수업 선택 방법 150, 300, 600, 900 또는 1500 플랜지
직접적인 답변
Select flange class by locating the flange material in the applicable ASME pressure-temperature table, then confirming that the allowable pressure at the design temperature meets or exceeds the required design pressure. Also check size limits, 플랜지형, 깃 달기, 틈 메우는 물건, 탈당, piping code and project design margin. 수업 150 does not simply mean 150 psi.
주요 시사점
- Use pressure and temperature simultaneously.
- Use the correct material group and current project-approved standard edition.
- Confirm the entire joint rating; the lowest-rated compatible component governs.
단계 1: define design conditions
Start with design pressure and design temperature, not normal operating values. Include upset, steam-out, regeneration, shutdown and external-fire cases where the design basis requires them. Vacuum or external pressure may introduce separate checks.
The fluid category, cyclic service and leakage consequence can also influence flange type, facing and assembly requirements even when the numerical class is adequate.
단계 2: identify material group and rating table
ASME B16.5 assigns listed materials to groups with pressure-temperature ratings by class. Find the exact ASTM grade and confirm any notes. Do not use a table for A105 when ordering F22 or F91.
Read the edition specified by the project. Online charts may omit notes, use an older edition or apply to a different material.
단계 3: verify size, class and flange configuration
ASME B16.5 covers NPS 1/2 NPS를 통해 24 within defined class ranges. 수업 2500 has a more limited size scope than lower classes. Large-diameter flanges are addressed separately by ASME B16.47.
Then verify weld neck, 슬립온, blind or other type restrictions, the required facing, pipe bore and any project-specific dimensions.
단계 4: check the complete bolted joint
A flange rating does not independently qualify the gasket, 볼트, 견과류, attached pipe or nozzle. Check gasket temperature and chemical compatibility, bolting allowable stress, differential thermal expansion, external loads and assembly method.
Document the selected class in the line list and valve/flange data sheets so all mating components are purchased consistently.
자주 묻는 질문
Does Class 300 mean 300 psi?
아니요. Class is a designation. Allowable pressure varies with material and temperature and must be read from the applicable standard table.
Can a higher-class flange replace a lower-class flange?
Not without review. 치수, 볼트 패턴, 두께, mating equipment, gasket and system design may differ.
Which class is best for F22?
There is no universal best class. It must be selected from the F22 material rating and the project design conditions.
참조된 기본 표준
- ASME B16.5-2025 — 파이프 플랜지 및 플랜지 피팅, NPS 1/2 NPS를 통해 24
- ASME B16.47-2025 — Large Diameter Steel Flanges, NPS 26 NPS를 통해 60
항상 구매 주문서에 명시된 버전을 확인하고 설계 및 승인에 대한 완전한 통제 표준을 확보하십시오..
합금강 플랜지 견적 요청
재료 등급 보내기, 기준, NPS, 압력 등급, 플랜지형, 깃 달기, 파이프 일정, 수량 및 검사 요구 사항. SASA FLANGE 견적 전에 기술 설명을 검토합니다..
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