Special Coating Double Flanged Ductile Iron Pipe Weld Type DN80 -
2000mm
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:
- Systems design requirements
Sewer systems constructed with ductile iron components in
conformity with this standard shall be leak tight at the pressures
given in Table 5, depending on the way they are normally operated.
This applies under all normal service conditions, including
foreseeable external loads and joint movements (angular, radial and
axial).
Table 5 — Pressure
Type of operation | Internal pressure bar | External pressure bar |
| Continuous | Occasional | Continuous |
| Gravity | 0 to 0,5 | 2 | 1 |
| Positive pressure | See PFA in Annex A | see PMA in Annex A | 1 |
| Negative pressure | - 0,5 | - 0,8 | 1 |
Leak tightness of pipeline components
Pipes, fittings, inspection chambers and manholes shall be leak
tight when used under the conditions for which they are designed .
When tested in accordance with 6.5, pipes and fittings for positive
pressure applications shall exhibit no visible leakage, sweating or
any other sign of failure.When tested in accordance with 6.6, pipes
and fittings for negative pressure applications shall exhibit no
visible leakage, sweating or any other sign of failure.Pipes,
fittings, inspection chambers and manholes for gravity applications
shall comply with the performance requirements of 5.4.
Table 6 — DN groupings for performance tests
| Performance tests | DN groupings |
| Longitudinal bending of pipes (see 5.2) | DN 80 to DN 200 | – | – | – |
| Diametral stiffness of pipes (see 5.3) |
DN 80 to DN 250 |
DN 300 to DN 600 |
DN 700 to DN 1000 |
DN 1100 to DN 2000 |
| Leak tightness for gravity pipelines (see 5.4) |
| Joint tightness to positive internal pressure (see 5.5.2) |
| Joint tightness to negative internal pressure (see 5.5.2) |
| Joint tightness to positive external pressure (see 5.5.2) |
| Joint tightness to cyclic internal hydraulic pressure (see 5.5.2) |
| Chemical resistance to effluents (see 5.8) |
DN 80 to DN 2000 |
| Abrasion resistance (see 5.9) |
| Strength of the cement mortar lining (see 5.10) |
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.
