ASME B16.5 合金鋼フランジの寸法と圧力クラス
直接の答え
ASME B16.5 defines pressure-temperature ratings, 寸法, 公差, 材料, marking and testing for pipe flanges and flanged fittings from NPS 1/2 NPSを通じて 24. It includes Classes 150, 300, 400, 600, 900 そして 1500 across applicable sizes, with Class 2500 limited to NPS 1/2 NPSを通じて 12.
重要なポイント
- Material specification and dimensional standard must both appear on the order.
- The bore of a weld neck flange must be specified to match the pipe wall.
- Do not scale dimensions from a drawing or substitute B16.47 dimensions for B16.5.
Dimensions controlled by ASME B16.5
Depending on flange type, the standard controls outside diameter, 厚さ, hub dimensions, bolt-circle diameter, bolt-hole quantity and size, facing geometry and other details. Weld neck flanges additionally require attention to bore and weld-end configuration.
Tolerances matter. A nominal dimension from a catalogue is not a manufacturing inspection plan; use the standard and project drawing for acceptance.
Size and class scope
| Item | ASME B16.5 scope summary |
|---|---|
| 呼び径 | NPS 1/2 NPSを通じて 24 |
| Classes | 150, 300, 400, 600, 900 そして 1500 within applicable size ranges |
| クラス 2500 | NPS 1/2 NPSを通じて 12 |
| 材料 | Cast or forged flanges; specified blind/reducing configurations may use permitted plate material |
| Joint details | Includes requirements and recommendations for bolting, gaskets and flange joints |
Material and dimensions are separate decisions
「ASTM A182 F22” defines a material grade; 「ASME B16.5 クラス 600 WNRF” defines a dimensional and rating configuration. Neither statement alone creates a complete flange specification.
Add NPS, 直面している, pipe schedule/bore, 表面仕上げ, standard edition and inspection documents. For RTJ flanges, include the correct ring groove designation.
Dimensional inspection before shipment
A useful report records critical dimensions against specified nominal values and tolerances. Inspection typically covers OD, 厚さ, ハブ, ボア, ボルトサークル, holes, facing and overall height. Calibrated equipment and drawing revision should be identified.
For replacement flanges, the buyer should provide an approved field measurement or equipment drawing. Corroded samples can conceal the original facing height or edge profile, so reverse engineering from a worn component requires engineering judgement and should not be treated as a standard catalogue order.
Protect sealing faces and weld ends after final inspection so packing and transport do not invalidate the accepted condition.
よくある質問
する ASME B16.5 cover NPS 30 フランジ?
いいえ. ASME B16.47 addresses large-diameter steel flanges from NPS 26 NPSを通じて 60.
Is the bore fixed by pressure class?
Not by class alone. Weld neck bore selection must account for the specified pipe outside diameter and wall thickness.
Are Class 300 とクラス 600 bolt patterns interchangeable?
Do not assume so. Use the exact dimensional table for the size, class and facing.
参照される主な規格
発注書で指定されたエディションを常に確認し、設計と承認に関する完全に管理された基準を取得してください。.
合金鋼フランジの見積もりをリクエストする
材料グレードを送信します, 標準, NPS, 圧力クラス, フランジタイプ, 直面している, パイプスケジュール, 数量と検査要件. SASA FLANGE 見積もりの前に技術的な説明を確認します.
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