Products

ERW Steel Pipe

ERW Steel Pipe

    ERW steel pipes means Electric Resistance Welded Pipes.

    Standards of erw steel pipe
    ERW Pipe
    ASTM ASTM A53 B, ASTM A178, ASTM A252 GR.2, A500, ASTM A513
    API  API 5L X42/46/52/56/60/70
    EN EN 10204/10217 S235JR,S275JR,S355,S355JR,S355J2H
     
    EFW Pipe
    Carbon steel ASTM A671,ASTM A672
    Alloy steel ASTM A691

    Sizes of erw steel pipe
    Out diameter: 1/2" -24" (21.3mm-610mm) 
    Wall thickness:   1.65mm-20mm


    Manufacturing Process of ERW steel pipe
    Electric Resistance Welded (ERW) pipe is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to form a bond. The longitudinal ERW seam does not require filler metal.



    Details of production

    Recieving and offloading of coil                                                                                  Coil feed ramp

    Receiving and unloading of coils for ERW pipes  Coil feed ramp for ERW pipe
    Coil to coil end welding                                                                                                Strip accumulator
     Strip accumulator of ERW pipe
    Rough edge conditionting of coil                                                                                Fine edge conditioning of strip before welder
     
    Breakdown and fin cold rolling stands                                                                      High frequency erw welder
     
    Annealing of weld seam for superior strength                                                        Final shape pass
    Annealing of weld seam for superior strength Final shape pass
    In-line traveling saw                                                                                                      Hydrostatic pressure testing and straightening
    In-line traveling saw 
    Full weld integrity inspection                                                                                      Beveling,cut-off and shipping
    Full weld integrity inspection of ERW pipe Beveling,cut-off and shipping of ERW pipe
    Small diameter
    Out diameter Sch 5 Sch 10 Sch 40
    Inch mm Thickness Kg/mtr Thickness Kg/mtr Thickness Kg/mtr
    1/2" 21.3 1.65 0.81 2.11 1.01 2.77 1.29
    3/4" 26.7 1.65 1.03 2.11 1.30 2.87 1.71
    1" 33.4 1.65 1.31 2.77 2.12 3.38 2.54
    1 1/4" 42.2 1.65 1.93 2.77 3.15 3.68 4.11
    1 1/2" 48.3 1.65 1.93 2.77 3.15 3.68 4.11
    2" 60.3 1.65 2.42 2.77 3.98 4.81 5.31
    3" 88.9 2.11 4.58 3.05 6.54 5.49 11.45
    3 1/2" 101.6 2.11 5.25 3.05 7.52 5.74 13.77
    4" 114.3 2.11 5.25 3.05 7.52 5.74 13.77
    5" 141.3 2.77 9.50 3.40 11.74 6.55 22.10
    6" 168.3 2.77 11.47 3.40 14.04 7.11 28.68
    8" 219.1 2.77 14.99 3.76 20.25 8.18 43.16

    Large diameter
    OD WT                                  
    Inch mm 8 5/8" 219.1mm 10 3/4" 273.1
    mm
    12 3/4" 325.0
    mm
    14" 355.6
    mm
    16" 406.4
    mm
    18" 457.7
    mm
    20" 508.0
    mm
    24" 610
    mm
    24 4/5" 630.0
    mm
    0.157 4.0 ---- ---                                
    0.197 5.0 --- --- --- --- --- --- --- ---                    
    0.236 6.0 --- --- --- --- --- --- --- --- --- --- --- ---            
    0.276 7.0 --- --- --- --- --- --- --- --- --- --- --- --- --- ---        
    0.315 8.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---    
    0.354 9.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---    
    0.394 10.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    0.133 11.0 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    0.492 12.5 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    0.551 14.0         --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    0.630 16.0         --- --- --- --- --- --- --- --- --- --- --- --- --- ---
    0.689 17.5                 --- --- --- --- --- --- --- --- --- ---
    0.748 19.0                     --- --- --- --- --- --- --- ---
    0.787 20.0                         --- --- --- --- --- ---
    ERW pipeERW steel pipeastm a53 grade b erw pipeA106 GR.B ERW pipeA53 ERW PipeA53b ERW

Know more about this product price, catalogue, mill test certificate,  please inquiry to: sales@nan-steel.com

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