The threaded flange design (also called a ‘screwed flange’) uses a screw thread to connect the flange to a pipe. A male thread is cut onto a pipe end whilst a female thread is cut into the bore of the flange; the male threaded pipe is then screwed into the female threaded flange.
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Details of Threaded Flange: 1. threaded flange; 2. thread; 3. pipe or fitting |
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Even though the threaded flange design is available in many sizes and pressure ratings, it is mainly used for small sized piping systems i.e. ≤ 4 inches. Its usage is also typically restricted to non-toxic systems, low pressure systems, and low temperature systems. ½ inch to 2-inch size threaded flanges are much more common than sizes of 2 inches and above. Due to their lower pressure applications, threaded flanges use flat and raised faces only. They are not suitable for high temperature applications because the thread geometry would distort, which often leads to leakage.
The major advantage with threaded flanges is that they can be connected to a pipe without the need for welding. Forming joints without needing to weld is a considerable advantage, and is essential in some locations and industries e.g. explosive areas (Ex rated areas) such as petrol stations, hexane plants, stores with flammable fluids etc. If no welding is required, a potential source of ignition is removed. Another advantage is that it is quicker and easier to assemble and disassemble a threaded flange joint than a welded flange joint.
Threaded flanges are not suitable for pipes that have a thin wall thickness, since cutting a thread on such pipes is difficult. In some cases, a seal weld may be used to increase the flange’s integrity and reduce the likelihood of leakage. Adding a seal weld will increase the flange’s integrity, but it also makes the joint more difficult to assemble and disassemble (because the weld makes it a permanent joint).
Most engineering groups and associations limit the use of threaded flanges to a size range from ½ to 4 inches, and pressure class 300 and below. Because no weld is used, threaded flanges are more prone to leakage than their welded joint counterparts, and the seal is susceptible to damage if flange misalignment occurs. For these reasons, threaded flanges are a poor choice for hazardous systems where leakage could have catastrophic implications.
Non-Destructive Testing (NDT) Techniques
Radiography can be used to check for corrosion on the flange face, and also for thread engagement/alignment.
ASME Standards
The requirements for the threaded flange connections are reflected in the ASME B1.20.1 and ASME B31.3 standards.
Standard Specification For Threaded Flanges
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Dimensions |
ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
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Size |
1/2" (15 NB) to 48" (1200NB) |
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Class |
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc. |
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DIN |
DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673 |
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BS |
BS4504 , BS4504, BS1560, BS10 |
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Flange Face Type |
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Material & Grades of Threaded Flanges
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Stainless Steel Threaded Flanges |
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L |
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Duplex & Super Duplex Steel Threaded Flanges |
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61 |
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Carbon Steel Threaded Flanges |
ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 |
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Low Temperature Carbon Steel Threaded Flanges |
ASTM A350, LF2, LF3 |
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Alloy Steel Threaded Flanges |
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91 |
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Copper Alloy Steel Threaded Flanges |
ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200 |
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Nickel Alloy Threaded Flanges |
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) |
ASME B16.5 Raised Faced Threaded Flanges Available Types
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Threaded Flange |
Screwed Flanges |
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ANSI B16.5 Threaded Flanges |
Threaded Flange Dimensions |
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ASME B16.5 Screwed Flanges |
ANSI B16.5 Class 150 Threaded Flanges |
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Stainless Steel Threaded Flanges Suppliers |
SS Threaded Flange |
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Threaded Plate Flanges Dealer |
ASME B16.47 Series A and B Screwed Flanges Exporter |
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ANSI B16.5 class 150 Screwed Flange Stockholder |
ANSI 150 Threaded Flange Distributors |
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Carbon Steel Threaded Flange |
High Quality Screwed Flanges Manufacturer |
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ASTM A182 Stainless Steel Screwed Flange |
Duplex Steel Threaded Flange |
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Super Duplex Steel Threaded Forged Flange |
Copper Nickel Threaded Pipe Flanges |
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High Nickel Alloy Screwed Flanges |
Hastelloy Flat Faced Threaded Flanges Stockist |
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Titanium ASME B16.47 Series A and B Screwed Flanges |
Inconel Threaded Flanges |
ANSI B16.5 Threaded Flanges Application
ASME B16.5 Threaded Flanges are known to deliver exceptional performance and are generally developed for meeting the demands. We offer a broad range of Screwed Flanges through a worldwide network of stock-keeping branches. These Threaded Flange is use in various industries like :
Stainless Steel Threaded Flanges uses in Oil and Gas Pipeline
Threaded Flanges uses in Chemical Industry
Alloy Steel Screwed Flanges uses in Plumbing
Flat Faced Threaded Flanges uses in Heating
Threaded Pipe Flanges uses in Water Supply Systems
ANSI B16.5 Threaded Forged Flanges uses in Power Plant
Threaded Plate Flanges uses in Paper & Pulp Industry
Threaded Flange uses in General Purpose Applications
Steel Threaded Flanges uses in Fabrication Industry
Threaded Flange uses in Food Processing Industry
Threaded Flanges uses in Structural Pipe
