FIELD: electricity; processes.
SUBSTANCE: corrosion-resistant steel rings are welded to internal sides of pipe ends. The pipes are connected by pulse-arc welding with pulse current flow duration Cp=230...270 ms and inter-pulse current flow duration Ci=240...280 ms. The austenitic electrodes with chemical content being close to corrosion-resistant steel are used for welding.
EFFECT: simple method, improved quality of double-layer pipes welding, safe-keeping of enameled coating at the internal surface of pipes and protection of weld joints from corrosion.
2 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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RU2410593C2 |
| ELECTRIC ARC WELDING METHOD BY MEANS OF CONSUMABLE ELECTRODE WITH PULSE MODULATION OF CURRENT | 2004 |
|
RU2268809C1 |
| AUTOMATIC ARGON-ARC PULSE WELDING METHOD FOR MAKING STEEL TUBES WITH USE OF NON-MELTING ELECTRODE | 2004 |
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RU2262424C1 |
