Flanges
Flanges are used to connect pipes with each other, to valves, to fittings, and to specialty items such as strainers and pressure vessels. A cover plate can be connected to create a "blind flange".
Flanges are joined by bolting, and sealing is often completed with the use of gaskets or other methods.
Flanges are used to connect pipes with each other, to valves, to fittings, and to specialty items such as strainers and pressure vessels.
WELD NECK FLANGES
A welding neck flange (also called a 'weld neck flange') is well recognised for its long-tapered hub, which provides mechanical strength (useful to resist 'dishing' and 'bowing'). Welding neck flanges are high integrity flanges and are available in all sizes, all common face types (flat, raised, RTJ), and all classes.
| Size | 0-1 inch, 1-5 inch, 5-10 inch, 10-20 inch, 20-30 inch, >30 inch |
| Material | Stainless Steel |
| Finishing | Bright,Polish |
| Material Grade | Stainless Steel |
| Material Standard | ASTM A182 |
| Condition | New |
THREADED FLANGES
A threaded flange is a device that connects a device that you can secure to a pipe length without the need for welding. With tapered thread, the threaded flange can be tightened onto the pipe without any leakage.
| Standard | ASTM A105, ASTM A182 |
| Material | Carbon Steel, Stainless Steel, Alloy Steel |
| Size Range | 1/2'', 1'', 2'', 3'', 4'' to 24' |
| Pressure Class | Class 150 to 2500 |
| Face | Raised face (RF), Ring type joint (RTJ) |
| ISO Certified | Yes |
SOCKET WELD FLANGES
Socket Weld Flanges: SW flangeshave a recessed shoulder on the inner diameter which allows the pipe to be fitted correctly. These fittings are typically used for small diameter pipes and can work at higher pressures, offering excellent flow characteristics.
| Standard | Carbon steel ASTM A105, ASTM A350 LF1/2, ASTM A181 Alloy steel ASTM A182 F5, F9, F11, F22, F91 Stainless steel ASTM A182 F304/L, F316/L |
| Outer Diameters | 1/2 inch to 24 inch, up to 2500# |
| Special made | 24'' to 60'', up to 900# |
| Wall Thickness | Schedule 40 to 160 |
| Pressure Ratings | Class 150 to Class 2500 |
| Face Type | RF, RTJ |
| ISO Certified | Yes |
SLIP ON FLANGES
Slip on flange, also called SO flange. It's a kind of flange slides over the pipe with internal design is slightly larger than the pipe. Since the inner diameter of the flange is slightly larger than the outer diameter of the pipe, the SO flange can be directly connected to equipment or pipe by fillet weld at the top and bottom of the flange. It is used to insert the pipe into the inner hole of the flange.
| Standard | ASTM A105, ASTM A182 |
| Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Size | 1/2'' to 24'', customized up to 60'' |
| Pressure Ratings | Class 150 to Class 2500 |
| Face Type | RF, RTJ |
| Common outer diameters | 1/2'', 2'', 3'', 4'', 6'', 8'', 10'', 12'', to 24”. |
| Class range | Class 150, Class 300, 400, 600, 900, 1500, 2500(# or LB). PN 2.5 to PN 250. |
LAP JOINT FLANGES
Lap joint flange (simplified as LTF flange) shape is similar to slip on flange, it has a curved radius at the bore, which can connect with a stub end fittings and slide over the pipe. In this form, the pipe is usually welded to this stub end so the lap joint flange can rotate freely around the stub end.
| Material | Carbon steel: ASTM A105, A350 LF2 Stainless steel: A182 F304/F304L/F316/F316L/F321 Alloy steel: ASTM A182, GR F1, F11, F22, F5, F9, F91 |
| Dimensions | Common Outer Diameters: 1/2'' to 24'' Wall Thickness Schedule: SCH 10, SCH 40, SCH 160 |
| Standards | ASTM A105, ASTM A350 LF2, ASTM A182 F11, F22, F304, F316 |
| Testing Standard | ISO 5208 |
| ISO Certified | Yes |
| Ends | Flanged End |
BLIND FLANGES
Blind flange is like a flange cover, also called blind disk or flanged pipe plug. Blind flange has no holes in the center, for to seal the pipe opening. So it's function is the same as the pipe plug or the pipe cap. The difference is blind flange is a detachable equipment, easy to replace or do maintenance.
| Material | Carbon, Alloy and Stainless Steel |
| Standards | ASTM A105, ASTM A182. |
| Sizes | 1/2'' to 24'', Customized up to 48'' |
| Thickness | Schedule 10(S) to SCH 160 |
| Pressure Ratings | Class 150 to 2500 |
| Face Type | RF, RTJ |
| Dimensions | General use OD range: 1/2'', 2'', 3'', 4'', 6'', 8'', 10'',
12'', to 24”. Special made OD: Up to 60”. Class range: Class 150, Class 300, 400, 600, 900, 1500, 2500 Flange face type: RF (Raised Face), RTJ (Ring Type Joint) |