Menu
Menu
Since 1982, the cast iron socketless pipe system has completely replaced the socket drainage pipe. A tried-and-tested pipe material, easy to handle fittings and reliable couplings provide for a space-saving, fail-safe and durable pipe system, that fully meets the high demands of today’s living standards and state of-the-art technical building requirements. At the same time it fulfills many critical safety requirements such as sound insulation and fireproofing.
Due to the high level of quality of SML systems, these cast iron pipes are used for the most important sections of pipe systems in a building’s drainage system (downpipes, collecting pipes and rainwater drainpipes).
Not sensitive to heat and cold
Sturdy and dimensionally stable
Sound Protection
100% recyclable
Easy-to-assemble
No waste of resources
Fire Protection
High durability
Optimum corrosion protection
High abrasion resistance
Time-saving
Pipe internal coating
Long-term experience, well-educated staff and investments in modern production equipment enables us to produce cast-iron drainage systems for every requirement.
From the design with modern software to the finished product, we cover all steps in the production process, such as pattern building, core making shop, laboratory, automatic moulding machine, centrifugal line, coating technology.
Nominal width | External diameter | External diameter | Wall thickness | Wall thickness | Insertion length | Pipe weight | Pipe weight | Surface |
|---|---|---|---|---|---|---|---|---|
DN | DE | Permitted deviation | e | Pipes and fittings
permitted deviation | (sealing zone) 1 | empty approx. kg/m | Full approx. kg/m | approx. m2 per m |
50 | 58 | +2 / -1 | 3,5 | -0,5 | 30 | 4,3 | 6,4 | 0,18 |
70 | 78 | +2 / -1 | 3,5 | -0,5 | 35 | 5,9 | 9,9 | 0,25 |
75-S | 75 | +2 / -1 | 3,5 | -0,5 | 35 | 5,7 | 10,1 | 0,25 |
80 | 83 | +2 / -1 | 3,5 | -0,5 | 35 | 6,3 | 10,6 | 0,26 |
100 | 110 | +2 / -1 | 3,5 | -0,5 | 40 | 8,5 | 16,7 | 0,35 |
125 | 135 | +2 / -2 | 4,0 | -0,5 | 45 | 11,9 | 24,5 | 0,42 |
150 | 160 | +2 / -2 | 4,0 | -0,5 | 50 | 14,2 | 32,2 | 0,50 |
200 | 210 | +2,5 / -2,5 | 5,0 | -1,0 | 60 | 23,3 | 54,5 | 0,65 |
250 | 274 | +2,5 / -2,5 | 5,5 | -1,0 | 70 | 33,5 | 87,6 | 0,85 |
300 | 326 | +2,5 / -2,5 | 6,0 | -1,0 | 80 | 43,6 | 120,6 | 1,02 |
Density Tensile strength Compressive strength Shear strength | Crushing strength Modulus of elasticity Poisson’s ratio Coefficient of thermal conductivity Heat resistance | Coefficient of linear expansion Chemical resistance |
* Annex F.2 of EN-877 confirms:
“Cast-iron products in accordance with this European Standard are non flammable and not combustible. In case of fire they retain their functional characteristics and remain fire proof for a few hours, that is to say during this period their walls are impervious to flames and gases, they remain free from bursts and distortions, and they are failsafe. Wall and ceiling openings remain intact.”
Density | Tensile strength | Compressive strength | Shear strength | Crushing strength |
|---|---|---|---|---|
approx. 7,2 kg/dm3 (71,5 kN/m3) | > 150 MPa for fittings
> 200 MPa for pipes | approx. 3 to 4 times the value for tensile strength | approx. 1,1 to 1,6 times the value for tensile strength | (peak compressive strength) > 350 MPa |
Cast iron is a fail-safe and durable material, dimensionally stable and sturdy.
Sound insulation is one of the main advantages of FP PREIS® SML. Due to the high density of cast iron and the buffering effect of the rubber lining in the couplings, sound transmission is reduced to a minimum so that the system is able to ensure silent drainage. This provides the basis for general well-being in both, homes and offices, which is required by law and laid down in DIN 4109.
The tests demonstrated that the cast iron drainage system with rapid couplings emits a very low level of noise as a freestanding syste. The crucial point in sound insulation lies in the pipe clamps for wall and ceiling installation, which is to say in the connections of the pipe system to the wall and / or ceiling.
If a vibration-decoupling element is used, the sound level can be reduced even more significantly until a sound level is reached that is not longer audible to the human ear.
The bottom row in the table below shows the sound level, if the downpipe is not attached to the wall – that is to say, it is installed independently. This test was carried out to isolate the airborne sound from the structure-borne sound.
The test focused on simulating common, real-life situations to show that those figures can be reproduced in a laboratory environment and in everyday installation on site.
Flow of water[litres per second]
Sound level on the ground floor (behind the wall- “GF rear”) in [db(A)]
0,5 | 1,0 | 2,0 | 4,0 | |
|---|---|---|---|---|
Pipe clamp without rubber lining | ||||
 | 21 | 26 | 31
| 36 |
Pipe clamp without rubber lining | ||||
 | 16 | 20 | 25 | 30 |
Pipe clamp without rubber lining | ||||
 | <10 | <10 | 12 | 15 |
If you need any further assistance with sound-insulation-planning, please contact our sales support.
It is important to stress that this is genuine recycling, not down cycling where products can be reused but have inferior properties compared to their original usage.
PREIS® SML pipes, fittings and coupling systems are produced and inspected according to EN 877.
The SML pipes are cut to the required length directly by personnel working with the material. Pipes and fittings are joined with suitable pipe clamps.
Horizontal pipes have to be adequately fastened at all turns and branches. Downpipes have to be fastened at a maximum spacing of 2 m. In buildings with 5 floors or more, the downpipes of DN 100 or larger should be secured against sinking by means of a downpipe support. Additionally, for higher buildings, a downpipe support should be fitted at every subsequent fifth storey.
Drainage pipes are planned as unpressurised gravity flow lines. However, this does not exclude the pipe being under pressure if certain operating conditions occur. As drainage and ventilation pipes are subject to possible interactions between the pipes and their environment, they have to be permanently leak-tight against internal and external pressure of between 0 and 0,5 bars. To sustain this pressure, those pipe parts subject to longitudinal movement must be fitted along the longitudinal axis, properly supported and secured. This kind of fitting has to be used whenever interior pressure exceeding 0.5 bars arises in the drainage pipes, such as in the following cases:
Non-friction-fitted pipelines subject to possible internal pressure or pressure developing during operation. These pipes must be provided with a suitable fixture, above all along the turns, to prevent the axes from slipping apart and separating. The required resistance of the pipe and fitting connections to longitudinal forces is achieved by installing additional clamps (internal pressure load up to 10 bars possible) at the joints.
Further information on technical issues can be found in our brochure for technical specifications and details.
Genuine recycling, not down cycling!
A mixture of used car parts, construction waste and foundry return is the basis of our products. We recycle all scrap iron and production waste whenever possible. It is important to stress that this type of recycling does not affect the quality of our products, but lowers both energy consumption and CO2 emission of our foundries.
According to Annex H of EN 877 ( SBI – Single burning item Test) our PREIS® SML – drainage system in cast-iron was approved by the Austrian Research Institute for Chemistry and Technology (ofi) under the fire behaviour conferring conformity with the Construction Products Directive 89/106 EEC and confirmed the classification of A2 according to EN 13501.
In this test, a single pipeline (PREIS® SML pipes, fittings and Rapid-couplings) is mounted and a fire is simulated. The system is burned at about 700 °C for 20 minutes.
Results:
The excellent properties in structural fire protection were confirmed.
The following standards and regulations are relevant to PREIS® SML products:
SML pipes and fittings are supplied with a high quality, reddish brown epoxy resin coating
The paint for fittings is applied as a dip coating with fully cross-linked epoxy resin coatings on the inside and outside of the piece, then to be heat-treated at 180°C for 45 minutes. This causes a compound to be built between the fitting and the coating which is of extra high strength, thus, providing the pieces with thermal and chemical resistance that goes far beyond the stringent requirements of EN 877 and RAL-GZ 698.
On the outside, SML pipes are coated with a reddish brown 40 µ-thick base coat g in accordance with DIN EN 877 that can be repainted with any standard colour varnish or finish commercially available. On the inside, the coating is sprayed with completely cross-linked ochre-coloured epoxy material (120 µ), thus protecting the pipe from aggressive domestic effluents.
Outside painting reddish brown corrosion protection 40u
Grey cast iron with lamellar graphite according to EN 1561
Inside painting epoxy coating 120u
For domestic facilities and discontinuous use
Resistance | to 23° C | to 50° C | to 80° C |
|---|---|---|---|
pH >1 | |||
pH1 (except for organic acids) | |||
pH2 (except for organic acids) | |||
Lime-scale dissolving agents | |||
Cleaning agents | |||
Detergents | |||
Disinfectants | |||
Stain remover | |||
Oxidants | |||
Water, salts | |||
Drain cleaner | |||
Solvents | |||
pH12 | |||
pH13 |
The quality of the inside coating is decisive for the durability of the drainage system. Increasingly aggressive domestic sewage water places high demands on the inside coating.
FP PREIS® SML pipes and fittings cover a wide range of use in the evacuation of water from buildings.
Quick assembly with plug-in couplings.
This quality label from GEG is a guarantee for cast iron drainage systems you can continue to trust in the future. For quality assurance reasons, the “German Institute for Quality Assurance and Certification“ (RAL), Sankt Augustin, took the lead and founded the Gütegemeinschaft Entwässerungstechnik Guss e.V. (GEG – German Association for Drainage Technology Castings). Its main objective is to guarantee excellent product quality also for the future – documented by the quality label (RAL-GZ 698).
There are some suppliers who do not comply with the required quality objectives that have always been a relevant criterion for cast iron drainage pipes. The quality label takes into account the need for safety of all our partners, such as distributors, craftsmen, planning firms, or authorities. The quality label is awarded upon successful completion of an extensive initial test by independent, recognized test institutes. In addition, the test institutes conduct ad hoc external inspections at least twice a year to assure the quality of the products meets the stringent quality requirements.
These measures guarantee consistently high quality and spell out the great responsibility of manufacturers towards their partners in the market, for example distributors, fitters and end customers.
Requirements as of –> | EN 877 | GEG |
|---|---|---|
salt spraying | 350 hours | 1,500 hours |
Resistance to waste water* | 30 days at 23 °C | 30 days at 50 °C |
Chemical resistance | within a range of
pH 2 to pH 12,
30 days at 23°C | enhanced tests with
aggressive substances such
as phosporic acid (pH 1) |
* For the typical composition of waste water see EN 877
