플랜지 유형	Pressure Capability	Common Use
용접 목	높은	고압, high-temp pipelines
슬립온	보통의	General low-pressure systems
소켓 용접	높은 (small bore)	Small-diameter high-pressure lines
눈이 먼	매우 높음	System termination points
랩조인트	낮음~보통	Non-critical, dismantling needed
스레드	낮은	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.

---

5. Gasket Type and Bolt Load

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

• 금속 개스킷 (spiral wound, 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:

• 제기된 얼굴 (RF)

• 링형 조인트 (RTJ)

• 편평한 얼굴 (FF)

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

---

6. Pipeline Media and Corrosion Conditions

그만큼 nature of the fluid or gas transported also impacts flange selection. Corrosive or aggressive media (such as acids, 바닷물, high-pressure steam, or hydrocarbons) can degrade flange material, reducing its pressure resistance over time.

고려하다:

• Stainless steel or nickel alloy flanges for aggressive fluids

• Corrosion allowances and lining options for carbon steel flanges

• NACE MR0175 규정 준수 for sour service in oil & 가스

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

---

7. 환경 조건

Beyond internal conditions, 그만큼 외부 환경 can also influence the longevity and pressure performance of the flange:

• 해양 플랫폼 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.

---

8. System Design Codes and Regulatory Compliance

Flanges must comply with project-specific and regional codes:

• ASME B31.3 for process piping

• ASME 섹션 VIII for pressure vessels

• EN 13480 for European industrial piping

• 소아과, 노르웨이, API, ISO 표준 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, 유타, and pressure test reports.

---

9. Future Expansion or Modification

When designing a pipeline, 고려하다 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.

---

10. Availability and Lead Time

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

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

---

결론

Selecting the right pressure rating for a connecting flange requires a comprehensive understanding of system pressure, 온도, media, material properties, and applicable standards. Overlooking even one factor can lead to system failure, 안전 위험, or compliance issues.

의심스러울 때, 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, SASAFLANGE is your trusted partner for selecting and supplying the correct pressure-rated flanges for any project.