Home Flanges – Blind Flange

Blind Flange

Blind Flange

A blind flange is a type of flange that seals the end of a pipe or pressure tank in a piping system. It is called a “blind” flange because no hole or bore exists in the middle. Instead, it is a flat, solid plate with holes for bolts around its edge. A blind flange’s main job is to close off the end of a pipe or tank, either temporarily or for good. It makes a good seal that prevents leaks from happening and prevents unwanted materials from entering the system. Blind flanges are often used to close off the end of a pipe or vessel during upkeep, repairs, or when a part of the system is not being used. One of the most important things about a blind lip is that it can make a good seal. The bolt holes around the flange connect it to another flange or equipment. These bolt holes make it possible to make a tight connection, which keeps the blind lip in place and keeps the seal working. The number and size of the bolt holes depend on how big the ring is and how much pressure it can handle.
Blind flanges come in different types and sizes to meet the needs of different industries. The three most popular types are raised-face (RF), flat-face (FF), and ring-type joint (RTJ) blind flanges. Raised-face blind flanges have a raised surface around the hole, which gives them a larger area for closing. Flat-face blind flanges have a flat surface, making them good for low-pressure uses. Ring-type joint blind flanges have a metal ring gasket that provides a tight seal in high-pressure and high-temperature applications. Blind flanges are usually made from materials that are formed or cast. Because they are strong and don’t rust, carbon steel, stainless steel, and alloy steel are often used. The type of material used depends on the purpose, including pressure, temperature, and the type of fluid being moved. Blind flanges are made according to industry standards to ensure they are consistent and of good quality. ASME/ANSI B16.5, ASME B16.47, API, DIN, and EN are some of these standards. They list the blind flanges’ sizes, materials, maximum pressures, and testing standards. They must follow these guidelines to ensure that piping systems are safe, compatible, and easy to use.
Blind flanges are used in many businesses, such as oil and gas, chemical processing, power generation, water treatment, and petrochemicals. They are used in pipe ends, pressure tanks, heat exchangers, pumps, and other pieces of machinery. Blind flanges are very important to the safety and stability of piping systems because they create a tight seal at the ends of the pipes. In conclusion, a blind flange is a solid, flat plate with bolt holes around its perimeter to seal the end of a pipe system or pressure tank. Its job is to close off the end, either briefly or permanently, and make a good seal to stop leaks or the entry of foreign materials. Different blind flanges are made of carbon steel or stainless steel and according to industry standards. They are used in many different businesses to keep piping systems safe and in good shape.

Blind 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 Blind Flange

Carbon Steel Blind FlangeASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Stainless Steel Blind FlangeASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Alloy Steel Blind FlangeASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium Blind FlangeASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7
ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper Blind FlangeT1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel Blind FlangeASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Brass Blind Flange3602 / 2604 / h39 / H62 / etc.
Inconel Blind FlangeASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 Flanges
Hastelloy Blind FlangeASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges
Monel Blind FlangeASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 Blind FlangeASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium Blind Flange5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Blind FlangeASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex Blind FlangeS31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Blind FlangeS32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy Blind FlangeASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges
254 Smo Blind FlangeASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic Blind FlangeNimonic 75, Nimonic 80A, Nimonic 90
Other Blind Flange materialTin bronze, Alumunum bronze, Lead bronze

Other Products & Grade

error: Content is protected !!
Scroll to Top