ASME B16.9 A420 WPL6 Butt Weld Tees and Elbows Shipped to Russian Cold Climate Pipeline
Piping layouts for Russian northern pipeline sites often combine tees and multi-angle elbows matched to the same low-temperature material specification, so impact toughness stays consistent across the whole spool. Haihao Group recently finished production and shipment of a set of ASME B16.9 A420 WPL6 butt weld fittings, including equal tees, reducing tees, 90° and 45° long radius seamless elbows for this Russian project.
ASME B16.9 A420 WPL6 butt weld equal tee, reducing tee, 45° and 90° long radius elbows for Russia cold pipeline project
Product Specification Table
| Item | Type | Size & Schedule | Wall Dimensions | Material | Standard | Special Requirement |
| Reducing Tee | BW Reducing Tee | 6″×4″ SCH XS/80 | 168.3×10.97 – 114.3×8.56 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Equal Tee | BW Equal Tee | 6″ SCH XS/80 | 168.3×10.97 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| 90° LR Elbow | BW LR Elbow | 3″ SCH XS/80 | 88.9×7.62 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| 90° LR Elbow | BW LR Elbow | 4″ SCH XS/80 | 114.3×8.56 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| 90° LR Elbow | BW LR Elbow | 6″ SCH XS/80 | 168.3×10.97 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| 45° LR Elbow | BW LR Elbow | 3″ SCH XS/80 | 88.9×7.62 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
Every ASME B16.9 A420 WPL6 butt weld fitting in this batch is built for -46°C service, with controlled heat treatment applied to stabilise grain structure and meet strict Charpy acceptance values: average impact energy 27J, with no single test piece falling below 22J. This toughness threshold guards against brittle fracture, a critical risk for carbon steel piping exposed to sustained sub-zero operating temperatures.
The tee scope covers a 6 inch equal tee and a 6″×4″ reducing tee, both at SCH XS / 80 wall thickness. Pairing equal and reducing tees in the same material grade simplifies site welding and inspection, as the welder and QA team work with one consistent LTCS alloy. Complementing the tees, the long radius elbows include 3″, 4″, 6″ 90° LR units plus a 3″ 45° LR seamless elbow. All elbows follow 1.5D long radius geometry, which minimises flow turbulence and pressure loss in process lines.
Dimensional marking and material traceability received careful checks before packing. Each ASME B16.9 A420 WPL6 butt weld fitting carries permanent stamping of heat number, size, schedule and grade. The full material test package groups impact test records separately, so the client’s third-party inspector can quickly validate the low-temperature requirement without sorting mixed documentation.
Many EPC teams working on Russian cold-region projects prefer consolidated fitting packages, where elbows and tees share one material and test specification. Sourcing ASME B16.9 A420 WPL6 butt weld fitting elbows and tees from a single supplier reduces mismatches and cuts down separate inspection overhead. Haihao Group fabricates these seamless butt weld components to tight ASME B16.9 dimensional tolerances and can support witness testing for low-temperature impact batches.
If your upcoming cold service pipeline tender requires matching LTCS elbows and tees with certified -46°C Charpy results, send your schedule to our piping engineering team to lock in lead time and inspection scope.