ASTM A182 F91 Blind Flange

ASME UNS K90901 BLRF Flange Manufacturer in India

Nitron Alloys Overseas is among the leading manufacturer, supplier, exporter and stockiest of ASASTM A182 F91 Blind Flange . We have an exclusive range of these Flanges in conventional and non-conventional forms manufactured in different sizes, shapes, and tolerances. Our experience can be seen in our product. We can guarantee of their excellent performance in different conditions. We follow international standards while manufacturing these Flanges. The appreciation of quality and performance of our Flanges reflects in the form of their increasing demand.

No doubt that AS ASTM A182 F91 Blind Flange from Nitron Alloys Overseas has numerous excellent features and characteristics to offer, making it one of the highly used types of Flange for uncountable applications in various industries. The different features these Flanges offer are high tensile strength and toughness as a result of rugged construction. Excellent thermal properties, including heat resistance, high load-bearing capacity, and durability. These Flanges also are resistant to general corrosion as well as pitting and oxidation. They also oppose crevice corrosion and stress corrosion cracking.

Nitron Alloys Overseas procure high-quality raw material from certified suppliers to make AS ASTM A182 F91 Blind Flange . The manufacturing operations are executed under the strict observation of professional experts. The work gets simplified with the effective use of the latest technologies and improved working strategies, which are the result of consistent efforts in the form of research by our talented engineers. The responsibility to operate these machines and tools is given to the well trained and experienced workforce. The dedication they work with is outstanding and makes them different from the other company’s staff. The only aim we want to accomplish every time is the complete fulfilment client’s needs. Our Flanges are made to have accurate dimensions and excellent surface finishing.

AS ASTM A182 F91 Blind Flange that Nitron Alloys Overseas offer are sent to the customers only after getting inspected for desired qualities and abilities. The inspection is carried out at various stages of manufacturing through several tests. Nitron Alloys Overseas believe that our task doesn’t get completed without making timely deliveries. Our commitments over the safety of Flanges during transportation are inevitable.

Specification of Alloy Steel F91 Blind Flanges

Spec bag
Blind Flange

Specifications: ASTM A182 / ASME SA182

Dimensions:ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard: ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

Size: 1/4" - 48"

Class/Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type: flat face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Types of Alloy Steel F91 Blind Flanges

Alloy Steel F91 Flat Face Blind Flanges

AS ASTM A182 F91 Flat Face Blind Flanges

Alloy Steel F91 Raised Face Blind Flanges

AS ASTM A182 F91 Raised Face Blind Flanges

Equivalent Grades for Alloy Steel F91 Blind Flanges

Alloy Steel F91 K90901 1.4903

Alloy Steel F91 Blind Flanges Chemical Composition

Grade C Mn Si P S Cr Mo
Alloy Steel F91 0.08 - 0.12 0.3 - 0.6 0.5 0.01 0.02 8.5 - 9.5 0.85 - 1.05

Mechanical Properties of Alloy Steel F91 BLRF Flanges


Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
F91 585 415 20 - 248 max