Class 150 flanges are standardized piping components with dimensions specified in millimeters (mm) under ANSI B16․5 and ASME B16․47 standards, ensuring precise measurements for industrial applications․
1․1 Overview of Class 150 Flanges
Class 150 flanges are widely used in piping systems, offering a robust and reliable connection․ They are manufactured in various materials, including stainless steel, carbon steel, and alloy steel, adhering to ANSI B16;5 and ASME B16․47 standards․ These flanges are available in multiple types, such as Welding Neck, Socket Weld, Slip-On, and Blind, ensuring versatility for different industrial applications․ Their dimensions in millimeters (mm) are precisely specified to ensure compatibility and safety in high-pressure systems․
1․2 Importance of Accurate Dimensions in MM
Accurate Class 150 flange dimensions in millimeters are critical for ensuring proper fitment, safety, and system integrity․ Precise measurements prevent leakage, misalignment, and potential failure under pressure․ Adherence to standards like ANSI B16․5 and ASME B16․47 ensures compatibility and reliability, making accurate dimensions essential for maintaining high-performance piping systems․
1․3 Purpose of the Article
This article aims to provide comprehensive details on Class 150 flange dimensions in millimeters, covering standards, types, and specifications․ It serves as a reference guide for engineers, fabricators, and professionals, ensuring accurate measurements and compliance with industry standards for safe and efficient piping system installations․
Standards and Specifications for Class 150 Flanges
Class 150 flanges adhere to ANSI B16․5 and ASME B16․47 standards, ensuring precise dimensional specifications in millimeters for manufacturing and installation, while meeting industry safety and performance requirements․
2․1 ANSI B16․5 Standard for Class 150 Flanges
The ANSI B16․5 standard provides detailed dimensional specifications for Class 150 flanges, including outside diameter, bolt circle, hub diameter, and thickness in millimeters․ This standard ensures compatibility and uniformity across manufacturing and installation processes, covering various flange types such as welding neck, socket weld, and slip-on flanges․ Compliance with ANSI B16․5 is essential for maintaining structural integrity and safety in piping systems․
2․2 ASME B16․47 Standard for Class 150 Flanges
The ASME B16․47 standard outlines specifications for large diameter Class 150 flanges, typically used in high-pressure and large-scale industrial applications․ It provides precise measurements in millimeters for flange diameters, hub lengths, and bolt hole configurations, ensuring reliability and consistency․ This standard is often referenced for custom or specialized flange requirements, complementing the ANSI B16․5 standard with its focus on larger flanges and unique dimensional needs․
2․3 Key Differences Between ANSI B16․5 and ASME B16․47
The ANSI B16․5 standard covers smaller to medium-sized Class 150 flanges, focusing on standardized dimensions for general piping systems․ In contrast, ASME B16․47 addresses larger flanges, often used in heavy-duty applications․ While both provide millimeter measurements, ASME B16․47 includes more detailed specifications for custom and large-diameter flanges, making it ideal for specialized industrial needs․ ANSI B16․5 is more commonly used for standard piping setups․
Types of Class 150 Flanges
Class 150 flanges include Welding Neck, Socket Weld, Slip-On, Lap Joint, and Blind Flanges, each designed for specific piping applications and dimensional requirements in mm․
3․1 Welding Neck Flanges
Welding Neck Flanges are a popular choice for Class 150 applications, offering a strong, weldable connection․ They feature a long neck and tapered hub for enhanced strength and alignment․ Ideal for high-pressure and high-temperature environments, these flanges are commonly used in chemical plants, oil refineries, and power generation․ Dimensions are precisely specified in mm, ensuring reliability and compliance with ANSI B16․5 and ASME B16․47 standards․
3․2 Socket Weld Flanges
Socket Weld Flanges are ideal for small pipe sizes and high-pressure applications․ They feature a socket where the pipe fits, creating a smooth flow and reducing turbulence․ These flanges are lightweight and easy to install, with dimensions specified in mm for precise compatibility․ They are widely used in chemical and petrochemical industries, adhering to ANSI B16․5 and ASME B16․47 standards for quality and performance․
3․3 Slip-On Flanges
Slip-On Flanges are versatile and cost-effective, fitting over the pipe end and welded in place․ Their dimensions are precisely specified in millimeters for Class 150 applications․ These flanges are ideal for low to moderate pressure environments and are commonly used in industrial piping systems due to their simplicity and ease of installation, adhering to ANSI B16․5 standards for reliability and performance․
3․4 Lap Joint Flanges
Lap Joint Flanges are designed with a curved radius to accommodate a lap joint stub end․ Their dimensions in Class 150 are specified in millimeters, ensuring compatibility and ease of assembly․ These flanges are ideal for applications requiring frequent disassembly and are widely used in chemical and petrochemical industries, offering flexibility and reliability under ANSI B16․5 standards for precise fitting and durability․
3․5 Blind Flanges
Blind Flanges are solid, flat end components used to seal pipe ends․ In Class 150, their dimensions are precisely defined in millimeters under ANSI B16․5 standards․ These flanges are ideal for capping pipe systems, offering a tight seal and resistance to pressure․ Their compact design and durability make them a preferred choice for hydraulic and pneumatic systems, ensuring reliability and ease of installation․
Dimensional Parameters of Class 150 Flanges
Key measurements include outside diameter (O), bolt circle diameter (K), raised face diameter (G), flange thickness (T), hub diameter (X), and length through the hub (Y), precisely defined in mm․
4․1 Outside Diameter of Flange (O)
The outside diameter (O) of a Class 150 flange is the overall measurement across the flange face, including the raised face if applicable, and is specified in millimeters to ensure compatibility and proper fitment in piping systems․ This dimension is critical for mating with pipes and other equipment, adhering strictly to ANSI B16․5 and ASME B16․47 standards for consistency and reliability․ Accurate measurement of (O) ensures leak-free connections and structural integrity in industrial applications, making it a fundamental parameter for engineers and fabricators to reference when selecting or manufacturing Class 150 flanges․ The outside diameter varies by nominal pipe size, ranging from smaller sizes like 1/2″ to larger diameters up to 24″, each with its specific (O) value detailed in dimensional charts and technical drawings available in PDF format for easy access and precise specification․ This ensures that all components align perfectly, maintaining system efficiency and safety․ By adhering to these standardized measurements, manufacturers and users can rely on the durability and performance of Class 150 flanges across various industries, including oil and gas, chemical processing, and power generation, where high-pressure and high-temperature conditions are common․ Regular updates and revisions to these standards ensure that the specified outside diameters continue to meet the evolving demands of modern engineering and environmental regulations, providing a robust and adaptable solution for diverse applications․ Engineers and technicians can download comprehensive PDF guides that include detailed tables, diagrams, and specifications for Class 150 flanges, making it easier to verify and implement the correct (O) dimension for their specific projects․ This accessibility supports efficient project planning and execution, minimizing errors and ensuring compliance with industry norms․ In summary, the outside diameter (O) is a crucial dimension that plays a central role in the design, installation, and operation of Class 150 flanges, underscoring the importance of precise measurements in maintaining the integrity of piping systems worldwide․
4․2 Diameter of Bolt Circle (K)
The diameter of the bolt circle (K) for Class 150 flanges is the distance between the centers of two opposite bolt holes․ This dimension is critical for ensuring proper bolt alignment and spacing, and it is specified in millimeters․ The value of (K) varies based on the nominal pipe size, ranging from smaller diameters for 1/2″ pipes to larger diameters for 24″ pipes, ensuring compatibility with standard bolt configurations․ Accurate measurement of (K) is essential for maintaining structural integrity and preventing leakage in piping systems․ Engineers and fabricators rely on precise (K) dimensions to ensure that bolts fit correctly and distribute stress evenly across the flange․ This dimension is clearly outlined in Class 150 flange dimension charts and technical drawings, available in PDF format, to facilitate accurate installation and maintenance․ Proper alignment of bolts within the bolt circle is crucial for the safe operation of piping systems, especially in high-pressure applications․ By adhering to standardized (K) measurements, professionals can ensure reliable performance and compliance with industry standards․ Regular updates to these standards ensure that (K) dimensions remain relevant and effective for modern engineering challenges․ These measurements are indispensable for designing, installing, and maintaining flanges across various industries, including oil and gas, power generation, and chemical processing, where precision and reliability are paramount․
4․3 Diameter of Raised Face (G)
The diameter of the raised face (G) is the contact area between the flange and its mating component, crucial for sealing․ It varies by nominal pipe size, ensuring compatibility․ For Class 150 flanges, (G) is included in the minimum flange thickness․ Accurate measurement of (G) is essential for maintaining structural integrity and preventing leakage, as specified in technical PDF charts․
4․4 Thickness of Flange (T)
The thickness of the flange (T) is a critical dimension, measured from the contact surface to the outer edge․ It ensures structural integrity and prevents leakage․ For Class 150 flanges, the minimum thickness includes the raised face height, typically 2mm for Class 150 and 300․ Accurate measurement of (T) is essential for maintaining safety and performance in industrial piping systems, as per ANSI B16․5 standards․
4․5 Diameter of Hub (X)
The diameter of the hub (X) refers to the inner cylindrical section of the flange that fits over the pipe․ For Class 150 flanges, this dimension varies by nominal pipe size (NPS), ensuring compatibility and secure connections․ Accurate hub diameter ensures proper alignment and prevents leakage, meeting ANSI B16․5 and ASME B16․47 specifications for industrial applications․
4․6 Length Through Hub (Y)
The length through hub (Y) measures the distance from the flange face to the inner edge of the hub․ For Class 150 flanges, this dimension ensures proper pipe insertion and alignment, varying by NPS․ Accurate Y dimensions are critical for secure connections, meeting ANSI B16․5 and ASME B16․47 standards to prevent leakage and ensure structural integrity in industrial piping systems․
Bolt and Hole Dimensions for Class 150 Flanges
Bolt and hole dimensions are critical for Class 150 flanges, specifying the number, diameter, and arrangement of bolts and holes for secure connections, as per ANSI standards․
5․1 Number of Bolts
The number of bolts for Class 150 flanges varies by nominal pipe size, ranging from 4 bolts for smaller sizes (e․g․, 1/2″) to 24 bolts for larger diameters (e․g․, 24″)․ This ensures even distribution of stress and secure connections, adhering to ANSI B16․5 standards for reliable performance in industrial piping systems․
5․2 Diameter of Bolt Holes
The diameter of bolt holes for Class 150 flanges is typically 22․5 mm for sizes up to DN50 and increases for larger sizes․ Bolt holes are drilled 1/8 inch larger than the bolt diameter to ensure proper fitment․ These dimensions are specified in ANSI B16․5 and vary slightly with pipe size to maintain alignment and security in piping systems․
5․3 Pitch Circle Diameter
The pitch circle diameter (PCD) for Class 150 flanges ranges from 88․9 mm for 1/2″ pipe size up to 990 mm for larger diameters․ It ensures proper alignment of bolts and flanges, maintaining structural integrity․ PCD dimensions are standardized in ANSI B16․5 and ASME B16․47, ensuring compatibility and accuracy across industrial applications․
Raised Face Dimensions for Class 150 Flanges
Raised face height for Class 150 flanges is typically 2 mm, ensuring a smooth, even surface for sealing․ The finish is standardized to ensure leak-free connections in industrial systems․
6․1 Raised Face Height
The raised face height for Class 150 flanges is typically 2 mm, measured from the flange face to the outer edge of the raised area․ This dimension ensures proper alignment and seating of gaskets, maintaining integrity under pressure․ The height is included in the minimum flange thickness, adhering to ANSI B16․5 and ASME standards for consistency and reliability in industrial applications․
6․2 Raised Face Finish
The raised face finish for Class 150 flanges typically meets ANSI B16․5 standards, with a surface roughness of Ra 3․2 to 6․4 µm․ This finish ensures a smooth, even surface for proper gasket sealing, minimizing the risk of leakage․ The finish type, such as concentric serrated or spiral serrated, is specified to maintain integrity under pressure and operational stresses․
Weight Chart for Class 150 Flanges
Class 150 flange weights vary by size and material, with approximate values provided in charts․ Consult specific dimensions or manufacturer data for precise weight calculations․
7․1 Approximate Weight of Class 150 Flanges
Class 150 flanges weigh between 4․7 kg for 1/2″ sizes and up to 105 kg for 24″ sizes․ Weight varies based on material and size, with steel flanges being the most common․ Always refer to specific manufacturer data for precise weight calculations, as variations may occur due to material density and manufacturing processes․
7․2 Weight Tolerance and Variations
Weight tolerance for Class 150 flanges typically ranges between ±5% to ±10% of the specified weight, depending on the manufacturer․ Variations occur due to differences in material grades, manufacturing processes, and exact dimensions․ It’s essential to consult manufacturer specifications for precise weight tolerances, as standard tables may not account for all variables․
Applications and Uses of Class 150 Flanges
Class 150 flanges are widely used in oil, gas, chemical, and water industries due to their durability and resistance to corrosion, ideal for low-pressure applications and piping systems․
8․1 Industrial Applications
Class 150 flanges are extensively used in oil, gas, chemical, and water industries for low to medium pressure and temperature applications․ Their durability and resistance to corrosion make them ideal for piping systems, valves, and equipment connections․ They are also employed in power plants, refineries, and industrial processes requiring reliable and cost-effective solutions․
8․2 Common Industries Using Class 150 Flanges
Class 150 flanges are widely utilized in the petrochemical, oil and gas, chemical processing, and water treatment industries․ Additionally, they are used in power generation, food processing, pharmaceuticals, and automotive sectors․ Their versatility and adherence to international standards make them a preferred choice for safe and efficient fluid and gas handling in diverse industrial environments․
How to Download Class 150 Flange Dimensions in PDF
Visit official standards like ASME B16․5 or ANSI B16․47, or manufacturers’ websites․ Reliable sources include htpipe․com․ Verify the source for accuracy and compliance with industry specifications․
9․1 Sources for Reliable PDF Downloads
Reliable PDF downloads for Class 150 flange dimensions are available from official standards like ASME and ANSI․ Manufacturers’ websites, such as htpipe․com, also provide accurate dimensional charts; Ensure the source is credible and adheres to industry standards for precise measurements․
Important Notes and Considerations
9․2 Steps to Create a Custom Dimensional PDF
To create a custom PDF of Class 150 flange dimensions, start by gathering data from ANSI B16․5 or ASME B16․47․ Use design software to organize the information into tables and diagrams․ Export the design as a PDF, ensuring all dimensions are clearly visible and accurately labeled․ Verify measurements before finalizing to maintain precision and compliance with industrial standards․