Shrikant Steel Centre is a trusted Reducer Expander Flanges Suppliers in Dubai. Reducer and expander flanges are specialized piping components designed to seamlessly connect pipes of two different nominal diameters. By integrating size reduction or expansion directly into the flange body, these components eliminate the need for separate pipe reducers or expanders, saving valuable layout space, minimizing weld joints, and optimizing flow dynamics across complex piping systems.
As a leading Reducer Expander Flanges Supplier and Stockist in Dubai, Shrikant Steel Centre maintains a ready inventory of precision-engineered reducing and expanding flanges. Designed to handle severe pressure differentials, thermal fluctuations, and corrosive media, our products serve refineries, chemical processing units, offshore platforms, and power generation facilities.
We supplier reducing flanges (where the flange bore is smaller than the standard matching flange NPS) and expander flanges (which feature a larger nominal bore size to increase line capacity at the valve or equipment connection). These are available in Stainless Steel, Carbon Steel, Alloy Steel, Duplex, and Super Duplex material grades.
| Product Name | Reducer & Expander Flanges |
|---|---|
| Available Configurations | Reducing Slip On, Reducing Weld Neck, Expander Flanges, Reducing Threaded & Socket Weld Flanges |
| Applicable Standards | ASME / ANSI B16.5, ASME B16.47 Series A & B, MSS-SP-44, EN 1092-1, DIN |
| Pressure Rating | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS / PN6 to PN400 |
| Nominal Size Range | 1/2" NB to 48" NB (Custom Bore Reduction & Expansion Ratios) |
| Flange Facing Types | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| Testing & Documentation | EN 10204 3.1 MTC, Hydrostatic Testing, PMI Testing, Ultrasonic Inspection, Radiography Test |
| Available Material Grades | |
| Stainless Steel | ASTM A182 F304, F304L, F316, F316L, F310S, F317L, F321, F347 |
| Carbon Steel | ASTM A105, ASTM A350 LF2 (Low Temp), ASTM A694 F42, F52, F60, F65 |
| Alloy Steel | ASTM A182 F1, F5, F9, F11, F12, F22, F91 |
| Duplex / Super Duplex | ASTM A182 F51 / UNS S31803, F53 / UNS S32750, F55 / UNS S32760 |
| Nickel Alloys | Inconel 600/625, Monel 400, Hastelloy C276, Alloy 20 |
Because reducing and expanding flanges experience internal turbulence and pressure transitions, maintaining exact chemical composition standards is essential for uniform corrosion resistance, high tensile strength, and structural integrity under demanding operating conditions.
| Reducer Expander Flanges Chemical Composition (%) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo |
| ASTM A105 | 0.35 max | 0.60-1.05 | 0.035 max | 0.040 max | 0.10-0.35 | 0.30 max | 0.40 max | 0.12 max |
| F304 | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 18.00-20.00 | 8.00-11.00 | - |
| F304L | 0.030 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 18.00-20.00 | 8.00-13.00 | - |
| F316 | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 |
| F316L | 0.030 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.00-18.00 | 10.00-15.00 | 2.00-3.00 |
Every reducing and expander flange undergoes rigorous destructive and non-destructive testing to verify mechanical strength. Below are minimum mechanical requirements across key forged material grades:
| Reducer Expander Flanges Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | UNS / Spec | Tensile Strength (MPa), min | Yield Strength (MPa), min | Elongation (%), min | Hardness (HB), max |
| ASTM A105 | K03504 | 485 | 250 | 22 | 187 HB max |
| A350 LF2 | K11572 | 485 - 655 | 250 | 22 | 197 HB max |
| F304 | S30400 | 515 | 205 | 30 | 187 HB max |
| F316 | S31600 | 515 | 205 | 30 | 187 HB max |
| F51 (Duplex) | S31803 | 620 | 450 | 25 | 290 HB max |
Reducer and expander flanges follow ASME B16.5 outer bolt circle and length-through-hub standards, with modified inner bore dimensions matching the reduced or expanded pipe size. Standard reference dimensions for Class 150 Raised Face (RF) flanges are shown below:
| ASME B16.5 Class 150 Reference Dimensions | |||||
|---|---|---|---|---|---|
| Nominal Flange Size | DN | Flange Outside Diameter (mm) | Flange Thickness (mm) | Bolt Circle Diameter (mm) | Number of Bolts |
| 1" | 25 | 108.0 | 14.2 | 79.4 | 4 |
| 1 1/2" | 40 | 127.0 | 17.5 | 98.4 | 4 |
| 2" | 50 | 152.4 | 19.0 | 120.6 | 4 |
| 3" | 80 | 190.5 | 23.9 | 152.4 | 4 |
| 4" | 100 | 228.6 | 23.9 | 190.5 | 8 |
| 6" | 150 | 279.4 | 25.4 | 241.3 | 8 |
| 8" | 200 | 342.9 | 28.4 | 298.4 | 8 |
| 10" | 250 | 406.4 | 30.2 | 361.9 | 12 |
Leading Reducer Expander Flanges Supplier, Supplier, and Stockist in Dubai, offering reliable piping solutions worldwide.
Shrikant Steel Centre supplies reducing and expander flanges to engineering projects, refineries, and chemical production hubs across all major industrial belts in Dubai.
| City We Supply | |||||
|---|---|---|---|---|---|
| Bengaluru | Mumbai | Chennai | Hyderabad | Kolkata | Pune |
| New Delhi | Ahmedabad | Jaipur | Surat | Salem | Gandhinagar |
| Bhiwandi | Tiruppur | Sivakasi | Jamnagar | Thiruvananthapuram | Rajahmundry |
| Bhubaneswar | Vijaywada | Firozabad | Pithampur | Rajkot | Bharuch |
| Panna | Raipur | Cochin | Ludhiana | Panipat | Durgapur |
| Peenya | Hosdurg | Channapatna | Kharagpur | Nashik | Bareilly |
We export certified reducing and expander flanges globally to clients across the Middle East, Europe, Asia, and the Americas. Contact us for technical support, dimension drawings, and competitive quotes.
| Countries We Supply | ||||
|---|---|---|---|---|
| Saudi Arabia | Oman | Kuwait | Netherlands | Iran |
| Bahrain | Qatar | UAE | Africa | China |
| Nigeria | Mexico | Canada | Venezuela | United Kingdom |
| United States | South Africa | Malaysia | Bangladesh | Turkey |
| Singapore | Sri Lanka | Australia | Brazil | Germany |
| France | Italy | South Korea | Poland | Belgium |
