C25 ductile iron pipe refers to the pipe that is cast by high-speed centrifugal casting of centrifugal ductile iron machine after adding nodularizing agent from casting molten iron of No. 18 or above.

Centrifugal casting nodular cast iron pipe is a pipe made of nodular cast iron by centrifugal spinning process. The pipeline cantransport fluid media such as water, oil and gas, and is widely used in various pipeline projects such as metallurgy, mining,water conservancy, petroleum, urban public services and so on. Ductile iron pipe has the advantages of high strength , good toughness, better than steel and good corrosion resistance. It is an ideal substitute for gray cast iron pipe and ordinary steel pipe. In addition, the produced Di pipe has good flatness, uniform wall thickness, high dimensional accuracy, good surface finish, excellent mechanical properties and firm adhesion of internal and external coatings.Flexible quick connectors and rubber gaskets are used to facilitate pipe installation. By combining the amazing ductility, high tensile strength and good corrosion resistance of nodular cast iron, this easy to operate pipe can be easily tapped, drilled or welded. Nodular cast iron pipe is famous for its practical performance, which provides unparalleled advantages for the application of water, sewage and natural gas mains! 

Products strictly meet the below standards:
ISO 2531 Ductile iron pipes, fittings and accessories for pressure pipelines.
BSEN545 Ductile iron pipes, fittings and accessories and their joints for water pipelines. Requirements and test methods.
BSEN598 Ductile iron pipes, fittings, accessories and their joints for sewage application-requirements and test methods.
ISO7186 Ductile iron pipes, fittings, accessories and their joints for the construction of drains and sewers outside buildings.
ISO4179 Ductile iron pipes for pressure and non pressure pipelines-Centrifugal cement mortar lining-general requirements.
ISO8179 Ductile iron pipes-External zinc coating.
ISO4633 Rubber Seals – joint rings for water supply, drainage and sewerage pipelines-specs for materials.
ISO 8180 Ductile iron pipes – Polyethylene Sleeve

Specifications: 
1) The standard of pipe: ISO 2531, EN545 , EN598. 
2) Pipe class: K9, C40, C30, C25, etc.
3) Pipe joint: push-on joint(Tyton joint), K type joint, self-restrained joint
4) Effective length: in general, the pipe length is 6m for bulk shipment and 5.7m for container shipment.
5) Internal lining: cement mortar lining as per ISO4179 
6) Zinc coating: at least 130g/m2 as per ISO 8179 
7) Bitumen painting: at least 70um as per ISO 8179 
8) Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber ring as per ISO4633 
9) DN 80 - 2,600 mm 
10) High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time 
11) Checked by automatic inspection equipment
12) Chemical composition: (%)
 3. a) C: 3.5 - 4.0 
 4. b) Si: 1.9 - 2.6
 5. c) Mn:0.15 - 0.45
 6. c) P: <0.06
 7. d) S: <0.02
13) Mechanical properties
 1. a) Tensile strength: ≥420MPa 
 2. b) Yield strength: ≥300Mpa 
 3. c) Hardness: ≤230HB 
 4. d) Elongation%: DN80 - 1000 ≥10 DN1200 - 2200 ≥7

14) Process and testing: 
 1. a) Induction furnace and treated metal (Chemical analysis of raw material, spheroidizing & Nodularity) 
 2. b) Casting (Visual check and weight check)
 3. c) Heat treatment (Micro structure) 
 4. d) Hydrostatic test (Pressure test) 
 5. e) Dimensional checks (Checking pipe length and joint, OD, wall thickness, appearance) 
 6. f) Zinc spraying (Thickness testing) 
 7. g) Lining and coating (100% visual check, thickness testing randomly) 
 8. i) Marking and packing (100% visual check)

15) The pipe coating can be customized, such as, zinc-aluminum alloy, PU, etc.
Packing: bundled with steel belts or in bulk
Shipment: in bulk or container