Abstract:
Provided are metal structures and methods of forming such structures for use in oil, gas and/or petrochemical applications that are joined with non- ferrous weld metal compositions or a high alloy weld metal compositions. The welded metal structures include two or more segments of ferrous or non-ferrous components, and fusion welds, friction stir welds or a combination thereof bonding adjacent segments of the components together, wherein the welds comprise a non-ferrous weld metal composition or a high alloy weld metal composition that is substantially different from the metal composition of the two or more components. The resultant welded structures exhibit improvements in fatigue resistance, toughness, strain capacity, strength, stress corrosion cracking resistance, and hydrogen embrittlement resistance compared to traditional iron- based weld compositions. The structures and methods of forming such structures are advantageous in joining metal components in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.
Abstract:
Disclosed herein is an automatic welding device for angle pieces mounted to corners in the cargo tanks of a membrane-type LNG tanker. The automatic welding device includes a carriage main body, a welding head rotating means, a welding head vertical movement means, a welding head lateral movement means, a welding head unit, and a welding torch. The carriage main body is mounted on a rail so as to be moved horizontally along the rail. The welding head rotating means is mounted to the upper surface of the carriage main body so as to be rotated. The welding head vertical movement means is mounted at a predetermined position on the upper surface of the welding head rotating means so as to be vertically and laterally moved. The welding head lateral movement means is connected with the welding head vertical movement means.
Abstract:
The vessel (1) comprises a side wall (2) and an end wall (3), and is characterized in that: a) said end wall (3) is a domed end wall (3'); b) said domed end wall (3') of thickness E I comprises: b1) a layer (4) called the inner layer C 1 providing corrosion resistance and b2) a layer (5) called the outer layer C E of thickness E E at least equal to the thickness E I of said inner layer C I (4); c) said inner C I (4) and outer C E (5) layers are rigidly joined by a so-called first assembly means (30); and d) said inner layer C I (4) is formed from a multilayer material comprising an internal layer C IC (40) for providing corrosion resistance and what is called an external layer C IS (41), said internal C IC (40) and external C IS (41) layers being rigidly joined by a so-called second assembly means (42). Advantages: possibility of manufacturing large vessels inexpensively.
Abstract translation:容器(1)包括侧壁(2)和端壁(3),其特征在于:a)所述端壁(3)是圆顶端壁(3'); b)厚度为E 1的所述圆顶形端壁(3')包括:b1)提供耐腐蚀性的称为内层C 1的层(4),和b2)a 称为厚度E E E的外层C E的层(5)至少等于所述内层C
Abstract:
A battery case including a cylindraceous body (1), a top lid plate (3) and a bottom lid plate (4), the top of the cylindraceous body (1) being open, the top lid plate (3) being fixed to the open of the top of the cylindraceous body (1) so as to cover the open, the said cylindraceous body (1) having a bottom which has a supporting table-board (8) having a open (2), the said bottom lid plate (4) being covered at the open (2) of the said supporting table-board (8). Further, the said open (2) is stepped or cone-shaped. Furthermore the bottom surface around the said open (2) is provided a first recess (12), a second recess (13) is provided on theoutside surface of the said bottom lid (4) near the said open (2) at the bottom of the said cylindraceous body. Also a battery made of the said case is disclosed.
Abstract:
The invention relates to a surface-treatment technique in association with ablation, a surface-treatment apparatus and a turbine scanner. The invention also relates to a method of producing a coating, a radiation transmission line, a copying unit and a printing unit. The invention further relates to an arrangement for adjusting the radiation power of a radiation source in a radiation transmission line and a laser apparatus.
Abstract:
A method for joining clad metal plates having a protective layer (27), e.g. titanium, and a substrate layer (28), e.g. carbon steel, includes firstly removing margins (29) of protective layer along edges of the clad metal plates to be joined. The substrate layers are then welded together to form an exposed substrate weld (31). Covering material (38) of the same type as the protective layer (27) is then located along the exposed substrate weld (31) to a level substantially flush with an outer surface of the protective layer (27). The substrate layer (28) is heated prior to welding the covering material so that the covering material is pre-stressed when cooled. The method may be used to fabricate reaction vessels having seams that do not stand proud of the remainder of the interior surface of the vessel. The low profile seams are less susceptible to erosion than has been the case in the past so that longer-life vessels can be produced. The invention encompasses vessels such as autoclaves, crucibles and reaction vessels formed of clad plate joined by the method.
Abstract:
A pulsated magnetic welding method and a welding induction coil for sealing a vessel (10) are provided. The method includes providing a vessel's body (11) having an open end (12) a cover (13) including a welding part and a brim part (15). A diameter of the cover (13) at the welding part (14) is less than the diameter of the vessel's body (11) for providing an air gap (16) between the vessel's body (11) and the welding part (14). The cover (13) is placed within said open end (12) of the vessel's body (11). A welding induction coil (18) is provided around the vessel's body (11) at the place where the welding part (14) of the cover (13) is located. The welding induction coil (18) is energized to generate a pulsed magnetic force sufficient to cause bending a portion (19) of the vessel's body (11) in a radially inward direction around the cover (13) in the air gap (16). The pulsed magnetic force has such a value so to provide mutual diffusion of atoms of the vessel's body (11) and the cover (13) at their impact, thereby to weld the vessel's body (11) and the cover (13) to each other.