Consumeables Catalog - Lincoln Electric

Pipeliner ® LH-D Welding - Helpful Hints
Pipeliner ® LH-D80, LH-D90 and LH-D100 are
low hydrogen, high deposition electrodes specially
designed for the vertical down welding of
pipe. They are recommended for fill and cap pass
welding of up to X70, X80 and X90 pipe, as well as
pipe repair and hot tapping applications. For low
diffusible hydrogen, high productivity and operator
appeal — choose Pipeliner ® LH-D electrodes.
Use Recommended Starting and
Stopping Techniques
Porosity can be the result of incorrect starting
or stopping techniques. Refer to Diagram #2
and #5 below.
TYPICAL OPERATING PROCEDURES
Polarity 3.2 mm (1/8 in)
Current (Amps)
4.0 mm (5/32 in) 4.5 mm (11/64 in)
DC+ 120 - 170 170 - 250 200 - 300
Direction of Travel
Decrease Current
0-10°
12
o’ clock
6
o’ clock
0-10°
Switch to Push Angle
3
o’ clock
0-10°
1.6mm (1⁄16”)
Max. Arc Length
0-10°
Welding Guidelines Diagram
0-10°
Increase Current
2
4
PIPELINER ® CONSUMABLES
LH-D80/90/100
STARTING THE ARC
Touch start tapered
tip in weld crater.
BEAD CONTOUR
WRONG
Narrow gap
3
5
Welding Guidelines
Make Sure Operating Procedures are Correct
Pipeliner ® LH-D electrodes recommended operating
ranges are in the table below.
Do Not Re-Strike Electrode
If arc does not initiate on first try, discard electrode and
start with a new one.
Technique Tips for Weld Positions
12 o’clock Decreased current and rod angle
will reduce spatter.
3 o’clock Increased current will help hold
weld puddle up.
6 o’clock A push angle and weave will help
flatten bead.
Use the Recommended Weaving Technique
Weaving too wide can cause undercutting and slag
entrapment. Use a maximum weave width of
approximately 2 times electrode diameter. Refer to
Diagram #3 below for directions.
RIGHT
Correct gap
0-10°
WEAVE WIDTH
Recommended maximum weave width
is 2X diameter of electrode.
Electrode diameter
BREAKING THE ARC
RIGHT WRONG
NOTE 1: This table indicates common welding electrodes by API 5L pipe grade. Final product selection should be project specific. The specific electrode
recommendation depends on project specifications, including strength overmatch and minimum toughness requirements. For help in selecting the appropriate
consumables and other technical questions, please contact our Pipe Welding Application Group at +1.866.635.4709 or email appengr@lincolnelectric.com.
NOTE 2: Please note that the welding consumable recommendations in this table are based on weld metal strength matching the nominal pipe strength based
upon API 5L minimum requirements. Recommended consumables in this chart are based upon these standards and not actual strength of pipe.
WELDING CONSUMABLES CATALOG ı 313