Ductile Iron is an alloy of Iron, Carbon and Silicon, also known as Spheroidal Graphite Iron or Nodular Cast Iron. The process of manufacturing Ductile Iron involves adding magnesium to low-sulfur molten iron. Due to the reaction with magnesium, the excess carbon (graphite) present in the iron forms as multiple small nodules and the resultant product is known as Ductile Iron.Ductile Iron is preferred to Cast Iron because while it retains the corrosion resistance of Cast Iron, it has more than double the tensile strength [Cast Iron- 180 MPa (min), Ductile Iron – 420 MPa (min)]. Cast Iron is brittle because the graphite is present in plate-like flakes. On the contrary, in Ductile Iron, the shape of the graphite becomes a spheroidal nodule, which offers better mechanical properties and makes Ductile Iron sturdy, structurally stronger and shock-proof.. Ductile iron pipes are as per IS:8329/2000 grade k-7 & k-9.
Advantages of Ductile Iron Pipe :
- Tremendous Tensile Strength
- Pressure bearing ability
- Withstands Severe Crushing Loads
- Great beam Strength
- Corrosion resistant
- High Impact Resistance
- High Bursting Strength
- Sustains external static/dynamic loading
- Easy to Install
- Minimal installation cost
- Zero Maintenance
- No Cathodic Protection.
- Low pumping cost
- Excellent hydraulic features.
- Extensive range of pipes, fittings and accessories.
Types :
| Class | Available | Description |
|---|---|---|
| K-7 | Yes | Ductile Iron Class K7 Pipes can deal with less pressure than Ductile Iron Class K9 Pipes. The pressure rating of K7 ductile iron pipes & Ductile Iron Pipe Class K7 varies and this would base on the Nominal Wall Thickness and the Nominal Diameter of the pipe. The weight of would differ as this would be dependent on the size of the pipe. The number ‘7’ in Class K7 implies pressure class of the Ductile Iron Pipe Class K7 and 7 represents the pipe’s internal pressure withstanding capacity. |
| K-9 | Yes | Ductile Iron K9 Pipes are capable of dealing with much more pressure than Ductile Iron Class K9 pipes. The weight of K9 pipes depends on the thickness and the size of the pipe. Class K9 DI pipe specification depends on the Nominal Wall Thickness as well as the Nominal Diameter of the pipe. DI K9 Pipes are heavier than Class K9 Ductile Iron Pipe. |
| K-12 | No | Ductile iron Class K12 pipes are utilized all over the globe today, as such pipe are corrosion resistant and they also provide ductility, toughness, and strength. The wall thickness of Ductile Iron Pipe Class K12 is 7mm. For both Ductile Pipe Class K9 and K12 nominal pressure ratings, pressure rating come into play within the temperature range from -10 C to 80 C. |
These pipes are widely used for conveying raw water & distribution of treated water in majority of rural water areas, where the requirement of water is less. Mostly medium quality Galvanized Iron are used. The Galvanized Iron are cheaper, lighter in weight and easy to handle & transport & easy to join them. Galvanized Iron sizes vary from range 15mm to 150mm. Generally screwed & socketed pipes are used. The Galvanized Iron welded Pipes shall be manufactured from hot rolled steel strip for welded gi pipes conforming to IS 10748 or Cold-rolled low carbon steel sheets and strips conforming to IS 513. The welded galvanized steel are then passed through sizing sections where any dimensional deviation are being corrected. Galvanized Iron are then pressure tested for any leaks. The Galvanized Iron are then cutted into desired lengths by automatic cutting machines. The varnishing and galvanization of pipes are done as per specific requirements. Also Galvanization is a process in which steel or iron is coated with a layer of zinc to protect them from rusting or corrosion.
Galvanized Iron Pipe Size Chart in India:
| Size(inch) | Outside Diameter | Inside Diameter | Wall thickness | Weight per Ft. |
|---|---|---|---|---|
| 3/4 | 1.050 | 0.824 | 0.1130 | 1.13 lb |
| 1 | 1.315 | 1.049 | 0.1330 | 1.678 lb |
| 1 1/4 | 1.660 | 1.380 | 0.1400 | 2.272 lb |
| 1 1/2 | 1.900 | 1.610 | 0.1450 | 2.717 lb |
| 2 | 2.375 | 2.067 | 0.1540 | 3.652 lb |
| 2 1/2 | 2.875 | 2.469 | 0.2030 | 5.793 lb |
| 3 | 3.500 | 3.068 | 0.2160 | 7.575 lb |
| 3 1/2 | 4.000 | 3.548 | 0.2260 | 9.109 lb |
| 4 | 4.500 | 4.026 | 0.2370 | 10.790 lb |
| 6 | 6.625 | 6.065 | 0.2800 | 18.974 lb |
| 8 | 8.625 | 7.981 | 0.3220 | 28.554 lb |
| 10 | 10.750 | 10.020 | 0.3650 | 40.483 lb |
| 11 | 11.750 | 11.000 | 0.3750 | 45.557 lb |
| 12 | 12.750 | 12.000 | 0.3750 | 49.562 lb |
| 12 | 12.750 | 12.000 | 0.406 | 53.530 lb |
Stainless Steel Pipes are utilized in ventures that are requesting in light of the fact that they offer amazing impervious to erosion. These SS Pipe are accessible in various classes, evaluations and types and they are utilized in a wide number of uses, for example, dairy and sustenance preparing, engineered strands, oil and gas handling, refinery and petrochemicals, water treatment offices, and so on.Timetable 40 treated steel pipe measurements are reachable in pipe sizes, for example, 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 6" and 8". Stainless 80 hardened steel pipe has a thicker divider thickness than that of a calendar 40 pipe. The divider thickness of calendar 160 treated steel pipe ranges from 0.188 crawls to 59.54 inches. Calendar 160 treated steel pipe weight rating relies upon the pipe estimate and the temperature. Hardened steel pipe providers are found everywhere throughout the globe. There are numerous treated steel pipe producers in India. On the web, one can without much of a stretch locate the main 10 SS pipe makers in India. SS pipe suppliers in india weight graph can be got from the World Wide Web. SS pipe value list in India is accessible at numerous sites. Welded and consistent created treated steel pipe Standard measurements are portrayed in ASME B36.19 and ASME B36.10. Gronex Trademart offers all Stainless Steel Seamless Pipe for the Oil and Gas and Refinery Industry as Stainless Steel Round Pipe, Stainless Steel Hexagonal Pipe, Stainless Steel Square Pipe, Stainless Steel Hollow Pipe and Stainless Steel ERW Pipe Suppliers. hardened steel Thin Wall Pipe ordinarily discovers application including Marine, Aerospace enterprises, Chemical preparing, Nuclear reactors, Pollution control gear and so on. Orders at Gronex are guaranteed fast delivery of the Stainless Steel Pipes in the country. The main reason being we have an excellent warehousing and storage facilities for goods. The Stainless Steel Pipes are manufactured to sustain very high pressure.
Different grades of Stainless Steel Pipes :
TYPE 304 / 304L
- An austenitic chromium-nickel stainless steel
- General purpose corrosion resistance
- Non-magnetic except when cold worked
TYPE 304H STAINLESS STEEL PIPE
- Higher carbon than Stainless Steel 304 for better high temperature creep properties
- Corrosion resistance same as Type 304
- Used in high temperature over 1000 degrees F
STAINLESS STEEL TYPE 309S
- Superior heat resisting austenitic stainless steel
- Good for continuous exposure to 2000 degrees F
- Slightly better corrosion resistance than Type 304
STAINLESS STEEL TYPE 310S
- Superior heat resisting austenitic stainless steel
- Good for continuous exposure to 2100 degrees F
- General corrosion resistance better than Stainless Steel 304 and 309
STAINLESS STEEL TYPE 316 / 316L
- An austenitic chromium-nickel stainless steel
- Improved corrosion and heat resistance
- Improved corrosion resistance to chlorides
STAINLESS STEEL TYPE 317L
- An austenitic chromium-nickel molybdenum stainless steel
- Improved chloride pitting resistance over Stainless Steel 316 Pipe
- Used in Chemical, petroleum, pulp and paper industries
TYPE 321 / 321H
- An austenitic stainless steel that contains titanium stabilizing elements
- Improved intergranular corrosion resistance
- Excellent for high temperature service in carbide precipitation range
STAINLESS STEEL TYPE 347 / 347H
- An austenitic stainless that contains columbium stabilizing elements
- Improved intergranular corrosion resistance
- Excellent for high temperature service in carbide precipitation range
STAINLESS STEEL TYPE 410
- An martensitic stainless steel with high mechanical properties
- Resist abrasion and wear better than most 300 series stainless steel pipe
- Fair resistance to general corrosion and oxidation
STAINLESS STEEL TYPE 446
- An high chromium ferritic stainless steel
- Excellent high temperature resistance to oxidation and corrosion
- Commonly used in high temperature applications
904L STAINLESS STEEL
- An austenitic stainless steel with low carbon content
- Good resistance to pitting and crevice corrosion
- Resistance to general corrosion in reducing acids
DUPLEX 2205
- Dual-phase, 45% ferritic and 55% austenitic stainless steel
- Good strength, toughness and corrosion resistance
- Resists chloride stress corrosion cracking
254 SMO
- An austenitic stainless steel with a high Molybdenum content
- High resistance to pitting and crevice and general corrosion
- Very high resistance to chloride stress corrosion cracking
AL-6XN STAINLESS STEEL PIPE
- An austenitic stainless steel with a high Molybdenum content
- Exceptional resistance to chloride corrosion
- Highly resistant to saltwater corrosion
Cast iron pipe is a pipe which has had historic use as a pressure pipe for transmission of water, gas and sewage, and as a water drainage pipe during the 19th and 20th centuries. It comprises predominantly a gray cast iron tube and was frequently used uncoated, although later coatings and linings reduced corrosion and improve hydraulics. Cast iron pipe was superseded by ductile iron pipe, which is a direct development, with most existing manufacturing plants transitioning to the new material during the 1970s and 1980s. Little cast iron pipe is currently manufactured.
