For Domestic (for India) Email: sales3@jfengg.com / Phone: +91 9833323564 / +91-22-6639 3672
For Export (for other than India) Email: export3@jfengg.com / Phone: +91-9833323751 / +91-22-23634937
JF Engineering Products LLP

Alloy Steel Flanges

 Alloy Steel Flanges

ASME SA193 B7 Blind Flange, Grade B7 RTJ Flange, Grade B7 Threaded Flange, ASTM A193 B7 Flat Flange, Grade B7 Longweld Neck Flange, Alloy Steel B7 tongue & groove Flanges, Alloy Steel B7 Forge Flange, ASTM A193 B7 Orifice Flange, ASME SA193 B7 Square Flange, ASME SA193 B7 Weld Neck Flange, ASME SA193 B7 Lap Joint Flange.

Alloy Steel B7 SORF Flange Stockist, Grade B7 Longweld Neck Flange Supplier, ASTM A193 B7 Flat Flange , ASME SA193 B7 Lap Joint Flange Stockist, ASTM A193 B7 Orifice Flange Manufacturer, ASTM A193 B7 Slip On Flange Supplier, ASME SA193 B7 Square Flange Supplier, Alloy Steel B7 Reducing Flange Exporter, ASTM A193 B7 Socketweld Flange Stockist.

Specifications Of Alloy Steel Flanges
Standards ANSI/ASME B16.5, EN Flanges,  BS 10,  B16.47 Series A & B,  EN-1092,  ASME Flanges,  BS Flanges,  B16.48,  DIN,  DIN Flanges,  GOST Flanges,  ANSI Flanges,  BS4504.
Size 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
 Pressure Rating Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Production technique Forged, Heat treated and machined
Special design
As per your drawing
AS, ANSI, BS, DIN and JIS
15 NB (1/2") to 200 NB (8")
Equal and Reducing Configurations
Connect Type/ Flange Face Type Ring Type Joint (RTJ),  Small Tongue, Raised Face (RF),  Lap-Joint Face (LJF),  Small Male-Female (SMF),  Flat Face (FF),  Large Tongue & Groove,  Large Male-Female (LMF).
Largest Bore Diameter Sizes NPS ≤ 10
Minimum & Maximum Size 1/2" To 48"
Origin Indian / Japan / Korean / West Europe / USA
JIS Standard 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
A182 Flange EN 6Bar 10Bar 16Bar 25Bar 40Bar
Test Certificates
EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc.
 Application Gas,  Power,  Chemical,  Metallurgy, Petroleum,  Shipbuilding,  Construction etc.
Different Type Of Alloy Steel Flanges

Dimensions Of Alloy Steel Flanges
Dimensions Of  Steel Flanges
Nom. Pipe
Size
O T R X No./Dia. of Holes Bolt
Circle Dia.
L2 H B2 L B r L3 B3 D
1/2 3.5 0.44 1.38 1.19 4-0.62 2.38 1.88 0.84 0.62 0.62 0.88 0.12 0.62 0.9 0.38
3/4 3.88 0.5 1.69 1.5 4-0.62 2.75 2.06 1.05 0.82 0.62 1.09 0.12 0.62 1.11 0.44
1 4.25 0.56 2 1.94 4-0.62 3.12 2.19 1.32 1.05 0.69 1.36 0.12 0.69 1.38 0.5
1-1/4 4.62 0.62 2.5 2.31 4-0.62 3.5 2.25 1.66 1.38 0.81 1.7 0.19 0.81 1.72 0.56
1-1/2 5 0.68 2.88 2.56 4-0.62 3.88 2.44 1.9 1.61 0.88 1.95 0.25 0.88 1.97 0.62
2 6 0.75 3.62 3.06 4-0.75 4.75 2.5 2.38 2.07 1 2.44 0.31 1 2.46 0.69
2-1/2 7 0.88 4.12 3.56 4-0.75 5.5 2.75 2.88 2.47 1.12 2.94 0.31 1.12 2.97 0.75
3 7.5 0.94 5 4.25 4-0.75 6 2.75 3.5 3.07 1.19 3.57 0.38 1.19 3.6 0.81
3-1/2 8.5 0.94 5.5 4.81 8-0.75 7 2.81 4 3.55 1.25 4.07 0.38 1.25 4.1 0.88
4 9 0.94 6.19 5.31 8-0.75 7.5 3 4.5 4.03 1.31 4.57 0.44 1.31 4.6 0.94
5 10 0.94 7.31 6.44 8-0.88 8.5 3.5 5.56 5.05 1.44 5.66 0.44 1.44 5.69 0.94
6 11 1 8.5 7.56 8-0.88 9.5 3.5 6.63 6.07 1.56 6.72 0.5 1.56 6.75 1.06
8 13.5 1.12 10.62 9.69 8-0.88 11.75 4 8.63 7.98 1.75 8.72 0.5 1.75 8.75 1.25
10 16 1.19 12.75 12 12-1.00 14.25 4 10.75 10.02 1.94 10.88 0.5 1.94 10.92 1.31
12 19 1.25 15 14.38 12-1.00 17 4.5 12.75 12 2.19 12.88 0.5 2.19 12.92 1.56
14 21 1.38 16.25 15.75 12-1.12 18.75 5 14 13.25 2.25 14.14 0.5 3.12 14.18 1.63
16 23.5 1.44 18.5 18 16-1.12 21.25 5 16 15.25 2.5 16.16 0.5 3.44 16.19 1.75
18 25 1.56 21 19.88 16-1.25 22.75 5.5 18 17.25 2.69 18.18 0.5 3.81 18.2 1.94
20 27.5 1.69 23 22 20-1.25 25 5.69 20 19.25 2.88 20.2 0.5 4.06 20.25 2.13
22 29.5 1.81 25.25 24.25 20-1.38 27.25 5.88 22 21.25 3.13 22.22 0.5 4.25 22.25 2.38
24 32 1.88 27.25 26.12 20-1.38 29.5 6 24 23.25 3.25 24.25 0.5 4.38 24.25 2.5

Weight Chart Of Alloy Steel Flanges
Normal Sizes In inch Dimension Flanges Dimensional Sizes 1/2 inch. to 2 1/2 inch.
Class 125
Class 150
Class 300 Class 400 Class 600 Class 900 Class 1500 Class 2500
inch. mm inch. millimeter inch. mm inch. mm inch. mm inch. mm inch mm
1/2 A 3 1/2 88.9 3 3/4 95.2 3 3/4 95.2 3 3/4 95.2 4 3/4 121 4 3/4 121 5 1/4 133.4
b 7/16 11.1 9/16 14.3 9/16 14.3 9/16 14.3 7/8 22.2 7/8 22.2 1 3/16 30.2
D2 1 3/8 34.9 1 3/8 34.9 1 3/8 34.9 1 3/8 34.9 1 3/8 34.9 1 3/8 34.9 1 3/8 34.9
D1 2 3/8 60.3 2 5/8 66.7 2 5/8 66.7 2 5/8 66.7 3 1/4 82.6 3 1/4 82.6 3 1/2 88.9
n 4 4 4 4 4 4 4 4 4 4 4 - 4 44
d 5/8 15.9 5/8 15.9 5/8 15.9 5/8 15.9 7/8 22.2 7/8 22.2 7/8 22.2
3/4 A 3 7/8 98.4 4 5/8 117.5 4 5/8 117.5 4 5/8 117.5 5 1/8 130 5 1/8 130 5 1/2 139.7
b 1/2 12.7 5/8 15.9 5/8 15.9 5/8 15.9 1 25.4 1 25.4 1 1/4 31.8
D2 1 11/16 42.9 1 11/16 42.9 1 11/16 42.9 1 11/16 42.9 1 11/16 42.9 1 11/16 42.9 1 11/16 42.9
D1 2 3/4 69.8 3 1/4 82.5 3 1/4 82.5 3 1/4 82.5 3 1/2 88.9 3 1/2 88.9 3 3/4 95.2
n 4 4 4 4 4 4 4 4 4 4 4 - 4 44
d 5/8 15.9 3/4 19 3/4 19 3/4 19 7/8 22.2 7/8 22.2 7/8 22.2
1 A 4 1/4 108 4 7/8 123.8 4 7/8 123.8 4 7/8 123.8 5 7/8 149.2 5 7/8 149.2 6 1/4 159
b 9/16 14.3 11/16 17.5 11/16 17.5 11/16 17.5 1 1/8 28.6 1 1/8 28.6 1 3/8 34.9
D2 2 50.8 2 50.8 2 50.8 2 50.8 2 50.8 2 50.8 2 50.8
D1 3 1/8 79.4 3 1/2 88.9 3 1/2 88.9 3 1/2 88.9 4 102 4 102 4 1/4 108
n 4 4 4 4 4 4 4 4 4 4 4 4 4 4
d 5/8 15.9 3/4 19 3/4 19 3/4 19 1 25.4 1 25.4 1 25.4
1 1/4 A 4 5/8 117.5 5 1/4 133.4 5 1/4 133.4 5 1/4 133.4 6 1/4 159 6 1/4 159 7 1/4 184.2
b 5/8 15.9 3/4 19 13/16 20.6 13/16 20.6 1 1/8 28.6 1 1/8 28.6 1 1/2 38.1
D2 2 1/2 63.5 2 1/2 63.5 2 1/2 63.5 2 1/2 63.5 2 1/2 63.5 2 1/2 63.5 2 1/2 63.5
D1 3 1/2 88.9 3 7/8 98.4 3 7/8 98.4 3 7/8 98.4 4 3/8 111 4 3/8 111 5 1/8 130
n 4 4 4 4 4 4 4 4 4 4 4 4 4 4
d 5/8 15.9 3/4 19 3/4 19 3/4 19 1 25.4 1 25.4 1 1/8 28.6
1 1/2 A 5 127 6 1/8 155.6 6 1/8 155.6 6 1/8 155.6 7 177.8 7 177.8 8 203
b 11/16 17.5 13/16 20.6 7/8 22.2 7/8 22.2 1 1/4 31.8 1 1/4 31.8 1 3/4 44.5
D2 2 7/8 73 98 2 7/8 73 2 7/8 73 2 7/8 73 2 7/8 73 2 7/8 73 2 7/8 73
D1 3 7/8 4 4 1/2 114 4 1/2 114 4 1/2 114 4 7/8 124 4 7/8 124 5 3/4 146
n 4 4 4 4 4 4 4 4 4 4 4 4 4 4
d 5/8 . 15.9 7/8 22.2 7/8 22.2 7/8 22.2 1 1/8 28.6 1 1/8 28.6 1 1/4 31.8
2 A 6 152.4 6 1/2 165.1 6 1/2 165.1 6 1/2 165.1 8 1/2 215.9 8 1/2 215.9 9 1/4 234.9
b 3/4 19 7/8 22.2 1 25.4 1 25.4 1 1/2 38.1 1 1/2 38.1 2 50.8
D2 3 5/8 92.1 3 5/8 92.1 3 5/8 92.1 3 5/8 92.1 3 5/8 92.1 3 5/8 92.1 3 5/8 92.1
D1 4 3/4 121 5 127 5 127 5 127 6 1/2 165.1 6 1/2 165.1 6 3/4 171
n 4 4 8 8 8 8 8 8 8 8 8 8 8 8
d 3/4 19 3/4 19 3/4 19 3/4 19 1 25.4 1 25.4 1 1/8 28.6
2 1/2 A 7 177.8 7 1/2 190.5 7 1/2 190.5 7 1/2 190.5 9 5/8 244 9 5/8 244 10 1/2 266.7
b 7/8 22.2 1 25.4 1 1/8 28.6 1 1/8 28.6 1 5/8 41.3 1 5/8 41.3 2 1/4 57.2
D2 4 1/8 104.8 4 1/8 104.8 4 1/8 104.8 4 1/8 104.8 4 1/8 105 4 1/8 105 4 1/8 105
D1 5 1/2 139.7 5 7/8 149.2 5 7/8 149.2 5 7/8 149.2 7 1/2 190.5 7 1/2 190.5 7 3/4 197
n 4 4 8 8 8 8 8 8 8 8 8 8 8 8
d 3/4 19 7/8 22.2 7/8 22.2 7/8 22.2 1 1/8 28.6 1 1/8 28.6 1 1/4 31.8

Price List Of Alloy Steel Flanges
ASTM A182 Alloy Steel Slip On Flanges USD $5.25 - $10.55 / Piece (FOB Price) on request
Alloy Steel Steel Weld Neck Flanges USD $5.25 - $10.55 / Piece (FOB Price) on request
Alloy Steel Lap Joint Flanges USD $5.25 - $10.55 / Piece (FOB Price) on request
Alloy Steel Threaded Flanges USD $5.25 - $10.55 / Piece (FOB Price) on request
Alloy Steel Steel Socket Weld Flanges USD $5.25 - $10.55 / Piece (FOB Price) on request
Marking and 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 pipes are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.


  • Wooden Boxes
  • Wooden Pallets
  • Shrink-Wrapped
  • Carton Boxes
  • Wooden Boxes
  • Marking and Packing
    Quality Assurance
    Quality Assurance

    At JF Engineering Products LLP, all fasteners 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.


    Testing

    Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report


    • Positive Material Identification - PMI Testing
    • Chemical Analysis - Spectro Analysis
    • Mechanical Testing Such as Tensile, Elongation, Reduction of Area
    • Micro Test
    • Macro Test
    • Hardness Test
    • Pitting Resistance Test
    • Intergranular Corrosion (IGC) Test
    • Flaring Test
    • Flattening Test
    • Hydrostatic Test
    • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
    • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
    • Radiography Test
    • Dye Penetrant Test (DP Test)
    Testing
    SHIPPING POLICY
    SHIPPING POLICY

    Delivery time and delivery dates are based on the "type and quantity" of steel ordered. Our sales team will provide a delivery schedule when quoting to you. On rare occasions the delivery schedule may change so please check with our sales department when placing any orders.

    Orders will be sent out within 2-3 business days, and may take up to 5-10 business days in transit. If fastener is out of stock, orders may take up to 2-4 weeks to ship. JF Engineering Products LLP will notify buyer if this situation occurs.


    Uses & Application

    JF Engineering Products LLP take immensure pleasure in introducing itself as one of the leading Manufacturer & Exporter of high quality fasteners to meet the customer ultimate requirements in the fields of:


  • Construction
  • Bridges
  • Petrochemical Industry
  • Ship Building
  • Engineering
  • General Structural Purposes
  • Offshore and Onshore Services
  • Power Generation Industries
  • Food Processing Industries
  • Oil & Gas Industries
  • Sugar Industries
  • Long Radius Bend

    Our Products