DI Flange Pipes as per IS: 8329 with Screwed on Flanges and Welded Flanges
truform manufactures DI Flange pipe
utilising Flanging technologies of
A) Screwing
B) Welding
With truform's experties and experience in screwing technology. the
DI Flanges are tightened/screwed fit on either side of the spun pipes by machines.
welded Flange Pipes are manufactured by welding DI Flanges on either side of
DI spun Pipes
The technology is generally used following Indian standards as below:-
| Size Range(DN) | Flanging Technology |
| 80-450mm | Both Screwing/welding technology |
| 500-1000mm | Welding technology |
DI Flange Pipe Range:-
Size : 80 mm to 1000 mm
Length : Available in mix and std. Lengths up to 6m.
Pressure Ranges : PN 10.
Class of Pipes : K9.
The Pipes are generally supplied with inside Cement Mortar Lining (OPC) and outside Zinc coating followed by Bitumin coat
DI Flange Pipe Application :-
- Vertical Pipe Lines: for overhead Tanks / Elevated Service Reservoirs (ESR'S)
- Disengagement Requirements:
- Application where pipelines are disengaged / dismantled for cleaning like in treatment plants for water, Effluent, Sewage and pump houses.
- Temporary installations, applications where pipelines are transferred from one location to other, require Flange Pipes like temporary pipelines required for De-Watering mines or heavily inundated areas
- Over Ground and & Exposed Installation: Flanged Pipes are most suitable for over ground pipelines like portions of Pipelines on Pillars / Pedestals for Rivers / Canal or Road crossing and bridges.
- Fire Fitting Systems
- For Laying in Hilly Areas / Slopes, even exceeding the Angles of Response.
Standard Flange Drilling PN-10:-
| Size DN (mm) |
Pitch Circle Diameter (mm) |
Bolt size | No of Bolts |
Bolt Length (mm) |
| 80 | 160 | M16 | 4 | 65 |
| 100 | 180 | M16 | 8 | 65 |
| 150 | 240 | M20 | 8 | 70 |
| 200 | 295 | M20 | 8 | 70 |
| 250 | 350 | M20 | 12 | 80 |
| 300 | 400 | M20 | 12 | 80 |
| 350 | 460 | M20 | 16 | 80 |
| 400 | 515 | M24 | 16 | 85 |
| 450 | 565 | M24 | 20 | 85 |
| 500 | 620 | M24 | 20 | 90 |
| 600 | 725 | M27 | 20 | 100 |
| 700 | 840 | M27 | 24 | 110 |
| 750 | 900 | M27 | 24 | 110 |
| 800 | 950 | M30 | 24 | 110 |
| 900 | 1050 | M30 | 28 | 120 |
| 1000 | 1160 | M33 | 28 | 130 |
DI Flange Pipe Mechinical Properties IS : 8329 :-
| Size (DN)(mm) | Tensile Strength (Min) | Elongation at break (Min) | Hardness (Max) |
| Pipe 80-1000mm | 420 MPa | 10% | 230HB |
| Flange | 420 MPa | 5% | 250HB |
DI Flange Pipe Hydrostatic test pressure at works (MPa) :-
| Size (DN)(mm) | PN10 | PN16 | PN25 | PN40 |
| 80-300 | 1.6 | 2.5 | 3.2 | 4.0 |
| 350-600 | 1.6 | 2.5 | 3.2 | 4.0 |
| 700-1000 | 1.6 | 2.5 | 3.2 | - |
