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A large-diameter stainless steel thin-walled tube

A technology for stainless steel and thin-walled pipes, applied in the field of large-diameter thin-walled stainless steel pipes and stainless steel pipes, can solve the problems of poor pressure resistance of white iron chimneys, inconvenient maintenance and replacement, and poor cold resistance, so as to improve mechanical performance and resistance to cold. Corrosion performance, the effect of improving easy deformation and collapse, excellent corrosion resistance

Active Publication Date: 2017-02-22
NINGBO CO WILL STAINLESS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC plastic pipes have their own insurmountable defects in many aspects: (1) PVC plastic pipes are brittle and flammable in the event of impact, and there are certain safety hazards; (2) poor cold resistance, in frigid regions, PVC plastic pipes It is easy to be broken, which causes great inconvenience to people's lives. Even in tropical and subtropical areas, PVC pipes are easily exposed to sunlight and ultraviolet rays, which accelerates aging; (3) PVC plastic pipes are prone to water leakage at the rainwater interface elbows, and maintenance and replacement are inconvenient; 4), PVC plastic pipes generally adopt a straight circular design, and there is a possibility of slipping after being fixed with a clamp; (5) The biggest disadvantage of PVC: it is poisonous to humans and the environment
Some toxic additives and plasticizers in PVC may seep or vaporize; some additives will interfere with biological endocrine (affect reproductive function), and some may increase the risk of cancer; when burning PVC waste, it will also produce secondary pollutants like the production process. Dioxin
Dioxins are highly toxic substances that can cause cancer and other diseases; they are also a global threat because they are widely dispersed in the environment and cannot be dissipated
After the iron pipe and white iron sheet are oxidized, or the sealing of the turning joint is not strong during the installation process, it often causes the leakage of toxic gas and causes certain harm to the human body
The tin chimney has poor compression resistance, and the tin chimney will become flat when an adult stands
The chimney of the heating furnace made of cement pipes is heavy and bulky, and it is troublesome to install, and there is no sealed elbow connection, which has poor heat dissipation and is easy to burn at high temperatures

Method used

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  • A large-diameter stainless steel thin-walled tube
  • A large-diameter stainless steel thin-walled tube
  • A large-diameter stainless steel thin-walled tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: as figure 1 As mentioned above, the large-diameter stainless steel thin-walled pipe is straight and mainly used for rainwater pipes, and can also be used for chimney pipes and wiring pipes.

[0051] Preparation of large-diameter stainless steel thin-walled pipes for rainwater pipes

[0052] Stainless steel with the following composition and mass percentage is selected: carbon (C): 0.02% by weight, chromium (Cr): 18.0% by weight, silicon (Si): 0.8% by weight, manganese (Mn): 0.7% by weight, nitrogen (N): 0.03% by weight, titanium (Ti): 0.4% by weight, niobium (Nb): 0.4% by weight, phosphorus (P): 0.02% by weight, sulfur (S): 0.01% by weight, and the balance is iron (Fe). There are common stainless steel pipe production processes in the art: feeding blanks, calendering, annealing, coiling into pipes, welding, water-cooled cutting, weld seam grinding, and forming to produce large-diameter stainless steel thin-walled pipes for rainwater pipes. Wherein, the r...

Embodiment 2

[0054] Embodiment 2: as Figure 4 As mentioned above, the large-diameter stainless steel thin-walled pipe is L-shaped and is mainly used for wiring pipes, and can also be used for rainwater pipes and chimney pipes.

[0055] Preparation of large-diameter stainless steel thin-walled tubing for wiring ducts

[0056] Stainless steel with the following composition and mass percentage is selected: carbon (C): 0.008% by weight, chromium (Cr): 18.3% by weight, silicon (Si): 0.3% by weight, manganese (Mn): 0.3% by weight, nitrogen (N): 0.05% by weight, titanium (Ti): 0.3% by weight, niobium (Nb): 0.5% by weight, phosphorus (P): 0.022% by weight, sulfur (S): 0.002% by weight, and the balance is iron (Fe). There are common stainless steel pipe production processes in the art: feeding blanks, calendering, annealing, coiling into pipes, welding, water-cooled cutting, weld seam grinding, and forming to produce large-diameter stainless steel thin-walled pipes for wiring pipes. Among them, ...

Embodiment 3

[0058] Embodiment 3: as Figure 5 As mentioned above, the large-diameter stainless steel thin-walled pipe is Z-shaped, and is mainly used for chimney pipes, and can also be used for rainwater pipes and wiring pipes.

[0059] Preparation of large-diameter stainless steel thin-walled pipes for chimney pipes

[0060] Stainless steel with the following composition and mass percentage is selected: carbon (C): 0.01% by weight, chromium (Cr): 18.0% by weight, silicon (Si): 0.39% by weight, manganese (Mn): 0.70% by weight, nitrogen (N): 0.012% by weight, titanium (Ti): 0.5% by weight, niobium (Nb): 0.45% by weight, phosphorus (P): 0.015% by weight, sulfur (S): 0.02% by weight, and the balance is iron (Fe). There are common stainless steel pipe production processes in the art: feeding blanks, calendering, annealing, coiling into pipes, welding, water-cooled cutting, weld seam grinding, and forming to produce large-diameter stainless steel thin-walled pipes for chimney pipes. Wherein,...

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Abstract

The invention provides a large-aperture stainless steel thin-walled tube, and belongs to the technical field of pipelines. The large-aperture stainless steel thin-walled tube solves the problem that existing rainwater pipes and stovepipes are large in weight and size, short in service life and troublesome to install. The large-aperture stainless steel thin-walled tube comprises a cylindrical tube body, wherein the thickness of the pipe body wall made of stainless steel materials ranges from 0.25mm to 0.6mm, a plurality of reinforcing ribs are evenly distributed on the tube body in the axial direction, a ripple portion is arranged on the tube body, and the ripple portion is composed of a plurality of annular arc-shaped embossments which are tightly arranged. The large-aperture stainless steel thin-walled tube has the advantages of being safe, sanitary, long in service life, light in weight and resistant to corrosion.

Description

technical field [0001] The invention belongs to the technical field of pipes, and relates to a stainless steel pipe, in particular to a large-diameter thin-walled stainless steel pipe suitable for outdoor drainage of buildings and smoke exhaust of boilers and heating furnaces. Background technique [0002] At present, PVC plastic pipes are the main components of outdoor rainwater pipes in buildings. PVC plastic pipes have their own insurmountable defects in many aspects: (1) PVC plastic pipes are brittle and flammable in the event of impact, and there are certain safety hazards; (2) poor cold resistance, in frigid regions, PVC plastic pipes It is easy to be broken, which causes great inconvenience to people's lives. Even in tropical and subtropical areas, PVC pipes are easily exposed to sunlight and ultraviolet rays, which accelerates aging; (3) PVC plastic pipes are prone to water leakage at the rainwater interface elbows, and maintenance and replacement are inconvenient; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/04F16L9/06C22C38/28
CPCC22C38/28F16L9/04F16L9/06
Inventor 朱兴康
Owner NINGBO CO WILL STAINLESS
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