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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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