 AWS : E-6010 SFA-5.1 CELLULOSE COATED PIPE WELDING ELECTRODE |
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» KOBE - 31 |
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is a light, cellulose coated deep penetration Pipe Welding Electrode, specially suitable for
Radiography quality welds in all position. Suitable for root and filler layers in pipe welding
The arc is stable. Welding can be done in all position including verticaldownward and overhead without any difficulty. |
| Mechanical Properties Of All Weld-metal: |
| Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation
(L=4d)% |
Impact strength CNV at-30 C |
330-380 |
430-530 |
22-28 |
27 J at- 30° C |
| Weld Metal Properties |
Recommended current (Amps.) |
| C |
0.12 % |
Size (mm) |
Current Amps |
| Mn |
0.60 % |
2.50 X 350 |
50 - 70 |
| Si |
0.40 % |
3.15 X 350 |
70 X 110 |
| S |
0.03 % |
4.0 X 350 |
110 X 140 |
| P |
0.03 % |
5.0 X 350 |
140 - 180 |
Applications :
Widely used for low and high pressure pipe lines, storage tanks constructions, ship building and cross country pipe lines etc. |
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AWS : E-7010G SFA-5.5 HIGH PRESSURE PIPE WELDING ELECTRODE |
| » KOBE - 7010 |
| is a Medium coated, medium-tensile electrode. Specially suitable for all - position welding of low or high pressure pipe lines by conventional or stove-pipe technique.
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| Weld Metal Chemical Properties |
Mechanical Properties Of All Weld-metal |
| C |
0.12 % |
Y. S. (MPa) |
| Mn |
0.60 % |
UTS (MPa) |
| Si |
0.40 % |
El. (L=4d)% |
| S |
0.40 % |
Impact CNV at-29° C |
| P |
0.03 % |
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Applications :
Used for all position welding in high tensile pipelines for oil and gas transmission, road building equipments, pressure vessels, drill platform, ships, boilers etc. |
USAGE CHARACTERISTICS : |
| KOBE 7010 can be used for welding high strengh pipelines and pipe steels and is suitable for root, capping on pipes and filling runs. |
| Available : |
E-7010 A1 with Weld Metal Composition |
| C-0.12max |
Mn-0.15-0.50 |
Si-0.40max |
Mo-0.20-0.45 |
| Ni-0.15max |
P-0.03max |
S-0.04max |
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PIPE WELDING ELECTRODE IS SPECIALIZED ART |
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» E-6010 |
| "E-6010 Electrodes are characterized by a deeply, penetrating, forceful, spray type arc and ready removable, thin, friable slag which may not seem to completely cover the deposit. Fillet welds are usually relatively flat in profile and have rather coarse, unevenly spaced ripple. E-6010 Classified as High Cellulose Sodium type Electrode." |
API Standard 1104,2.2 |
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POSITIVE FEATURES OF KOBE-31 (E-6010) |
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Produces steady, Concentrated arc which forms a continuous bead inside of the. |
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PipeProduces a thin & stiff covering of slag. |
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Minimum tendencies to produce pin-holes or porosity or other defects and gives Radiography (X Ray) welds. |
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Uniform and uninterrupted Arc help excellent maneuverability of the Electrodeduring downhill welding. |
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Welders can reduce work-time drastically. It improves workmanship and
increase output. |
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Manufactured from imported cellulose & other ingredients. |
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TO GET BEST PERFORMANCE OF KOBE-31 E-6010 OR
KOBE-7010 G/A1 ELECTRODES PLEASE FOLLOW GUIDELINES: |
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Prepare joint as per API standards and do not removethe line up clamps until the stringer is completed. |
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Clean joint preparation. |
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Pre-heat the pipe at least at 50°C when the ambient
temperature is less then 20°C. |
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Make the stringer as large as practical. |
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Use recommended current and positive polarity for
stringent bead. |
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Always weld the stringer pass and hot pass in two(or more) men working on opposite side of the pipe. |
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For larger size pipe use four welders which will equalizestress forces. |
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Make the hot pass as soon as possible after the
stringer bead - Possibly within five minutes |
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Remove the slag from each bead by high speed wirebrush or light grinding. |
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In case of thin weld and high silicon content material pipes, Use negative polarity. |
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