ASME B16.47 Series B Class 75 weld neck flanges are specially engineered for large-diameter piping systems operating under low-pressure conditions. These flanges feature a long tapered hub and are butt-welded to the pipe, ensuring exceptional strength and resistance to dishing and fatigue. Tesco Steel & Engineering manufactures these flanges to precise ASME specifications, making them ideal for critical applications where a secure and permanent connection is required, such as in oil and gas, chemical, and water infrastructure projects.
Tesco Steel & Engineering is recognized for delivering superior quality weld neck flanges that offer both reliability and performance. Our Class 75 Series B weld neck flanges are produced using high-grade materials including stainless steel, carbon steel, and other corrosion-resistant alloys, catering to diverse industrial requirements. Rigorous quality checks, advanced machining, and a focus on dimensional accuracy ensure that each flange meets the highest standards of durability, weldability, and long-term operation in demanding environments.
We proudly export ASME B16.47 Series B Class 75 weld neck flanges to countries such as the USA, UK, Germany, Italy, Saudi Arabia, UAE, and Oman. Tesco Steel & Engineering serves clients across industries ranging from petrochemical and power generation to water treatment and offshore engineering. Our global reach and trusted manufacturing capabilities have made us a preferred partner for businesses looking for high-quality, ASME-compliant piping components that perform with consistency and precision.
| Pipe Normal Diam. | O.D. OF Flange |
Thick ness (Thk.) |
Length Through Hub |
Diam. of Hub at Base |
Hub Diam. Top |
Raised Face Diam. |
Diam. of Bolt Circle |
No. of Bolt Holes |
Diam. of Bolt Holes |
Diam. of Bolt |
Fillet Radius Min. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| inch | O | C | Y | X | A | R | BD | BN | BH | DB | r1 |
| 26" | 762 | 33.3 | 58.7 | 676.1 | 661.9 | 704.9 | 723.9 | 36 | 19.1 | 5/8" | 7.9 |
| 28" | 812.8 | 33.3 | 62 | 726.9 | 712.7 | 755.7 | 774.7 | 40 | 19.1 | 5/8" | 7.9 |
| 30" | 863.6 | 33.3 | 65 | 777.7 | 763.5 | 806.5 | 825.5 | 44 | 19.1 | 5/8" | 7.9 |
| 32" | 914.4 | 35.1 | 69.9 | 828.5 | 814.3 | 857.3 | 876.3 | 48 | 19.1 | 5/8" | 7.9 |
| 34" | 965.2 | 35.1 | 73.2 | 879.3 | 865.1 | 908.1 | 927.1 | 52 | 19.1 | 5/8" | 7.9 |
| 36" | 1033.5 | 36.6 | 85.8 | 935 | 915.9 | 965.2 | 992.1 | 40 | 22.4 | 3/4" | 9.7 |
| 38" | 1084.3 | 38.1 | 88.9 | 985.8 | 966.7 | 1016 | 1042.9 | 40 | 22.4 | 3/4" | 9.7 |
| 40" | 1135.1 | 38.1 | 91.9 | 1036.6 | 1017.5 | 1066.8 | 1093.7 | 44 | 22.4 | 3/4" | 9.7 |
| 42" | 1185.9 | 39.6 | 95.3 | 1087.4 | 1068.3 | 1117.6 | 1144.5 | 48 | 22.4 | 3/4" | 9.7 |
| 44" | 1251 | 42.9 | 104.6 | 1140 | 1119.1 | 1174.8 | 1203.5 | 36 | 25.4 | 7/8" | 9.7 |
| 46" | 1301.8 | 44.5 | 108 | 1190.8 | 1169.9 | 1225.6 | 1254.3 | 40 | 25.4 | 7/8" | 9.7 |
| 48" | 1352.6 | 46 | 111.3 | 1241.6 | 1220.7 | 1276.4 | 1305.1 | 44 | 25.4 | 7/8" | 9.7 |
| 50" | 1403.4 | 47.8 | 115.8 | 1293.9 | 1271.5 | 1327.2 | 1355.9 | 44 | 25.4 | 7/8" | 9.7 |
| 52" | 1457.5 | 47.8 | 120.7 | 1344.7 | 1322.3 | 1378 | 1409.7 | 48 | 25.4 | 7/8" | 9.7 |
| 54" | 1508.3 | 49.3 | 125.5 | 1397 | 1373.1 | 1428.8 | 1460.5 | 48 | 25.4 | 7/8" | 9.7 |
| 56" | 1574.8 | 50.8 | 134.9 | 1450.8 | 1423.9 | 1485.9 | 1521 | 40 | 28.4 | 1" | 11.2 |
| 58" | 1625.6 | 52.3 | 138.2 | 1501.6 | 1474.7 | 1536.7 | 1571.8 | 44 | 28.4 | 1" | 11.2 |
| 60" | 1676.4 | 55.6 | 144.5 | 1552.4 | 1525.5 | 1587.5 | 1622.6 | 44 | 28.4 | 1" | 11.2 |
Countries we export to:ANSI ASME B16.47 Series B Class 75 Weld Neck 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: ASME B16.47 Series B CLass 75 Weld Neck 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.