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WO/2024/071354A1 |
The purpose of the present invention is to provide a steel tube and a production method therefor, the steel tube being suitable for steel structures used in high pressure hydrogen gas environments, such as line pipes for 100% hydrogen ga...
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WO/2024/071352A1 |
The purpose of the present invention is to provide a steel pipe for a line pipe and a method of manufacturing the same, and a steel material for a line pipe and a method of manufacturing the same, the steel pipe for a line pipe being sui...
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WO/2022/223358A1 |
The invention relates to a method for producing a pressure vessel (10).
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WO/2021/033156A1 |
The present invention relates to a device (1) for guiding a movable element (6), in particular a driving bar (5) of a mandrel or a mandrel, in a rolling mill with mandrel. The device according to the invention comprises a support structu...
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WO/2020/189140A1 |
The objective of the present invention is to provide a method for manufacturing a seamless square steel tube with which it is possible to obtain a seamless square steel tube having a corner portion S value equivalent to those in the past...
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WO/2020/150715A1 |
A tubular structure is disclosed. The tubular structure has a first sheet metal having a machine direction. The first sheet metal is convolutely wound about a longitudinal axis and has a tail portion. The tail portion of the first sheet ...
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WO/2020/074620A1 |
The invention relates to a controller (2) and a method for controlling a stretch-reducing rolling mill (1) for rolling tubes (R), having multiple roll stands (10) arranged one behind the other in the conveyor direction (F) of the tubes (...
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WO/2020/038832A1 |
The invention relates to a method and to a control unit for controlling a stretch reducing rolling mill for rolling pipes, comprising a plurality of roll stands (7) arranged one behind the other in a conveying direction of a pipe (6) to ...
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WO/2020/015554A1 |
A composite forging and rolling metal tube forming machine, comprising: a feeding device, a composite forging and rolling forming device, and a transmission device connected in sequence. The composite forging and rolling forming device c...
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WO/2020/015556A1 |
A small-diameter thick-walled metal tube, wherein the cross-sectional diameter range of the metal tube is 30-160mm, the size precision is ±0.2mm, and the ratio between the outer diameter and the wall thickness of the metal tube is great...
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WO/2019/219463A1 |
A stretch-reducing mill (1) for producing seamless pipes (R), which comprises a plurality of roll stands (10), which are arranged one after the other in a conveying direction (F) of the pipes (R) and each have three rolls (11) arranged a...
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WO/2019/188224A1 |
The purpose of the present invention is to provide a high-strength hollow stabiliser and an electric-welded steel tube for producing a high-strength hollow stabiliser having excellent anti-fatigue characteristics. An electric-welded stee...
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WO/2017/207660A1 |
The invention relates to a method for producing an elongate hollow body consisting of steel and having a polygonal cross-section, comprising the following steps: producing an intermediate hollow body having a round cross-sectionfrom a fl...
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WO/2017/134186A1 |
A method for producing a tube of a stainless steel alloy tube which comprises the steps of hot working a stainless steel casting into a pretubular shaped workpiece or into a cylindrical bar, trepanning the cylindrical bar or machining an...
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WO/2017/068533A1 |
The present invention relates to a multi-stand rolling mill (1 ) for tubular bodies. The rolling mill comprises a first section (10) for rolling on mandrel defined by a first plurality of rolling stands (15', 15, 15") arranged in sequenc...
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WO/2017/005666A1 |
The invention relates to a device and a method for producing a pipe (1) from a hollow block (2) which has an opening (3). The device has a rolling mill (30) for rolling the hollow block (2) via a rolling rod (21) introduced into the open...
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WO/2016/202551A1 |
A rotary extrusion machine (20) comprising: a rotatable spindle (21) comprising clamping means (211) for clamping a first end of a workpiece and for rotating said workpiece around a first axis; a punch (22) rotatable around said first ax...
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WO/2016/084298A1 |
Provided are a device array for manufacturing a seamless steel pipe or tube and a method for manufacturing a high-strength duplex stainless steel seamless pipe or tube for oil wells with superior low-temperature toughness. The device arr...
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WO/2016/016751A1 |
The present invention relates to a compact plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which defines a rolling axis XPR and is designed to pierce a billet (11) pressed against a plug (22) mounted on ...
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WO/2016/016750A1 |
The present invention relates to a plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which is designed to pierce a billet (11) pressed against a plug (22) mounted on a rod so as to obtain a pierced blank (...
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WO/2016/016224A1 |
The invention relates to a method for producing hot-rolled seamless pipes having at least one thickened wall portion that can be arranged at arbitrary positions across the length of the pipe, wherein by means of a multi-stand rod rolling...
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WO/2015/175688A1 |
Reflectors for solar concentration and methods for formation thereof. A reflective assembly (1340) may include a plurality of elongate panels (370) forming a continuous trough (1330), and a frame (1230) configured to support the panels, ...
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WO/2014/182198A1 |
The method provides uniformity of the mechanical properties of thick-walled and thin-walled parts of pipes of variable cross section. The method is distinguished in that, first, a tubular semifinished product is subjected to deformati...
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WO/2014/045140A2 |
The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is ar...
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WO/2014/027655A1 |
This powder lubricant composition includes 65-95 parts by mass of sodium borate and 5-35 parts by mass of cryolite. This method for manufacturing a seamless steel tube has a powder lubricant composition attachment step for attaching the ...
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WO/2014/017370A1 |
This seamless metal tube fabrication method is provided with the following: a step for determining whether to use the group of front stage stands for reducing the outer diameter or reducing the thickness of the hollow raw pipe, and a ste...
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WO/2014/017372A1 |
This seamless metal tube fabrication method is provided with the following: a step for preparing a plurality of mandrel bars the work sections of which that come into contact with the hollow raw pipe during drawing and rolling have diffe...
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WO/2013/115138A1 |
Provided is a hot-working tool having superior seize resistance. The present embodiment of a hot-working tool is provided with a substrate and a plating film. The plating film is formed at the substrate surface. Furthermore, the plating ...
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WO/2013/018564A1 |
The present invention provides a controlled rolling method of a seamless steel tube excellent in strength and low-temperature toughness to be applied to a process of making a seamless steel tube, and this controlled rolling method compri...
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WO/2012/133484A1 |
Provided is a method for manufacturing a roll for reducing, wherein the occurrence of fin flaws and edge flaws can be suppressed. A roll for reducing used in a three-roll reducing mill is prepared. Next, while the roll for reducing is be...
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WO/2012/120111A1 |
A tube rolling plant (R) with multi-stand rolling mill having two or more rollers, for implementing a mandrel rolling process with controlled speed has a mandrel (31) which is inserted into the hollow body (39) from the frontal opening t...
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WO/2012/075095A2 |
A pipe element has a circumferential shoulder at one end. The shoulder has an outer diameter greater than the outer diameter of the pipe element. A groove is positioned adjacent to the shoulder. The groove has a floor surface with an out...
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WO/2012/005287A1 |
Provided is a mandrel mill which has three hole-type rolls disposed at each of a plurality of rolling stands and without increase in facility costs or degradation in maintainability, is capable of sufficiently preventing a phenomenon in ...
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WO/2011/154133A1 |
The invention relates to a method for producing seamless pipes of heated massive metal blocks, by means of a mandrel (4), which is fastened on a rolling rod (5), in the case of which a coating material is applied onto the inner side of t...
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WO/2011/148613A1 |
A three-roll fixed diameter rolling machine is used, and when the external diameter processing degree (ρi) (%) of an (i)th stand is represented by formula (1) below, fixed diameter rolling is carried out under conditions such that the e...
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WO/2011/107214A1 |
The invention relates to a hot work tool, in particular a piercing mandrel or a rolling bar for producing seamless pipes or a forging mandrel for hot forging tubular workpieces made of metal, said tool having a main tool body (2), wherei...
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WO/2011/050783A2 |
The invention relates to a device for the optimized circulation of mandrels, comprising a presentation and/or cooling table for mandrels, a lubricating station for the mandrels, in some cases an additional drying station for the lubrican...
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WO/2011/039942A1 |
A multi-roll mandrel mill in which "roll chock sections have been made compact" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality...
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WO/2011/039941A1 |
Disclosed are: a mandrel mill provided with a plurality of rolling stands, in which the rolling stands are provided with three grooved rolls, the three grooved rolls constitute a groove by the rolled surfaces, and when the diameter of th...
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WO/2011/039943A1 |
Disclosed are a retract mandrel mill and a method for rolling tubing using the mandrel mill. The retract mandrel mill is provided with a mandrel mill and an extractor. The mandrel mill includes a mandrel bar and is for rolling a tubing w...
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WO/2011/018956A1 |
Provided is an apparatus for adjusting a screw-down position by which an engagement failure of a leading end of a tubular member which is rolled by a three-roll type mandrel mill, or the like can be prevented. An apparatus (100) for adju...
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WO/2010/097232A1 |
Disclosed is a roll stand comprising at least two rolls (1) which are designed and arranged so as to form a pass for rolling rod-shaped or tube-shaped rolling stock (2) and so that the rolling stock passes in a rolling direction W during...
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WO/2010/082584A1 |
Disclosed are a lightweight hollow member, which is highly strong, at e.g., 780 MPa or greater, has complex shapes applicable to automotive components, is highly rigid, and has excellent impact characteristics, and a manufacturing device...
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WO/2010/073035A1 |
A method of construction of a tungsten carbide/TSP insert for hard facing a wear surface comprises the steps of forming a tungsten carbide body (12) in a mould. After the moulding step, a channel section slot (24) or pocket (24') is crea...
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WO/2009/141414A1 |
A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules bein...
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WO/2009/035106A1 |
Provided is a roll forming device, which is equipped with a forming roll capable of manufacturing such a mechanism simply and precisely as to input a rotating drive force to the forming roll. The roll forming device inputs the rotating d...
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WO/2009/030105A1 |
A manufacturing technique of seamless steel pipe comprises process steps as follows, producing a hollow blank pipe(1) with annular cup bottom(2) at one end by centrifugal casting, executing machinework on the inner and outer surface of t...
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WO/2008/146493A1 |
[PROBLEMS] To provide a mandrel mill or the like that attains not only enhancing of pipe draw ratio but also suppression of pinhole defect occurrence. [MEANS FOR SOLVING PROBLEMS] The first means is a mandrel mill equipped with multiple ...
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WO/2008/128417A1 |
A seamless steel tube four-roller-type heat sizing mill includes a sizing mainframe, a roller changing vehicle (1) and locking hydraulic cylinders (7). The sizing mainframe comprises a frame, level sizing roller groups and side standing ...
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WO/2008/126633A1 |
A process for manufacturing a seamless pipe, in which cracking at pipe end portions can be effectively prevented in the stretch rolling step by means of a mandrel mill. The process for manufacturing a seamless pipe is characterized by in...
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