Pipe Connection Flange of Welded Neck Nickel Alloy 625/825 for Oil&Gas
| Commodity : Welding Neck , Blind , Slip On , Lap Joint , Socket Weld , Threaded , Spectacle Blind , etc |
| Surfacing : RF , FF , RTJ |
| Materials :UNS N06625 , N06600 , N06601 , N07718 , N10276 , N0800 , N08825 , N04400 ; etc. |
| Standards : ASTM B564 ,ASTM B637, ASTM B462 etc |
| Tolerances : According to the specification or customer’s request and drawings |
| Applications : Pipe connection , Piping project construction etc |
| Pressure class : PN20-PN420 |
Weld Neck Flange:
Weldneck flange bore is machined to match the ID of the pipe or fitting. This creates a smooth transition to and from the weld neck flange and prevents turbulence at the welding neck. Hence it is important to specify the pipe schedule at the time of buying a weld neck flange.
UNS | Alloy | Scope (mm) | |||
Seamless pipe &tube | Welded pipe & tube | Fitting/ Flange | Sheet, Plate, Strip | ||
UNS N06625 | ALLOY 625 | OD: 4.5-355mm WT: 0.7-20mm L: 0-12000mm | OD: 17.1-914.4mm; WT: 1-36mm; L：<12000mm | DN15-DN600 | Plate: WT<6mm, WDT<1200mm, L<3000mm; WT>6mm, WDT<2800mm, L<8000mm Coil: WT:0.15-3mm WDT:<1000mm |
Nickel Alloy 625 Chemical Composition:
% | Ni | Cr | Mo | Fe | C | Mn | Si | P | S | Co | Nb+Ta | Al | Ti |
min | 58.0 | 20.0 | 8.0 | 3.15 | |||||||||
max | 23.0 | 10.0 | 5.0 | 0.10 | 0.50 | 0.50 | 0.015 | 0.015 | 1.00 | 4.15 | 0.40 | 0.40 |
Features: Alloy 625 has excellent strength at temperatures up to 816℃. At higher temperatures, its strength is generally lower than that of other solid solution strengthened alloys. Alloy 625 has good oxidation resistance at temperatures up to 980℃ and shows good resistance to aqueous corrosion, but is relatively moderate compared to other more capable corrosion resistant alloys.
Applications: Chemical process industry and sea water application. Alloy 625 is used in short term applications at temperatures up to 816℃. For long term service, it is best restricted to a maximum of 593℃, because long term exposure above 593℃ will result in significant embrittlement.