Blind Flanges

Blind Flanges Manufacturers

Rishabh Steel Industries is one of eminent manufacturers and suppliers of high grade Blind Flanges. Rishabh Steel Industries overseas offers a commendable range of Blind Flanges, for the prestigious client with competitive price. Export packaging is grade towards the protection, handling and transport of Blind Flanges by air or sea freight, as such shares many characteristics with export and transport Blind Flanges packing. Backed by a diligent teen of professional, we are engaged in offering an excellent quality range of Blind Flanges.

Blind Flanges Specification

Type Blind Flanges
Standards ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Outside Diameter ≤ 24 = 1.6 mm
> 24 = ± 3.2 mm
Inside Diameter ≤ 10 = ± 0.8 mm
> 12 = + 1.6 mm / - 0 mm
Diameter Contact Face 1.6 mm RF = ±0.8 mm
6.35 mm RF = ±0.4 mm
Tongue & Groove = ±0.4 mm
Male-Female = ±0.4 mm
Outside Diameter of Hub ≤12 = + 2.4 mm/ - 1.6 mm
≥ 14 = ± 3.2 mm
Diameter of Counterbore Same as for Inside Diameter
Drilling Bolt Circle = 1.6 mm
Bolt Hole Spacing = ±0.8 mm

Eccentricity Bolt Circle with Respect to Facing
≤2.1/2 = 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
Pressure Ratings: Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Order Accept custom order
Quality Assurance

All fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All buttweld fittings are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.#Protected by End Caps.

Value Added Services
  • Hot Dipped Galvanizing
  • CNC Machining
  • Customised Flanges
Test Certificates Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report

 

Carbon Steel Lap Joint 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 Lap Joint Flanges: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Lap Joint Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Lap Joint Flanges: Duplex, Super Duplex, Nickel Alloys
Flange Face Type: Weld neck Flate Face (WNFF), Weld neck Raised Face (WNRF), Weld neck Ring Type Joint (WNRTJ)
Coating/Surface Treatment: Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized