Flanged ductile iron pipe with a range of DN80 to DN 2600.belongs to Ductile iron pipeline systems, including pipes, fittings, accessories and joints, consist of various materials.When used for conveying water intended for human consumption, the materials in contact with the water shall meet the relevant requirements of the national standards or regulations in the country of use with respect to effect on water quality.The lengths of flanged pipes shall be as given in Table 5. Other lengths are available by agreement between the manufacturer and the purchaser.

Samples shall be taken, at the manufacturer’s discretion, either from an integrally cast sample, from a sample attached to the casting, or from a sample cast separately. In the latter case, it shall be cast from the same metal as that used for the casting. If the casting is subjected to heat treatment, the sample shall be subjected to the same heat treatment. The tensile testing machine shall have suitable holders or grips to attach to the test bar ends so as to positively apply the test load axially. The testing machine shall have a force range suitable for testing the bars to failure whilst indicating the load applied. The rate of stressing shall be as constant as possible within the limits of 6 N/mm2 per second to 30 N/mm2 per second. The tensile strength shall be calculated by dividing the maximum force sustained by the test bar by the cross-
sectional area of the test bar before testing. The elongation shall be measured by piecing together the broken parts of the test bar and taking the ratio of the extended gauge length to the original gauge length. Alternatively, the elongation may be measured directly by means of an extensometer.

Standardized lengths of flanged pipe