пластичный трубы

ductile iron pipes specifications: 1)The standard of pipe: ISO 2531-1998, EN 545-2002,K9 2)Effective length: 6M when using bulk shipment way, or about 5.5M or 5.7M when in 20'container shipment way 3)Inner cement line:Portland cement line as per ISO4179 4)Zinc coating: at least130gsm as per ISO 8179 5)Bitumen painting: at least 70um as per ISO8179 6)Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber tightness ring as per ISO 4633 7)DN80-1600mm 8)High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time 9)Checked by automatic inspection equiment 10)Composition: a)C:3.4-3.7% b)Si:2.1-2.4% c)P:<0.08% d)S:<0.015 Pull strength:>420MPa Yield:> 10% Hardness :<230HB