TATA DI pipes Tubing
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TATA DI pipes, DUCTILE IRON PIPES
Since the invention of Ductile Iron, also known as Spheroidal Graphite Iron or Nodular Cast Iron in 1949, it has become the most preferred pipe material for water supply and pressure sewerage applications around the world. Although ductile iron has a chemical composition which is very similar to cast iron, it is considered superior due to its spheroidal micro-structure which has vast advantages such as higher pressure bearing ability, impact resistance, corrosion resistance etc. listed below.
Advantages of Ductile Iron Pipes
The basic chemical composition of ductile iron is similar to that of grey cast iron. However, ductile iron is preferred due to the following reasons –
TATA DI pipes High Tensile Strength
Ductile iron has very high tensile strength due to its spheroidal graphite micro-structure. Therefore, it can handle much higher pressure and stress compared to cast iron. Ductile Iron Pipes ensure better beam strength, greater resistance to impact and traffic load.
TATA DI pipes Corrosion Resistant
Ductile iron has excellent anti-corrosive properties. The table below clearly shows that corrosion is much lesser in case of ductile iron pipes as compared to other pipes.
| Pipe Material | Corroded Volume (gr/ cm2) | |
|---|---|---|
| After 45 days | After 90 days | |
| Ductile Iron Pipe (DI) | 0.0060 | 0.0090 |
| Grey Cast Iron Pipe (CI) | 0.0060 | 0.0103 |
| Seamless Steel Pipe (MS) | 0.0170 | 0.0273 |
| Welded Steel Pipe (MS) | 0.0294 | 0.0396 |
TATA DI pipes Flexible and Leak Resistant
Ductile Iron Pipes have flexible push-on joints which do not leak at high or low pressure, even when deflected. Thus, these pipes are flexible, easy and quick to join.
TATA DI pipes Durable Cement Mortar Lining
Ductile iron pipes are lined with cement mortar using large centrifugal force. The advantages of Cement Mortar Lining (CML) are the following –
- Provides higher Hazen William’s ‘C’ value. CML for ductile iron pipes has a C value of 140 compared to 100 for bare metallic pipes. Higher C value reduces pumping costs
- Increases carrying capacity
- Pipe wall becomes passive by the alkaline reaction of cement
- Prevents pitting and tuberculation of metallic pipes and prevents production of red water
- Smooth inner surface improves flow capability
- Prevents abrasion of pipe wall and increases pipe life
Excellent Workability of TATA DI pipes
Ductile iron pipes are extremely workable – flexible, easy and quick to install. Installation is less expensive and requires no special tool or high skilled workforce.
Manufacturing Process of TATA DI pipes
TMDIPL maintains industry standards in its manufacturing process. The plant at Kharagpur is equipped with state-of-the-art technologies including Magnesium Treatment by converter process. This combination of modern technology and dedicated workforce ensures high process capability and stringent quality control on the products.
Product Range
| Nominal Diameter(mm) | Class | Standard Length(m) |
|---|---|---|
| 80 to 800 ( except 125 and 750 ) |
K7, K9, C25,C30, C40 | 5.5 |
Dimensions of socket and spigot pipes – Thickness Class (Class K7 and K9)
| Nominal Diameter DN(mm) | Nominal Wall Thickness (e) in mm. | |
|---|---|---|
| K7* | K9 | |
|
80
|
5.0
|
6.0
|
|
100
|
5.0
|
6.0
|
|
150
|
5.0
|
6.0
|
|
200
|
5.0
|
6.3
|
|
250
|
5.3
|
6.8
|
|
300
|
5.6
|
7.2
|
|
350
|
6.0
|
7.7
|
|
400
|
6.3
|
8.1
|
|
450
|
6.6
|
8.6
|
|
500
|
7.0
|
9.0
|
|
600
|
7.7
|
9.9
|
|
700
|
9.0
|
10.8
|
|
800
|
10.4
|
11.7
|
| K7*: for low pressure application. | ||
Dimensions of socket and spigot pipes – Pressure Class
| Nominal Diameter DN(mm) | Pressure Class | |
|---|---|---|
| Preferred Class | Nominal Thickness | |
|
80
|
C40
|
4.4
|
|
100
|
C40
|
4.4
|
|
150
|
C40
|
4.5
|
|
200
|
C40
|
4.7
|
|
250
|
C40
|
5.5
|
|
300
|
C40
|
6.2
|
|
350
|
C30
|
6.3
|
|
400
|
C30
|
6.5
|
|
450
|
C30
|
6.9
|
|
500
|
C30
|
7.5
|
|
600
|
C30
|
8.7
|
|
700
|
C25
|
8.8
|
|
800
|
C25
|
9.6
|
Internal Lining: Cement mortar lining as per requirement with ordinary Portland Cement, Sulphate Resisting Cement and Blast Furnace Slag Cement conforming to relevant ISO, IS, BS EN standards.
External Protection: Metallic Zinc (130 gm/m2 or 200 gm/m2 as per the customer’s requirement) complying to relevant ISO, IS, BS EN standards with a finishing layer of Black Bitumen / Epoxy Coating (minimum thickness 70 micron) or any other special coating as per the customer’s requirement.
Ductile iron pipe, a product of advanced metallurgy, offers unique properties for conveying water under pressure, and other piping uses. It combines the physical strength of mild steel with the long life of gray cast iron.
Ductile iron offers the greatest possible margin of safety against service failures due to ground movement and beam stresses. Virtually unbreakable in ordinary service, it also provides increased resistance to breakage caused by rough handling in shipping and installation.
The corrosion resistance of ductile iron pipe has been proved in a wide variety of accelerated tests to be at least the equal of gray cast iron.
