PRODUCT SPECIFICATIONS
STANDARDS
SMS Centrifugally Cast Ductile Iron Pipes are
in complience with the following
standards:
- Ductile Iron Pipes
| ISO 2531:1998 |
|
Ductile iron pipes, fittings, accessories
and their joints |
| EN 545:2002 |
|
Ductile iron pipes, fittings, accessories and
their joints for water pipelines |
| EN 598:1994 |
|
Ductile iron pipes, fittings, accessories and
their joints for sewerage application |
|
- Coatings and Linings
| ISO 8179-1:1995 |
|
Ductile iron pipes - External zinc
coating - Part 1: Metallic zinc with finishing layer |
| ISO 4179:1985 |
|
Ductile iron pipes for pressure and non-pressure
pipelines - Centrifugal cement mortar lining |
| ISO 8180:1985 |
|
Ductile iron pipes - Polyethylene sleeving |
|
MATERIAL CHARACTERISTICS
| Minimum tensile strength (MPa) |
|
420 MPa |
| Minimum elongation percent after fracture |
|
10 for DN 80 to 1000 |
| |
7 for DN 1100 to 1600 |
| Maximum hardness |
|
230 HB |
|
WALL THICKNESS
| The nominal iron wall thickness ‘‘e’’
of the pipes is given by, |
| e= K(0,5 + 0,001DN) |
|
Where DN is the nominal diameter,
and
K is a coefficient represents the thickness class
of the pipe. |
| Standard SMS centrifugally cast ductile
iron pipes are of thickness class K=9. For other
class of thickness please consult us. |
|
TOLERANCES ON DIMENSIONS
The tolerances on nominal wall thickness of
centrifugally cast pipes are as follows:
| For |
|
Tolerance |
There is no limit for
upper limit (+ tolerance) in order to be in the
safe side considering internal pressure resistance.
|
| e=6 |
-1,3 |
| e>6 |
-(1,3+0,001DN) |
|
| Tolerances on lengths are as follows:
|
| |
|
|
| Push-on type pipes |
|
±30 mm |
| Flanged pipes |
|
±10 mm |
|
|
|
| |
|
|
| Pipe straightness shall have a maximum deviation
of 0,125 of the length of the pipe. |
COATING AND LINING
|
|
All pipes are coated
by metallic zinc with a bituminous finishing layer.
Besides metallic zinc coating with
a bituminous layer provides all the protective needs
for most of the type of soils;
for severely corrosive soils polyethylene sleeving can
be supplied. |
| |
|
|
All pipes are internally
lined with centrifugally applied cement mortar lining.
|
|
