Haihao Group Ships ASME B16.9 A420 WPL6 Butt Weld Fittings for Russian Low-Temperature Pipeline
Haihao Group has recently wrapped up fabrication and shipment of a batch of heavy-wall butt weld pipe fittings for a Russian pipeline customer. This set of fittings is built from A420 Gr. WPL6 low-temperature carbon steel and fully follows ASME B16.9 dimension rules, selected to stand up to harsh sub-zero field operating conditions.
ASME B16.9 A420 WPL6 butt weld fittings, LR elbow, reducing tee and concentric reducer for Russia low temperature pipeline project
Product Specification Table
| Item | Type | Size & Schedule | Material | Standard | Special Requirement |
| 90° LR Elbow | BW | 3″ SCH XXS (88.9×15.24) | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| 90° LR Elbow | BW | 2″ SCH XXS (60.3×11.07) | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Reducing Tee | BW | 4″×2″ SCH160 × SCHXXS | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Reducing Tee | BW | 3″×2″ SCH XXS | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Concentric Reducer | BW | 4″×3″ SCH160 × SCHXXS | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Concentric Reducer | BW | 3″×2″ SCH XXS | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
| Concentric Reducer | BW | 8″×6″ SCH 160 | A420 Gr. WPL6 | ASME B16.9 | Heat treated, -46°C impact ≥27J avg / ≥22J min |
This order mixes long radius elbows, reducing tees and concentric reducers, with wall schedules including SCH 160 and SCH XXS. Many project engineers pick ASME B16.9 A420 WPL6 butt weld fittings when piping systems must maintain reliable toughness at -46°C. Every piece goes through dedicated heat treatment to stabilise microstructure and lock in impact performance. The mandatory Charpy V-notch test requires a minimum average energy of 27J, with no single specimen dropping below 22J, a strict threshold to stop brittle fracture in cold service.
The supplied sizes cover 2 inch, 3 inch, 4 inch, 6 inch and 8 inch ranges. The 90° long radius elbows carry R=1.5D geometry, which supports steady fluid flow and cuts turbulence and pressure drop inside the line. Reducing tees and concentric reducers match the heavy wall thickness schedule requirements of the adjacent piping, so weld transitions align neatly during site assembly. All dimensional checks, material verification and toughness testing records are compiled into full documentation before packing.
We know cold-region pipeline projects leave little margin for material failure. ASME B16.9 A420 WPL6 butt weld fittings are widely trusted for gas transmission, process and hydrocarbon pipelines in cold climate regions. Our internal inspection team tracks heat treatment curves and impact test reports individually for each lot, instead of relying only on generic mill certificates. This careful control helps our Russian clients meet local construction and safety acceptance requirements without extra delays.
For contractors and EPC teams sourcing heavy-wall low-temperature piping components, consistent impact toughness and precise ASME B16.9 dimensional control are equally important. Haihao Group keeps stable stock and production capacity for A420 WPL6 elbows, tees and reducers across common SCH 160 and SCH XXS wall ratings. If your upcoming cold-service pipeline tender needs LTCS butt weld fittings with certified low-temperature impact values, reach out to our engineering team to discuss drawing review, test package and delivery timelines.