Descrição
Duplex stainless steel forged pipe flange
ASTM A182 F51 Duplex 2205 Flange de pescoço soldado
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.
O que é um ASTM A182 F51 weld neck flange?
Um 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, temperatura, vibration and cyclic-service requirements.
F51 is the ASTM A182 grade associated with UNS S31803 duplex em aço inoxidável. Its ferritic-austenitic microstructure provides higher yield strength than common 300-series austenitic stainless steels and useful resistance to chloride pitting, corrosão em frestas e fissuras por corrosão sob tensão. Final suitability depends on temperature, nível de cloreto, pH, fabricação, welding procedure and the governing piping code.
Pictured production item
The product photographs show a 2 in weld neck flange with a Schedule 10 chato, manufactured to ASME B16.5, Aula 150, Rosto plano (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, desenho aprovado, applicable standard and material certificate.
F51 Duplex 2205 WN flange specifications
| Tipo de produto | Forged Weld Neck flange / WN / WNRF / WNRTJ / WNFF |
|---|---|
| Grau ASTM | ASTM A182 F51 |
| Designação dos EUA | UNS S31803; UNS S32205 only where the ordered chemistry, mechanical properties and certification support it |
| Padrões dimensionais | ASME B16.5; ASME B16.47 para grandes diâmetros aplicáveis; EN 1092-1 Tipo 11 a pedido |
| Tamanho nominal | NPS 1/2 através do NPS 24 sob ASME B16.5; larger sizes and EN dimensions subject to specification review |
| Classe de pressão | Classe ASME 150, 300, 400, 600, 900, 1500 e 2500 within the type and size limits of the selected standard |
| Enfrentando | Rosto levantado (RF), Junta tipo anel (RTJ), Rosto plano (FF) ou revestimento específico do desenho |
| Furo e extremidade de solda | Machined for the ordered pipe OD, wall schedule and weld preparation |
| Typical documentation | EN 10204 3.1 CTM, rastreabilidade do número de calor, dimensional report and PMI report |
| Inspeção opcional | PT, UT, verificação de ferrite, testes de corrosão, third-party inspection and additional project tests when ordered |
Dimensões, classificações de pressão-temperatura, 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 | Significado de aquisição | 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 | Tighter 2205 chemistry commonly ordered under ASTM A182 F60 | Specify F60/S32205 or an approved dual-certified requirement rather than assuming equivalence |
Aplicações típicas
Deslizamentos de processo, produced-water systems, utility lines and selected corrosive streams.
Seawater auxiliaries, fire-water systems and equipment connections under approved design conditions.
Dessalinização, brackish-water, filtration and high-chloride treatment systems.
Piping exposed to chloride-bearing water and selected process chemicals.
Fabricação, inspeção e rastreabilidade
Production can include controlled forging, tratamento térmico em solução, Usinagem CNC, perfuração, gasket-face finishing, limpeza, marking and final inspection. Para aço inoxidável duplex, material identity and heat-treatment control are important because chemistry alone does not confirm the required phase balance or mechanical performance.
Rastreabilidade do número de calor, MTC review and PMI as specified.
DE, grossura, eixo, chato, círculo de parafuso, bolt holes and facing.
Ferrite, corrosion or additional metallurgical testing when ordered.
EN 10204 3.1 certificate and project inspection records.
Information needed for quotation
- Grau ASTM e designação UNS
- Padrão dimensional e edição
- Nominal pipe size
- Classe de pressão ou classificação PN
- Pipe schedule and bore
- Tipo de revestimento e acabamento
- Quantidade e destino de entrega
- Teste, certification and inspection
Perguntas frequentes
É ASTM A182 F51 a super duplex grade?
Não. 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 através do 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?
Sim. 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.
Quais documentos de inspeção estão disponíveis?
A documentação típica inclui um EN 10204 3.1 certificado de material, rastreabilidade do número de calor, dimensional report and PMI report. PT, UT, ferrita, corrosion testing and third-party inspection can be arranged when specified before manufacture.
Solicite um Duplex 2205 weld neck flange quotation
Send the grade, Designação dos EUA, tamanho, aula, agendar, enfrentando, quantity and inspection requirements for a specification review and project quotation.
