Flanş Tipi	Pressure Capability	Ortak Kullanım
Kaynak Boyunlu	Yüksek	Yüksek basınç, high-temp pipelines
Slip-On	Ilıman	General low-pressure systems
Soket Kaynağı	Yüksek (small bore)	Small-diameter high-pressure lines
Kör	Çok yüksek	System termination points
Kucak Bağlantısı	Low to moderate	Non-critical, dismantling needed
Dişli	Düşük	Low-pressure, no-weld applications

Yüksek basınçlı sistemler için, weld neck or socket weld flanges are typically selected.

Sasaflance 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 sızdırmazlık performansı is also influenced by the type of gasket used and the bolt load that the flange can handle. High-pressure classes generally require:

• Metalik contalar (sarmal yara, 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:

• Yükseltilmiş Yüz (RF)

• Halka Tipi Bağlantı (RTJ)

• Düz Yüz (FF)

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

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6. Pipeline Media and Corrosion Conditions

The nature of the fluid or gas transported also impacts flange selection. Corrosive or aggressive media (such as acids, tuzlu su, high-pressure steam, veya hidrokarbonlar) 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 uyumluluk for sour service in oil & gaz

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

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7. Çevre Koşulları

Beyond internal conditions, the dış çevre can also influence the longevity and pressure performance of the flange:

• Açık deniz platformları 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 Bölüm VIII basınçlı kaplar için

• EN 13480 for European industrial piping

• PED, NORVEÇ, API, ve ISO standartları for regional or industry-specific compliance

These codes define:

• Allowable stress values

• Flange design verification

• Pressure test protocols

• Inspection and documentation requirements

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

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9. Future Expansion or Modification

When designing a pipeline, dikkate almak future changes in system pressure, flow rate, veya sıcaklık. 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 veya limited availability. For urgent projects, choosing a more readily available pressure class can ensure timely delivery.

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

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Çözüm

Selecting the right pressure rating for a connecting flange requires a comprehensive understanding of system pressure, sıcaklık, medya, malzeme özellikleri, and applicable standards. Overlooking even one factor can lead to system failure, güvenlik tehlikeleri, or compliance issues.

When in doubt, always consult pressure-temperature rating tables, design engineers, or your flange supplier. A well-chosen flange ensures the long-term safety and efficiency of the piping system.

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