Abstract: The invention relates to a product for the internal coating of a pipeline component (1), in particular a metal pipeline component, comprising an internal wall (4) of high curvature. This product comprises a solid charge and a liquid. The liquid is a solution of an alkali metal silicate and the solid charge comprises sand, between 20 and 30% by mass of a binder which sets chemically by reaction with the liquid, and between 4 and 10% by mass of plasticizing adjuvants. The solid charge and the liquid are intended to be mixed (in 5) with a liquid/binder ratio by mass of between approximately 0.3 and 0.45. Application to pipelines for discharge of waste water made of spheroidal graphite cast iron.

Abstract: The invention relates to a device for positioning a die block (5) of a casting table (1) of a continuous vertical ascendant casting machine for pipes (T) with respect to a vertical axis of extraction (X—X), the die block (5) of the machine being fed by means of a device (3) for the supply of liquid iron, and bearing thereon.

Abstract: A device 7 for the assembly of a straight spigot 1 and a flange 3 of two pipe elements 2, 4, containing an axial compression sealing elastomer gasket 8. The gasket has a support body 15 bearing against a counter flange 11 to apply pressure to the gasket. To the front of the body 15, and interdependent of it, is a support heel 16 for bearing against the flange. A radial exterior surface 22 of the body is designed to rest on a reaction surface 27, 27a of the counter flange, a radial interior surface 18 of the body is designed to rest on the radial exterior surface 20 of the straight spigot, and a forward surface 31 of the heel is designed to press against the flange to insure the waterproofness of the assembly. The body has at least one recess 26 for the expansion of the elastomer of the pressurized gasket, and the device is fitted with a ring 9 to limit the radial expansion of the heel toward the exterior.

Abstract: A plant for metallization of a metal pipe obtained by upward vertical continuous casting and displaced vertically in a continuous manner, includes, along the path of the pipe, a metallization station having a passage for the pipe, a metallization enclosure (6), spray guns (11) mounted inside the enclosure on an oscillating plate (10) surrounding the path, means for supplying each gun with metallization material (12), and a device for causing oscillation of the support plate and for displacing the guns inside the enclosure with an oscillating movement, the frequency and angular amplitude of which ensure the formation of a coating of uniform thickness.

Abstract: A sealing device for a casting table of a machine for the continuous vertical casting along a vertical extraction axis (X—X) of cast iron pipes (T) includes a die block (5) aligned with the vertical extraction axis and a device (3) for the supply of liquid iron. Two sealing gaskets (12A, 12B) are located between the outlet from the device supplying liquid iron and the entry to the die block. The sealing device has members (6, 15, 21) for tightening the die block against the outlet of the supply device, parallel to the vertical extraction axis, in order to tighten the sealing gaskets.

Abstract: A coupler (10) for pipes is designed for end-to-end assembly of pipe elements (2,4). It contains a waterproof tubular elastomer gasket (14), an exterior collar (12) which contains a collar that is cut longitudinally and at least partially covers the gasket, and means (16) for tightening the collar to bring together its extremities and to compress the waterproofing gasket. The means for tightening contains two matched flanges (18, 20) attached to each extremity of the collar, and means (22) for fastening the two flanges one to the other.

Abstract: A locked pipe joint between a socket (3) of a first pipe (4), and a smooth end (1) of a second pipe (2) inserted in the socket with the interposition of an annular sealing gasket (5). The joint includes a raised bead (6) integral with the smooth end, a split metal retaining ring (7), and a rear support surface (9) for the split ring. The split ring includes a series of indentations (19) on the circumference of at least one face (16), in which the indentations are configured to allow the necessary diametric contraction of the ring by the crossing of its ends, and the subsequent expansion of the ring to lock the joint.

Abstract: A ball-and-socket joint of the type where the male end (1) of a first pipe element (2) has a spherical saddle (5) designed to be inserted and pivot in a specially designed housing with a spherical profile (11) which is set on the Y--Y axis socket of a second pipe element (4). A waterproof elastomer ring gasket (16) is set in a ring groove (15) in the socket's (3) internal surface. The groove is designed and located in such a way that it forms an expansion chamber for the elastomer of the gasket during the insertion of the spherical saddle into the socket and insures, in a locked position, the pressing of the gasket on the outside surface of the saddle located beyond the maximum diameter of said saddle measured in a direction perpendicular to the axis Y--Y of the socket. The gasket is thus subjected to a residual radial compression that guarantees the waterproofness of the assembly and simultaneously prohibits the dislocation of the pipe elements.

Abstract: A mixing device (1) having at least two concentric tubular elements (2, 3) including an outer tubular element (2) and an inner tubular element (3) inside the outer tubular element, the outer tubular element and the inner tubular element each supplying a liquid (5) or solid products to be mixed together, and a helical member (4) disposed for rotational movement inside the outer tubular element for entrainment of the liquid (5) or solid products, the helical member surrounding the inner tubular element, the outer tubular element including at least one inlet orifice (6a) for introducing the liquid (5) or solid products into the outer tubular element to be entrained by the helical member, and an outlet orifice (7) for delivering a mixture (9) of the liquid and solid products (5, 8) outside the outer tubular element, the inner tubular element (3) having an open end terminating inside the outer tubular element (2) downstream of the inlet orifice (6a) and upstream of the outlet orifice (7), wherein the mixture (9) i

Abstract: A cast iron piping system element has an outer coating comprising a first, inner porous layer consisting of zinc/aluminum alloy containing from 5 to 60% of aluminum, and a second, outer pore occluding layer of an organic or mineral binder in an aqueous, solvent or powder phase with a thickness of 100-140 .mu.m.

Abstract: A locking insert 4 for joining the male and female ends of spheroidal-graphite cast-iron pipes conveying fluids under pressure has a generally planar shape, and includes at least two metal parts 4A, 4B fixed to each other by an electrically insulating junction layer 4C.

Abstract: A cast-iron pipework element adapted to be buried has an external coating made up of an inner layer of zinc, a porous intermediate layer of zinc/aluminium alloy containing from 5 to 55% of aluminium, and a porous outer layer, or pore-blocking layer, comprising an organic binder, especially a water-based paint, a bitumen varnish or an epoxy resin.

Abstract: A machine for the deburring of tubular parts made from cast iron, provides a carousel upon which a deburred part is unloaded and at least one part to be deburred is loaded. Between two deburring operations, the position of at least one active point of the grinding wheel is measured by a sensor, and, after having thus measured the position of a number of points, the trajectory of the grinding wheel corresponding to the grinding wheel profile, as defined by these points, is calculated. The grinding wheel is provided to be movable, based on its profile and trajectory.

Abstract: A multi-stage sand mold 4 defines a plurality of casting impressions or cavities 31 fed with molten metal from a tubular central chamber 28 via a pair of parallel intermediate ducts 30A, 30B extending horizontally outwardly from opposite sides of the chamber, and ingates 32A, 32B extending between the ducts and the impressions. All of the ingates fed by a single intermediate duct open into the same impression, thus implementing a balanced and uniform distribution of molten metal to the impressions.

Abstract: A socket joint for pressurized fluid carrying pipes incorporates a radially-compressed gasket 4 locked in position by toothed inserts 12 each having an inclined face 27 which slides on and bears against a similarly inclined face 26 of a support insert 11 embedded in the anchoring heel 14 of the gasket which is seated in the anchoring throat 7 of the socket.

Abstract: A multilayer pipe surface coating for water system elements requiring high corrosion resistance includes at least one conversion layer and one thermosetting synthetic resin layer.

Abstract: A locking device for a system of laid pipes comprises a gasket 2 and one or more assembled components which form a hollow cylinder 4 surrounding and accommodating the gasket, the hollow cylinder incorporating an anchoring groove 8. The gasket is elastic and has a solid body portion 9, an integral annular heel member 10, and a plurality of embedded anchoring inserts.

Abstract: A multi-stage sand mold 4 defines a plurality of casting impressions or cavities 31 fed with molten metal from a tubular central chamber 28 via intermediate ducts 30A, 30B extending horizontally outwardly from opposite sides of the chamber, and ingates 32A, 32B extending between the ducts and the impressions. At each stage the sum of the cross-sectional areas of the ducts at their inlets is substantially less than the cross-sectional area of the central chamber, and the sum of the cross-sectional areas of the ingates fed by a given duct is at least equal to its cross-sectional area. This results in delivery rate reductions at the entrances to the ducts and in pressure reductions at the entrances to the ingates, which enhances the uniformity and integrity of the castings.

Abstract: A method for the deburring of tubular parts made from cast iron, wherein, between two deburring operations, the position of at least one active point of the grinding wheel is measured, and, after having thus measured the position of a number of points, the trajectory of the grinding wheel corresponding to the grinding wheel profile, as defined by these points, is calculated.

Abstract: A socket joint for ductile cast iron pipes is locked by toothed locking ring inserts 15 and a counter-flange 11. At least one elastic lip 19 is inserted between the locking ring and the rear face of a rigid stop ring which encloses the smooth or male end of the pipe 1.