Tipo de brida	Pressure Capability	Uso común
Cuello de soldadura	Alto	alta presion, high-temp pipelines
Sin cordones	Moderado	General low-pressure systems
Soldadura por enchufe	Alto (small bore)	Small-diameter high-pressure lines
Ciego	muy alto	System termination points
Junta de regazo	Bajo a moderado	Non-critical, dismantling needed
roscado	Bajo	Low-pressure, no-weld applications

For high-pressure systems, weld neck or socket weld flanges are typically selected.

Sasaflange offers all standard flange types, machined and tested to meet pressure design conditions.

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5. Gasket Type and Bolt Load

The flange’s rendimiento de sellado is also influenced by the type of gasket used and the bolt load that the flange can handle. High-pressure classes generally require:

• Juntas metálicas (herida en espiral, RTJ)

• Higher bolt torque

• Greater flange thickness and strength

Ensure that the gasket material and geometry are compatible with the flange face finish and pressure class.

Common flange faces include:

• cara levantada (RF)

• Junta tipo anillo (RTJ)

• Cara plana (FF)

Sasaflange provides matching gasket sets and bolting specifications for their pressure-rated flange assemblies.

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6. Pipeline Media and Corrosion Conditions

El nature of the fluid or gas transported also impacts flange selection. Corrosive or aggressive media (such as acids, de agua salada, high-pressure steam, o hidrocarburos) can degrade flange material, reducing its pressure resistance over time.

Consider:

• Stainless steel or nickel alloy flanges for aggressive fluids

• Corrosion allowances and lining options for carbon steel flanges

• NACE MR0175 cumplimiento for sour service in oil & gas

Sasaflange provides material compatibility recommendations based on specific pipeline fluids and service conditions.

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7. Condiciones ambientales

Beyond internal conditions, el ambiente externo can also influence the longevity and pressure performance of the flange:

• Plataformas marinas require high-grade stainless or duplex flanges

• Outdoor exposure demands UV and corrosion-resistant coatings

• Cryogenic environments need low-temperature impact-tested flanges (A350 LF2)

Temperature differentials, salt exposure, and humidity can cause flange degradation if not considered in material and pressure class selection.

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8. System Design Codes and Regulatory Compliance

Flanges must comply with project-specific and regional codes:

• ASME B31.3 for process piping

• ASME Sección VIII para recipientes a presión

• EN 13480 for European industrial piping

• DEP, NORUEGA, API, y normas ISO for regional or industry-specific compliance

These codes define:

• Allowable stress values

• Flange design verification

• Pressure test protocols

• Inspection and documentation requirements

Sasaflange supplies pressure-rated flanges with full documentation packages, including EN10204 3.1/3.2, PMI, Utah, and pressure test reports.

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9. Future Expansion or Modification

When designing a pipeline, considerar future changes in system pressure, flow rate, or temperature. If the system may undergo upgrades, it’s safer to choose a higher pressure class flange from the outset.

A slightly higher upfront cost can prevent expensive rework or system downtime later.

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10. Availability and Lead Time

Some pressure classes or material combinations may have longer lead times o limited availability. For urgent projects, choosing a more readily available pressure class can ensure timely delivery.

Sasaflange maintains a large stock of Class 150 a 900 and PN10 to PN64 flanges in common sizes and materials for rapid dispatch.

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Conclusión

Selecting the right pressure rating for a connecting flange requires a comprehensive understanding of system pressure, temperatura, medios de comunicación, material properties, and applicable standards. Overlooking even one factor can lead to system failure, peligros de seguridad, or compliance issues.

En caso de duda, always consult pressure-temperature rating tables, design engineers, or your flange supplier. A well-chosen flange ensures the long-term safety and efficiency del sistema de tuberías.

With certified manufacturing, expert engineering, and global supply capabilities, Sasaflange is your trusted partner for selecting and supplying the correct pressure-rated flanges for any project.