Tesco Steel & Engineering is a trusted global exporter of ASME B16.5 Class 600 Long Weld Neck Flanges, delivering to countries such as the USA, Germany, France, Italy, Saudi Arabia, UAE, and Oman. Our flanges are relied upon by industries including oil & gas, petrochemicals, shipbuilding, chemical processing, and power generation. With a reputation for on-time delivery, precision engineering, and superior reliability, we have become a preferred supplier of long weld neck flanges for international clients seeking high-quality piping components.
At our ultra-modern Mumbai factory, every Class 600 LWN flange is manufactured using advanced CNC machinery, automated forging systems, and rigorous quality inspections. Tesco Steel & Engineering is well-known for its superior quality manufacturing, producing flanges that resist high pressure, extreme temperatures, and corrosive conditions. Offered in stainless steel, carbon steel, and alloy steel, our products are built to deliver consistent performance in refineries, offshore platforms, and thermal power facilities.
ASME B16.5 Class 600 Long Weld Neck Flanges, also referred to as LWNRF #600, LWNFF #600, or LWN Flanges #600, are designed for high-pressure pipelines where secure welding and structural integrity are critical. Their extended neck ensures excellent stress distribution and reduces fatigue at the joint, making them ideal for mission-critical applications. Tesco Steel & Engineering manufactures these flanges to meet stringent ASME B16.5 standards, offering clients globally a reliable and durable solution for demanding piping systems.
| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | Hub OD | Weld Neck OD | RF Dia. | RF Height | PCD | Hub Length | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size |
| A | B | C | D | E | F | G | H | |||||||
| 1/2 | 15 | 95 | 14.3 | 38 | 21.3 | 34.9 | 7 | 66.7 | As Required | 4 | 1/2 | 75 | 5/8 | M14 |
| 3/4 | 20 | 115 | 15.9 | 48 | 26.7 | 42.9 | 7 | 82.6 | As Required | 4 | 5/8 | 90 | 3/4 | M16 |
| 1 | 25 | 125 | 17.5 | 54 | 33.4 | 50.8 | 7 | 88.9 | As Required | 4 | 5/8 | 90 | 3/4 | M16 |
| 1 1/4 | 32 | 135 | 20.7 | 64 | 42.2 | 63.5 | 7 | 98.4 | As Required | 4 | 5/8 | 95 | 3/4 | M16 |
| 1 1/2 | 40 | 155 | 22.3 | 70 | 48.3 | 73 | 7 | 114.3 | As Required | 4 | 3/4 | 110 | 7/8 | M20 |
| 2 | 50 | 165 | 25.4 | 84 | 60.3 | 92.1 | 7 | 127 | As Required | 8 | 5/8 | 110 | 3/4 | M16 |
| 2 1/2 | 65 | 190 | 28.6 | 100 | 73 | 104.8 | 7 | 149.2 | As Required | 8 | 3/4 | 120 | 7/8 | M20 |
| 3 | 80 | 210 | 31.8 | 117 | 88.9 | 127 | 7 | 168.3 | As Required | 8 | 3/4 | 125 | 7/8 | M20 |
| 3 1/2 | 90 | 230 | 35 | 133 | 101.6 | N/A | 7 | 184.2 | As Required | 8 | 7/8 | 140 | 1 | M24 |
| 4 | 100 | 275 | 38.1 | 152 | 114.3 | 157.2 | 7 | 215.9 | As Required | 8 | 7/8 | 145 | 1 | M24 |
| 5 | 125 | 330 | 44.5 | 189 | 141.3 | 185.7 | 7 | 266.7 | As Required | 8 | 1 | 165 | 1 1/8 | M27 |
| 6 | 150 | 355 | 47.7 | 222 | 168.3 | 215.9 | 7 | 292.1 | As Required | 12 | 1 | 170 | 1 1/8 | M27 |
| 8 | 200 | 420 | 55.6 | 273 | 219.1 | 269.9 | 7 | 349.2 | As Required | 12 | 1 1/8 | 190 | 1 1/4 | M30 |
| 10 | 250 | 510 | 63.5 | 343 | 273 | 323.8 | 7 | 431.8 | As Required | 16 | 1 1/4 | 215 | 1 3/8 | M33 |
| 12 | 300 | 560 | 66.7 | 400 | 323.8 | 381 | 7 | 489 | As Required | 20 | 1 1/4 | 220 | 1 3/8 | M33 |
| 14 | 350 | 605 | 69.9 | 432 | 355.6 | 412.8 | 7 | 527 | As Required | 20 | 1 3/8 | 235 | 1 1/2 | M36 |
| 16 | 400 | 685 | 76.2 | 495 | 406.4 | 469.9 | 7 | 603.2 | As Required | 20 | 1 1/2 | 255 | 1 5/8 | M39 |
| 18 | 450 | 745 | 82.6 | 546 | 457 | 533.4 | 7 | 654 | As Required | 20 | 1 5/8 | 275 | 1 3/4 | M42 |
| 20 | 500 | 815 | 88.9 | 610 | 508 | 584.2 | 7 | 723.9 | As Required | 24 | 1 5/8 | 285 | 1 3/4 | M42 |
Countries we export to: ASME B16.5 Class 600 Long 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: ANSI B16.5 #600 LWNRF 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.