Inner spinning stainless steel compound pipeline for conveying fluid
A technology for fluid transportation and composite pipelines, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., which can solve the problems of rare and precious metals lacking in nickel elements, and the high price of pure stainless steel pipes.
Inactive Publication Date: 2014-05-21
WUHU XINLI PIPELINE TECH
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Problems solved by technology
[0003] However, pure stainless steel pipes are expensive, and the nickel contained in them is a rare and precious metal that is increasingly scarce in the world.
Method used
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[0013] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and through the description of the preferred embodiments.
[0014] like figure 1 As shown, the inner-spinning stainless steel composite pipeline 1 for fluid conveying is formed by cold-spinning composite forming of an outer-layer seamless steel pipe 2 and an inner-layer pure stainless steel pipe 3 .
[0015] Fix the seamless steel pipe of the national standard on the spinning table, and insert the pure stainless steel pipe slightly smaller than the inner diameter of the seamless steel pipe by 4-8 mm on the inner wall of the seamless steel pipe. One end of the pure stainless steel pipe is flush with the seamless steel pipe and the other end is flush with the seamless steel pipe. It is 15-20mm longer than the seamless steel pipe and fixed to one end of the seamless steel pipe by mechanical flaring and flanging.
[0016] By accurately cal...
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The invention discloses an inner spinning stainless steel compound pipeline for conveying fluid. The inner spinning stainless steel compound pipeline for conveying fluid is formed by compounding a seamless steel pipe 2 at the outer layer and a pure stainless steel pipe 3 at the inner layer in a cold spinning mode. The seamless steel pipe 2 at the outer layer is characterized by being a 10-20# cold-drawing seamless or hot-rolling seamless steel pipe, and the wall thickness is 2.5-15mm according to the pressure bearing range. The pure stainless steel pipe 3 at the inner layer is characterized by being a 304-316L austenite high-quality and abrasion-resisting stainless steel thin-wall pipe, and the wall thickness of the pure stainless steel pipe 3 at the inner layer is set to be 0.3-1.5mm according to the outer diameter of a galvanized steel pipe and the specific characters of fluid. The inner spinning stainless steel compound pipeline for conveying fluid has the advantages that the purpose of conveying fluid of various types through stainless steel is completely achieved, cost is lowered largely, and precious nickel metal resources are saved.
Description
technical field [0001] The invention relates to the technical field of low-cost and high-performance metal composite pipes, in particular to an internal spinning stainless steel composite pipe for fluid transportation. Background technique [0002] As a fluid delivery pipeline, on the one hand, it cannot be contaminated by the fluid being transported, and on the other hand, the fluid itself must be kept clean. This requires very stable chemical properties and good pressure bearing capacity as a fluid delivery pipeline. Pure stainless steel pipe is currently the best choice for undertaking various types of fluid pipelines. [0003] However, pure stainless steel pipes are expensive, and the nickel element contained in them is a rare and precious metal that is increasingly scarce in the world. [0004] Based on the dual considerations of reducing costs and saving resources, countries around the world have been trying to find a composite pipe that basically replaces pure stain...
Claims
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Login to View More IPC IPC(8): F16L9/02
CPCF16L9/02
Inventor 汪正友
Owner WUHU XINLI PIPELINE TECH