Polyurethane Coating Di K9 Pipe External Zinc Bitument Coating Long Life Time

Polyurethane Coating Di K9 Pipe External Zinc Bitument Coating Long Life Time

PU Ductile Iron Pipe Overview:

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.

PU Ductile Iron Pipe is ductile iron pipe with a polyurethane coating, polyurethane coating is made of bi-component polyurethane materials to a scale, and not only does it serve as the inner-lining material of nodular castiron pipe, but as related outer errosion resistant coating. Polyurethane coating has many advantages such as wonderful abrasive resistance, excellent corrosion resistance, non-permeation, smmoth surface, small resistance coeffecient, few volatile organic compound,remarkable environmental protection property, ect. Some polyurethane coatings with a thickness of 900μm,are mainly applied to transportingcorrosive mediums or the mediums with high sanitary condition, including soft water, desalination seawater, municipal wastewater, industrial wastewater, and others; and some with thickness above 700μm are mainly applied to the soil environment with strong corrosivity such as the soil polluted by industrial wastewater or with low specific resistance.

Specifications:

1) DN 80 - 2,600 mm

2) High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time

3) Checked by automatic inspection equipment

4) 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

Process & 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 thickness, appearance)

f) Zinc spraying (Thickness testing)

g) Lining and coating (100% visual check, thickness testing randomly)

i) Marking and packing (100% visual check)

K9 Thickness Ductile Iron Pipe Specification:

Packing: bundled with steel belts or in bulk

Shipment: in bulk or container

Usage:

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.

Our advantages:

There are lots of qualified managers and technicians, and a well-trained team of after-sales service, which provides all services of manufacture, package, transportation and installation. We are looking forward to cooperating with friends from abroad and home creating a brighter future.