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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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