Centrifugal Cast Ductile Iron Pipe, Shape : Round

we are offering centrifugal cast ductile iron pipe.
specifications:
1) the standard of pipe: iso 2531 - 1998, en545-2002 , 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 least 130gsm as per iso 8179
5) bitumen painting: at least 70um as per iso 8179
6) gaskets are nbr rubber, natural rubber, sbr rubber or epdm rubber
tightness ring as per iso4633
7) dn 80 - 1,600 mm
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 equipment
10) composition:
a) c: 3.4 - 3.7%
b) si: 2.0 - 2.4%
c) p: 10%
13) hardness: