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商品の詳細:
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| 製品名: | ルーズフランジ | 鋼種: | デュプレックスステンレス鋼 |
|---|---|---|---|
| サイズ: | std | フランジを向き: | 上げられた表面 |
| パッキング: | 顧客の要求としてpalletsor | セクションの形状: | ラウンド |
| ストレス: | 900# | 厚さ: | シュ40-シュ160 |
| 標準: | ASME、ANSI、DIN、JIS | 使用法: | オイル/水 |
| 形: | 丸、正方形、長方形、楕円形など。 | 耐食性: | 高い |
| 表面処理: | CNCは機械で造った | テクニクス: | 鋳造 |
| 支払い: | T/T、L/C | 加圧: | 150#から2500# |
| ハイライト: | ASME B16.5 loose flange,Class 150 alloy steel flange,cost-effective loose flange |
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Easy Alignment Cost Effective Loose flange ASMEB16.5 Class150
A Loose Flange, also known as a lap joint flange or loose flange, is not fixed directly to the pipe but is instead loose and slides over the pipe . It typically partners with a stub end (a welded collar or a lap ring), which is first welded or otherwise attached to the pipe. The loose flange then bolts this assembly to a mating flange, but it does not take the pressure load itself; its primary role is to facilitate connection and alignment .
This design offers several key advantages:
Material Savings: The flange itself can be made from a different, often less expensive material (like carbon steel) than the stub end, which can be a costly corrosion-resistant alloy like stainless steel, copper, or aluminum .
Ease of Alignment: Since the flange can rotate freely around the pipe, it is much easier to align bolt holes during installation, especially in tight spaces or with large-diameter pipes .
Ease of Maintenance and Inspection: It is well-suited for systems that require frequent disassembly for cleaning, inspection, or maintenance .
Suitability for Corrosive Media: By using a stub end made of corrosion-resistant material, the flange is ideal for pipelines carrying corrosive fluids .
The design and manufacturing of loose flanges are governed by various international and national standards. Key parameters include:
| Parameter | Details & Examples |
|---|---|
| Pressure Ratings (PN) | Common ratings for PN-marked flanges include PN2.5, PN6, PN10, PN16 , and can go up to PN40 or even higher for specific types. |
| Pressure Ratings (Class) | Common ratings for Class-marked flanges include Class 150, Class 300, Class 600 , up to Class 2500 . |
| Size Range (DN) | Available in a wide range of nominal diameters, from as small as DN 10 up to DN 2000 or larger. |
| Materials | Flange rings are commonly made from carbon steel (e.g., Q235, Q255) , stainless steel , and low-alloy steel. Stub ends can match the pipe material, including copper alloys and aluminum . |
| Common Standards | Key standards include GB/T 9118-2010 (for weld-neck loose flanges), GB/T 9121-2010 (for plate-collar loose flanges), and GB/T 9122-2010 (for lapped loose flanges) . Other standards like ASME B16.5 and DIN are also widely used . |
| Temperature Range | Varies by material and standard. For example, copper alloy loose flanges per GB/T 15530.5 are rated for temperatures up to 200°C , while CB/T 4212-2013 for Class A loose flanges allows up to 450°C . |
| Sealing Face Types | Common types include Raised Face (RF) , Male-Female Face (MF), Tongue-Groove Face (TG), and Ring-Type Joint (RJ) . |
Loose flanges are versatile components used across numerous industries, particularly where ease of assembly, maintenance, or corrosion resistance is important:
Corrosive Media Pipelines: They are highly suitable for transporting corrosive substances . The stub end in contact with the fluid can be made from corrosion-resistant materials like stainless steel, copper, or aluminum, while the flange itself can be made from carbon steel, offering a cost-effective solution .
Systems Requiring Frequent Disassembly: Ideal for pipelines and equipment that need regular inspection, cleaning, or maintenance, such as in food processing, pharmaceuticals, and chemical plants . Their rotatable design makes bolt alignment during re-assembly straightforward .
Non-Weldable Pipes: Used with pipes made of materials that are difficult to weld, such as plastic pipes or glass reinforced plastic (GRP) pipes, where the stub end provides a reliable connection point .
Broad Industrial Use: They are widely applied in:
Shipbuilding: Used in various shipboard systems .
Petrochemical and Oil Refining: For various process and utility lines .
Power Generation: In systems requiring isolation for maintenance .
Water Treatment and Public Utilities: For water supply and wastewater management .
Construction, HVAC, and Plumbing: For water, heating, and ventilation systems .
I hope this structured overview helps you understand loose flanges better. Should you have more specific questions regarding a particular standard, material, or application scenario, feel free to ask.
コンタクトパーソン: Andrew
