Nishra Overseas LLP is a well-known supplier and exporter of a wide range of Flat Face Pipe Flanges that are welded with filler metal and heat treated to specifications. Carbon Steel Flat Face Flanges are threaded in a bore that corresponds to the pipe's exterior thread. Alloy Steel Flat Face Flanges are one of the most common precipitation hardening grades due to their excellent strength, toughness, hardness, and corrosion resistance. With the use of cutting-edge methods and premium raw materials produced by leading industry professionals, our Duplex Steel Flat Face Flanges are expertly crafted.
Nishra Overseas sources its flanges from a certified international provider that manufactures plate pipe flanges to global standards. We can provide flat flanges made of carbon steel and stainless steel in various sizes ex-mill for use in Indian service projects as well as export to other countries. For the Oil Gas Flanges and Power Plant industry, we have created these superior and incredibly durable plate flanges as a substitute for the Chinese ones that are no longer available in India.
High Hub Blinds Flanges are regarded as the best option, especially as they provide exceptional corrosion protection against chloride pitting and chloride ion stress. Furthermore, compared to normal austenitic stainless steel High Hub Blinds Flanges, which are more affordable and adaptable but have less corrosion resistance, duplex stainless steel grade flanges have a better tensile strength. High hub blind flange manufacturers in India refer to alloy grade 316, which is a type of stainless steel, as marine grade because of its resistance to corrosion in salt, seawater, and marine environments.
We are a Stainless Steel Weld Neck Flange manufacturer in India, and we offer these Inconel Weld Neck Flange, Hastelloy Weld Neck Flange, Monel Weld Neck Flange, Alloy 20 Weld Neck Flange, Aluminium Weld Neck Flange, Nickel Weld Neck Flange, Duplex Weld Neck Flange, Super Duplex Weld Neck Flange, Incoloy Weld Neck Flange, Copper Weld Neck Flange, Copper Nickel Weld Neck Flange, Brass Weld Neck Flange, 254 Smo Weld Neck Flange, and Titanium Weld Neck Flange in all standards that are common in the world.
| Size | 1/2" (15 NB) to 48" (1200NB) |
| Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings |
| Pressure Ratings | Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Carbon Steel Slip On Flanges/ SORF Flanges | ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8 |
| Stainless Steel Slip On Flanges/ SORF Flanges | ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L |
| Alloy Steel Slip On Flanges/ SORF Flanges | ASTM A182 F1, F5, F9, F11, F22, F91 |
| Special Alloy Slip On Flanges/ SORF Flanges | Duplex, Super Duplex, Nickel Alloys |
| Flange Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Coating/Surface Treatment | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Socket Weld Flange |
| Value Added Services | CNC Machining, Customised Flanges |
| Item ID | Class 150 HH High Hub Blind Flanges Description |
| 1FF .51RHHBLD | 1/2 150 RF High Hub Blind BLIND ASME B16.5 001 lbs |
| 1FF .751RHHBL | 3/4 150 RF High Hub Blind BLIND ASME B16.5 002 lbs |
| 1FF 11RHHBL | 1 150 RF High Hub Blind BLIND ASME B16.5 002 lbs |
| 1FF 1.51RHHBL | 1 1/2 150 RF High Hub Blind BLIND ASME B16.5 004 lbs |
| 1FF 21RHHBL | 2 150 RF High Hub Blind BLIND ASME B16.5 005 lbs |
| 1FF 31RHHBL | 3 150 RF High Hub Blind BLIND ASME B16.5 009 lbs |
| 1FF 41RHHBL | 4 150 RF High Hub Blind BLIND ASME B16.5 017 lbs |
| Item ID | Class 300 HH High Hub Blind Flanges Description |
| 1FF .53RHHBL | 1/2 300 RF HIGH HUB BLIND ASME B16.5 002 lbs |
| 1FF .753RHHBL | 3/4 300 RF HIGH HUB BLIND ASME B16.5 003 lbs |
| 1FF 13RHHBL | 1 300 RF HIGH HUB BLIND ASME B16.5 003 lbs |
| 1FF 1.53RHHBL | 1 1/2 300 RF HIGH HUB BLIND ASME B16.5 006 lbs |
| 1FF 23RHHBL | 2 300 RF HIGH HUB BLIND ASME B16.5 008 lbs |
| Item ID | Class 600 HH High Hub Blind Flanges Description |
| 1FF .756RHHBL | 3/4 600 RF HIGH HUB BLIND ASME B16.5 004 lbs |
| 1FF .56RHHBL | 1/2 600 RF HIGH HUB BLIND ASME B16.5 004 lbs |
| 1FF 16RHHBL | 1 600 RF HIGH HUB BLIND ASME B16.5 004 lbs |
| 1FF 1.56RHHBL | 1 1/2 600 RF HIGH HUB BLIND ASME B16.5 008 lbs |
| 1FF 26RHHBL | 2 600 RF HIGH HUB BLIND ASME B16.5 010 lbs |
Hub Blind Flange is a flange with a hub in the center. It allows for connection with other equipment without coming into contact with media or pressure inside the hub. The Blind Flange creates an effective seal between two pipes, protecting the interior from outside impurities and preventing leaks.
Easy to install.
One of the key benefits of hub blind flanges is their ease of installation. This is because they do not necessitate welding, which may be time-consuming and challenging. Furthermore, hub blind flanges form a tight seal, preventing leaking.
Durable
Another advantage of hub blind flanges is that they are extremely durable. This is because they are built of high-quality materials that can withstand extreme temperatures and pressures. Furthermore, hub blind flanges are less prone to corrosion than other types of flange.
Cost-effective
Another advantage of hub blind flanges is that they are very inexpensive. This is because they cost less to build than other types of flanges. Furthermore, hub blind flanges survive longer than other types of flanges, resulting in long-term cost savings.
| Oil and Gas Processing | Dairy and Food Processing |
| Desalination | Pesticides |
| Pulp and Paper | Sugar Factory |
| Energy industries | Power Plants |
| Ship Building | Fertilizers |
| Machine Building | Nuclear |
| Pharmaceuticals | Chemicals |
| Textile Machinery | Synthetic Fibers |
| Construction | Modern Architecture |
| Refinery & Petrochemicals | Water treatment facilities |
Every Standards have clearly requirements for steel flanges’ marking style, usually the marking words include seller’s Logo, buyer’s Logo (OEM), standard number, flange’s type, flange’s pressure, flange’s size, flange’s material, place of origin, heat number and other words for convenient to trace. If the flanges repaired by welding, it must mark on flanges showing this flange repared by welding. If the flange’s dimensions (OD, ID, PCD, Thickness, Holes number, Holes diameter, Tolerance etc) are different with the normal standard, it also must mark on flanges where it is different with normal ones. Another important place is heat number marking, it is the tracing base for every piece flange, and from the heat number we can trace to the beginning of raw material import.
Carbon Steel High Hub Blinds Flanges and Stainless Steel Socket Weld Flanges are delivered with or without surface protection, as determined by the manufacturer.
The company delivers High Hub Blinds Flanges in standard packaging, without surface protection or end protectors (caps). Special packaging, protective covers, and end protectors (caps) can be agreed upon.