Improving the Bending Behaviour of Mechanically-Lined Rigid Pipe
US-2017341119-A1 · Nov 30, 2017 · US
Hot-dip galvanized steel pipe and method of manufacturing the same
US9593796B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9593796-B2 |
| Application number | US-201214395175-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2012 |
| Priority date | Apr 24, 2012 |
| Publication date | Mar 14, 2017 |
| Grant date | Mar 14, 2017 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
There are provided a hot-dip galvanized steel pipe in which the plating layer thereof is less liable to peel off even if the steel pipe is worked, and a method of manufacturing the hot-dip galvanized steel pipe. The hot-dip galvanized steel pipe includes a steel pipe and the plating layer formed on the surface of the steel pipe. Throughout the entire depth of plating layer, the fn defined by the following formula is at least 99.9: fn =Fe+Al+Zn where, the symbol of an element in the formula represents the content (mass %) of that element in the plating layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing a hot-dip galvanized steel pipe, comprising a step of dipping a material pipe in a hot-dip galvanizing bath, wherein the hot-dip galvanizing bath contains 0.002 to 0.01 mass % of Al, the balance being Zn and impurities, a Sn content of the impurities is less than 0.001%, an In content of the impurities is less than 0.001%, and a total content of Pb, Sn, Cd, Sb, Bi, Cu, Ni, and In of the impurities is at most 0.1 mass %. 2. The method of manufacturing a hot-dip galvanized steel pipe according to claim 1 , further comprising: a step of pickling the material pipe by applying sulfuric acid having a temperature of at least 65° C.; and a step of treating the pickled material pipe by applying a flux solution before the step of dipping the material pipe in the hot-dip galvanizing bath, wherein the flux solution containing at least 600 g/L in total of at least one of zinc chloride and ammonium chloride and 0.05 to 0.3 mass % of surface active agent.
Assignees
Inventors
Classifications
- F16L58/08Primary
by metal · CPC title
Thermal after-treatment, e.g. treatment in oil bath · CPC title
of metal (F16L9/16 - F16L9/22 take precedence) · CPC title
Alloys based on zinc · CPC title
Pretreatment of the material to be coated, e.g. for coating on selected surface areas (C23C2/30 takes precedence) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9593796B2 cover?
- There are provided a hot-dip galvanized steel pipe in which the plating layer thereof is less liable to peel off even if the steel pipe is worked, and a method of manufacturing the hot-dip galvanized steel pipe. The hot-dip galvanized steel pipe includes a steel pipe and the plating layer formed on the surface of the steel pipe. Throughout the entire depth of plating layer, the fn defined by th…
- Who is the assignee on this patent?
- Nippon Steel & Sumitomo Metal Corp
- What technology area does this patent fall under?
- Primary CPC classification F16L58/08. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 14 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).