Abstract: This the method of manufacturing metal pipes by inserting tin or tin based coating material into the metal pipe, raising the temperature rapidly to over 1000.degree. C. in the high frequency furnace in a non-active, or non-oxide atmospheric gas, or in a reducing gas, to coat the entire interior wall of the metal pipe with tin or tin based alloy, and, then, to cool it at a high rate of cooling.According to this method of manufacturing, a uniform coating is formed in the interior wall of the metal pipe, without giving rise to residuous collection of the coating material, or to the non-formation of coating, and such effects as the prevention of metal corrosion as well as the absence of the weakening of the mechanical strength as vibration resistance and also of pressure resistance may be obtained.

Abstract: The present invention refers to a process for the preparation of a scale inhibiting solution that consists of: a) a low molecular weight compound belonging to the families of the polyhydroxybenzyls, polyhydroxyarylethers, its copolymers or blends b) an alkali and c) a strong electrolyte, which is used to coat the internal surfaces of polymerization reactors. This scale inhibiting solution reduces effectively the adherence of polymeric material to the inner parts of the reaction vessel when monomers such as vinylics, vinylidenes, acrylics, methacrylics, vinylaromatics, diolefins and their mixtures are polymerized via suspension, microsuspension, dispersion or emulsion.

Abstract: A food-safe composition for the pretreatment of a surface, preferably an oven or a broiler, which may be subjected to heat is liable to soiling by organic food deposits, especially baked-on food deposits.

Abstract: A method for treating well tubulars and elements (e.g. tubing, casing, sucker rods, etc.) for corrosion, drag reduction, or the like wherein a mass of gelatin is passed downward through the tubular to deposit a protective layer onto the wall of the tubular and/or element. Preferably, the mass of gelatin contains a treating solution therein which forms part of the protective layer. Since such treating solutions can severely damage the production and/or injection formation, the mass is stopped before it completely travels through the tubular and circulation is reversed to return any remaining mass of gelatin and solution back up the tubular towards the surface.

Abstract: The invention is a process for modifying pore size near the surface of porous materials. The surface is contacted with an alcohol solution of a metal alkoxide which forms a hydrous oxide insoluble in water, an amount of water insufficient to hydrolyze fully the metal alkoxide, and a mineral acid for a time sufficient for the solution to penetrate the surface region but not the bulk. This is followed by exposing to sufficient moisture to complete hydrolysis and then curing to stabilize the metal oxide in the pores near the surface.

Abstract: A pumpable sealant composition comprises of (A) ethylene/propylene nonconjugated polyene terpolymer having a number average molecular weight of between about 4,000 and about 15,000; (B) ethylene/propylene copolymer having a number average molecular weight of between about 500 and about 5,000; (C) an effective amount of curative; (D) (optionally) filler; and (E) (optionally) a blowing agent; which composition possesses a Brookfield viscosity of between about 100,000 and about 5,000,000 centipoise at shear rates of 5 reciprocal seconds or greater at 22.degree. C. Also disclosed is a method of protecting a substrate employing such composition.

Abstract: A metal bat for use in baseball is disclosed which includes a tubular metal body having an impact portion for hitting a ball, and a layer of a resin foam provided on and bonded to the inside wall of the impact portion and having a density of 0.05-0.5 g/cm.sup.3.

Abstract: Liquefied resin is supplied into a pipeline having a branch pipe from an end. Mass of the resin is moved by compressed air passing through the pipeline at constant speed, thereby lining inner walls of the pipeline and branch pipe with the resin.

Abstract: This invention is an apparatus and method for applying sealant to a countersunk fastener hole. The apparatus comprises a sleeve, an adapter tube within the sleeve, a nozzle housing attached to the adapter tube, and a tip within the nozzle housing. A guide pin is attached to the adapter tube and follows an oblique slot in the sleeve. To operate, the sealant applicator is inserted into a countersunk fastener hole, engaging the tip with the countersink of the hole. The tip depresses into the nozzle housing, ejecting sealant onto the countersink. The adapter tube is pushed into the sleeve, moving the guide pin along the oblique slot in the sleeve. This guide pin movement rotates the adapter tube, nozzle housing and tip, causing the tip to uniformly spread the sealant around the countersink.

Abstract: This invention relates to a method for manufacturing a vessel for storing radioactive waste, and to a method for manufacturing a vessel which withstands the heat generated by the radioactive waste without deforming and a method for manufacturing the vessel. A method for manufacturing a stainless steel vessel for radioactive waste according to the present invention comprises eliminating impurities on the surface of the stainless steel, stirring copper plating solution while filling the vessel therewith in order to keep the solution at a constant temperature, thereby precipitating the copper and plating the surface of the stainless steel vessel, and then filling the vessel with lead.

Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.

Abstract: A process for producing a ceramic honeycomb extrusion die including at least ceramic material feed holes and forming channels. The process includes the steps of preparing a ceramic honeycomb extrusion die base body having a given size by machining, detecting differences in extruding speeds of a ceramic material extruded through the forming channels, sealing of openings of the ceramic material feed holes corresponding to the forming channels having greater extruding speeds of the ceramic material based on the detected differences, feeding the ceramic material through the ceramic material feed holes corresponding to the forming channels having smaller extruding speeds of the ceramic material, and repeating the preceding steps number of times necessary for adjusting and substantially making uniform flow resistance of all ceramic material flow paths of the entire die. The ceramic material flow paths are constituted by the ceramic material feed holes and the forming channels.

Abstract: Method for pretreating the connecting elements of a gas-tight pipe connection of the type including an internally threaded coupling for being screwed to externally threaded spigots at pipe ends to be joined, a metallic sealing seat, and an abutment shoulder. Only the coupling, on its innerside, is provided with a covering while leaving the spigots bare. After cleaning threaded and sealing regions of the connecting elements but before screwing together such connecting elements, a lubricant is applied to the cleaned threaded and sealing regions.

Abstract: A process for converting a fluid system of a machine from an oil based fluid system to a water based fluid system. A solvent and perfluoroethylene resin are added to the fluid system in sufficient amounts to remove extraneous matter from and coat the surfaces within the fluid system with the perfluoroethylene resin. The oil based fluid, solvent and perfluoroethylene resin are circulated throughout the fluid system for a time sufficient to remove extraneous matter and coat the surfaces. The fluid system is evacuated of the oil based fluid, solvent and residual perfluoroethylene resin, and a water based fluid is added to the fluid system.

Abstract: Polymerization of methacrylate and acrylate monomers on surfaces such as in vents is inhibited by coatings of water-base paint containing phenothiazine.

Abstract: A method for preserving cavity spaces, particularly in an automobile chassis, is provided wherein wax is applied onto the inside walls of the cavity space to be preserved, being applied with application nozzles. The wax is heated and the heated and liquified wax is supplied under pressure to a pre-atomizer nozzle and is atomized by the latter. At the same time, compressed air is heated and is mixed in its heated condition to the jet of wax drops emerging from the pre-atomizer nozzle and relaxed. Finally, the hot mixture of wax drops and air is supplied to the application nozzle and the latter sprays it onto the walls of the cavity space to be preserved. An apparatus for the implementation of this method is composed of a heatable delivery line for the hot and liquified wax, of a pre-atomizer nozzle having a following discharge tube, of a compressed air delivery line having an air heater and of a nozzle tube having application nozzle apertures.

Abstract: The present invention is directed to a process for coating the interior surfaces of an orifice in a substrate that forms a slurry fuel injection nozzle. In a specific embodiment, the nozzle is part of a fuel injection system for metering a coal-water slurry into a large, medium-speed, multi-cylinder diesel engine. In order to retard erosion of the orifice, the substrate is placed in a chemical vapor deposition (CVD) reaction chamber. A reaction gas is passed into the chamber at a gas temperature below its reaction temperature and is directed through the orifice in the substrate. The gas reaction temperature is a temperature at and above which the reaction gas deposits as a coating, and the reaction gas is of a composition whereby improved resistance toerosion by flow of the particulates in the slurry fuel is imparted by the deposited coating.

Abstract: Plant for treating water from a first pipe to protect the internal walls of a pipework, including a storage tank (R) for powdered lime, a loop (2) for bleeding water from the first pipe (1), a lime saturator (S) located on the loop (2), and structure (3, 4, 5) for adding powdered lime from the storage tank (R) into the saturator (S). The loop (2) includes, upstream of the saturator (S), relative to the direction of water flow, a decarbonator (D) fed with water which is to be treated. A second pipe (6, 2) which connects the outlet of the saturator (S) with the first pipe (1) includes a loop (7) for recycling a part of the material from the saturator (S) to the decarbonator (D). The structure for adding powdered lime includes a pipe (5) which receives the powdered lime and which connects the outlet of the decarbonator (D) with the inlet of the saturator (S).

Abstract: A method of cleaning and coating water conducting pipes is provided wherein a mixture of water and compressed air is forced through the emptied pipe system to rough clean such system, a pressurized acid is introduced into the pipe system and allowed to react with the interior surface of the pipes for a predetermined period of time. The acid is then drained from the pipes, and the interior of the pipes is dried by compressed air. A pressurized liquid plastic is then introduced into the pipes to coat the pipes with the excess plastic being subsequently drained from the pipe system.

Abstract: An improved method of diffusion coating a workpiece, such as ferritic tubing employing a ceramic carrier provided with a diffusion composition. The diffusion composition includes a diffusion element such as chromium, silicon, aluminum, and boron. The carrier is subjected to an elevated diffusion temperature in a controlled environment to diffusion coat either the external or internal surface of the workpiece.

Abstract: A method is provided for reducing the force required to move a pipe through a J-tube attached to an offshore platform by coating the pipe with hydrophilic polymer and then moving the pipe through the J-tube, or by introducing a solution of hydrophilic polymer and water into the J-tube and then moving the pipe through the J-tube.

Abstract: A process for forming a low smoke, low erosion rocket motor insulation comprising mixing organic fiber selected from the group polyaramid and polybenzimidazole; an inorganic powder filler; a vulcanizable hydrocarbon elastomer and a non-fluorinated phosphazene polymer of the formula ##STR1## where Q and Q' are the same or different and are substituted or unsubstituted alkoxy or aryloxy and Q" is a group having olefinic unsaturation.

Abstract: A system for pipe lining including a forward seal and a following spreader defining a chamber therebetween for receiving flowable lining material. The spreader is immediately followed by a cylindrical elongate platen formed of radiant-energy transparent material. A radiant energy source is mounted in the platen for transmission of radiant energy through the platen and into the lining material simultaneously with the forming of the lining material into position by the platen as the apparatus moves along the interior of the pipe.

Abstract: An acid soluble mercury metal salt intensifier is provided to inhibit corrosion in conjunction with a corrosion inhibitor when a steel surface is present in an acid environment. The mercury metal salt may be a mercuric halide, such as mercuric chloride or may be a mercuric acetate, mercuric oxide, mercuric nitrate or mixtures of all of these. An acid soluble copper metal salt, such as cuprous halide, for example, cuprous chloride, copper acetate, cupric formate, cuprous nitrate and mixtures thereof, may also be present as a co-intensifier. In one application, the mercuric salt intensifier is used in a fluid for treatment of a subterranean well for the acid enhancement of production within the well by introduction of the fluid through a high alloy steel conduit positioned within the well. Methods of inhibiting acidic corrosion when steel surfaces are in an acid environment, particularly steel surfaces containing chrome, and methods of treating a subterranean well for enhanced production are also presented.

Abstract: A method and apparatus for spraying a solid particulate powder onto the interior surface of tubular articles by intermittently pumping the powder from a fluidized bed of powder through a powder supply line containing an intermittently operated venturi pump and air amplifier, as well as a pair of constantly operated air diffusers and an electrostatic charging apparatus. A powder collection shroud adjacent at least one open end of the tubular article has a carefully regulated vacuum applied thereto in order to collect oversprayed powders.

Abstract: According to the present invention, a coat is formed by applying a coating composition comprising an epoxy resin obtained by a bisphenol represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 represent a hydrogen atom or an alkyl group containing from 1 to 3 carbon atoms and a curing agent, to a substrate; and thereafter contactings the resulting coat with a liquid such as warm water or hot water in a one stage or multistage process. The thus formed coat is excellent in properties such as heat resistance, particularly erosion resistance adhesive properties and resistance to leaching of organic constituents contained in the coat exposed to hot water.

Abstract: Method of producing a niobium component having passageways therein, including providing a refractory metal niobium alloy member having slots formed within its outer surface portions, inserting a paste of powdered vanadium into the slots, sintering the powdered vanadium paste, depositing a layer of niobium over the vanadium in the slots and over the outer surface portions of the member by chemical vapor deposition, and removing the vanadium from the slots by acid leaching to produce the niobium component.

Abstract: An inhibitor formulation including the product obtained by reacting maleic anhydride or fumaric acid with fatty acids containing unsaturation in the presence of a suitable catalyst, such as iodine, clay, or silica, is disclosed to provide improved corrosion inhibition in oil field equipment and piping over conventional dimer/trimier based inhibitor formulations.

Abstract: The coating for the metallurgical vessel (1) comprises a permanent refractory lining (2) and a refractory wearing layer (4) which is constituted by an aqueous slurry containing inorganic particles and a binder. The coating further comprises a waterproof layer (5) between the refractory lining (2) and the wearing layer (4). The coating serves to prevent water derived from the wearing layer from penetrating into the permanent lining.

Abstract: This invention relates to methods and compositions of matter for inhibiting and/or preventing the formulation of adhesion of materials such as coal, coke, mineral ores, taconite, glass and others to the container (railcars, silo, hopper bins, etc.) walls due to freezing temperatures in winter and/or excessive moistures during the rest of the year.

Abstract: A silicocalcareous mass obtained from an aqueous paste with a base of natural silica and quicklime. The mass is at least doubly stabilized by two mineral suspending agents, and reinforced by a fibrous reinforcing agent. The suspending agent comprises cellulose fibers which may be partially chemically delignified, partially mechanically delignified, or delignified by a combination of chemical and mechanical processes, introduced in an amount of from about 3 to about 30% by weight of the solids. The porous silicocalcareous masses are used for lining containers for gas storage, particularly for containers for storing acetylene gas.

Abstract: Layers of electrically conductive material are deposited in a standing microwave field. The deposition is done on an electrically conductive substrate in which a part of the surface forms a part of the inner wall of a microwave cavity resonator. As a result of this the microwave energy is used optimally. Measures are taken to keep the coupling place of the microwave ("window") free from an electrically conductive growth. The substrate is preferably moved periodically or aperiodically relative to the plasma and the remaining walls of the resonator.

Abstract: An inner surface coating method for a piping having a step of causing an adhesive agent or a lining material to adhere to a curved portion of a pipe and sticking a reinforcing material transported by gas flowing inside the pipe at a constant flow speed of 1 to 120 m/sec to the adhesive agent or the lining material, and an inner surface coating device having a reinforcing material supplier using a reinforcing material, dispersion unit constituted by a closed primary dispersion tank for mixing the reinforcing material from a supply tank with gas supplied under pressure from a blower and by a closed secondary dispersion tank incorporating a dispersing rotary blade rotated by reinforcing material mixed gas supplied under pressure from the primary dispersion tank.

Abstract: A high performance ballistic grease is used in ammunition and a lubricating process to protect the barrel of a weapon from corrosion and overheating. The ballistic grease, ammunition, and process improve the structural integrity and accuracy of the weapon and are economical, nontoxic, effective, and safe. The preferred ballistic lubricating grease comprises a polyalphaolefin base oil, an amorphous silicon dioxide thickener, and a disodium octaborate tetrahydrate additive.

Abstract: Gas-pressure bottles are internally coated by plugging the mouth of the bottle and evacuating the bottle. The coating material is formed by striking repeatedly electric arcs between the electrode deposed within the bottle and the wall of the latter.

Abstract: A clutch plate wherein a flange surrounds a sleeve to form therewith a hub serving to support a carrier of friction linings, wherein the carrier can turn relative to the flange through a given angle determined by one or more rivets extendings into cutouts of the flange and connecting two washer-like elements of the carrier, and wherein the flange has windows for coil springs which further extend into registering windows of the washer-like elements. The splined internal surface of the sleeve and the surfaces surrounding the cutouts and windows of the flange are coated with nickel which is thereupon hardened. The remaining portions of the surfaces of the sleeve and flange are phosphatized.

Abstract: A corrosion resistant article comprising a refractory metal having a sulfide coating of said refractory metal formed thereon and a method for producing the same by forming on a refractory metal substrate a sulfide coating of said refractory metal. The corrosion resistant article may be provided in a composite comprising also a metal substrate.

Abstract: A method for the production of a composite pipe with at least the inner surface thereof covered with a plastic layer, comprising: forming a coiled metal sheet into a cylinder, during the conveyance of the metal sheet, by a cylindrical inner mold and at least one of a plurality of outer molds lined up in the direction of conveyance of the metal sheet, said outer mold having a housing composed of two separatable parts and being fitted around said inner mold with a fixed space; joining the side edges in the circumferential direction of said cylinder together; and extruding molten resin into a cylindrical shape over the inner surface of the cylinder from the inner mold, resulting in a composite pipe the inner surface of which is covered with a plastic layer.

Abstract: The difficulty of applying uniform plastic coatings to the interior of pipe and other tubular goods increases in proportion to the diameter and length of the pipe. Epoxy is one of the most satisfactory plastic coatings for use on oilfield pipe. An epoxy coating preferably is applied on powdered form to the heated, rotating pipe interior, where the plastic is fused into a continuous film and thereafter the pipe is cooled as the film solidifies to provide a superior coating which protects the metal pipe surface from chemically reacting with the material flowing therethrough, thereby elongating the life of the pipe.

Abstract: A method of inspecting the inner and/or outer circumferential surface of a tubular member includes the steps of moving an inspection apparatus along the tubular member and during movement along the member sequentially cleaning the inner and/or outer circumferential surface and optically scanning the entire 360.degree. of the inner and/or outer circumferential surface of the elongate member. The foregoing steps are performed in a single forward pass of the inspection apparatus along the tubular member and in a return pass the tubular member is applied with a corrosion preventing material which in the return pass is dried. An apparatus for performing the method is disclosed and the apparatus is capable of determining dimensional faults and inspecting for, inter alia, cavitation, reeding and scale inclusion.

Abstract: A spraying device is drawn through an underground pipe and sprays a thixotropic resin onto the inner walls of the pipe. The resin cures and hardens, to form an internal lining to the pipe. The resin has sufficient thixotropy to enable it to be applied in a single operation to a significant thickness, preferably in the range 2 to 25 mm. The lining which is formed upon curing therefore has significant structural strength. To allow such a resin to be pumped from the surface down to the spraying device, along a significant length of tubing, the resin is firstly heated, prior to being pumped.Also disclosed is a swab for swabbing a pipe immediately prior to the application of a lining therein.

Abstract: A method is provided of treating an air-contacted surface of an air conditioning system comprising the steps of:(A) introducing to the air passage and air-borne biocide in a biocidally effective amount; and(B) subsequently introducing into the air passage an air-borne biostat adapted to coat the surface with an air-driable, substantially water insoluble biostat coating, the biostat being introduced in an amount sufficient to coat the surface with a biostatically effective coating. According to another aspect of the invention, a kit is provided of interrelated parts for carrying out such treatment method.

Abstract: A novel composition comprising one part by weight of a viscosity-imparting agent and 0.1-100 parts by weight of water is disclosed. Usable viscosity-imparting agents are synthetic polymer resins, polyols and hydrophilic organic substances. The viscosity of the composition is, preferably, in the range of 5-20,000 poises. The composition is suitable as sealant for sliding contact sections, e.g. in an aerosol container using a propellant such as liquefied- or compressed gas.

Abstract: A process and apparatus for manufacturing self-locking fasteners in which a resin deposit of patch is applied to a portion of the threads. A resin stream entrained in a gaseous jet is directed through a nozzle which is an axial registration with the fastener. The nozzle has an end wall and an arcuate slot therein which directs application of the entrained resin to the threads of the fastener in a controlled manner.

Abstract: According to the method of coating the internal surface of a pipeline with a cement-sand mortar, a layer (4) of the mortar is formed on said surface and is pressed and held by a flexible hose (5). Before the flexible hose is pressed to the mortar layer (4) the flexible hose (5) is turned out and placed simultaneously with the formation of the mortar layer. The device effecting the method as claimed has a cement-sand fed system (11), a piston (3) arrnged in the pipeline (1) with an annular clearance (12) to distribute the mortar layer on the internal surface of the pipeline, a chamber (13) accommodating the flexible hose (5) and communicating therewith by a flowing medium feed system (15), said flowing medium serving as a means for feeding, turning out and pressing the flexible hose (5) to the mortar layer (4) formed on the surface of the pipeline.

Abstract: A process for producing a heat pipe including the steps of treating the inner surface of a steel container with an aqueous solution of a vanadate with heating, and enclosing in the container a working liquid prepared by adding an alkalinizing pH adjusting agent to pure water and having an adjusted pH of 8 to 12. When the container inner surface is treated with the aqueous vanadate solution with heating, a protective layer covering the inner surface is formed. The working liquid, when in the range of 8 to 12 in pH, maintains the protective layer in a stable state over a prolonged period of time.

Abstract: A method and an apparatus for interior coating of hollow bodies comprising a mandrel introducible into at least one tubular body, a coating arrangement on the mandrel for applying a coating medium to an interior of the tubular body and a heating mechanism on the mandrel and arranged so as to predominantly deliver heat directly from the mandrel into a surrounding area toward the tublular body. The heat-applying efficiency of burning in a coating medium can be improved by applying the heat from the interior at least predominantly directly to one of an interior area of the tubular body just before being coated and an interior area of the body already coated to burn in the coating according to the disclosed method.

Abstract: A process for production of a vinyl polymer by suspension polymerization or emulsion polymerization of at least one kind of vinyl monomer in an aqueous medium is disclosed.In this process, the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization having a surface roughness of not greater than 5 .mu.m and being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated .pi. bonds. According to this process, scaling on the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.

Abstract: The descaling of surface of processing equipment, vessels and piping on which scale, such as that which occurs in the extraction of alumina from bauxites has formed. The surface is cleaned to ensure that it is entirely free of contaminants and then is coated with a suitable resin such as an epoxy resin which is cross linked and thermosetting. The coating may be applied in two or more layers using the same or a different resin. The final layer may be one which readily detaches from the base coating when subjected to a high pressure fluid blast.

Abstract: A method of powder coating the inside of tubular goods, such as oil field pipe and the like, by connecting one end of the pipe to a means for producing a flow of compressible gases therethrough. The other end of the pipe is open to atmospheric pressure. A valve means is connected upstream of the pipe between the inlet end thereof and a container for holding a single charge of plastic powder. The charge of powdered plastic is isolated upstream of the pipe inlet. The charge is of sufficient size to coat the entire inside peripheral wall surface of the pipe with a substantial uniform coating of plastic.