C21 Carbon Steel Flange
C21 Blind Flange Chemical Composition And CS Grade C21 Weld Neck Flanges Material Specification.
C21 Flange
C21 Carbon Steel Flange
CS C21 Flange Material
Table Of Contents
- What Is C21 Flange?
- C21 Carbon Steel Flange Heat Treatment?
- What Is High Carbon Steel C21 Flange?
- What Is Medium Carbon Steel C21 Flange?
- C21 Flange Material Specifications
- C21 Flange Chemical Composition
- C21 Flange Mechanical Properties
- ASTM C21 Flange Thickness Calculation
- ASTM C21 Carbon Steel Flange Weight Chart Table
- Standard Dimensions Of C21 Flange Material
- Specialise In Distributing Types Of C21 Flange
What Is C21 Flange?
Since the Carbon Steel C21 Flange has been coated by a thicker layer of zinc on its surface, these flanges are known to be corrosion resistant. In fact, the Galvanised C21 Flange is much more corrosion resistant as opposed to a flange which has been surface plated with zinc, because the coating of zinc on the surface of C21 Flange achieved through galvanization is much more thicker, thereby proving to be more resistant.
C21 Carbon Steel Flange Heat Treatment?
While this Low Carbon C21 Blind Flange is low in terms of strength, and cost; the alloy exhibits other properties such as High ductility, toughness, good machinability as well as good weldability. Typically, Low content Carbon Steel Grade C21 Forged Flange is soft and the alloy cannot be hardened by heat treatment. Hence, hardening this low carbon containing Fully Killed Carbon Steel BLRF C21 Flange can usually be achieved by cold work.
What Is High Carbon Steel C21 Flange?
On heating, High Carbon Steel C21 Flange becomes extremely hard and brittle. Further, high carbon alloy based ASTM C21 Slip On Flange, is very difficult to cut, bend and weld. Steel High Carbon C21 Lap Join Flange is also referred to as carbon tool steel, by several of our clients.
What Is Medium Carbon Steel C21 Flange?
Medium Carbon Steel C21 Flange tend to be much stronger as well as more difficult to form, weld and cut in comparison to low carbon grade flanges. Although medium grade carbon steel flanges are stronger than their low carbon containing counterparts, the properties of the former such as ductility and toughness are often compromised. Medium grade C21 Carbon Steel Pipe Flanges can quite often be hardened followed by which they can be tempered using heat treatment.
Carbon Steel C21 Flange Mechanical Properties And We Are Famed As The Most Trusted C21 Blind Flange Manufacturer In India.
C21 Flange Material Specifications
| Material Specification Of : | C21 Carbon Steel Flange |
|---|---|
| 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 |
C21 Flange Chemical Composition
| Element / Component | Composition % |
| Carbon ( C ) | 0.18 - 0.23 |
| Manganese ( Mn ) | 0.80 - 1.35 |
| Phosphorus ( P ) | 0.035 max |
| Sulphur ( S ) | 0.030 max |
| Silicon ( Si ) | 0.15 - 0.35 |
| Aluminium ( Al ) | - |
| Chromium ( Cr ) | 0.30 max |
| Copper ( Cu) | 0.40 max |
| Nickel ( Ni ) | 0.40 max |
| Titanium ( Ti) | - |
| Vanadium ( V ) | 0.030 max |
| Molybdenum ( Mo ) | 0.12 max |
| Niobium ( Nb ) | 0.020 max |
| Nitrogen ( N ) | - |
C21 Flange Mechanical Properties
| Items | Value |
| Yield Strength ReH N/mm2 | 250 minimum |
| Tensile Strength Rm N/mm2 | 485 - 630 |
| Elongation ( A ) | 20% minimum |
| Reduction ( Z ) | 45% minimum |
| Impact Test ( J ) | 31 minimum |
Check ASTM C21 Slip On Flange Thickness Calculation For Pressure Vessel And ASTM A105 C21 F22 Carbon Steel Flange Pressure Rating Chart.
ASTM C21 Flange Thickness Calculation
| C21 Flange Wall Thickness | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPS (Normal Pipe Sizes) | Outside Daimeter (O.D.) | Schedule 10 | Schedule 20 | Schedule 30 | STD Wall | Schedule 40 | Schedule 60 | EXT Hvy | Schedule 80 | Schedule 100 | Schedule 120 | Schedule 140 | Schedule 160 | XX Hvy |
| ½ | 0.84 | 0.083 | ... | ... | 0.109 | 0.109 | ... | 0.147 | 0.147 | ... | ... | ... | 0.188 | 0.294 |
| ¾ | 1.05 | 0.083 | ... | ... | 0.113 | 0.113 | ... | 0.154 | 0.154 | ... | ... | ... | 0.219 | 0.308 |
| 1 | 1.315 | 0.109 | ... | ... | 0.133 | 0.133 | ... | 0.179 | 0.179 | ... | ... | ... | 0.25 | 0.358 |
| 1 ¼ | 1.66 | 0.109 | ... | ... | 0.14 | 0.14 | ... | 0.191 | 0.191 | ... | ... | ... | 0.25 | 0.382 |
| 1 ½ | 1.9 | 0.109 | ... | ... | 0.145 | 0.145 | ... | 0.2 | 0.2 | ... | ... | ... | 0.281 | 0.4 |
| 2 | 2.375 | 0.109 | ... | ... | 0.154 | 0.154 | ... | 0.218 | 0.218 | ... | ... | ... | 0.344 | 0.436 |
| 2 ½ | 2.875 | 0.12 | ... | ... | 0.203 | 0.203 | ... | 0.276 | 0.276 | ... | ... | ... | 0.375 | 0.552 |
| 3 | 3.5 | 0.12 | ... | ... | 0.216 | 0.216 | ... | 0.3 | 0.3 | ... | ... | ... | 0.438 | 0.6 |
| 3 ½ | 4 | 0.12 | ... | ... | 0.226 | 0.226 | ... | 0.318 | 0.318 | ... | ... | ... | ... | 0.636 |
| 4 | 4.5 | 0.12 | ... | ... | 0.237 | 0.237 | ... | 0.337 | 0.337 | ... | 0.438 | ... | 0.531 | 0.674 |
| 5 | 5.563 | 0.134 | ... | ... | 0.258 | 0.258 | ... | 0.375 | 0.375 | ... | 0.5 | ... | 0.625 | 0.75 |
| 6 | 6.625 | 0.134 | ... | ... | 0.28 | 0.28 | ... | 0.432 | 0.432 | ... | 0.562 | ... | 0.719 | 0.864 |
| 8 | 8.625 | 0.148 | 0.25 | 0.277 | 0.322 | 0.322 | 0.406 | 0.5 | 0.5 | 0.594 | 0.719 | 0.812 | 0.906 | 0.875 |
| 10 | 10.75 | 0.165 | 0.25 | 0.307 | 0.365 | 0.365 | 0.5 | 0.5 | 0.594 | 0.719 | 0.844 | 1 | 1.125 | 1 |
| 12 | 12.75 | 0.18 | 0.25 | 0.33 | 0.375 | 0.406 | 0.562 | 0.5 | 0.688 | 0.844 | 1 | 1.125 | 1.312 | 1 |
| 14 | 14 | 0.25 | 0.312 | 0.375 | 0.375 | 0.438 | 0.594 | 0.5 | 0.75 | 0.938 | 1.094 | 1.25 | 1.406 | ... |
| 16 | 16 | 0.25 | 0.312 | 0.375 | 0.375 | 0.5 | 0.656 | 0.5 | 0.844 | 1.031 | 1.219 | 1.438 | 1.594 | ... |
| 18 | 18 | 0.25 | 0.312 | 0.438 | 0.375 | 0.562 | 0.75 | 0.5 | 0.938 | 1.156 | 1.375 | 1.562 | 1.781 | ... |
| 20 | 20 | 0.25 | 0.375 | 0.5 | 0.375 | 0.594 | 0.812 | 0.5 | 1.031 | 1.281 | 1.5 | 1.75 | 1.969 | ... |
| 22 | 22 | 0.25 | ... | ... | 0.375 | ... | ... | 0.5 | ... | ... | .... | .... | .... | .... |
| 24 | 24 | 0.25 | 0.375 | 0.562 | 0.375 | 0.688 | 0.969 | 0.5 | 1.219 | 1.531 | 1.812 | 2.062 | 2.344 | .... |
| 26 | 26 | .... | .... | .... | 0.375 | .... | .... | 0.5 | .... | .... | .... | .... | .... | .... |
| 30 | 30 | 0.312 | 0.5 | 0.625 | 0.375 | .... | .... | 0.5 | .... | .... | .... | .... | .... | .... |
| 36 | 36 | 0.312 | 0.5 | 0.625 | 0.375 | 0.75 | .... | 0.5 | .... | .... | .... | .... | .... | .... |
| 40 | 40 | .... | .... | .... | 0.375 | .... | .... | 0.5 | .... | .... | .... | .... | .... | .... |
| 42 | 42 | …….. | …….. | …….. | 0.375 | …….. | …….. | 0.5 | …….. | …….. | …….. | …….. | …….. | …….. |
| 48 | 48 | …….. | …….. | …….. | 0.375 | …….. | …….. | 0.5 | …….. | …….. | …….. | …….. | …….. | …….. |
ASTM C21 Carbon Steel Flange Weight Chart Table
| Nominal Pipe Sizes (NPS) | Slip On (SORF) | Threaded (NPT) | Socket Weld (SWRF) | Lap Joint (Loose) | Blind (BLRF) | Weld Neck (WRNR) |
|---|---|---|---|---|---|---|
| ½ | 1 | 1 | 2 | 1 | 2 | 2 |
| ¾ | 2 | 2 | 2 | 2 | 2 | 2 |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 |
| 1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
| 1½ | 3 | 3 | 3 | 3 | 4 | 4 |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 |
| 2½ | 8 | 8 | 8 | 8 | 7 | 10 |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
| 3½ | 11 | 12 | 11 | 11 | 13 | 12 |
| 4 | 13 | 13 | 13 | 13 | 17 | 16.5 |
| 5 | 15 | 15 | 15 | 15 | 20 | 21 |
| 6 | 19 | 19 | 19 | 19 | 27 | 26 |
| 8 | 30 | 30 | 30 | 30 | 47 | 42 |
| 10 | 43 | 43 | 43 | 43 | 70 | 54 |
| 12 | 64 | 64 | 64 | 64 | 123 | 88 |
| 14 | 90 | 90 | 90 | 105 | 140 | 114 |
| 16 | 106 | 98 | 98 | 140 | 180 | 140 |
| 18 | 130 | 130 | 130 | 160 | 220 | 165 |
| 20 | 165 | 165 | 165 | 195 | 285 | 197 |
| 22 | 185 | 185 | 185 | 245 | 355 | 225 |
| 24 | 220 | 220 | 220 | 275 | 430 | 268 |
Standard Dimensions Of C21 Flange Material
| NPS | O.D. of Flange | Flanges Thickness | Diameter of RF | Diameter of Hub at Base | Lengtd Tdru Hub | Bore or Diameter | Dia. of Hub at Bevel | Radius of Fillet | Deptd of Socket | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Welding (WN) Neck | Slip-On (SORF) Threaded (NPT) Socket (SWRF) | Lap Joint (Loose) | Slip-on (SORF) Socket (SWRF) | Lap Joint (Loose) | ||||||||
| O | Q | R | X | Y | Y | Y | W | B | H | r | Z | |
| 1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | .88 | .90 | .84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
| 1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
| 1-1/4 | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
| 1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
| 2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
| 2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
| 3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 | 3.57 | 3.60 | 3.50 | 3/8 | 13/16 |
| 3-1/2 | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 | 4.07 | 4.10 | 4.00 | 3/8 | 7/8 |
| 4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 1-5/16 | 4.57 | 4.60 | 4.50 | 7/16 | 15/16 |
| 5 | 10 | 15/16 | 7.5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 | 5.66 | 5.69 | 5.56 | 7/16 | 15/16 |
| 6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 | 6.72 | 6.75 | 6.63 | 1/2 | 1-1/16 |
| 8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 | 8.72 | 8.75 | 8.63 | 1/2 | 1-1/4 |
| 10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 | 10.88 | 10.92 | 10.75 | 1/2 | 1-5/16 |
| 12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 | 12.88 | 12.92 | 12.75 | 1/2 | 1-9/16 |
| 14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 | 14.14 | 14.18 | 14.00 | 1/2 | 1-5/8 |
| 16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 | 16.16 | 16.19 | 16.00 | 1/2 | 1-3/4 |
| 18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 | 18.18 | 18.20 | 18.00 | 1/2 | 1-15/16 |
| 20 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 | 20.20 | 20.25 | 20.00 | 1/2 | 2-1/8 |
| 24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
Specialise In Distributing Types Of C21 Flange
Carbon Steel C21 Slip On Flanges
Cs C21 Socket Weld Flanges
Steel Low Carbon C21 Blind Flanges
Carbon Steel Grade C21 Spectacle Flanges
Plain Carbon Steel C21 Flanges
Low Steel C21 Plate Flanges
Medium Carbon C21 Reducing Flanges
Black Carbon Steel C21 Orifice Flanges
Fully Killed Carbon Puddle C21 Flanges
Galvanised Carbon Steel C21 Rtj Flanges
Countries We Have Supplied Recently :
| C21 Carbon Steel Flange | Philippines, UK, Australia, Nigeria |
| C21 Flange | Oman, UAE, Hong Kong, Malaysia |
| CS Grade C21 Material | Chile, Singapore, Iran, Italy |
| Galvanised Carbon Steel C21 Rtj Flanges | United Arab Emirates (UAE), Norway, Turkey, Malaysia |
| Fully Killed Carbon Puddle C21 Flanges | Netherlands, Russia, Malaysia, Dubai |
| Black Carbon Steel C21 Orifice Flanges | United Kingdom -UK, Malaysia, Europe, UAE |
| Medium Carbon C21 Reducing Flanges | Dammam -KSA, Belgium, Philippines, Indonesia. |
| Low Steel C21 Plate Flanges | Qatar, Thailand, Europe, France. |
| Plain Carbon Steel C21 Flanges | Malaysia, Thailand, Germany, Czechia |
| Carbon Steel Grade C21 Spectacle Flanges | Finland, Bangladesh, Malaysia, USA |
| Steel Low Carbon C21 Blind Flanges | Saudi Arabia (KSA), Kuwait, South Africa, Brazil |
| Carbon Steel C21 Slip On Flanges | South Africa, Bahrain, Singapore, Singapore |