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Screwed / Threaded Flange

Screwed / Threaded Flange

A screwed or threaded flange is used in piping systems that need a safe and reliable connection. It is made with threads inside the hole to be put onto the external threads of a pipe or fitting. This threaded link ensures the seal is tight and keeps the system from leaking. Screwed / threaded flanges are often used in industries and use where the piping system needs to be taken apart and put back together again and again. They work best with low-pressure systems like water, air, and other fluids that don’t corrode. These flanges are easy to put on and remove, making upkeep and repairs easier. A screwed or threaded flange usually has a high face with threads on the inside. The higher face gives the gasket a place to fit, which is necessary for a good seal between the flange and the pipe or fitting. The flange has internal threads that screw onto the external threads of the pipe or fitting to make a secure link.
To put a screwed/threaded flange on a pipe or fitting, you turn it clockwise until it fits on the external threads. The turn keeps going until the flange is locked tightly in place. To avoid cross-threading, which can lead to a weak link or damage to the flange or pipe, it is important to ensure the threads are in the right place. The gasket is one of the most important parts of a screwed/threaded joint connection. A gasket is put between the flange and the pipe or joint where they meet to make a seal. Gaskets can be made of different materials, like rubber, PTFE (Teflon), or metal that has been spirally wound. The type of fluid being moved, the temperature, the pressure, and how well it works with the system, all affect how the seal is made. It’s important to remember that screwed or threaded openings have some limits. They are not good for high-pressure systems or uses with acidic fluids. The threaded link could lose over time because of vibrations, temperature changes, or other things. So, the flange joints must be checked and tightened occasionally to keep them from falling apart.
When choosing screwed/threaded flanges, different standards are very important for ensuring they work well together and are compatible. American standards like ANSI/ASME B16.5, European standards like EN 1092-1, and British standards like BS 10 spell out these flanges’ sizes, materials, and pressure values. By following these standards, you can be sure that the flanges meet the requirements and can work how they are supposed to. In low-pressure plumbing systems, screwed/threaded flanges provide a safe and easy way to connect pipes. Because they are threaded and easy to put on and take off, they are good for things that often need removal. But they are not good for systems with high-pressure or toxic fluids. It’s important to choose the right gaskets and follow the rules for a safe connection that doesn’t leak. The screwed/threaded flange connections in the pipe system must be checked and maintained regularly so that any problems can be fixed and the connections stay strong.

Screwed / Threaded Flange Specifications

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Material & Grades of Screwed / Threaded Flange

Stainless Steel Screwed / Threaded Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
Duplex & Super Duplex Steel Screwed / Threaded Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Carbon Steel Screwed / 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
Low Temperature Carbon Steel Screwed / Threaded Flanges : ASTM A350, LF2, LF3
Alloy Steel Screwed / Threaded Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Copper Alloy Steel Screwed / 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
Nickel Alloy Screwed / 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)

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