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Composite steel pipe with flange and manufacturing method thereof

A technology of composite steel pipe and flange, which is applied to the field of stainless steel lined composite steel pipe and plastic lined composite steel pipe, which can solve the problem that the thread is not easy to tighten.

Inactive Publication Date: 2006-10-04
钱乐中 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The threaded connection between the pipe body and the pipe fittings is more reliable, but the thread with a large diameter above DN100mm is not easy to tighten

Method used

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  • Composite steel pipe with flange and manufacturing method thereof
  • Composite steel pipe with flange and manufacturing method thereof
  • Composite steel pipe with flange and manufacturing method thereof

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 It is a schematic cross-sectional view of the lined stainless steel composite steel pipe (1) of the present invention, (11) is an outer layer welded steel pipe, (12) is an outer galvanized layer or an outer plastic layer of an outer layer welded steel pipe, (13) is an inner liner thin Wall stainless steel pipe. Insert the thin-walled stainless steel pipe (13) into the inner hole of the outer layer welded steel pipe (11), expand the inner diameter of the lined thin-wall stainless steel pipe (13) by mechanical force or reduce the diameter of the outer layer welded steel pipe (11) by mechanical force , so that an interference fit is formed between (11) the outer layer welded steel pipe and (13) the inner layer stainless steel pipe, thereby forming a stainless steel-lined composite steel pipe (1). The surface of the welded steel pipe is hot-coated with a zinc layer (12) in a molten zinc bath at 480° C. before compounding. Or on the stainless steel clad steel pipe...

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PUM

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Abstract

The invention discloses a flannel composite steel pipe and manufacturing method, which is characterized by the following: (1) the outer galvanizing steel pipe or inner liner film stainless steel pipe forms inner liner stainless steel composite steel pipe through diameter reducing or enlarging; (2) when the composite steel pipe and flannel adapt screw connection, the flannel lining part contains silicon gel sealing ring; when the pipe body tightens the flannel through screw, the pipe body end clings the silicon gel sealing ring; (3) the inner layer of inner lining stainless steel pipe is film wall stainless pipe, which is welded with flannel through stainless steel bar; when the composite steel pipe with flannel is assembled, the fluid in the pipe and stainless steel pipe and welding gap touch; (4) two ends of polythene plastics is closed through chuck in the heat air stove through grafting heat melting gel, which is blown into lining composite pipe; (5) the end part of lining composite pipe with flannel is blown into bellmouthing shape, whose end is blown to cling the flannel end face to form flannel end face plastic-covering layer; the inner pipe wall and flannel end form the integral plastic-covering layer.

Description

technical field [0001] The invention relates to a bimetal composite steel pipe of carbon steel and stainless steel, that is, a stainless steel-lined composite steel pipe. The invention also relates to a composite steel pipe made of plastic and carbon steel, that is, a plastic-lined composite steel pipe. The invention relates to a flange that is threadedly connected between composite steel pipes and flanges, and the composite steel pipes are connected by flanges. The invention relates to a welded flange between an inner-lined stainless steel composite steel pipe and a flange, and the inner-lined stainless steel composite steel pipe is connected by a flange. The invention relates to a welded flange between a plastic-lined composite steel pipe and a flange, the plastic-lined composite steel pipe is connected by a flange, and the contact surfaces of the two flanges are coated with plastic. The invention relates to a manufacturing method of a composite steel pipe with a flange. ...

Claims

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Application Information

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IPC IPC(8): F16L9/02F16L9/147B32B1/08B32B37/00F16L23/02F16L47/14
Inventor 钱乐中滕万波
Owner 钱乐中
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