Overview of Ductile Iron Pipe

Ductile cast iron, also called ductile iron, spheroidal graphite iron, or nodular cast iron, is a type of cast iron invented in 1943. While most varieties of cast iron are brittle, ductile cast iron is much more flexible and elastic, due to its nodular graphite inclusions.

Graphite particles exist in the form of sphericity in ductile cast iron. Sizes graphite particle are restricted to 6 -7 class and spheroidizing rate should not be less than 80%. Thus after the spheroidizing process, ductile iron will be endowed with mechanical properties of both cast iron and steel.

Much of the production of ductile iron is in the form of ductile cast iron pipe, used for water supply and sewerage design. 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.

General introduction of Self-restrained Joint Ductile Iron Pipe

•Material : Ductile Cast Iron

•Size Range : DN 80mm to DN 1200mm

•Unit Effective Length : 6m or 5.7m or negotiable

•Manufacture Standard: ISO 2531:1998/ EN 545:2006/EN 598:2007

•Annual capacity : 300,000 tons

•Coating Exterior: Zinc 130g/m2 according to ISO 8179-1 and bitumen coating 70 microns.

•Cement Interior: Portland Cement/ High Alumina Cement/ Sulphate Resisting Cement Lining according to ISO 4179

•Special requirements on external coating and internal lining can be applied

•We also provide accessories such as SBR/EPDM rubber gaskets, lubricant paste, pipe caps, PE sleeves, etc.

Mechanical Properties

Standard Lining and Coating

External Protection

Metallic zinc complying with the standard ISO8179,and bitumen,or special protective coating according to the customer’s requirement.

Notes:

.            Pipes and fittings conform to the requirements of International Standard ISO 2531,British Eurpean Standard BS

.            EN545,and their extensions. If information given in English and Chinese differs,the English version prevails.

.            Dimensions and masses of pipes and fittings are approximate and are for refererces only;accurate dimensions and

.            masses should be confirmed with us at the time of placing order. Flanged joint pipes and fittings are generally

.            available with PN10,PN16 and PN25. Socketed joint pipes and fittings generally available with T type and K type joints.

Features of Self-restrained Joint Ductile Iron Pipe:

.            Ductile Iron Pipe offers proven reliability and the quality.

.            It is quick and easy installation.

.            The ductile iron pipe has high pressure capability.

Application:

Used for water and sewer lines.

Production Process

Much of the production of ductile iron is in the form of ductile cast iron pipe, used for water supply and sewerage design. Ductile 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.

Specification of Self-restrained Joint Ductile Iron Pipe:

Standard wall thickness of Self-restrained Joint Ductile Iron Pipe

Self-restrained Joint

Self-restrained Type is a push-in self anchored joint. The principle of joint anchoring consists in transmitting the axial forces from one pipeline to the following one, thus ensuring that the joint does not come apart.

The application of self-restrained joints is of particular interest where congested conditions preclude concrete anchor block constructions or in poorly cohesive soils.Self-restrained joints combine the advantages of flexible joint pipes and welded joint pipes.

 Photo of Self-restrained Joint Ductile Iron Pipe