A processing method of bimetal compound single weld elbow
A processing method and composite technology, applied in the field of natural gas transmission pipeline equipment, can solve the problems of low production efficiency, single structure and high manufacturing cost, and achieve the effect of high production efficiency and guaranteeing stability.
Active Publication Date: 2016-07-20
CANGZHOU LONGTAIDI PIPE TECH
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Problems solved by technology
[0002] Some natural gas fields that have been developed in China contain a large amount of hydrogen sulfide. The transportation pipeline from the well station to the natural gas purification plant is one of the most dangerous gathering and transportation pipelines. It is generally made of single-layer nickel-based materials. Its structure Single, expensive, poor corrosion resistance
In the prior art, surfacing welding is generally used to make pipe fittings, which has low production efficiency, heavy welding workload, and unstable quality of nickel-based cladding layer.
The surfacing welding of the product will cause the dilution of the alloy material of the bonding layer, the instability of the alloy element composition will reduce the corrosion resistance effect, and the product quality is unreliable
At the same time, the production efficiency is low and the manufacturing cost is high
Method used
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[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0021] Such as figure 1 and 2 As shown, the processing method of the bimetal composite single-weld elbow is characterized in that the elbow includes a carbon steel outer layer and a nickel-based steel plate inner layer, and also includes the following processing steps:
[0022] 1) Initial pressing: use the elbow to press the tire for the first pressing, and the welding seam should be placed on the inner arc side. When hoisting, the lifting tool and the tooling in contact with the inner layer must be welded on the surface by argon arc welding. One layer of stainless steel, the inner core and key are supported inside the elbow, and the end is supported by a disc, which is pressed into a pipe fitting;
[0023] 2) Fla...
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The invention relates to the technical field of natural gas conveying pipeline equipment, in particular to a method for machining a bimetal composite single-weld-seam bend. The method is characterized in that a carbon steel outer layer and a nickel-based steel plate inner layer are pressed to form a single-weld-seam composite steel tube and then pressed into a bend structure, and a single weld seam is arranged on the center side of an inner arc. By the adoption of the composite plate steel tube pressing process, primary pressing, the flattening process, no-center pressing, end portion machining flattening, thermal processing and finishing processing are carried out, so that stability of corrosion resistance of an alloy covering layer is guaranteed, automatic welding is achieved when welding work is transferred to straight tube manufacturing, and production efficiency is high.
Description
technical field [0001] The invention relates to the technical field of pipeline equipment for natural gas transmission, in particular to a processing method for a bimetal composite single-weld elbow. Background technique [0002] Some natural gas fields that have been developed in China contain a large amount of hydrogen sulfide. The pipeline used for transporting from the well station to the natural gas purification plant is one of the most dangerous gathering and transportation pipelines. It is generally made of single-layer nickel-based materials. Its structure Single, expensive, poor corrosion resistance. In the prior art, the surfacing welding method is generally used to manufacture pipe fittings, which has low production efficiency, heavy welding workload, and unstable quality of the nickel-based cladding layer. The surfacing of the product will cause the dilution of the alloy material of the bonding layer, the instability of the alloy element composition will reduce ...
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IPC IPC(8): B23P15/00
CPCB21C37/28
Inventor 仉新钢张涛刘景阳孙丽王春建韩智平王铁峰
Owner CANGZHOU LONGTAIDI PIPE TECH