Blind Flanges manufactured at our Mumbai facility come with an assurance of quality, durability, and precision. At Tirupati Enterprises, we uphold global manufacturing standards, ensuring excellence from raw material selection to the final product. We are a leading importer, stockholder, supplier, and exporter of Blind Flanges, catering to industries worldwide. Our commitment to quality and consistency extends across our entire supply chain.
A Blind Flange, also known as a blind plate, is a solid flange without a central hole, primarily used to seal off pipelines. It is available in various sealing surfaces, including flat face, raised face, tongue-and-groove, and ring joint faces, making it suitable for diverse industrial applications.
At Tirupati Enterprises, we leverage advanced forging technology to produce high-grade, customized flanges. Our state-of-the-art forging shop features an automated steel bar furnace, heating raw materials up to 1,100°C before processing them into precision-engineered rings and flanges with diameters of up to 2,800 mm using specialized bending equipment.
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Blind Flange Dimensions and Tolerances
NPS 1/2
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter – D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height – B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter – G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter – K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter – L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances of Blind Flanges ASME B16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0 |
Length thru Hub ≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm |
Tirupati Enterprises specializes in the manufacturing and supply of Stainless Steel Flanges, Pipe Fittings, Forged Fittings, Butt Weld Fittings, and other carbon and alloy steel products. Since 1991, we have been delivering high-quality industrial flanges and fittings, catering to global standards such as ASME, ASTM, and API.
We manufacture and export seamless and welded stainless steel flanges to over 60 countries, serving industries across:
Nigeria, Australia, Malaysia, Egypt, South Africa, Kenya, Germany, Turkey, France, the UK, Italy, the Netherlands, Iran, Iraq, Saudi Arabia, UAE, Israel, Jordan, Oman, Kuwait, Qatar, Bahrain, China, Indonesia, South Korea, Pakistan, Singapore, Brazil, Argentina, and the USA.
Tirupati Enterprises is an ISO 9001:2008, ISO 14001, OHSAS 18001 certified company since 2006 and a PED-approved manufacturer since 2008. We are among India's top manufacturers and suppliers of industrial flanges, with approvals from leading global companies, including:
We manufacture and export pipe flanges ranging from ½” to 200” with pressure ratings of 150 lbs to 3000 lbs, covering a wide spectrum of carbon steel, stainless steel, and alloy steel flanges. Our expertise includes flanges compliant with ANSI, API, MSS, AWWA, DIN, JIS, BS, and GB standards.
Additionally, we specialize in custom ring flanges and precision-engineered forgings as per client specifications. Our production facility ensures stringent quality control, delivering products tailored to petrochemical, chemical, and waterworks industries.
📏 Sizes: ½” to 198”
Before purchasing ANSI, API, AWWA pipe flanges, compare our prices and experience the superior quality that makes Tirupati Enterprises a global leader in stainless steel and alloy steel manufacturing.
At Tirupati Enterprises, we specialize in delivering innovative and sustainable solutions to empower industries worldwide. With a legacy of trust, a commitment to quality, and a vision for progress, we strive to build a resilient future while meeting the evolving needs of our clients.
1st Kumbharwada, Shop No 24, Ground Floor, Plot No. 59/61, Khandke Building, Bhandari Street, Durgadevi Udyan, Girgaon, Mumbai, Maharashtra - 400004, India
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