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ERW Steel pipe

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OD

21.3mm -660mm

W.T

1mm-20mm

LENGTH

0.5mtr-22mtr

Surface

Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement

Standard

API5L, ASTM A53 GR.B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217; API SPEC 5L ISO 3183 GB/T 9711.1 GB/T 9711.2 GB/T 9711.3

Ends

Square Ends (straight cut, saw cut) Beveled Ends

                                                                                                                                                                                                                                    Small diameter erw pipe specification

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 erw pipe specification

OD WT
Inch mm 8 5/8"
219.1mm
10 3/4"
273.1mm
12 3/4"
325.0mm
14"
355.6mm
16"
406.4mm
18"
457.7mm
20"
508.0mm
24"
610mm
24 4/5"
630.0mm
0.157 4.0 ---- ---















0.197 5.0 --- --- --- --- --- --- --- ---










0.236 6.0 --- --- --- --- --- --- --- ---
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0.394 10.0 --- --- --- --- --- --- --- ---
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0.492 12.5 --- --- --- --- --- --- --- ---
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0.551 14.0



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0.630 16.0



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0.689 17.5







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0.748 19.0









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0.787 20.0











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ERW tube process

Precision welded tubes are manufactured by the High Frequency Induction Welding Process which is commonly known as ERW process. After slitting the small slits/coil in desired sizes, slit coils are transferred to Steel Tubes Manufacturing Mills. Coils are loaded on Pay off Reel and passed through looping cage then to series of forming rolls which bend the strip in tubular form with abutting edges.The abutting edges are then heated to the required Welding Temperature by means of High Frequency Induction The externally & internally Flash removed with the help of Scarfing Tools, then welded pipe passes through coolant tank and cooled. The pipe passes through sizing section where the outer dia is maintained & pipe straightened with the help of Turk Head. The required length is cut on cut off carriage on line without stopping the mill. The cut length pipe is rolled out on conveyor & stopped by stopper at end of Conveyor and ejected to the pipe collecting pockets.