K9 Class Weld Flanged Ductile Iron Pipe Structure Round For Water
Supply
Flanged Ductile Iron Pipe:
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:
- Thickness and surface condition
The nominal thickness of the cement mortar lining and its tolerance
shall be as given in Table 4. When measured in accordance with 6.9,
the lining thickness shall be within the specified tolerance.
The surface of the cement mortar lining shall be uniform and
smooth. Trowel marks, protrusion of sand grains and surface texture
inherent to the method of manufacture are acceptable. However,
there shall be no recesses or local defects which reduce the
thickness to below the minimum value given in Table 4. The grinding
of the lining in order to remove the top surface of the internal
layer is permitted provided the finished lining complies with all
requirements .
Fine crazing and hairline cracks associated with cement rich
surfaces may appear in dry linings. Shrinkage cracks inherent to
cement-bound materials may also develop in the dry linings. After
curing of the lining and under normal storage conditions, the crack
width and the radial displacement (disbondment) shall not exceed
the values given in Table 4.
Table 4 — Thickness of cement mortar lining
DN | Thickness | Maximum crack width and radial displacement |
| Nominal value | Limit deviation a |
| 80 to 300 | 4 | - 1,5 | 0,4 |
| 350 to 600 | 5 | - 2,0 | 0,5 |
| 700 to 1200 | 6 | - 2,5 | 0,6 |
| 1400 to 2000 | 9 | - 3,0 | 0,8 |
| a The lower limit only is given. |
Cement mortar linings at pipe ends may have a chamfer of maximum
length 20 mm.
2. Coating of the joint areas
The coating shall uniformly cover the whole surface; it shall have
a smooth regular appearance and be free from defects which may
affect its function.The minimum coating thickness shall be such
that the coating complies with 5.8. When measured according to 6.8,
the coating thickness shall be not less than the minimum thickness
given in the quality plan of the manufacturer.
Packing: in wooden box or pallet, or in bulk
Shipment: in bulk or container
Usage:
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. When used under the conditions
for which they are designed, in permanent or in temporary contact
with water intended for human consumption, ductile iron pipes,
fittings and their joints shall not have detrimental effects on the
properties of that water for its intended use.
Our advantages:
There are lots of qualified managers and technicians, and a
well-trained team of after-sales service, which provides all
services of manufacture, package, transportation and installation.
We are looking forward to cooperating with friends from abroad and
home creating a brighter future.
