A premier manufacturer and global exporter of high-quality Flanges, Pipe Fittings, and Forged Fittings. Delivering precision-engineered solutions in Stainless, Carbon, and Alloy Steel to over 60 countries.
The safe, efficient solution for piping systems where welding is hazardous or impossible.
SOTCO Threaded Flanges (also known as Screwed Flanges) feature a tapered internal thread that matches the external thread of the pipe. This allows for assembly without welding, making them perfect for explosive environments or areas where post-weld heat treatment is not feasible. While primarily used for low-pressure applications, they can be seal-welded for added security.
Key Benefit: Rapid installation and dismantling without specialized welding equipment, ideal for utility services like air and water.
| Nominal Size (NPS) |
Flange Dimensions (in) | Drilling (in) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | T | T1 | T2 | H | ID | R | RF | BC | Holes | Dia (B) | |
| 1/2" | 3.50 | 0.62 | 0.44 | 0.62 | 1.19 | 0.84 | 1.38 | 0.06 | 2.38 | 4 | 0.62 |
| 3/4" | 3.88 | 0.62 | 0.50 | 0.62 | 1.50 | 1.05 | 1.69 | 0.06 | 2.75 | 4 | 0.62 |
| 1" | 4.25 | 0.69 | 0.56 | 0.69 | 1.94 | 1.32 | 2.00 | 0.06 | 3.12 | 4 | 0.62 |
| 1 1/4" | 4.62 | 0.81 | 0.62 | 0.81 | 2.31 | 1.66 | 2.50 | 0.06 | 3.50 | 4 | 0.62 |
| 1 1/2" | 5.00 | 0.88 | 0.69 | 0.88 | 2.56 | 1.90 | 2.88 | 0.06 | 3.88 | 4 | 0.62 |
| 2" | 6.00 | 1.00 | 0.75 | 1.00 | 3.06 | 2.38 | 3.62 | 0.06 | 4.75 | 4 | 0.75 |
| 2 1/2" | 7.00 | 1.12 | 0.88 | 1.12 | 3.56 | 2.88 | 4.12 | 0.06 | 5.50 | 4 | 0.75 |
| 3" | 7.50 | 1.19 | 0.94 | 1.19 | 4.25 | 3.50 | 5.00 | 0.06 | 6.00 | 4 | 0.75 |
| 4" | 9.00 | 1.31 | 0.94 | 1.31 | 5.31 | 4.50 | 6.19 | 0.06 | 7.50 | 8 | 0.75 |
|
|
Design Standards | ANSI B16.5, ANSI B16.47, MSS SP44, API-605, AWWA |
|
|
Size Range | Standard: 1/2″ - 24″ Custom: Up to 48" |
|
|
Pressure Ratings |
ASME: Class 150, 300, 600, 900, 1500, 2500 DIN/PN: PN6, PN10, PN16, PN25, PN40, PN64 |
|
|
Thread Types | NPT (National Pipe Thread) - Standard, BSP / BSPT (On Request) |
|
|
Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
|
|
Connection Type | Screwed onto pipe (No Welding Required) |
ASTM A105 / A105N
ASTM A350 LF2
ASTM A694 F42 - F70
ASTM A182 F304/L
ASTM A182 F316/L
ASTM A182 F321, F347
ASTM A182 F11, F22
ASTM A182 F5, F9
ASTM A182 F91
Duplex / Super Duplex
Inconel, Monel
Hastelloy C276
Eliminates welding, making it perfect for explosive or flammable environments.
Screw-on design allows for fast assembly and disassembly during maintenance.
CNC machined threads ensure a leak-proof seal and smooth engagement.