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                                                Water mains
                                                Water mains

                                                Water main pipes

                                                SSAB's welded steel pipes can be used in water mains, where the normal maximum operating pressure is 16 bar. Water main pipe size fittings are delivered for diameters ≥ DN 400.

                                                The long lifespan of steel water main pipe materials is ensured by an external polyethylene coating and an internal concrete or epoxy layer suitable for use with drinking water. The various connection methods can be carried out by welding or with flanges, connectors or sealed sleeve joints.

                                                Our solutions are competitive and technically first rate. We are committed to high delivery capacity and punctuality as well as expert technical customer service

                                                Applications:

                                                • Water main pipes
                                                • Sewage pipes

                                                Joining methods

                                                Pipe joints connect pipes and fittings into an integrated pipeline.

                                                Joints can be divided into two main types: tension resistant and non-tension resistant. Joints may also be divided by application.
                                                Learn more

                                                Joining methods

                                                Pipe joints connect pipes and fittings into an integrated pipeline.

                                                Joints can be divided into two main types: tension resistant and non-tension resistant. Joints may also be divided by application as follows:

                                                Butt joint

                                                Used primarily in tension-resistant pressure lines such as oil, natural gas and district heating pipelines. Used in water pipelines, especially when the diameter is ≥DN 600 and the joint can be repaired from the inside after welding.

                                                OV welded joint

                                                Used in water lines to facilitate installation and to allow 1.5–3.0 degree bends at joints. Since the joint is welded from the inside to make it tension resistant, it is suitable for diameters ≥DN 600 and pressures up to 20 bar.

                                                DIN welded joint with a rubber ring

                                                The DIN joint is made with a rubber ring partially embedded in the concrete (type DIN/G), which eliminates the need to complete the internal concrete lining after welding. Used in pipelines where easy installation of the tension-resistant joint and the possibility of making less than 1.0 degree bends are a must. Welded from the outside. Suits pipe diameters DN 400–1000.

                                                 

                                                Flange joint

                                                Flange joints are widely used in industry. In the case of underground pipes flange joints are used mainly to connect large bends.

                                                Pipe fittings

                                                Internally and externally coated pipe fittings can be easily joined to each other.

                                                Besides standard fittings, SSAB also delivers fittings for water main pipe sizes tailored to customer specifications, considerably improving the modifiability of the system.
                                                Learn more

                                                Pipe fittings

                                                Internally and externally coated pipe fittings can be easily joined to each other.

                                                Besides standard fittings, SSAB also delivers fittings for water main pipe sizes tailored to customer specifications, considerably improving the modifiability of the system.

                                                 

                                                 

                                                Coatings

                                                External and internal coatings ensure the long life of steel water main pipes.

                                                SSAB delivers water main pipe materials with external polyethylene coating and an internal concrete or epoxy layer suitable for use with drinking water. There are also suitable inside coatings for sewage and rainwater.
                                                Learn more

                                                Coatings

                                                External and internal coatings ensure the long life of steel water main pipes.

                                                SSAB delivers water main pipes with external polyethylene coating and an internal concrete or epoxy layer suitable for use with drinking water. There are also suitable inside coatings for sewage and rainwater.

                                                 

                                                External coating

                                                Property Typical values   
                                                Density grade HDPE (High density Polyethene)   
                                                Thickness, mm  > 2,2  DN 400 - 450 
                                                  > 2,5  DN 500 - 750 
                                                  > 3,0  DN 800 - 1200 
                                                  Increased thickness (v) + 0,7   
                                                Bond strenght at +20 ?C, N/cm  > 120   
                                                Impact resistance, J/mm > 5   
                                                Identation at +23 ?C, mm 0,2 >  
                                                Breaking elongation, % > 400   
                                                Specific resistance, Ωm2 > 108   
                                                Thermal ageing, % 35 >  
                                                Light ageing, %  35 >  
                                                Cathodic disbonding, 30 days, mm  5 >  
                                                Ambient temperature, ?C  - 40 ... +80   

                                                 

                                                The 3-layer coating consists of polyethylene, adhesion and epoxy layers.

                                                 

                                                 Internal cement mortal lining

                                                Property Typical values 
                                                 Thickness, mm   8 ± 2 DN 400 - 600
                                                   10± 3 DN 650 - 900
                                                   12± 3 DN 950 - 1200
                                                 Flexural tensile strength, N/mm2  > 5
                                                 Compressive strength, N/mm2  > 50

                                                 

                                                Availability and weights per metre of water mains

                                                Availability and weights per metre of watert mains


                                                Wall thickness [mm] / Weight [kg/m]

                                                6.3
                                                7.1
                                                8
                                                8.8
                                                10
                                                11
                                                12.5
                                                14.2
                                                16
                                                DN400 62.2*
                                                69.9
                                                78.6
                                                86.3
                                                97.8
                                                107
                                                121


                                                DN500 77.9*
                                                87.7
                                                98.6
                                                108
                                                123
                                                135
                                                153


                                                DN600 93.8
                                                106
                                                119*
                                                130
                                                148
                                                162
                                                184
                                                209

                                                DN700
                                                123
                                                139*
                                                152
                                                173
                                                190
                                                215
                                                244
                                                274
                                                DN800

                                                159
                                                175*
                                                198
                                                218
                                                247
                                                280
                                                314
                                                DN900

                                                179
                                                196
                                                223*
                                                245
                                                278
                                                315
                                                354
                                                DN1000

                                                199
                                                219
                                                248
                                                273*
                                                309
                                                351
                                                395
                                                DN1200

                                                239
                                                263
                                                298
                                                328
                                                372*
                                                422
                                                475

                                                 *) The dimensions recommended by SSAB

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