Beschreibung
Duplex stainless steel forged pipe flange
ASTM A182 F51 Duplex 2205 Vorschweißflansch
A high-integrity WN flange combining the strength and chloride-corrosion resistance of Duplex 2205 with a tapered hub and full-penetration butt-weld connection.
Was ist ein ASTM A182 F51 weld neck flange?
Ein ASTM A182 F51 weld neck flange is a forged Duplex 2205 piping component with a long tapered hub and a butt-weld end. The hub transfers mechanical stress gradually into the pipe, while the full-penetration weld supports demanding pressure, Temperatur, vibration and cyclic-service requirements.
F51 is the ASTM A182 grade associated with UNS S31803 Duplex-Edelstahl. Its ferritic-austenitic microstructure provides higher yield strength than common 300-series austenitic stainless steels and useful resistance to chloride pitting, Spaltkorrosion und Spannungsrisskorrosion. Final suitability depends on temperature, Chloridgehalt, pH-Wert, Herstellung, welding procedure and the governing piping code.
Pictured production item
The product photographs show a 2 in weld neck flange with a Schedule 10 langweilig, manufactured to ASME B16.5, Klasse 150, Flaches Gesicht (FF). The edge marking identifies F51 and S31803/S32205, and the PMI photograph documents an on-site alloy identification check.
Photographs document this production item only. Each order is manufactured and accepted against the purchase order, genehmigte Zeichnung, applicable standard and material certificate.
F51 Duplex 2205 WN flange specifications
| Produkttyp | Forged Weld Neck flange / WN / WNRF / WNRTJ / WNFF |
|---|---|
| ASTM-Klasse | ASTM A182 F51 |
| UNS designation | UNS S31803; UNS S32205 only where the ordered chemistry, mechanical properties and certification support it |
| Maßstandards | ASME B16.5; ASME B16.47 für anwendbare große Durchmesser; EN 1092-1 Typ 11 auf Anfrage |
| Nenngröße | NPS 1/2 durch NPS 24 unter ASME B16.5; larger sizes and EN dimensions subject to specification review |
| Druckklasse | ASME-Klasse 150, 300, 400, 600, 900, 1500 Und 2500 within the type and size limits of the selected standard |
| Gegenüber | Erhöhtes Gesicht (RF), Ringgelenk (RTJ), Flaches Gesicht (FF) oder zeichnungsspezifische Verkleidung |
| Bohrung und Schweißende | Machined for the ordered pipe OD, wall schedule and weld preparation |
| Typical documentation | EN 10204 3.1 MTC, Rückverfolgbarkeit der Schmelzenzahl, dimensional report and PMI report |
| Optionale Inspektion | PT, UT, Ferritprüfung, Korrosionsprüfung, third-party inspection and additional project tests when ordered |
Abmessungen, Druck-Temperatur-Werte, test requirements and acceptance criteria follow the ordered standard edition, material specification and project documents.
F51, S31803 and S32205: how should they be specified?
| Designation | Bedeutung der Beschaffung | RFQ guidance |
|---|---|---|
| ASTM A182 F51 | Forged duplex grade associated with UNS S31803 | State F51 and the required UNS designation on the purchase order |
| UNS S31803 | Original 2205 composition range with broader nitrogen and alloy limits | Use when the project specifically calls for S31803/F51 |
| UNS S32205 | Enger 2205 chemistry commonly ordered under ASTM A182 F60 | Specify F60/S32205 or an approved dual-certified requirement rather than assuming equivalence |
Typische Anwendungen
Prozesskufen, produced-water systems, utility lines and selected corrosive streams.
Seawater auxiliaries, fire-water systems and equipment connections under approved design conditions.
Entsalzung, brackish-water, filtration and high-chloride treatment systems.
Piping exposed to chloride-bearing water and selected process chemicals.
Herstellung, Inspektion und Rückverfolgbarkeit
Production can include controlled forging, Lösungsglühen, CNC-Bearbeitung, Bohren, gasket-face finishing, Reinigung, marking and final inspection. Für Duplex-Edelstahl, material identity and heat-treatment control are important because chemistry alone does not confirm the required phase balance or mechanical performance.
Heat-number traceability, MTC review and PMI as specified.
VON, Dicke, Nabe, langweilig, Lochkreis, bolt holes and facing.
Ferrit, corrosion or additional metallurgical testing when ordered.
EN 10204 3.1 certificate and project inspection records.
Information needed for quotation
- ASTM-Klasse und UNS-Bezeichnung
- Maßstandard und Ausgabe
- Nennrohrgröße
- Druckklasse oder PN-Bewertung
- Pipe schedule and bore
- Art und Ausführung der Verkleidung
- Menge und Lieferort
- Testen, certification and inspection
Häufig gestellte Fragen
Ist ASTM A182 F51 a super duplex grade?
NEIN. F51/S31803 is normally classified as Duplex 2205. Super duplex usually refers to higher-alloy grades such as ASTM A182 F53/UNS S32750 or F55/UNS S32760. The product must be described by its exact ASTM and UNS designation.
Are S31803 and S32205 the same material?
Both are commonly called Duplex 2205, but S32205 has tighter chemistry limits and is commonly associated with ASTM A182 F60. A dual-certified flange must satisfy the chemistry, mechanical and certification requirements stated in the purchase order.
Which ASME sizes and classes can be supplied?
ASME B16.5 covers weld neck flanges from NPS 1/2 durch NPS 24 across the pressure classes and size limits defined by the standard. ASME B16.47 options can be reviewed for applicable larger diameters.
Can the flange bore match a specific pipe schedule?
Ja. The bore and weld end are machined to the ordered pipe OD and wall schedule. Include the pipe specification, schedule and any required transition detail in the RFQ.
Welche Prüfbelege liegen vor??
Eine typische Dokumentation umfasst eine EN 10204 3.1 Materialzertifikat, Rückverfolgbarkeit der Schmelzenzahl, dimensional report and PMI report. PT, UT, Ferrit, corrosion testing and third-party inspection can be arranged when specified before manufacture.
Fordern Sie eine Maisonette an 2205 weld neck flange quotation
Send the grade, UNS designation, Größe, Klasse, Zeitplan, gegenüber, quantity and inspection requirements for a specification review and project quotation.
