JPS6417844A - Production of hot dip metal coated steel tube - Google Patents
Production of hot dip metal coated steel tubeInfo
- Publication number
- JPS6417844A JPS6417844A JP17424287A JP17424287A JPS6417844A JP S6417844 A JPS6417844 A JP S6417844A JP 17424287 A JP17424287 A JP 17424287A JP 17424287 A JP17424287 A JP 17424287A JP S6417844 A JPS6417844 A JP S6417844A
- Authority
- JP
- Japan
- Prior art keywords
- steel tube
- hot dip
- dip metal
- tube
- cost
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Coating With Molten Metal (AREA)
Abstract
PURPOSE:To produce a galvanized steel tube at a low equipment cost by rationarizing and simplifying the processes on the way at the tie of forming strip steel into the tube shape, welding it to the steel tube and producing the hot dipped steel tube by a hot dip metal coating method. CONSTITUTION:The steel tube 4 is produced from the strip steel 2 fed from an un-coiler 1 by a tube forming apparatus 3 consisting of a number of forming rollers, welding machine and drawing rollers and is annealed 14 at a high temp. to remove the stress at the time of working. The cooling after the annealing is stopped at >=150 deg.C and the steel tube 4 is subjected to a flux treatment 7 in the state of >=150 deg.C high temp. to remove the oxidation film on the surface thereof and the hot dip zinc coating, etc., is applied on the steel tube by a hot dip metal coating apparatus 9. Pickling and water washing treatments become unnecessary and reheating before the hot dip metal coating treatment becomes also unnecessary by stopping the cooling after the annealing at a high temp. and immediately subjecting the steel tube to the flux treatment, by which the equipment cost, pickling, water washing cost and reheating cost become unnecessary. The steel tube 4 is cooled 10 to a room temp., is immediately straightened by a straightening apparatus 11 and is finally cut to the prescribed length, by which the hot dip metal coated steel tube 15 is produced at a low cost.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17424287A JPS6417844A (en) | 1987-07-13 | 1987-07-13 | Production of hot dip metal coated steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17424287A JPS6417844A (en) | 1987-07-13 | 1987-07-13 | Production of hot dip metal coated steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6417844A true JPS6417844A (en) | 1989-01-20 |
Family
ID=15975200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17424287A Pending JPS6417844A (en) | 1987-07-13 | 1987-07-13 | Production of hot dip metal coated steel tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6417844A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194707A (en) * | 2013-04-19 | 2013-07-10 | 王怀成 | Production process and equipment of hot-galvanized double-layer coiled welded tube and hot-galvanized steel double-layer coiled welded tube product |
-
1987
- 1987-07-13 JP JP17424287A patent/JPS6417844A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194707A (en) * | 2013-04-19 | 2013-07-10 | 王怀成 | Production process and equipment of hot-galvanized double-layer coiled welded tube and hot-galvanized steel double-layer coiled welded tube product |
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