Application：
The LNG pipeline design in China is X70 or X80 grade. Two-Run welding is normally used in pipeline welding, and the dilution rate of base metal is higher than that of conventional multilayer and multiple welding, therefore the pipeline welding requirement is very strict. In order to improve production efficiency, multi arc welding applications in pipe-making industry are normally used. Due to different pipe thickness and process, in China, there are applications from double wire welding to five wire welding, the arc stability and energy-saving requirements are very high.
High-grade steel pipe welding solution
High-grade steel pipe welding solution
| Application: | High-grade steel pipe |
| Base metal: | X70, X80 |
| Process: | Multiple Arc submerged-arc welding with two-run |
| Focus: |
20°C impact _100J or （≥47J@-40℃）；H5Lowhydrogen |
| Welding equipment: | POWER WAVE® AC/DC 1000® SD +MAXSA®10 Controller |
| Welding consumable: | JW®-9(H08MnMoTiB)/SJ-101GH |
| Welding Data | For Butt joint on X70,X80 by Two-run welding, JW®-9/SJ-101GH can reach excellent level for impact test at =-20°C.; Deposited metal meets the requirement of low hydrogen _5ml/100g. |
Welding Challenge
In order to improve the welding quality & labor productivity, and reduce the labor intensity, automatic welding process for the long-distance pipeline welding has been developed and promoted based on the original manual welding process, semi-automatic welding process. LINCOLN ELECTRIC® has rich application experience and perfect solution in automatic welding process.
| Application | Automatic welding for pipeline |
| Base Metal: | X70，X80 |
| Process: | All position automatically |
| Focus: | -10°C average impact ≥80J (min impact≥60J) |
| Welding Equipment: | POWER WAVE® S350 + STT® Module |
| Recommended Consumable: |
PIPELINER® 70S-6; PIPELINER® 80Ni1 |
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