18.

[0023] Alternatively, the base body 16 is made of a single material, for example cast iron, without an anti-corrosion base layer 20.

[0024] The basic body 16 has a shape of revolution around the central axis XX.

[0025] The base body 16 comprises a substantially cylindrical barrel 22 having an inner barrel surface 24, an outer barrel surface 26, a first axial barrel end 28 and a second axial barrel end 30. The second axial barrel end 30 forms a front surface 32 of the barrel.

[0026] The plain end 14 is defined by the second axial end 30 of the barrel.

[0027] The base body 16 has a fitting portion 40 having an inner fitting surface 42, an outer fitting surface 44 and a front fitting surface 46. The fitting end 12 is defined by this fitting portion 40. The fitting portion 40 is arranged on the side of the first axial barrel end 28 and is connected to this axial barrel end 28.

[0028] The nesting portion 40 comprises a nesting groove 50, a bottom groove 52 and a nesting bottom 54. The bottom groove 52 and the nesting groove 50 are separated by an intermediate rib 56. The first axial end of the barrel 28 coincides with the nesting bottom 54.

[0029] The interlocking portion 40 may be provided with an external interlocking collar 58.

[0030] The pipe 10 is provided with a protective fitting coating 60 extending over the inner fitting surface 42. The fitting coating 60 extends over the front fitting surface 46 and over a portion of the outer fitting surface 44 so as to protect these surfaces against corrosion and against damage that may result from impacts during transport, storage or installation of the pipe, more particularly at the edges of the pipe which are more exposed to impacts and to the corrosion phenomena that may result therefrom.

[0031] The interlocking coating 60 is for example made of synthetic material, in particular thermoplastic material and more particularly PP (polypropylene), PE (polyethylene), amorphous PET (polyethylene terephthalate) or based on a PE / acrylic copolymer.

[0032] Preferably, the thickness of the interlocking coating 60 is identical over its entire extent, and in particular over the entire extent of the inner interlocking surface 42. The thickness of the interlocking coating 60 is preferably also identical on the front interlocking surface 46 and on the part of the outer interlocking surface 44.

[0033] In this case, the anti-corrosion base layer 20 forms the outer barrel surface 26 and the outer nesting surface 44.

[0034] The pipe 10 includes a protective spigot coating 64 extending over a portion of the outer barrel surface 26 and the barrel front surface 32 at the spigot end, thereby protecting these surfaces from corrosion and from damage that may result from impacts at these locations during transportation, storage, or installation of the pipe. The spigot coating 64 thus extends over the anti-corrosion base layer 20. Advantageously, the axial extent RBU of the spigot covering 64 on the outer surface of the barrel 26, measured from the front surface 32, is at least equal to the axial extent of the bottom groove 52 or alternatively of the socket end 40. Thus, when the spigot 14 is fully inserted into the socket end 12 of a pipe of the same type, the spigot covering 64 protects the outer surface of the barrel 22 located behind the seal from any contact with aggressive water potentially transported by the pipes.

[0035] In a variant not shown, the extension of the plain end coating 64 on the outer surface of the barrel may be limited to the chamfered or beveled end of the plain end, in particular when the pipes transport drinking water.

[0036] Advantageously, the plain end covering 64 is made of the same material as the socket covering 60.

[0037] The spigot covering 64 extends over the inner barrel surface 24, from the second axial barrel end 30 over an axial distance of between 2 mm and 10 mm. The spigot covering 64 preferably completely surrounds the second axial barrel end 30 and thus extends from the inner barrel surface 24 to the outer barrel surface 26.

[0038] The plain end coating 64 extends over a portion of the inner surface of the barrel 24 and is therefore covered with the cement mortar coating 80 (see below).

[0039] Preferably, the socket coating 60 and / or the plain end coating 64 is made of a material suitable for contact with water intended for human consumption. Thus, the pipe is usable for the transport of drinking water.]

[0040] Preferably, the socket coating 60 and / or the spigot coating 64 is a PE / acrylic copolymer-based coating powder-coated on the inner surface, the front surface and the outer rim of the socket end, as well as on the outer surface, the chamfer and the inner rim of the spigot.

[0041] Alternatively, the socket coating 60 and / or the plain end coating 64 is made of an anti-corrosion metal or alloy, in particular based on zinc (Zn), covered with a pore-sealing paint.

[0042] The pipe 10 is provided with a cover layer 66 disposed at least on the base layer 20. In this case, the cover layer 66 extends over the base layer 20, and is therefore in contact with it at the locations which are not covered by the spigot covering 64 and which are not covered by the socket covering 60.

[0043] The cover layer 66 also extends over the socket liner 60 which covers the outer socket surface 44, as well as over all or part of the spigot liner 64 which covers the outer barrel surface 26, for example over a covering portion 70 (shown in the Figure 6 for readability).

[0044] The cover layer 66 is for example a porous layer capable of blocking the pores of the base layer 20 and arranged on the base layer 20 as well as on the parts of the plain end coating 64 and the interlocking coating 60 as described above. The cover layer 66 is preferably based on a single-component water-based paint, such as those described in document WO2014 / 001544 (EP 2867382), in particular when the anti-corrosion base layer 20 is a zinc-based metal alloy.

[0045] Preferably, the covering layer is a single-component water-based paint based on at least one emulsified synthetic resin, dispersed or dissolved in water. The synthetic resin is preferably formulated from at least one polymer or at least one copolymer taken from the list consisting of acrylic polymers or copolymers, acrylic styrene, vinyl halides such as vinyl chloride, vinyl chloride acrylate, vinylidene halides such as vinylidene chloride, vinyl, methacrylic, polyvinyl acetate, and mixtures thereof.

[0046] Preferably, the single-component paint is an aqueous paint of a resin based on an acrylic-PVDC (Polyvinylidene chloride) copolymer in emulsion in water.

[0047] The interlocking coating 60 extends from the interlocking front surface 46 onto the anti-corrosion base layer 20 over a covering portion 72, shown in FIG. Figure 6 for greater readability. The cover layer 66 extends over the interlocking coating 60 arranged on this covering part 72 and preferably up to the interlocking front surface 46.

[0048] Preferably, the outer surface of the pipe 10 is constituted by the spigot coating 64 and the cover layer 66, as well as, if applicable, by the socket coating 60.

[0049] The pipe 10 is provided with a cement mortar coating 80 disposed on the inner surface of the barrel 24 and having a radial coating thickness ER. The cement mortar coating 80 is for example based on blast furnace slag cement, fillers (sand) and water. Over its entire axial length, the cement mortar coating 80 has an essentially cylindrical inner cement mortar surface 82 of axis XX. The cement mortar coating 80 is obtained by centrifugation.

[0050] The pipe 10 comprises a first annular barrier 84 adapted to oppose an axial flow or displacement of the cement mortar in the non-solid state, that is to say in a liquid, semi-liquid or pasty state during the manufacture of the cement mortar coating by centrifugation.

[0051] The first barrier 84 is disposed at the first axial end of the shaft 28 and defines the space of the cement mortar coating 80 on the interlocking end side. The first barrier 84 has an annular inner surface which has an inner diameter identical or essentially identical to the diameter of the cement mortar inner surface 82. The first barrier 84 thus defines the radial thickness ER of the cement mortar coating 80.

[0052] Advantageously, the first barrier 84 is in contact with the interlocking coating 60.

[0053] In the embodiment of the pipe 10 of the Figures 1 And 2, the first barrier 84 is axially located in the barrel 22. In other words, the first barrier 84 axially overlaps or covers the barrel 22.

[0054] The first barrier 84 has, for example, an axial extent of between 2 mm and 20 mm. The first barrier 84 has, for example, a rectangular radial section, possibly with rounded or skewed corners.

[0055] The interlocking covering 60 is connected to the first barrier 84. Preferably, the interlocking covering 60 is integral with or made of the same material as the first barrier 84. The interlocking covering 60 is fixed, in particular permanently, to the first barrier 84.

[0056] Thanks to the connection between the interlocking coating 60 and the first barrier 84, the interface between the cement mortar coating 80 and the interlocking coating is watertight and the risk of corrosion initiation is low.

[0057] The first barrier 84 is advantageously made of a material identical to that of the interlocking coating 60, in particular of thermoplastic material, and more particularly of PP (polypropylene), PE (polyethylene), amorphous PET (polyethylene terephthalate) or based on a PE / acrylic copolymer.

[0058] The first barrier 84 may be made of a material different from the material of the interlocking coating 60.

[0059] The pipe 10 may comprise a second annular barrier, not shown in the figures and adapted to oppose axial flow or displacement of the cement mortar in the non-solid state, i.e. in a liquid, semi-liquid or pasty state during the manufacture of the cement mortar coating by centrifugation. The second barrier is disposed at the second axial end of the barrel 30 and delimits the space of the cement mortar coating 80 on the spigot side. The second barrier has an annular inner surface which has an inner diameter identical or essentially identical to the diameter of the cement mortar inner surface 82, thus defining the radial thickness ER of the cement mortar coating 80.

[0060] The second barrier is for example arranged axially in the barrel 22. Advantageously, the second barrier is in contact with the plain end covering 64, the latter being connected to the second barrier. Preferably, the plain end covering 64 is integral with or is made of the same material as the second barrier.

[0061] The second barrier may be of a material different from the material of the spigot cover 64.

[0062] In case the pipe has a second barrier, it can be fixed to the coating 64 of the Figure 6 or have come from the same material as the coating 64 of the Figure 6 and would extend at the axial end of the cement mortar coating 80 on the plain end side. With regard to the second embodiment of the pipe, on the Fig. 4 the second barrier would, for example, rest against the portion of coating 64 folded down onto the inner surface of the barrel.

[0063] The second barrier is advantageously made of a material identical to that of the plain end coating 64, in particular of thermoplastic material and more particularly of PP (polypropylene), PE (polyethylene), amorphous PET (polyethylene terephthalate) or based on a PE / acrylic copolymer.

[0064] Advantageously, the first barrier 84 and / or the second barrier is made of a material suitable for contact with water intended for human consumption, thus making the pipe usable for transporting drinking water.

[0065] Preferably the first barrier 84 and / or the second barrier are based on a PE / acrylic copolymer and are made in one piece respectively with the protective interlocking coating 60 and with the protective spigot coating 64.

[0066] On the figure 3 a detail of a variant of the pipe of the Figure 1 The pipe 10 does not have a fitting collar 58.

[0067] The interlocking end of the pipe 10 further comprises a locking groove 130 having an inner surface serving as a support for a locking member not shown. This locking surface narrows towards the front interlocking surface 46.

[0068] On the figures 4 And 5 a second embodiment of a pipe according to the invention is shown.

[0069] This pipe differs from the one previously described only in the following. Similar elements have the same references.

[0070] The first annular barrier 84 is disposed at the first axial end of the barrel 28 and is advantageously disposed inside the barrel 22. In this case, the first barrier is disposed on a portion of the interlocking coating 60 extending over the inner surface 24 of the barrel. The first barrier 84 is in contact with the interlocking coating 60 but is neither integral nor integral with it. In addition, as for the embodiment previously described, the first barrier 84 remains in place in the barrel 22 after the cement mortar coating has been put in place.

[0071] Alternatively, and in a manner not shown, the first barrier 84 is arranged in the bottom groove 52 of the socket, in contact with the front surface of the first axial end of the barrel 28 and with the socket coating 60. In this case, the socket coating 60 extends to the first axial end of the barrel 28. This alternative is similar to the embodiment of the Figure 7 , but does not include a skirt 92 (see below).

[0072] As with the first embodiment, the pipe 10 may comprise a second barrier disposed at the second axial end of the shaft 30. This second barrier is preferably in contact with the plain end coating 64 but is neither integral nor integral with it. The second barrier again remains in place after the cement mortar coating has been placed.

[0073] The first barrier 84 and / or the second barrier of the Figures 4 And 5is for example made of synthetic material, in particular of elastomeric material such as for example an EPDM (ethylene - propylene - diene) copolymer, or of a thermoplastic material such as PP (polypropylene), PE (polyethylene), amorphous PET (polyethylene terephthalate), or a PE / acrylic copolymer. Preferably the first barrier 84 and / or the second barrier are based on a PE / acrylic copolymer.

[0074] Preferably, the first barrier 84 and / or the second barrier is made of a material suitable for contact with water intended for human consumption, thus making the pipe usable for transporting drinking water.

[0075] Alternatively, the first barrier 84 and / or the second barrier is made of an anti-corrosion metal or alloy, in particular based on zinc (Zn).

[0076] Alternatively, the first barrier 84 and / or the second barrier is made of a hot melt adhesive or steel.

[0077] On the Figures 6 And 7 A third embodiment of a pipe according to the invention is shown. This pipe differs from the previously described embodiment only in the following, the similar elements bearing the same references.

[0078] The pipe 10 comprises a protective member 90 for the bottom of the fitting 54. This protective member 90 is similar to the protective member 26 described in the document WO2014 / 79974 with reference to the Figures 3 And 4 . Therefore, express reference is made to the characteristics of this protective organ 26 of WO2014 / 79974 and they are incorporated by reference into this text.

[0079] The protective member is provided with a skirt 92, in particular having a thickness e, which is substantially constant over the entire axial extent of the skirt 92. The thickness e is measured perpendicular to the surfaces of the skirt 92.

[0080] The protective member 90 comprises a bottom axial stop 94 which is formed by a stop rib 96 bearing against the socket bottom 54. The bottom axial stop 94 is adapted to come into contact with a plain end, which is a plain end identical or similar to the plain end 14 of the pipe 10, inserted into the socket end and to limit the travel of this plain end relative to the socket end.

[0081] The first barrier 84 is located axially in the nesting part 40 of the base body ( Figures 6 And 7 ). The first barrier 84 is formed by the stop rib 96 and therefore by the protective member 90. The first barrier 84 is in contact with the interlocking coating 60 but is neither integral nor integral with it. In addition, as with the previous embodiments, the first barrier 84 remains in place in the barrel 22 after the cement mortar coating has been put in place.

[0082] The abutment rib 96 extends radially inward and defines a cylindrical free inner surface with a circular cross-section. This free inner surface is flush with the inner surface 82 of the cement mortar coating.

[0083] The pipe 10 according to the invention is manufactured by implementing the following steps: First, the base body 16 is provided. Then, the socket coating 60 and the spigot coating 64 are applied.

[0084] Then, the first barrier 84 is applied to the base body 16.

[0085] This application step is carried out, for example, by depositing the necessary quantity of synthetic material by extrusion at the entrance to the barrel or by any other suitable method to give the first barrier the desired final ring shape. If necessary, the second barrier is applied to the base body, for example by extrusion or by any other suitable shaping method. Then, the cement mortar in the non-solid state is applied to the inner surface 24 of the barrel of the base body 16, while the base body is rotated about the central axis XX. The quantity of cement mortar deposited corresponds to the volume necessary for the inner surface of the cement mortar coating 80 to be flush with the inner surface of the first and / or second barrier. Then the applied cement mortar is allowed to solidify, obtaining the cement mortar coating 80. The cover layer 66 is then applied to the pipe 10. Finally, the resulting pipe 10 is used to form a tubular junction 2, the first barrier and / or the second barrier being fixed and remaining fixed to the base body and to the cement mortar coating 80 in the tubular junction 2.

[0086] Alternatively, according to a variant not shown, the interlocking coating 60 is made of anti-corrosion metal coated with a layer of a synthetic material forming a pore sealant.

[0087] Alternatively, according to a variant not shown, the plain end coating 64 is made of anti-corrosion metal coated with a layer of a synthetic material forming a pore filler.

[0088] The pipe 10 according to the invention makes it possible to obtain a specific layer of cement mortar whose inner surface is flush with the inner surface of the barriers, thus ensuring the continuity of the flow of the fluid circulating in the assembled pipes.

Claims

1. A pipe of the type comprising a base body (16), having a central axis (X-X) and forming a cylindrical shaft (22), the shaft having an inner shaft surface (24), an outer shaft surface (26), a first axial end (28) and a second axial end (30), the second axial end (30) of the shaft forming a front shaft surface (32), the pipe comprising - a cement mortar coating (80) disposed on the inner shaft surface and having a radial coating thickness (ER), and - a bell end (12) and a spigot end (14), - the spigot end being defined by the second axial end of the shaft, characterized in that either the base body (16) made of a single material, without anti-corrosion base layer, or the base body (16) comprises a support body (18) made of cast iron and an anti-corrosion base layer (20) and the anti-corrosion base layer (20) forms the outer shaft surface (26) and the outer bell surface (44), and in that the bell end is defined by a bell part (40) of the base body which comprises an inner bell surface (42), in that the bell part (40) of the base body has an outer bell surface (44) and a front bell surface (46), in that the bell part is disposed on the side of the first axial end (28) of the shaft and connected to this axial end, in that the pipe comprises a bell coating (60), extending over the inner bell surface, and in that the bell coating (60) extends over the front bell surface (46) and the outer bell surface (44).

2. The pipe according to claim 1, wherein the pipe comprises - a first annular barrier (84) disposed at the first axial end (28) of the shaft and adapted to oppose axial flow of the cement mortar in a non-solid state, and wherein - the bell coating (60) is connected to the first barrier.

3. The pipe according to claim 1 or 2, wherein the pipe (10) comprises an annular second barrier adapted to oppose axial flow of the cement mortar in a non-solid state and wherein the second barrier is disposed at the second axial end (30) of the shaft.

4. The pipe according to at least claim 2, wherein the first barrier (84) is made of an anti-corrosion metal, in particular based on Zinc (Zn), and wherein preferably the first barrier (84) is made of a food safe material.

5. The pipe according to claim 3 and 4 taken together, wherein the second barrier is - made of synthetic material, in particular of elastomeric material and in particular of EPDM (ethylene-propylene-diene) copolymer or of a thermoplastic material, in particular of PP (polypropylene), of PE (polyethylene), of amorphous PET (polyethylene terephthalate) or of PE / acrylic copolymer, or - made of an anti-corrosion metal, in particular based on zinc (Zn), or - made of a hot-melt adhesive, or - made of steel, and wherein preferably the second barrier is made of a food safe material.

6. The pipe according to at least claim 2, wherein the first barrier is located axially within the bell part of the base body or wherein the first barrier is located axially within the shaft.

7. The pipe according to at least claim 2, wherein the bell coating is made in one piece with the first barrier or wherein the first barrier is disposed on the bell coating.

8. The pipe according to at least claim 2, wherein the bell part (40) comprises a bell bottom (54), wherein the pipe comprises a protective member (90) of the bell bottom and wherein the first barrier is formed by the protective member.

9. The pipe according to any one of the preceding claims, wherein the pipe comprises a spigot coating (64) extending over the shaft outer surface (26) and over the shaft front surface (32) at the spigot end.

10. The pipe according to claims 3 and 9 taken together, wherein the spigot coating is connected to the second barrier, in particular the spigot coating is made in one piece with the second barrier or the second barrier is disposed over the spigot coating (64).

11. The pipe according to claim 9 or 10, wherein the spigot coating is made from a PE / acrylic copolymer.

12. The pipe according to any one of the preceding claims, wherein the pipe is taken in the branch in which the base body comprises the support body (18) and the anti-corrosion base layer (20), in particular wherein the anti-corrosion base layer (20) contains zinc (Zn) and is preferably formed from an alloy of zinc (Zn), aluminum (Al) and copper (Cu), and wherein the pipe (10) comprises a cover layer (66) arranged at least on the anti-corrosion base layer (20), the bell coating (60) optionally extending over the anti-corrosion base layer (20) over a covering portion (72) and the cover layer (66) extending over the bell coating arranged on this covering portion (72).

13. The pipe according to claim 12, wherein the spigot coating (64) extends over the anti-corrosion base layer (20).

14. The pipe according to any one of the preceding claims, wherein the bell coating (60) is made of an anti-corrosion metal or alloy, covered by a pore-closing paint, in particular wherein the anti-corrosion alloy of the bell coating (60) is based on Zinc.

15. The pipe according to any one of the preceding claims, wherein the bell coating (60) extends over a part of the inner shaft surface (24) and wherein the portion of the bell coating (60) which extends over a part of the inner shaft surface (24) is covered by cement mortar.

16. A tubular joint (2) comprising a first pipe (4) and a second pipe (6), wherein the first pipe and the second pipe are connected to each other in a watertight manner and wherein at least one of the two pipes is a pipe according to any of claims 1 to 15.

17. A method for manufacturing a pipe according to any one of claims 1 to 15, comprising the following successive steps: - providing the base body (16), - applying the bell coating (60) and the spigot coating (64) to the base body (16), - where applicable, applying the first barrier (84) to the base body (16), - where applicable, applying the second barrier to the base body, - applying the cement mortar in a non-solid state to the inner surface of the shaft, - solidifying the cement mortar to obtain the cement mortar coating (80) and - applying the cover layer (66).