ductile iron pipes: 1) The standard of pipe: ISO 2531- 1998, EN 545- 2002, K92) Effective length: 6M when using bulk shipment way, or about 5. 5M or 5. 7M when in 20'container shipment way3) Inner cement line: Portland cement line as per ISO41794) Zinc coating: at least 130gsm as per ISO 81795) Bitumen painting: at least 70um as per ISO81796) Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber tightness ring as per ISO 46337) DN80- 1600 mm 8) High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time9) Checked by automatic inspection equiment10) Composition: a) C: 3. 4- 3. 7% b) Si: 2. 1- 2. 4% c) P: <0. 08% d) S: <0. 015Pull strength: >420MPaYield: > 10% Hardness : <230HB
