c2440
2
LH-D80/90/100 WELDING GUIDELINES BREAKING THE ARC BEAD CONTOUR STARTING THE ARC 3 2 5 4 Recommended maximum weave width is 2X diameter of electrode. Electrode diameter WRONG Narrow gap Touch start tapered tip in weld crater. 0-10° 0 - 1 0 ° 0 - 1 0 ° 12 o’ clock 3 o’ clock 6 o’ clock 0 - 1 0 ° 0-10° ⁄” Max. Arc Length D i r e c t i o n o f T r a v e l I n c r e a s e C u r r e n t Decrease Current RIGHT Correct gap WEAVE WIDTH RIGHT WRONG 0-10° Switch to Push Angle
description
Welding Guide
Transcript of c2440
-
LH-D80/90/100WELDING GUIDELINES
BREAKING THE ARCBEAD CONTOUR
STARTING THE ARC32
54
Recommended maximum weave widthis 2X diameter of electrode.
Electrode diameter
WRONGNarrow gap
Touch start taperedtip in weld crater.0-10
0-10
0-10
12o clock
3o clock
6o clock
0-10
0-10
116 Max. Arc Length
Dire
ction
ofTra
vel
Incr
ease
Cur
rent
Decrease Current
RIGHTCorrect gap
WEAVE WIDTH
RIGHT WRONG
0-10
Switch to Push Angle
-
Pipeliner LH-D80, LH-D90 and LH-D100 are low hydrogen,high deposition electrodes specially designed for the verticaldown welding of pipe. They are recommended for fill and cappass welding of up to X70, X80 and X90 pipe, as well as piperepair and hot tapping applications. For low diffusiblehydrogen, high productivity and operator appeal choosePipeliner LH-D electrodes.
Use Recommended Starting and Stopping TechniquesPorosity can be the result of incorrect starting or stoppingtechniques. Refer to Diagram #2 and #5 on opposite side.
Make Sure Operating Procedures are CorrectPipeliner LH-D electrodes recommended operating rangesare in the table below.
Do Not Re-Strike ElectrodeIf arc does not initiate on first try, discard electrodeand start with a new one.
Technique Tips for Weld Positions12 oclock Decreased current and rod angle will
reduce spatter.3 oclock Increased current will help hold weld
puddle up.6 oclock A push angle and weave will help
flatten bead.
Use the Recommended Weaving TechniqueWeaving too wide can cause undercutting and slagentrapment. Use a maximum weave width of approximately2 times electrode diameter. Refer to Diagram #3 on oppositeside for directions.
Use a Lincoln Electric Recommended Power SourceUse a Lincoln Electric power source with output capabilityto run at recommended operating procedures (120 - 300Amps DC+). We have evaluated and recommend thefollowing machines:
TYPICAL OPERATING PROCEDURES
Polarity
Current (Amps)3.2 mm(1/8 in.)
4.0 mm(5/32 in.)
4.5 mm(11/64 in.)
DC+ 120 - 170 170 - 250 200 - 300
Vantage 300 Vantage 400 Vantage 500 Classic 300D
SAE-400 Ranger 305D Ranger 305G Invertec V350 PRO
Vantage 500
C2.440 1/09
Pipeliner LH-D Welding Helpful Hints
