The Lincoln Electric Pipeliner LH-D90 is an AWS A5.5/A5.5M E9045-P2 low-hydrogen SMAW stick electrode engineered for demanding pipeline welding applications. Featuring 90 ksi minimum tensile strength and a DC+ only, all-position operating characteristic including vertical-down capability, the Pipeliner LH-D90 is specifically designed to meet the stringent quality requirements of pipeline field welding, producing X-ray quality welds with superior arc stability and excellent bead profile. WeldingMart is an authorized Lincoln Electric distributor — stock ships from our Wisconsin facility with full manufacturer warranty and certified weld professional support.
Related products: Stick Electrodes (SMAW) | Stick Welders.
| Process | SMAW (Shielded Metal Arc Welding / Stick) |
|---|---|
| AWS Classification | E9045-P2 |
| Electrode Type | Low Hydrogen (LH) |
| Alloy Class | Low Alloy Steel |
| Minimum Tensile Strength | 90 ksi (620 MPa) |
| Polarity | DCEP (DC+) only |
| Positions | All positions including vertical-down |
| Available Diameters | 1/8 in, 5/32 in |
| Package Size | 10 lb Easy Open Can (3-Pack) |
| Application Focus | Pipeline welding, vertical-down passes |
- Cross-country pipeline welding: The P2 designation in E9045-P2 confirms qualification for pipeline welding per API 1104 and AWS D10.11 — covering fill and cap passes on high-pressure natural gas and petroleum pipelines.
- Vertical-down pipeline passes: Pipeliner LH-D90’s fast-freeze slag system supports the vertical-down technique used on transmission pipeline girth welds, where travel speed and bead profile control are critical for productivity and pass geometry.
- High-strength pipe fabrication: 90 ksi minimum tensile strength makes this electrode appropriate for X65, X70, and similar API 5L high-strength line pipe grades requiring matching or overmatching filler metal.
- Field repair and tie-in welds: Compact stick electrode format and wide amperage range enable field use on pipeline repair, hot-tap, and tie-in operations where semi-automatic or GMAW equipment is impractical.
- Pressure vessel and boiler fabrication: Low hydrogen classification and 90 ksi tensile support use on high-pressure carbon and low-alloy steel vessels where hydrogen cracking risk mitigation is required.
Pipeliner LH-D90 requires a CC (constant current) DC welding power source capable of providing the amperage range appropriate for the selected electrode diameter. Compatible Lincoln Electric platforms include the Vantage, Ranger, and Idealarc engine-driven welders, as well as Invertec and Flextec DC inverter power sources. As a DCEP (DC+) only electrode, ensure your power source output polarity is set to electrode positive before welding. Follow preheat requirements for the applicable base metal and joint configuration per applicable code (API 1104, AWS D1.1) — low hydrogen electrodes require controlled storage (300–350°F / 149–177°C holding oven) to maintain low hydrogen content after opening. Reconditioning per the Lincoln Electric rebaking schedule is required for electrodes exposed to humidity.
Pipeliner LH-D90 is classified to AWS A5.5/A5.5M E9045-P2, where the P2 suffix certifies suitability for pipeline welding per the applicable pipeline welding codes. Lincoln Electric manufactures Pipeliner electrodes under ISO 9001-certified processes with full lot traceability. As a low-hydrogen electrode, Pipeliner LH-D90 is formulated and packaged to control moisture absorption — the Easy Open Can hermetically seals the electrodes until opening to maintain certified hydrogen levels in the field. For applications requiring AWS D1.1 or API 1104 compliance, this electrode’s classification satisfies the low-hydrogen requirement.
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