ASME B16.5 Class 400 Blind Flanges are designed for medium to high-pressure piping systems, providing a secure method of sealing the ends of pipes, valves, or pressure vessels. Also known as BLRF #400 (Blind Raised Face), BLFF #400 (Blind Flat Face), or simply Blank Flanges #400, these flanges are widely used in industries where isolation of pipe sections is essential for inspection, testing, or maintenance. Tesco Steel & Engineering is a leading manufacturer and supplier of Class 400 blind flanges, offering products that strictly conform to ASME B16.5 standards and deliver long-lasting performance.
Manufactured in our state-of-the-art Mumbai factory, these blind flanges are produced using cutting-edge CNC machinery, precision forging, and rigorous quality control systems. Tesco Steel & Engineering is known for its superior quality manufacturing, ensuring each flange provides exceptional strength, leak-proof sealing, and resistance to corrosion and pressure fatigue. Available in stainless steel, carbon steel, and alloy steel grades, our Class 400 blind flanges are tailored to meet diverse industrial requirements and are trusted for their reliability even in demanding environments.
Tesco Steel & Engineering proudly exports ASME B16.5 Class 400 blind flanges to international markets, including the USA, Germany, France, Italy, Saudi Arabia, UAE, and Qatar. Our flanges are extensively used in sectors such as oil & gas, petrochemicals, marine engineering, water treatment, and power generation, where safety and durability are paramount. With a reputation for precision engineering, timely delivery, and customer-focused service, we continue to be a preferred supplier of high-performance blind flanges to clients worldwide.
| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | RF Dia. | RF Height | PCD | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | B | C | D | E | ||||||||
| 1/2 | 15 | 95 | 14.3 | 34.9 | 7 | 66.7 | 4 | 1/2 | 75 | 5/8 | M14 | 1.5 |
| 3/4 | 20 | 115 | 15.9 | 42.9 | 7 | 82.6 | 4 | 5/8 | 90 | 3/4 | M16 | 1.5 |
| 1 | 25 | 125 | 17.5 | 50.8 | 7 | 88.9 | 4 | 5/8 | 90 | 3/4 | M16 | 1.8 |
| 1 1/4 | 32 | 135 | 20.7 | 63.5 | 7 | 98.4 | 4 | 5/8 | 95 | 3/4 | M16 | 2.3 |
| 1 1/2 | 40 | 155 | 22.3 | 73 | 7 | 114.3 | 4 | 3/4 | 110 | 7/8 | M20 | 3.7 |
| 2 | 50 | 165 | 25.4 | 92.1 | 7 | 127 | 8 | 5/8 | 110 | 3/4 | M16 | 4.6 |
| 2 1/2 | 65 | 190 | 28.6 | 104.8 | 7 | 149.2 | 8 | 3/4 | 120 | 7/8 | M20 | 6.8 |
| 3 | 80 | 210 | 31.8 | 127 | 7 | 168.3 | 8 | 3/4 | 125 | 7/8 | M20 | 9.1 |
| 3 1/2 | 90 | 230 | 35 | N/A | 7 | 184.2 | 8 | 7/8 | 140 | 1 | M24 | 13.2 |
| 4 | 100 | 255 | 35 | 157.2 | 7 | 200 | 8 | 7/8 | 140 | 1 | M24 | 15 |
| 5 | 125 | 280 | 38.1 | 185.7 | 7 | 235 | 8 | 7/8 | 145 | 1 | M24 | 20 |
| 6 | 150 | 320 | 41.3 | 215.9 | 7 | 269.9 | 12 | 7/8 | 150 | 1 | M24 | 28 |
| 8 | 200 | 380 | 47.7 | 269.9 | 7 | 330 | 12 | 1 | 170 | 1 1/8 | M27 | 46 |
| 10 | 250 | 445 | 54 | 323.8 | 7 | 387.4 | 16 | 1 1/8 | 190 | 1 1/4 | M30 | 71 |
| 12 | 300 | 520 | 57.2 | 381 | 7 | 450.8 | 16 | 1 1/4 | 205 | 1 3/8 | M33 | 102 |
| 14 | 350 | 585 | 60.4 | 412.8 | 7 | 514.4 | 20 | 1 1/4 | 210 | 1 3/8 | M33 | 132 |
| 16 | 400 | 650 | 63.5 | 469.9 | 7 | 571.5 | 20 | 1 3/8 | 220 | 1 1/2 | M36 | 168 |
| 18 | 450 | 710 | 66.7 | 533.4 | 7 | 628.6 | 24 | 1 3/8 | 230 | 1 1/2 | M36 | 207 |
| 20 | 500 | 775 | 69.9 | 584.2 | 7 | 685.8 | 24 | 1 1/2 | 240 | 1 3/4 | M39 | 266 |
| 24 | 600 | 915 | 76.2 | 692.2 | 7 | 812.8 | 24 | 1 3/4 | 265 | 1 7/8 | M45 | 405 |
Countries we export to: ASME B16.5 Class 400 Blind Flanges Manufacturers / Suppliers / Stockist in Kuwait, in UAE, in Germany, Saudi Arabia, West Africa, Iraq, Congo, Mexico, Bahra, Canada, Philippes, Thailand, Kenya, Oman, Malaysia, Turkey, Qatar, Sudan, Netherlands, Oman, Nigeria, Lithuania, Gabon, Russia, Vietnam, Angola, Bolivia, Indonesia, UK, Yemen, Italy, United States, Venezuela, Spain, Iran, Estonia, Kazakhstan, Algeria, Jordan, Ecuador, Portugal, Colombia, Libya, Chile, Peru, Iran, South Africa, Bangkok, Namibia, Jeddah, Afghanistan, Israel, Zambia, Macau, Morocco, Denmark, Taiwan, Norway, Belarus, North Macedonia, Lebanon, Sri Lanka, Bhutan, Bulgaria, Albania, Ukrae, Belgium, Fland, Slovokia, Tibet, Romania, France, Brazil, Tridad & Tobago, Fiji, Tunisia, Gambia, Mexico, Hungary, Zimbabwe, Mongolia, Ghana, Egypt, Kazakhstan, Czech Republic, Azerbaijan, Poland, Greece, Costa Rica, Kosovo, New Zealand, Croatia, Puerto Rico, Tanzania, Somalia.
Major Exporting Areas:ANSI B16.5 Blind Flanges Manufacturers / Suppliers / Stockist in Moscow, Port-Of-Spain, Seoul, Montreal, Dubai, Kuala Lumpur, Aberdeen, Tehran, Bogota, Petaling Jaya, Melbourne, Abu Dhabi, Courbevoie, Edmonton, Ho Chi Minh City, Bangkok, Toronto, Muscat, Milan, Busan, Mexico City, Perth, La Victoria, Santiago, Rio de Janeiro, London, Karachi, Los Angeles, Manama, Geoje-si, Atyrau, Sydney, Riyadh, New York, Jeddah, Houston, Granada, Jakarta, Brisbane, Algiers, Kuwait City, Dubai, Hanoi, Doha, Al Jubail, Chiyoda, Cairo, Gimhae-si, Caracas, Lagos, Al Khobar, Madrid, Singapore, Calgary, Colombo, Ulsan, Istanbul, Ahvaz, Dammam, Dallas, Texas, Ankara, Sharjah, Vung Tau, Angola, Benin, Burundi, Botswana, Burkina Faso, Cameroon, Douala, Central African Republic, Republic of Congo, Democratic Republic of Congo, Côte d'Ivoire, Djibouti, Eritrea, Ethiopia, Equatorial Guinea, Gabon, Guinea, Kenya, Liberia,Malawi, Mali, Mauritania, Mauritius, Casablanca-Settat, Tanger-Tetouan-Al Hoceima, Fès-Meknès, Marrakesh-Safi, Oriental, Béni Mellal-Khénifra, Souss-Massa, Laâyoune-Sakia El Hamra, Rabat-Salé-Kénitra region, Mozambique, Temara, Niger, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Bangkok, Bangchan, Khlong Sam Wa, Gemopolis, Lard Krabang, Pathumthani, Bangkadi, Navanakorn, Samut Prakarn, Bangplee, Bangpoo, Saraburi, Nongkhae, SIL I/Land, Chachoengsao, 304 I/P, Gateway City, Wellgrow, Rayong, Amata City, Eastern Seaboard, Hemaraj Eastern Seaboard, Rojana, Soam Eastern, Chonburi, Amata Nakorn, Hemaraj Chonburi, Pinthong, Ayutthaya, Bangpa-in, Saha Ratna Nakorn, Nakornratchasima, Kabinburi, Prachinburi, HCMC, Tan Thuan Export Processing Zone, Bien Hoa, Dong Nai Province, Amata City Bien Hoa Industrial Park, Long Binh Techno Park, Binh Duong Province, Vietnam Singapore Industrial Park, My Phuoc Industrial Park, Ho Nai Industrial Zone, Bau Xeo Industrial Park, Long Thanh Industrial Zone, Long Duc Industrial Park, Duc Hao I, Tan Huong, Long Jiang, Tra Noc I/II, Hung Phu I, Hiep Phuoc Industrial Park, Phuoc Dong Industrial Park, Dinh Vu – Cat Hai Economic Zone.