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. Other lengths are available by agreement between the manufacturer and the purchaser.

Specifications:

1. Thickness of paint coatings

The dry film thickness of paint coatings shall be measured by one of the three following methods:

• directly on the casting by means of suitable gauges, e.g. magnetic, or by using a ‘wet film’ thickness gauge where a correlation between wet film thickness and dry film thickness can be demonstrated, or
• indirectly on a token which is attached to the casting before coating and is used after coating to measure the dry film thickness by mechanical means, e.g. micrometer, or by a weight method similar to 6.7, or
• indirectly on a test plate made of steel or of ductile iron, which is coated by the same process as the castings to be controlled.

For each casting to be controlled, at least three measurements shall be taken (either on the casting or on the token or on a test plate). The mean thickness is the average of all the measurements taken and the local minimum thickness is the lowest value of all the measurements taken. The manufacturer shall record the method used in his documented FPC procedures.

2. Thickness of cement mortar lining

During manufacture, the thickness shall be measured on the freshly applied lining by a spear having a diameter of 1,5 mm or less and controlled on the finished hardened lining by means of a suitable gauge, e.g. magnetic.

For pipes, the measurements shall be taken approximately 200 mm from the end face. The manufacturer’s process control system shall specify the frequency of this test.