Comparación entre brida deslizante y brida soldada Guía de acero aleado de alta presión

Slip On vs Weld Neck Flange Complete Comparison

Choosing between slip on and weld neck flanges depends on pressure requirements, budget constraints, and application specifics. This guide helps you make the right selection for your industrial pipeline.

Structural Differences

Slip On Flange Design

• Flat hub with slightly larger bore than pipe OD
• Slides over pipe end for fillet welding
• Welded on both inside and outside
• Proceso de fabricación más sencillo

Weld Neck Flange Design

• Cubo cónico largo para soldadura a tope
• Gradual stress transition from flange to pipe
• Full penetration weld for maximum strength
• More complex forging and machining

Performance Comparison

Factor	Deslizante	Cuello de soldadura
Coste inicial	30-40% inferior	Higher
Installation Cost	Lower (easier alignment)	Higher (welding skill)
Presión nominal	Medium (Class 150-600)	High (Class 150-2500)
Resistencia a la fatiga	Moderado	Excelente
Temperatura	-20 to 400°C	-200 to 800°C
Carga cíclica	No recomendado	Excelente

High Pressure Alloy Steel Flanges

For extreme pressure and temperature applications, alloy steel flanges provide superior performance.

Common Alloy Materials

• ASTM A182 F11: 1.25% Chrome, 0.5% Moly
• ASTM A182 F22: 2.25% Chrome, 1% Moly
• ASTM A182 F91: 9% Chrome, 1% Moly, V, Nb
• ASTM A335 P5: 5% Chrome, 0.5% Moly

Aplicaciones

• Power generation steam lines
• Petrochemical refineries
• High-pressure boilers
• Superheater and reheater piping
• Hydrogen service

Clases de presión

• Clase 600: hasta 110 bar
• Clase 900: hasta 165 bar
• Clase 1500: hasta 276 bar
• Clase 2500: hasta 460 bar

Flange Fitting for Water Treatment Plants

Water treatment facilities have specific flange requirements:

Selección de materiales

• Acero al carbono (A105): Raw water, treated water
• Stainless 304: Clean water, food grade
• Stainless 316: Chlorinated water, seawater
• Duplex 2205: Aggressive chemicals

Common Sizes

• Small bore: DN15-DN50 (instrumentation)
• Process lines: DN80-DN300
• Main headers: DN350-DN600
• Large diameter: DN700+ (outfall)

Brida con servicio de perforación para petróleo y gas

Custom drilling patterns ensure compatibility with existing infrastructure:

Standard Drilling Patterns

• ASME B16.5: US standard
• EN 1092-1: Norma europea
• JIS B2220: Japanese standard
• GB/T: Chinese standard

Custom Drilling Services

• Non-standard bolt circles
• Oversized bolt holes
• Additional tapping
• Counterboring
• Special gasket grooves

Brida roscada para tubos de pequeño diámetro

Threaded flanges offer weld-free connection for small diameter piping:

Ventajas

• No requiere soldadura
• Quick installation
• Fácil acceso para el mantenimiento
• Suitable for hazardous areas

Limitaciones

• Limitado a NPS 4 e inferiores
• Lower pressure rating
• Riesgo de corrosión de la rosca
• No para ciclos térmicos

Hilo Normas

• NPT (ANSI B1.20.1): North American
• BSP (ISO 228): European/Asian
• PT (JIS B0203): Japanese

Servicio de reparación y mecanizado de bridas

When flanges are damaged or require modification:

Repair Services

• Face resurfacing
• Bore machining
• Bolt hole repair
• Weld overlay
• Tratamiento térmico

Quality Verification

• Control dimensional
• Pruebas de dureza
• Surface finish measurement
• Pressure testing

Selection Guidelines

Elija Slip On Cuando:

• El presupuesto es la principal preocupación
• Presión baja a media (Clase 150-300)
• Aplicaciones no críticas
• Fácil acceso para mantenimiento

Elija cuello de soldadura cuando:

• Alta presión o temperatura
• Condiciones de carga cíclica
• Líneas de proceso críticas
• Se requiere fiabilidad a largo plazo

Songhai Flange supplies slip on, weld neck, and threaded flanges in carbon steel, stainless steel, and alloy materials. We offer custom drilling, machining, and repair services for oil and gas, water treatment, and industrial applications.

WhatsApp: +86-18658777855
Correo electrónico: 1007788887@qq.com