Mild Steel Flanges Manufacturers

Top Mild Steel Flanges in Mumbai

Why Are Mild Steel Flanges Significant to Industrial Usage?

At Randhir Metal And Alloys Pvt. Ltd., we provide high-quality mild steel flanges, well renowned for their strength, reliability, and versatility. We offer one of the Top Mild Steel Flanges in Mumbai and are designed for different industrial applications to exhibit superior performance in construction, chemical processing, and much more. In fact, the raw material used in the flange is extremely durable and pressure-resistant mild steel, which in turn makes it corrosion-resistant, refraining from the degradation caused by many industries.

  • High Strength: Reliable for heavy-duty applications.
  • Corrosion Resistance: Withstands environmental and chemical exposure.
  • Customizable Sizes: Available in various sizes for specific needs.
  • Long Service Life: Ensures minimal maintenance and long-term performance.
What Makes Us the Best Choice for Manufacturing?

Get Premium Products Directly from Top Mild Steel Flanges Manufacturers in Mumbai

Our experienced team ensures that precise and durable flanges are produced that meet the demands of various industries. As one of the Top Mild Steel Flanges Manufacturers in Mumbai, we use advanced technology to produce the highest quality flanges. With quality, innovation, and customer satisfaction as our priorities, we make sure every product is reliable and performance-oriented.

  • Advanced Manufacturing Techniques: Using the latest technology for precision.
  • Highly professional workforce: To give the best in quality.
  • Specific solutions: For unique industrial requirements
  • Stringent Quality Control: Steadfast reliability of the products through rigorous testing
How Do We Help Our Clients Nationwide in India?

Looking for Best Mild Steel Weld Neck Flange Suppliers in India?

We are suppliers of flanges that are known for their durability and pressure resistance. Our supply chain is very efficient, ensuring all products are delivered on time to clients all over the country. As one of the Best Mild Steel Weld Neck Flange Suppliers in India, we have stock of various sizes and specifications catering to the various requirements of the customers, and hence we can be considered a reliable partner for all your flange needs.

  • Availability all over India: Reliable delivery all over the nation.
  • Various products: Varying sizes and specifications to suit individual requirements.
  • Reasonable price: Quality products at the most reasonable rates.
  • Dedicated customer care: Professional staff waiting to serve.
Material Specification Of : Alloy Steel Flanges
Standard Cover : pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing
Contact Faces RTJ (Ring Type Joint), FF (Flat Face), RF (Raised Face), T/G (Tongue And Groove ), M/F (Male And Female)
Size Chart Normal Pipe Size 1/2 to NPS 24"
Thickness Normal Pipe Size ≤ 18
Bore Diameter Normal Pipe ≤ 10
Flanges Standards EN 1092-1, JIS, ASME B16.5, ASME B16.47 type A, UNI, DIN
Pressure Rating Class 150 To Class 2500
High Temperature Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature Above -29 Degree C (−20°F)
Common Types Of Flanges: Slip On (SORF), Weld Neck (WNRF), Blind (BLRF), Lap Joint (Loose), Threaded (NPT), Socket-Weld (SWRF)
Special Types Of Flanges : Nipoflange, Elboflange, Latroflange, Swivel Flange, Expanding Flange, Reducing Flange, Weldoflange
Marking Standard Name of Manufacturer
Schedule
Type of Flange Facing
Nominal Pipe Size
Pressure Class
ASME B16 Designation
Bolt Type high strength bolts
medium strength bolts
low strength bolts
European Standard Flanges JIS B2220 Flanges (5k to 30k) and KS1503 flanges
Russian-Standard Flanges GOST 12820 / 12821-80, DIN, UNI, EN 1092-1
South African Standard Flanges SANSflanges And SABS flanges
Surface Finish smooth, concentric serrated, stock
Gaskets Types Full Face Gasket
Flat Ring Gasket
Metallic Ring Gakset
Advantages Of Pipe Flange Used to Connect Pipe System
Easy Repair Pipe System
Assembled Without Welding
ASTM A105 Carbon Steel Blind Flange Price List
TYPE OF FLANGES SIZE (INCH) MATERIAL GRADE CLASS PRICE IN INDIA (INR)
BLIND FLANGES 3/4" ALLOY STEEL ASTM A182 F5 CLASS 150 160.00
BLRF 1" ALLOY STEEL ASTM A182 F5 CLASS 150 150.32
BLRF 1-1/2" ALLOY STEEL ASTM A182 F5 CLASS 150 210.00
BLRF 2" ALLOY STEEL ASTM A182 F5 CLASS 150 300.00
BLRF 3" ALLOY STEEL ASTM A182 F11 CLASS 150 379.76
SLIP ON FLANGES 2" ASTM A182 F11 ALLOY STEEL CLASS 150 240.34
SORF 3" ASTM A182 F11 ALLOY STEEL CLASS 150 406.34
SORF 10" ASTM A182 F11 ALLOY STEEL CLASS 150 4500.34
WELD NECK FLANGES 2" X SCH STD ASTM A182 F22 ALLOY STEEL CLASS 150 400.00
WNRF 3" X SCH STD ASTM A182 F22 ALLOY STEEL CLASS 150 665.00
WNRF 4" X SCH STD ASTM A182 F22 ALLOY STEEL CLASS 150 799.00
WNRF 6" X SCH STD ASTM A182 F22 ALLOY STEEL CLASS 150 1505.00
SOCKET WELD FLANGES 3/4" X SCH XS ASTM A182 F22 ALLOY STEEL CLASS 150 199.00
SWRF 1" X SCH XS ASTM A182 F22 ALLOY STEEL CLASS 150 295.76
SWRF 1-1/2” X SCH XS ASTM A182 F22 ALLOY STEEL CLASS 150 480.00

ASTM A182 AS Flanges Equivalent Table

Group Of Material Name Type Of UNS Number Forging Specification Casting Specification Equivalent DIN Number DIN WNR. Number Application For
Alloy Steel Moly Steel C-1/2Mo K12822 A182-F1 cl2 A217-WC1 15M03 1.5415 Up to 470ºC* (875ºF)
Chrome Moly 1.1/4Cr-1/2Mo K11572 ASTM A182-F11 cl2 A217-WC6 13CRM044 1.7335 Up to 593ºC (1100ºF)
2.1/4Cr-1Mo K21590 ASTM A182-F22 cl3 A217-WC9 10CRM0910 1.7380 Up to 593ºC (1100ºF), HP steam
5Cr-1/2Mo K41545 ASTM A182-F5/F5a A217-C5 12CRMO195 1.7362 High temp refinery service
9Cr-1Mo K90941 ASTM A182-F9 A217-C12 X 12 CrMo 9 1 1.7386 High temp erosive refinery service
9Cr-1Mo-V ASTM A182-F91 A217-C12A X 10 CrMoVNb 9 1 1.4903 High pressure steam

Hight Alloy Steel Flange Pressure Rating Class

ANSI/ASME B16.5 Alloy Steel Flanges Pressure Rating
Temperature °F Class 150 Class 300 Class 400 Class 600 Class 900 Class 1500 Class 2500
-20 to 100 265 695 925 1390 2085 3470 5785
200 260 680 905 1360 2035 3395 5660
300 230 655 870 1305 1955 3260 5435
400 200 640 855 1280 1920 3200 5330
500 170 620 830 1245 1865 3105 5180
600 140 605 805 1210 1815 3025 5040
650 125 590 785 1175 1765 2940 4905
700 110 570 755 1135 1705 2840 4730
750 95 530 710 1065 1595 2660 4430
800 80 510 675 1015 1525 2540 4230
850 65 485 650 975 1460 2435 4060
900 50 450 600 900 1350 2245 3745
950 35 280 375 560 845 1405 2345
1000 20 165 220 330 495 825 1370

ASME A182 Alloy Steel Flanges Chemical Composition

Properties Of Element Low Alloy Steel Flanges Medium Alloy Steel Flanges
ASTM A182 F11 Class 2 ASTM A182 F22 Class 3 ASTM A182 F5 ASTM A182 F9
CARBON 0.10-0.20 0.05-0.15 0.15 MAXIMUM 0.15 MAXIMUM
MANGANESE 0.30-0.80 0.30-0.60 0.30-0.60 0.30-0.60
PHOSPHORUS MAXIMUM 0.040 0.040 0.03 0.030
SULFUR MAXIMUM 0.040 0.040 0.03 0.030
SILICON 0.50-1.00 0.50 MAXIMUM 0.50 MAXIMUM 0.50-1.00
NICKEL MAXIMUM 0.50
CHROMIUM 1.00-1.50 2.00-2.50 4.00-6.00 8.0-10.0
MOLYBDENUM 0.44-0.65 0.87-1.13 0.44-0.65 0.90-1.10
OPPER MA
COLUMBIUM MAXIMUM
VANDIUM MAXIMUM
TENSILE STRENGTH PSI (MPA) 70,000 (485) 75,000 (515) 70,000 (485) 85,000 (585)
YIELD STRENGTH PSI MINIMUM 40,000 (275) 45,000 (310) 40,000 (275) 55,000 (380)
ELONGATION 2” % MINIMUM 20 20 20 20
REDUCTION AREA % MINIMUM 30 30 35 40
HARDNESS (HB) MAXIMUM* 143 ~ 207 156 ~ 207 143 ~ 217 179 ~ 217

Alloy Steel Blind Flange Mechanical Properties

Gr. Tensile Strength Yield Strength (0.2%Offset) Elongation
ASTM/ASME A182 F1 275 485 20 %
ASTM/ASME A182 F5 275 485 20 %
ASTM/ASME A182 F9 380 585 20 %
ASTM/ASME A182 F11 205 415 20 %
ASTM/ASME A182 F12 275 485 20 %
ASTM/ASME A182 F22 205 415 20 %
ASTM/ASME A182 F91 380 585 20 %
 

AS 2129 Flanges Tolerance Chart

Alloy Steel Flanges Tolerance
A Outside Diameter (O.D.)
  • When Outside Diameter (O.D.) is 24" or less: ±1/16" (1.6 mm)
  • When Outside Diameter (O.D.) is over 24": ±1/8" (3.2 mm)
D Inside Diameter
  • 10" and smaller: ±1/32" (0.8 millimeter)
  • 12" thru 18": +1/8" (3.2 millimeter)
  • 20" and larger: -1/16" (1.6 millimeter)
B Diameter of contact face
  • 1/16" raised face: ±1/32" (0.8 millimeter)
  • 1/4" Raised Face (RF), Tongue & Groove (T/G), (male & female), (m/f): ±1/64" (0.4 mm)
J Diameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6 millimeter)
  • When hub base is over 24": ±1/8" (3.2 millimeter)
H Diameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4 millimeter), -1/32" (0.8 millimeter)
  • 6" and larger: +5/32" (4.0 millimeter), -1/32 (0.8 millimeter)
P Drilling
  • Bolt circle: ±1/16" (1.6 millimeter)
  • Bolt hole spacing: ±1/32" (0.8 millimeter)
Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8 millimeter) max.
  • 3" and larger ±1/16" (1.6 millimeter) max.
C Thickness
  • 18" and smaller: ±1/8" (3.2 millimeter), -0"
  • 20" and larger: ±3/16" (4.8 millimeter), -0"
K Length of hub
  • 10" and smaller: ±1/16" (1.6 millimeter)
  • 12" and larger: ±1/8" (3.2 millimeter)

Alloy Steel Weld Neck Flange Gasket Size Chart

NPS Gasket I.D. Gasket O.D.
Class 150 Class 300 Class 400 Class 600 Class 900
1/2 0.84 1.875 2.125 2.125 2.125 2.50
3/4 1.06 2.25 2.625 2.625 2.625 2.75
1 1.31 2.625 2.875 2.875 2.875 3.125
1 1/4 1.66 3 3.25 3.25 3.25 3.50
1 1/2 1.91 3.375 3.75 3.75 3.75 3.875
2 2.38 4.125 4.375 4.375 4.375 5.625
2 1/2 2.88 4.875 5.125 5.125 5.125 6.50
3 3.50 5.375 5.875 5.875 5.875 6.625
4 4.50 6.875 7.125 7.00 7.625 8.125
5 5.56 7.75 8.50 8.375 9.50 9.75
6 6.62 8.75 9.875 9.75 10.50 11.375
8 8.62 11 12.125 12.00 12.625 14.125
10 10.75 13.375 14.25 14.125 15.75 17.125
12 12.75 16.125 16.625 16.50 18.00 19.625
Why We Are Traded Globally for Flange Exports?

Best Mild Steel Weld Neck Flange Exporters in India

Our products go with secure packing and assured shipments, ensuring delivery in an optimal state. As one of the Best Mild Steel Weld Neck Flange Exporters in India, we will give our high-quality flanges to esteemed customers worldwide, keeping up the international standards with them so as to cater specifically to the respective requirements of varied industries all across the globe.

  • Global Reach: Our export is aimed at service delivery to different countries' industries.
  • Reliable Packaging: Well protected without damage at receipt.
  • International Compliant: Standard and certification, worldwide.
  • Adequate shipping: Quick as well as global delivery.
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Randhir Metal & Alloys PVT. LTD. - Factory & Products Videos

Experience the craftsmanship behind Randhir Metal And Alloys Pvt. Ltd. through our factory and product videos. Dive into our state-of-the-art production processes and see how we transform raw materials into top-quality metal and alloy solutions. Our videos showcase the precision, innovation, and dedication that drive our commitment to excellence in every product we deliver.

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