ISO 2531 Class K9 Ductile iron pipe with external zinc spaying
& bitumen coating
Ductile iron pipe is a pipe made of ductile cast iron commonly used for potable water
transmission and distribution. This type of pipe is a direct development of earlier cast iron pipe, which it has
Owing to our expertise in this domain, we are engaged in offering
an exclusive array of Ductile Iron Pipes. Extensively used in different industrial units, these pipes are
manufactured under the guidance of vendor’s skilled professionals
using high grade raw materials in compliance with international
standards. In order to ensure quality and durability, these pipes
are stringently tested on various parameters.
Ductile cast iron is kind of alloy of iron, carbon and silicon, in
which graphite exists in the type of spherical, generally the size
of graphite is 6-7 class, and spheriodization grade of the pipe
should be controlled 1-3 class(spheroidization rate is not below
80%). Thus after spheroidization, ductile cast iron possesses the
nature of iron as well as the characteristic of steel. After
annealing, its microstructure contains ferrite and a little
pearlite possessing excellent mechanical properties.
Much of the production of ductile iron is in the form of ductile
cast iron pipe, used for water and sewer lines. Ductile cast iron
pipe is stronger and easier to tap, requires less support and
provides greater flow area compared with pipes made from other
materials like PVC, concrete, polyethylene or steel. Ductile Iron
Pipe is the most widely-used pipeline product in water supply and
water drain/sewage projects.
The Hydraulic test pressure of the ductile iron pipes
|Nominal diameter DN(mm)||Hydraulic test pressure|
|The standard of pipe:||SO 2531, EN545 , EN598.||Pipe class:||K9, C40, C30, C25, etc.|
|Pipe joint:||push-on joint(Tyton joint), K type joint, self-restrained joint||Effective length:||in general, the pipe length is 6m for bulk shipment and 5.7m for
|Internal lining:||cement mortar lining as per ISO4179||Zinc coating:||at least 130g/m2 as per ISO 8179|
|Bitumen painting:||at least 70um as per ISO 8179||Chemical composition (%)|
a) C: 3.5 - 4.0
b) Si: 1.9 - 2.6
c) Mn:0.15 - 0.45
c) P: <0.06
d) S: <0.02
Tensile strength: ≥420MPa
b)Yield strength: ≥300Mpa
c) Hardness: ≤230HB
d) Elongation%: DN80 - 1000 ≥10 DN1200 - 2200 ≥7
|Process and testing:|
a) Induction furnace and treated metal (Chemical analysis of raw
material, spheroidizing & Nodularity)
b) Casting (Visual check and weight check)
c) Heat treatment (Micro structure)
d) Hydrostatic test (Pressure test)
e) Dimensional checks (Checking pipe length and joint, OD, wall
f) Zinc spraying (Thickness testing)
g) Lining and coating (100% visual check, thickness testing
i) Marking and packing (100% visual check)
The pipe coating can be customized, such as, zinc-aluminum alloy,
|Internal Lining||External Coating|
|Internal Lining||Pipes and Fittings||External Coating||Pipes and Fittings|
|Standard Coating||Portland cement or Blast furnace cement mortar||Standard Coating||Metallic zinc + Bituminous paint|
|Reinforced Protections||High alumina cement mortar||Reinforced Protections||Polyethylene sleeve applied|
|Special Coatings||Please consult us||Special Coatings||Polyurethane or polyethylene coating or Ceramic|
Weight of K9 ductile cast iron pipes with T type joint (ISO2531)
|DN(mm)||External Diameter (mm)||Socket Weight (kg)||Unit Weight (kg/m)||Total weight (kg) Length=6000mm||Total weight (kg) length=5700mm|
(1). We will pack your items by carton or plywood cases for
(2). We can also pack your items according to your requirements.
1. Good quality and low price.
2. Good after-sale service.
3. Bring the finest goods to customer is our ultimate goal.
4. Products are exported to various countries.
Q: Is sample order acceptable?
A: Yes,of course.
Q: How to place the order?
A: You can send us email or inquiry.
Q: How many days for delivery?
A: Normally within 15~30 days after receipt of payment.
Q: How to make the payment?
A: We accept T/T, L/C.
Q: How will you make the shipment?
A: By sea, air or express service.