Threading steel pipe with identification layer
The utility model discloses a threading steel pipe, and especially relates to a threading steel pipe with an identification layer. The outer wall of the threading steel pipe is provided with a zinc-plated layer, and the surface of the zinc-plated layer is provided with an identification layer. The i...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The utility model discloses a threading steel pipe, and especially relates to a threading steel pipe with an identification layer. The outer wall of the threading steel pipe is provided with a zinc-plated layer, and the surface of the zinc-plated layer is provided with an identification layer. The inner wall of the threading steel pipe is provided with a fastening groove, and the fastening groove and the inner wall of the threading steel pipe are respectively provided with an epoxy resin protection layer. The threading steel pipe provided by the utility model can prolong the service life of a wire, and improves the maneuverability. |
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