Diameters, Circumferences and Areas for Thickness Class Ductile Iron Standard Cement-Lined Pipe
| Nominal Size Inches | Outside Diameter Inches | Inside Diameter Inches |
|---|
| 16 | 17.40 | 16.53 |
| 18 | 19.50 | 18.61 |
| 20 | 21.60 | 20.69 |
| 24 | 25.80 | 24.85 |
The maximum nominal laying lengths are 18.5' or 21' for sizes 4" – 24", 19' for sizes 30" – 36", and 22' for 42" – 48". The centrifugally cast Ductile Iron USIFLEX Pipe in sizes 4"–48" meets the applicable requirements of ANSI/AWWA C151/A21. 51 Standard for Ductile-Iron Pipe, Centrifugally Cast for Water.
Cement-mortar lining for ductile iron pipe and fittings for water service is in accordance with ANSI/AWWA C104/A21. In fact, most pipe furnished is cement lined, providing improved flow characteristics and the required protection against tuberculation. The cement lining is satisfactory for temperatures up to 212° F.
ANSI/AWWA C150/A21.50 ANSI/AWWA C151/A21. 51
| Size (in.) | Outside Diameter (in.) | Special Thickness Classes – Wall Thickness (in.)1 |
|---|
| 54 |
|---|
| 12 | 13.20 | 0.43 |
| 14 | 15.30 | 0.45 |
| 16 | 17.40 | 0.46 |
Piping class or Pipe Class is a document that specifies the type of the components such as a type of pipe, schedule, material, flange ratings, branch types, valve types and valve trim material, gasket and all the other components specific requirements to be used for different fluids under different operating conditions
Service Cast Iron
| Size (in) | Inside Diameter of Hub (in) | Outside Diameter of Barrel (in) |
|---|
| 4 | 4.94 | 4.30 |
| 5 | 5.94 | 5.30 |
| 6 | 6.94 | 6.30 |
| 8 | 9.25 | 8.38 |
Ductile Iron can be welded successfully to produce welds that have mechanical properties comparable to those of the base iron. As with any base material, the success of welding Ductile Iron depends on suitable equipment, correct procedures, qualified welders, and effective quality control procedures.
Ductile Iron pipes are pipes made of ductile iron. They are commonly used for potable water distribution and the pumping of slurries, sewage and process chemicals.
Ductile iron pipe is lighter, stronger, and more durable than cast iron. The difference between cast iron and ductile iron is the graphite form. In ductile iron, the graphite form is spheroidal, or nodular; in cast iron, it is in a flake form.
Ductile Iron vs Steel. Note: Ductile iron with its carbon content of 3.0%-3.9% has a higher carbon content than cast steel which normally has a carbon content of 0.08%-0.60%. Tensile Strength. While there is no large difference when it comes to tensile strength, ductile iron has the greater yield strength (40 ksi).
Ductile Iron Pipe has an outside diameter that is typically larger than steel pipe in the 48-inch size. This accounts for a small difference in wall thickness. Second, and more importantly, steel pipe design allows wall stress to build to 75 percent of yield (safety factor of 1.33) if surges occur.
Ductile Iron is a type of cast iron known for its impact and fatigue resistance, elongation, and wear resistance due to the spherical (round) graphite structures in the metal. Ductile Iron is also called ductile cast iron, spheroidal graphite cast iron, or nodular cast iron.
PVC is an acronym that stands for polyvinyl chloride. Of the different types of plastic pipe used for water supply, PVC has a wide variety of plumbing uses, from drainage pipe to water mains. It is most commonly used for irrigation piping, home, and building supply piping.
1.1 This code covers the methods of laying cen- trifugally cast (spun) ductile iron pressure pipes of diameters 80 mm and above, laid either above ground or below ground for water supply and drainage.
K7 and K9 is different pressure class of D.I pipes, the 7 and 9 represents internal pressure withstanding capacity of D.I pipes, Mainly 7 and 9 are respective MPa/cm^2. K9 pipes are heavier than K7 pipes for same dis.
Ductile Iron is a type of cast iron known for its impact and fatigue resistance, elongation, and wear resistance due to the spherical (round) graphite structures in the metal. Ductile Iron is also called ductile cast iron, spheroidal graphite cast iron, or nodular cast iron.
MJ stands for Mechanical Joint. It is a type of compression joint designed for underground connection for pipe, valves and fittings. The spigot end of a pipe receives the gland and gasket and is then inserted into the MJ bell of the connecting pipe, valve or fitting.
DN = Diameter Nominal
The term Diameter Nominal refers to the internal diameter of a pipe. Together with the nominal pressure rating and the materials class, all dimensions of a piping line, e. g. flange dimensions, are defined by indicating the nominal diameter.Again, Ductile Iron Pipe is lead-free. Modern Ductile Iron Pipe doesn't suffer from internal corrosion. For almost 100 years, since the 1920s, iron pipe has been manufactured with a cement-mortar lining that prevents corrosion, and, no, that lining does not contaminate water.
Pipe Weight Calculation Formula
This formula can be used to determine the weight per foot for any size of pipe with any wall thickness: Wt/Ft = 10.69*(OD - Wall Thickness)*Wall Thickness.Ductile iron maintains the traditional qualities of cast irons, resulting from the high carbon content:
- compression strength,
- castability,
- abrasion resistance,
- machinability,
- fatigue strength.
Specifically, what makes grey iron “grey iron,” is the graphite flake structure that is created during the cooling process from the carbon that is in the component. In a grey iron casting, you can see little black flakes of graphite. These flakes cause fractures and cause the material to have a grey appearance.
What are black steel pipes? Black steel pipes are made of steel that has not been coated with a substrate such as zinc or paint. Since it has a dark color surface that is forms by iron oxide during the manufacturing process, it is called black steel pipe.
Steel Pipe. They are produced by two distinct methods which result in either a welded or seamless pipe. In both methods, raw steel is first cast into a more workable starting form. It is then made into a pipe by stretching the steel out into a seamless tube or forcing the edges together and sealing them with a weld.
