Flat Face Weld Neck Flange dimensions are specified to ensure proper fit and function in piping systems. These flanges feature a flat facing, meaning the flange face is smooth and level, designed to mate with other flat-faced flanges or flat surfaces. The dimensions include the outer diameter, inner diameter, bolt circle diameter, bolt hole diameter, and the flange thickness. If you are interested in our flat face weld neck flanges, please contact us.
Flat Face Weld Neck Flange Dimensions Reference
Nominal Pipe Size (NPS) | Outside Diameter (OD) | Diameter of Bolt Circle (BC) | Number of Bolt Holes | Bolt Hole Diameter | Thickness (T) | Length Through Hub (L) |
2″ | 6.0 inches | 4.75 inches | 4 | 0.75 inches | 0.88 inches | 2.88 inches |
4″ | 11.0 inches | 8.50 inches | 8 | 0.88 inches | 1.25 inches | 4.50 inches |
6″ | 13.5 inches | 10.63 inches | 8 | 0.88 inches | 1.38 inches | 5.00 inches |
8″ | 17.0 inches | 13.50 inches | 8 | 0.88 inches | 1.50 inches | 6.00 inches |
Standard Specifications Of Flat Face Weld Neck Flange Dimensions
This specification pertains to pipe flanges and fittings that are flanged for sizes ranging from 1/2 inch to 24 inches. It includes pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing.
Often used interchangeably with ASME, ANSI provides standards for dimensions and pressure ratings, ensuring compatibility and safety across different manufacturers and systems.
This specification is for wellhead and Christmas tree equipment, including flanges, covering sizes and pressure ratings utilized in the drilling and production of oil and gas.
This standard includes steel pipeline flanges covering nominal pipe sizes from 1/2 inch to 144 inches, designed for high-pressure systems.
The German standard for industrial flanges, DIN specifications provide dimensional and material guidelines for flanges used in Europe and internationally.
Similar to DIN, EN standards cover various dimensions, materials, and testing methods for flanges used in European and global markets.
Flat Face Weld Neck Flange Dimensions Size Range
Flat Face Weld Neck Flanges are available in a variety of sizes to accommodate different piping needs and applications. The size range typically starts from as small as 1/2 inch (DN 15) and extends up to 79 inches (DN 2000) or larger, depending on the specific standards and manufacturer capabilities.
This range covers a wide spectrum of industrial requirements, from smaller diameter pipes used in residential and commercial plumbing to larger diameter pipes found in industrial environments like oil and gas facilities, petrochemical plants, power generation stations, and water treatment facilities. The selection of flange size is crucial to ensuring proper alignment, efficient fluid flow, and structural integrity within the piping system, adhering to standards such as ASME B16.5, ANSI, API, DIN, and others to ensure compatibility and reliability.
Flat Face Weld Neck Flange Dimensions Pressure Ratings
Flat Face Weld Neck Flange pressure ratings denote the maximum allowable pressure levels these flanges can withstand within specified temperature ranges, crucial for ensuring safe and efficient operation in diverse industrial applications. Standardized by organizations like ASME and ANSI, these ratings classify flanges into different classes such as Class 150, Class 300, Class 600, and so on, each corresponding to increasing pressure capacities typically ranging from 150 psi to 2000 psi and beyond.
The selection of a flange’s pressure rating depends on factors such as pipe size, material composition (e.g., carbon steel, stainless steel), and system requirements, with higher class ratings indicating greater resilience to pressure. Compliance with these ratings is essential to maintain the integrity and reliability of piping systems across industries like oil and gas, chemical manufacturing, and electricity generation.
Flat Face Weld Neck Flange Dimensions Dimensional Details
Outer Diameter (OD)
The total diameter of the flange, which matches the pipe size it connects to.
Inner Diameter (ID)
The diameter of the bore, aligning with the inner diameter of the pipe for smooth fluid flow.
Bolt Circle Diameter (BCD)
The diameter of the circle formed by the centers of the bolt holes, crucial for aligning and securing the flange.
Bolt Hole Diameter
The diameter of each bolt hole, ensuring proper fit and strength of the bolted connection.
Flange Thickness
The thickness of the flange, which varies depending on the flange class and size to withstand the pressures and stresses within the system.
Hub Length
The length of the hub, providing space to accommodate the pipe and ensuring proper alignment and support.
Flat Face Weld Neck Flange Dimensions Material Specifications
Often used in general-purpose applications where corrosion resistance and strength are essential factors.
Provides excellent corrosion resistance and durability, suitable for environments with high moisture or chemical exposure.
Offers enhanced strength and resistance to high temperatures and pressures, ideal for demanding industrial applications.
Flat Face Weld Neck Flange Dimensions Surface Finish
Smooth Finish
The flange face is machined to a smooth and flat surface to ensure even contact with the gasket, preventing leakage.
Corrosion Protection
Depending on the material used, the flange may receive additional treatments such as coating or plating to enhance corrosion resistance, especially in aggressive environments.
Precision Machining
Machining processes such as grinding or lapping may be employed to achieve the required surface finish, ensuring uniformity across the entire flange face.
Elite Piping Manufacture Co., Ltd. specializes in the production of high-quality flat face weld neck flanges, providing an extensive array of products crafted to meet stringent industry standards and customer specifications. With an emphasis on precise engineering and high standards assurance, Elite Piping Manufacture Co., Ltd. ensures that our flanges exhibit superior dimensional accuracy, excellent surface finish, and reliable performance in diverse industrial applications.
Our manufacturing processes adhere to international standards such as ASME, ANSI, and API, guaranteeing consistency and durability in products tailored to meet the demands of industries such as oil and gas, petrochemicals, power generation, and more. Elite Piping Manufacture Co., Ltd. distinguishes ourselves through a commitment to innovation, customer satisfaction, and sustainable manufacturing practices, making us a trusted partner for flange solutions worldwide.
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Elite Piping Manufacture Co., Ltd.
Factory Address：
Office # 805, Building No. 6 Poly Metropolitan, Yongshum Town, Tongzhou District, Beijing, China.
Contact Person：
Michael
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+86 186 1829 1381
Email:
elite@elitepiping.com
