Industrial Pipe Flanges manufacturer in UAE
What are Pipe Flanges?
A pipe flange is a protruded rim that help in making a connection between two or more piping equipment. Pipe Flanges can combine or dismantle piping systems or mobile installations to create a transition between dissimilar materials. These Flanges allow room for easy access, cleaning, and inspection. They can be bolted, welded, or screwed following different procedures. There are different Flange Types that are designed to suit different project requirements.
Steel flange material and grades
Steel Flanges available in various material and grades as per ASME B16.5 specification
Looking for high pressure flange types? Click on the flange types for specification and dimensions
Buy Pipe Flanges in Class 150/300/900 and 2500 for refinery & petrochemical industry in Middle East
Click on the below standard to view the steel flange dimensions and weights
- ASME B16.5 flange
- ASME B16.47 flange
- ASME B16.36
- BS 3293
- En 1092-1
- EN 1092-2
- Mss Sp 44
- Awwa C207
- ISO flange
- Australian flange
- Korean flange
Manufacturing methods of steel flanges
- Forged flange as per ASME B16.5
- Plate flange as per ASME B16.5
- Cast flanges (MSS flanges) as per ASTM A341, MSS SP-51
| Raised Face (RF) | Flat Face (FF) | Ring-Type Joint (RTJ) |
|---|---|---|
| Marking symbol : ASME B16.5 RF
Height of raised face
|
Marking symbol : ASME B16.5 FF | Marking symbol : ASME B16.5 RTJ
|
| Tongue-and-Groove (T&G) | Male-and-Female (M&F) | |
| Marking symbol : ASME B16.5 T&G | Marking symbol : ASME B16.5 M&F
Types:
|
Flange bolt hole number & diameter
| Flange class | Numbers of bolt | Diameter of bolt (in mm) |
|---|---|---|
| 150lb | 12 | 25.4 |
| 300 | 16 | 28.6 |
| 400 | 16 | 34.9 |
| 600 | 20 | 34.9 |
| 900 | 20 | 38.1 |
| 1500 | 16 | 54 |
| 2500 | 12 | 73 |
- Sch 10
- Sch 20
- Sch 30
- STD Wall
- Sch 40
- Sch 60
- EXT Hvy
- Sch 80
- Sch 100
- Sch 120
- Sch 140
- Sch 160
- XX Hvy
Torque sequence for steel flanges
| Type | Sequence for Bolt/ Stud Tightening |
|---|---|
| 4 bolt flanges | 1, 3, 2, 4 |
| 8 bolt flanges | 1, 5, 3, 7, 2, 6, 4, 8 |
| 12 bolt flanges | 1, 7, 4, 10, 2, 8, 5, 11, 3, 9, 6, 12 |
| 16 bolt flanges | 1, 9, 5, 13, 3, 11, 7, 15, 2, 10, 6, 14, 4, 12, 8, 16 |
| 20 bolt flanges | 1, 11, 6, 16, 3, 13, 8, 18, 5, 15, 10, 20, 2, 12, 7, 17, 4, 14, 9, 19 |
| 24 bolt flanges | 1, 13, 7, 19, 4, 16, 10, 22, 2, 14, 8, 20, 5, 17, 11, 23, 6, 18, 12, 24, 3, 15, 9, 21 |
| 28 bolt flanges | 1, 15, 8, 22, 4, 18, 11, 25, 6, 20, 13, 27, 2, 16, 9, 23, 5, 19, 12, 26, 3, 17, 10, 24, 7, 21, 14, 28 |
| 32 bolt flanges | 1, 17, 9, 25, 5, 21, 13, 29, 3, 19, 11, 27, 7, 23, 15, 31, 2, 18, 10, 26, 6, 22, 14, 30, 8, 24, 16, 32, 4, 20, 12, 28 |
| ASME B16.5 | ASME B16.47 Series A | ASME B16.47 Series B | ASME B16.36 |
|---|---|---|---|
|
|
|
|
- 7307.21 (for SS)
- 7307.29 (for SS)
- 7307.91 (For CS)
- 7307.99 (For CS)
- 7307.91 (For Inconel)
- 7307.99 (For Inconel)
- Marking on Cast flanges: ASME/ ASTM specification, grade, size, rating (class 150-2500) melt number and manufacturer / supplier logo
- Plate flanges marking: ASME/ ASTM specification, grade, size, rating (class 150-2500) and manufacturer / supplier logo
- Forged flanges marking: ASME/ ASTM specification, grade, size, rating (class 150-2500) and manufacturer / supplier logo
- Ring-Joint Flanges marking: ring-groove number, letter R (like R93 to R105), size, and manufacturer / supplier logo
Maximum size of large diameter steel flanges
- Standard for large dia: ASME B16.47
- NPS 26 -NPS 60
for larger sizes pls contact listed flanges suppliers in UAE
Types of high pressure flanges
- Weld Neck Flanges (WN) : up to 2,500lbs
- Slip-On Flanges (SO): up to 2,500lbs
- Blind Flanges (BL): up to 2,500lbs
- Threaded Flanges (TH): up to 2,500lbs
- Socket Weld Flanges (SW): up to 2,500lbs
- Lap Joint Flanges (LJ): up to 2,500lbs
- Raised Face (RF) and Flat Face (FF) flanges: up to 2,500lbs
Compare the temperature of steel flanges mostly installed in industrial sectors such as oil & gas, petrolium, refinery, petrochemical plants and others
| Grade | Steel flange temperature range |
|---|---|
| ASTM A182 F304 | up to 870°C (1,600°F) |
| A182 Gr.F304L | up to 425°C |
| ASTM A182 F316 | up to 870°C (1,600°F) |
| ASTM A182 F11 F5 /F9/ F22 | -29°C (-20°F) to 593°C (1,100°F) |
| Inconel Flanges | up to 1,090°C (2,000°F) |
| Hastelloy Flanges | up to 1,095°C (2,003°F) |
| Titanium Flanges | up to 540°C (1,000°F) |
| ASTM A105 flange / A515 Gr.70/ A350 LF2 / A216 Gr.WCB | up to 425°C |
| A350 LF6 Cl 1 | up to 260°C. |
| A537 Cl.1 | up to 370°C |
Flange face accordance to 6.1.4.1 and 6.1.4.2
| Class | Flange face |
|---|---|
| 75, 150, 300 | 2 mm (0.06 in.) raised face |
| 400, 600, 900 | 7 mm (0.25 in.) raised face |
| OD raised face | ±2 mm (±0.08 in.) |
| Raised face flanges- 2 mm (0.06 inch) | ±0.5 mm (±0.02 in.) |
| Raised face flanges- 7 mm (0.25 in.) | ±2 mm (±0.08 in.) |
| Thickness (mm/ inch) | Tolerances (in inch) | Tolerances (in mm) |
|---|---|---|
| tf ≤ 25 mm (1.0 in.) | +0.12 “., -0.00 “ | +3.0 mm, -0.0 mm |
| 25 mm (1.0 in.) < tf ≤ 50 mm (2.0 in.) | +0.19 “, -0.00 “ | +5.0 mm, -0.0 mm |
| 50 mm (2.0 in.) < tf ≤ 75 mm (3.0 in.) | +0.31 “, -0.00 “ | +8.0 mm, -0.0 mm |
| tf > 75 mm (3.0 in.) | +0.38 “, -0.00 “ | +10.0 mm, -0.0 mm |
Steel flanges supporting material
- Metallic Gaskets as per ASME B16.20
- Ring-Joint
- Spiral-Wound
- Jacketed
- Nonmetallic Flat Gaskets as per ASME B16.21
- High Temp Gasket Material for above 500 °C (PTFE)
- Zinc
- Aluminum alloy
- Magnesium
- Galvanized steel
What is the purpose of a flange in refinery & petrochemical industry?
A flange is used to efficiently connect pipes, tubes, valves, pumps, and other equipment in the refinery and petrochemical industry. Industrial Pipe Flanges can handle different pressure equipment. Their easy maintenance and installation process gives them an edge in this industry. Find steel flanges suppliers in UAE who make use of the best material and are available in different dimensions.
What is RF in flange?
An RF flange is a common flange type in the industry and is easy to identify. The flanges have a raised surface that is raised above the bolting circle where a gasket is placed. These Steel Flanges can make use of a wide combination of gasket designs. They ensure strong sealing and can handle higher pressure media in the system.
Looking for flange stockist in Dubai? Get the quotes from verified Flat Face & Raised Face flanges manufacturers in UAE
Raised Face Flange vs Flat Face Flange
A flange can be produced either in a raised or flat face specification. A Raised Face Flange has a raised face above the bolting area that allows it to securely seal with a gasket. They ensure a strong sealing and thereby increase the pressure containment capability of the joint.
A Flat Face Flange has a gasket surface that is similar to the face of the bolting circle. These flanges don’t have the same strength as RF flanges and are preferred for lower pressure applications.
Check Flange Types, dimensions, class and Flange Joint pressure rating chart as per ASTM/ ASME/ EN/ DIN/ JIS standards
What is the advantage of flange joint?
A flange joint is utilized to easily assemble piping equipment in tight spaces. The Flange Joint has excellent flexibility and can be easily maintained without requiring the dismantling of the entire pipe. They securely seal the equipment allowing for rigorous hydraulic movement to take place in the system.
Is RF and RTJ flanges can join together?
No, because RTJ flanges comes with grooved surface so even you can not use flat gasket to join RF and RTJ
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