US3727025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for welding vertically extending pipe sections together
Assignee: Rig Hammers Inc
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Filing: 1970-03-24
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Granted: 1973-04-10
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Expires: 1990-03-24
Abstract
Abstract A method for welding substantially vertically extending pipe sections together in end-to-end relationship, wherein at least one of the adjacent ends of the sections is bevelled to provide a welding space between the sections, and a means for depositing weld metal is moved about the sections to deposit weld metal in such space while all of the welding parameters are controlled and maintained irrespective of environmental-induced movements of the sections.
Inventors
- 👤 A Dibenedetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:26
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282; B23K9/0286
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
226 words
A method for welding a pair of vertically extending pipe sections together by the use of a weld metal depositing means, each said pipe section having a wall defining an inner surface and outer surface, said method comprising: placing said pipe sections in substantially vertically extending relationship with one end of one said section disposed adjacent one end of the other said section to form a weld space between said adjacent one ends, establishing at the beginning of each welding pass a predetermined separation and attitude between said weld metal depositing means and the base metal or previously deposited weld metal along with a predetermined weld metal deposition rate by said weld metal depositing means, moving said weld metal depositing means about said sections to deposit weld metal in said weld space in at least one welding pass around said sections beginning at said inner surfaces and working progressively therearound and outwardly to fill said weld space with weld metal, while maintaining constant said predetermined separation and attitude and said predetermined weld metal deposition rate irrespective of environmentally induced movements of said pipe sections and dimensional inaccuracies in said pipe sections or said weld space, and controlling the physical characteristics of said deposited weld metal by regulating only the rate of movement of said weld metal depositing means along said weld space about said pipe sections.
Claim 2
Independent Claim
226 words
A method for welding a pair of vertically extending pipe sections together by the use of a weld metal depositing means, each said pipe section having a wall defining an inner surface and outer surface, said method comprising: placing said pipe sections in substantially vertically extending relationship with one end of one said section disposed adjacent one end of the other said section to form a weld space between said adjacent one ends, establishing at the beginning of each welding pass a predetermined separation and attitude between said weld metal depositing means and the base metal or previously deposited weld metal along with a predetermined weld metal deposition rate by said weld metal depositing means, moving said weld metal depositing means about said sections to deposit weld metal in said weld space in at least one welding pass around said sections beginning at said inner surfaces and working progressively therearound and outwardly to fill said weld space with weld metal, while maintaining constant said predetermined separation and attitude and said predetermined weld metal deposition rate irrespective of environmentally induced movements of said pipe sections and dimensional inaccuracies in said pipe sections or said weld space, and controlling the physical characteristics of said deposited weld metal by regulating only the rate of movement of said weld metal depositing means along said weld space about said pipe sections.
Claim 3
Dependent Claim
48 words
A method as recited in claim 1 further comprising the initial step of forming a bevel at said one end of at least one said section, said bevel extending across said wall of said one section from said inner surface to said outer surface thereof and opening outwardly.
Claim 4
Dependent Claim
28 words
A method as recited in claim 2 wherein said adjacent one ends are placed onto contact with one another prior to depositing weld metal in said weld space.
Claim 5
Dependent Claim
44 words
A method as recited in claim 1 further comprising the initial steps of attaching a backing strip to said oNe end of one said section and inserting said backing strip into the other said section when said one ends are placed adjacent each other.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |