| Customization: | Available |
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| After-sales Service: | as Per Client′s Design |
| Warranty: | 1 Years |
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Item
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Details
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Nominal Pipe Size (NPS)
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Ranging from 1/2 to 24, providing a comprehensive selection to meet diverse marine piping system requirements.
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Outer Diameter (OD)
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Precise measurements are specified for each NPS, ensuring a perfect fit with pipes of corresponding sizes. The OD values are consistent with industry - standard pipe dimensions, enabling seamless integration into existing or new marine piping systems.
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Thickness
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Engineered with appropriate thicknesses for different pressure classes and NPS. Thicker flanges are available for higher - pressure applications, guaranteeing structural integrity and leak - proof performance under extreme conditions.
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Bolt Circle Diameter (BCD)
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Clearly defined BCDs for each NPS and pressure class. This ensures proper alignment and even distribution of bolt loads, enhancing the overall strength and stability of the flanged connections.
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Number of Bolts
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Standardized number of bolts based on NPS and pressure class, providing a secure and reliable fastening method. The bolts are evenly spaced around the flange, minimizing the risk of uneven stress distribution.
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Pressure Class
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Description
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150#
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Suitable for low - to - moderate pressure applications in marine systems, such as non - critical water lines, ventilation ducts, and some general - purpose piping.
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300#
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Offers higher pressure - handling capabilities, making it suitable for medium - pressure applications, including many hydraulic systems, compressed air lines, and some fuel lines.
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400#
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Designed for specific medium - to - high - pressure applications where a balance between pressure resistance and cost - effectiveness is required.
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600#
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Capable of withstanding high - pressure conditions, commonly used in critical marine systems, such as high - pressure steam lines, certain chemical transfer lines, and some offshore oil and gas applications.
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900#
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Engineered for extremely high - pressure applications, providing maximum strength and reliability. Ideal for high - pressure fluid transfer and other demanding marine operations.
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1500#
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The highest pressure class in this standard, suitable for ultra - high - pressure applications, such as deep - sea oil and gas exploration and production systems, where exceptional strength and leak - tightness are crucial.
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The pressure-temperature rating is the maximum allowable working pressure (bar unit) of the material and grade used at the rated temperature (Celsius).
Whether flange joints are used at high or low temperatures, leakage due to external forces and moments generated by the connected piping or equipment should be considered. To prevent leakage, pipe flanges and flanged fittings should avoid the application of severe external loads and sharp thermal gradients.
Application at temperatures in the creep range will result in decreasing bolt loads as relaxation of flanges, bolts, and gaskets takes place. Flanged joints subjected to thermal gradients may likewise be subject to decreasing bolt loads. Decreased bolt loads diminish the capacity of the flanged joint to sustain loads effectively without leakage. At temperatures above 200°C (400°F) for Class 150 and above 400°C (750°F) for other class designations, flanged joints may develop leakage problems unless care is taken to avoid imposing severe external loads, severe thermal gradients, or both.
Some materials, especially some carbon steel materials, exhibit a significant decrease in ductility when used at low temperatures, and thus cannot withstand impact load, sudden stress changes, and high stress concentrations. Some regulations require an impact test even when the temperature is above -29 °C (−20°F).
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