Ductile Iron Double Flanged Pipes
Screwed or welded flanges on K9 ductile iron pipes, made to IS:8329 and ready to install on site.
Overview
- DN 80–1000 mm
- 0.15–6.0 m
- Class K9
- PN10 / PN16
- IS:8329
Our ductile iron double flanged pipes are made from centrifugally cast K9 ductile iron pipes conforming to IS:8329. Flanges are fitted by screwing or welding, and faces are machined for a true, leak-proof joint.
Each pipe is cement-mortar lined inside and zinc + bitumen coated outside for long service life, and is tested in our in-house laboratory before dispatch. Lengths can be cut to suit your layout, from 0.15 m up to 6.0 m.
We also manufacture single flange pipes and puddle flange pipes, fully customised to your requirement.
Specifications
| Nominal size | DN 80 – 1000 mm |
|---|---|
| Length | 0.15 m – 6.0 m (cut to your requirement) |
| Pipe class | K9 |
| Pressure rating | PN10 & PN16 |
| Flanging | Screwed (threaded) or Welded |
| Internal lining | Cement mortar lining |
| External coating | Metallic zinc + black bitumen |
| Reference standard | IS:8329 |
| Testing | Complete in-house testing facility |
Technical Data
| Component | Tensile strength (min) | Elongation (min) | Hardness (max) |
|---|---|---|---|
| Pipe | 420 MPa | 10% | 230 HB |
| Flange | 420 MPa | 5% | 250 HB |
| Size range | PN10 | PN16 |
|---|---|---|
| DN 80 – 1000 | 1.6 MPa (16 bar) | 2.5 MPa (25 bar) |
Values shown are the minimum requirements of the referenced Indian Standard. Test certificates and third-party inspection reports are available on request.
Key Features
Screwed or welded flanges
Choose the flanging method that suits your size and pressure needs.
Machined flange faces
Faces and drilling are machined for accurate, leak-proof bolting.
Lined & coated
Cement mortar inside; zinc and bitumen outside to resist corrosion.
Pressure tested
Every pipe is hydrostatically tested at works before dispatch.
Applications
- Overhead tanks & ESR risers
- Pump houses & valve chambers
- Water & sewage treatment plants
- Exposed & overground crossings
- Firefighting systems
- Power & chemical plants
Cross Section of the Pipe
- Cement mortar liningSmooth inner lining that protects the pipe and keeps water clean.
- Ductile iron pipeK9 centrifugally cast DI pipe to IS:8329: strong yet flexible.
- Zinc coatingMetallic zinc layer that protects the outer surface from corrosion.
- Black bitumen coatingFinal protective finish over the zinc coat.
Also Manufactured
Along with double flanged pipes, we manufacture the following, fully customised as per the customer's requirement. Size, length, flange drilling and puddle position are all made to your drawing.
Single Flange Pipes
Flange at one end and plain (spigot) at the other, for connecting flanged equipment to socketed or welded lines.
Puddle Flange Pipes
Pipes with a puddle flange cast or welded on, to seal pipe passages through concrete walls of tanks, sumps and reservoirs.
Need DI Double Flanged Pipes?
Call or WhatsApp us with your size and quantity for a quick quotation.