K9 PU Ductile Iron Pipe diameter from DN 80 mm to 2600mm

 K9 PU Ductile Iron Pipe Zinc Or FBE External DN 80 Mm - 2600mm 

overview:

Polyurethane coating is made of bi-component polyurethane materials to a scale, and not noly does it serve as the inner-lining material of nodular cast iron pipe, but as related outer erosion resistant coating. Polyurethane coating has many advantages such as wonderful avrasive resistance, excellent corrosion resistance, non-permeation, smooth surface, small resistance coefficient, few volatile organic compound, remarkable environmental protection property, etc. Some polyurethane coatings with a thickness above 900μm are mainly applied to transporting corrosive 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:

polyurethane coating:

factory applied coating which consists of polyurethane on the outside of the pipe barrel and external socket.

specific coating resistance: 

surface related electric resistance of the coating perpendicular to the pipe wall.

performance test: 

test which is done once and is repeated according to a schedule or after a relevant change of coating material and/or coating supplier or change in process application.

routine test:

test carried out to control the manufacturing process with a frequency defined by the manufacturer.

Surface preparation:

Prior to application of the polyurethane coating, the surface of the pipes shall be technically clean, free of rust, loose constituent materials, dirt, oil, grease and moisture.

In cold weather, or anytime when moisture tends to condense on the surface of the pipe, the pipe shall be uniformly warmed for a sufficient time to dry the pipe prior to cleaning. The pipe temperature shall be maintained at at least 5 °C above the dew point.

The surface shall be prepared by grit blasting and be in compliance with level Sa 2.5 of EN ISO 8501-1. The surface roughness Ra, in accordance with EN ISO 8503-1, shall be at least 10 micrometers which is equivalent to an anchored profile, Rz of 50 micrometers or higher if required by the coating material provider or manufacturer.

Appearance and continuity:

The polyurethane coating shall be:

• uniform in colour, except the spigot and the socket which may be of a different colour for permitted marking;

• uniform appearance and smoothness except for admissible repairs;

• free of visible defects (pinholes, bubbles, blisters, wrinkles, cracks or voids).

Slight superficial variations of colour or brilliance, due to repairs or prolonged exposure to sunlight or contact with other pipes are permissible.

Chemical resistance:

The chemical resistance is determined by the change in weight of the polyurethane coating. When tested in accordance to 7.2.1, the weight increase and weight loss shall meet the requirements given in Table 1 when compared to the original weight.

Table 1 — Weight change requirements

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.