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Welded steel pipe ASTM A53
Welded steel pipe ASTM A53
Welded steel pipe ASTM A53
Welded steel pipe ASTM A53
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  • Welded steel pipe ASTM A53
  • Welded steel pipe ASTM A53
  • Welded steel pipe ASTM A53
  • Welded steel pipe ASTM A53

Welded steel pipe ASTM A53

ASTM A53 is the 'Standard Specification for Black and Hot-Dipped, Zinc-Coated, Welded and Seamless Steel Pipe' established by the American Society for Testing and Materials (ASTM), primarily used in pressure piping and mechanical structure fields.

Keyword:

Welded steel pipe ASTM A53

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Classification:

Pipe&tube

Technical documentation:

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Product Details

Details Introduction

Electric Resistance Welding (ERW) uses the thermal effect of current for welding and belongs to the cold working process, which is more efficient. The process is as follows:


 

Raw material preparation
  • Cold-rolled or hot-rolled steel strips are used, and the surface quality requirements are higher (oil stains and oxide scale must be completely removed) to avoid pores during welding.
  • The steel strip is leveled by roller pressing to eliminate internal stress and ensure forming stability.
Continuous forming
  • The steel strip is gradually bent into a tubular shape through a group of forming rollers, and the joints are tightly fitted (gap ≤0.1mm) to create conditions for resistance welding.
  • During the forming process, the alignment of the joints is precisely controlled by the guiding device to ensure the accuracy of the welding position.
Resistance welding
  • A high-frequency current (usually 100-500kHz) is applied to the joint of the tube blank through the electrode, and the heat generated by the metal resistance is used to rapidly heat the joint to a plastic state (approximately 1300-1400°C, not completely melted).
  • At the same time, pressure is applied through the squeeze roller to make the metal atoms at the joint diffuse and combine to form a solid weld (without filler material).
  • Immediately after welding, the weld is cooled by water spraying to control the range of the heat-affected zone (HAZ) and avoid grain growth.
Weld heat treatment (optional)
  • Some high-specification steel pipes need to be annealed: heat the weld area to 700-800°C, and cool slowly to eliminate welding stress and improve weld toughness.
Finishing and surface treatment
  • Same furnace welded steel pipe process: straightening, cutting to length, weld trimming (resistance welding welds are usually thin and can be omitted from grinding).
  • The galvanizing or black pipe treatment method is the same as furnace welding.
Quality inspection
  • In addition to conventional water pressure tests and visual inspections, resistance welded steel pipes need to be added Weld ultrasonic testing , to detect internal defects such as lack of fusion and slag inclusion.
  • Performed in some scenarios Flattening test : Flatten the steel pipe to 1/3 of the outer diameter, and the weld is qualified if there are no cracks, verifying the weld plasticity.
NPS
Marking 		DN
Marking 		Specified outer diameter,
in. [mm] 		Specified wall thickness,
in. [mm] 		per ft(m) light end
Nominal pipe weight,
lb/ft [kg/m] 		Weight
Category 		Pipe number Test pressure
A B
1 ⁄ 8 6 0.405 [10.3] 0.068 [1.73] 0.24 [0.37] STD 40 700 [4800] 700 [4800]
  0.095 [2.41] 0.31 [0.47] XS 80 850 [5900] 850 [5900]
1 ⁄ 4 8 0.540 [13.7] 0.088 [2.24] 0.43 [0.63] STD 40 700 [4800] 700 [4800]
  0.119 [3.02] 0.54 [0.80] XS 80 850 [5900] 850 [5900]
3 ⁄ 7 10 0.675 [17.1] 0.091 [2.31] 0.57 [0.84] STD 40 700 [4800] 700 [4800]
  0.126 [3.20] 0.74 [1.10] XS 80 850 [5900] 850 [5900]
1 ⁄ 2 15 0.840 [21.3] 0.109 [2.77] 0.85 [1.27] STD 40 700 [4800] 700 [4800]
  0.147 [3.73] 1.09 [1.62] XS 80 850 [5900] 850 [5900]
  0.188 [4.78] 1.31 [1.95] .. 160 900 [6200] 900 [6200]
  0.294 [7.47] 1.72 [2.55] XXS .. 1000 [6900] 1000 [6900]
3 ⁄ 4 20 1.050 [26.7] 0.113 [2.87] 1.13 [1.69] STD 40 700 [4800] 700 [4800]
  0.154 [3.91] 1.48 [2.20] XS 80 850 [5900] 850 [5900]
  0.219 [5.56] 1.95 [2.90] .. 160 950 [6500] 950 [6500]
  0.308 [7.82] 2.44 [3.64] XXS .. 1000 [6900] 1000 [6900]
1 25 1.315 [33.4] 0.133 [3.38] 1.68 [2.50] STD 40 700 [4800] 700 [4800]
  0.179 [4.55] 2.17 [3.24] XS 80 850 [5900] 850 [5900]
  0.250 [6.35] 2.85 [4.24] .. 160 950 [6500] 950 [6500]
  0.358 [9.09] 3.66 [5.45] XXS .. 1000 [6900] 1000 [6900]
1
1  ⁄ 2		 32 1.660 [42.2] 0.140 [3.56] 2.27 [3.39] STD 40 1200 [8300] 1300 [9000]
  0.191 [4.85] 3.00 [4.47] XS 80 1800 [12 400] 1900 [13 100]
  0.250 [6.35] 3.77 [5.61] .. 160 1900 [13 100] 2000 [13 800]
  0.382 [9.70] 5.22 [7.77] XXS .. 2200 [15 200] 2300 [15 900]
1
1  ⁄ 4		 40 1.900 [48.3] 0.145 [3.68] 2.72 [4.05] STD 40 1200 [8300] 1300 [9000]
  0.200 [5.08] 3.63 [5.41] XS 80 1800 [12 400] 1900 [13 100]
  0.281 [7.14] 4.86 [7.25] .. 160 1950 [13 400] 2050 [14 100]
      0.400 [10.16] 6.41 [9.56] XXS .. 2200 [15 200] 2300 [15 900]
2 50 2.375 [60.3] 0.154 [3.91] 3.66 [5.44] STD 40 2300 [15 900] 2500 [17 200]
  0.218 [5.54] 5.03 [7.48] XS 80 2500 [17 200] 2500 [17 200]
  0.344 [8.74] 7.47 [11.11] .. 160 2500 [17 200] 2500 [17 200]
  0.436 [11.07] 9.04 [13.44] XXS .. 2500 [17 200] 2500 [17 200]
1
2  ⁄ 2		 65 2.875 [73.0] 0.203 [5.16] 5.80 [8.63] STD 40 2500 [17 200] 2500 [17 200]
  0.276 [7.01] 7.67 [11.41] XS 80 2500 [17 200] 2500 [17 200]
  0.375 [9.52] 10.02 [14.90] .. 160 2500 [17 200] 2500 [17 200]
  0.552 [14.02] 13.71 [20.39] XXS .. 2500 [17 200] 2500 [17 200]
3 80 3.500 [88.9] 0.125 [3.18] 4.51 [6.72] .. .. 1290 [8900] 1500 [1000]
  0.156 [3.96] 5.58 [8.29] .. .. 1600 [11 000] 1870 [12 900]
  0.188 [4.78] 6.66 [9.92] .. .. 1930 [13 330] 2260 [15 600]
  0.216 [5.49] 7.58 [11.29] STD 40 2220 [15 300] 2500 [17 200]
  0.250 [6.35] 8.69 [12.93] .. .. 2500 [17 200] 2500 [17 200]
  0.281 [7.14] 9.67 [14.40] .. .. 2500 [17 200] 2500 [17 200]
  0.300 [7.62] 10.26 [15.27] XS 80 2500 [17 200] 2500 [17 200]
  0.438 [11.13] 14.34 [21.35] .. 160 2500 [17 200] 2500 [17 200]
  0.600 [15.24] 18.60 [27.68] XXS .. 2500 [17 200] 2500 [17 200]
1
3  ⁄ 2		 90 4.000 [101.6] 0.125 [3.18] 5.18 [7.72] .. .. 1120 [7700] 1310 [19 000]
  0.156 [3.96] 6.41 [9.53] .. .. 1400 [6700] 1640 [11 300]
  0.188 [4.78] 7.66 [11.41] .. .. 1690 [11 700] 1970 [13 600]
  0.226 [5.74] 9.12 [13.57] STD 40 2030 [14 000] 2370 [16 300]
  0.250 [6.35] 10.02 [14.92] .. .. 2250 [15 500] 2500 [17 200]
  0.281 [7.14] 11.17 [16.63] .. .. 2500 [17 200] 2500 [17 200]
  0.318 [8.08] 12.52 [18.63] XS 80 2800 [19 300] 2800 [19 300]
4 100 4.500 [114.3] 0.125 [3.18] 5.85 [8.71] .. .. 1000 [6900] 1170 [8100]
0.156 [3.96] 7.24 [10.78] .. .. 1250 [8600] 1460 [10 100]
0.188 [4.78] 8.67 [12.91] .. .. 1500 [10 300] 1750 [12 100]
0.219 [5.56] 10.02 [14.91] .. .. 1750 [12 100] 2040 [14 100]
0.237 [6.02] 10.80 [16.07] STD 40 1900 [13 100] 2210 [15 200]
0.250 [6.35] 11.36 [16.90] .. .. 2000 [13 800] 2330 [16 100]
0.281 [7.14] 12.67 [18.87] .. .. 2250 [15 100] 2620 [18 100]
0.312 [7.92] 13.97 [20.78] .. .. 2500 [17 200] 2800 [19 300]
0.337 [8.56] 15.00 [22.32] XS 80 2700 [18 600] 2800 [19 300]
0.438 [11.13] 19.02 [28.32] .. 120 2800 [19 300] 2800 [19 300]
0.531 [13.49] 22.53 [33.54] .. 160 2800 [19 300] 2800 [19 300]
0.674 [17.12] 27.57 [41.03] XXS .. 2800 [19 300] 2800 [19 300]
5 125 5.563 [141.3] 0.156 [3.96] 9.02 [13.41] .. .. 1010 [7000] 1180 [8100]
0.188 [4.78] 10.80 [16.09] .. .. 1220 [8400] 1420 [9800]
0.219 [5.56] 12.51 [18.61] .. .. 1420 [9800] 1650 [11 400]
0.258 [6.55] 14.63 [21.77] STD 40 1670 [11 500] 1950 [13 400]
0.281 [7.14] 15.87 [23.62] .. .. 1820 [12 500] 2120 [14 600]
0.312 [7.92] 17.51 [26.05] .. .. 2020 [13 900] 2360 [16 300]
0.344 [8.74] 19.19 [28.57] .. .. 2230 [15 400] 2600 [17 900]
0.375 [9.52] 20.80 [30.94] XS 80 2430 [16 800] 2800 [19 300]
0.500 [12.70] 27.06 [40.28] .. 120 2800 [19 300] 2800 [19 300]
0.625 [15.88] 32.99 [49.11] .. 160 2800 [19 300] 2800 [19 300]
6 150 6.625 [168.3] 0.188 [4.78] 12.94 [19.27] .. .. 1020 [7000] 1190 [8200]
0.219 [5.56] 15.00 [22.31] .. .. 1190 [8200] 1390 [9600]
0.250 [6.35] 17.04 [25.36] .. .. 1360 [9400] 1580 [10 900]
0.280 [7.11] 18.99 [28.26] STD 40 1520 [10 500] 1780 [12 300]
0.312 [7.92] 21.06 [31.32] .. .. 1700 [11 700] 1980 [13 700]
0.344 [8.74] 23.10 [34.39] .. .. 1870 [12 900] 2180 [15 000]
0.375 [9.52] 25.05 [37.28] .. .. 2040 [14 100] 2380 [16 400]
0.432 [10.97] 28.60 [42.56] XS 80 2350 [16 200] 2740 [18 900]
0.562 [14.27] 36.43 [54.20] .. 120 2800 [19 300] 2800 [19 300]
0.719 [18.26] 45.39 [67.56] .. 160 2800 [19 300] 2800 [19 300]
8 200 8.625 [219.1] 0.188 [4.78] 16.96 [25.26] .. .. 780 [5400] 920 [6300]
0.203 [5.16] 18.28 [27.22] .. .. 850 [5900] 1000 [6900]
0.219 [5.56] 19.68 [29.28] .. .. 910 [6300] 1070 [7400]
0.250 [6.35] 22.38 [33.31] .. 20 1040 [7200] 1220 [8400]
0.277 [7.04] 24.72 [36.31] .. 30 1160 [7800] 1350 [9300]
0.312 [7.92] 27.73 [41.24] .. .. 1300 [9000] 1520 [10 500]
0.322 [8.18] 28.58 [42.55] STD 40 1340 [9200] 1570 [10 800]
0.344 [8.74] 30.45 [45.34] .. .. 1440 [9900] 1680 [11 600]
0.375 [9.52] 33.07 [49.20] .. .. 1570 [10 800] 1830 [12 600]
0.406 [10.31] 35.67 [53.08] .. 60 1700 [11 700] 2000 [13 800]
0.438 [11.13] 38.33 [57.08] .. .. 1830 [12 600] 2130 [14 700]
0.500 [12.70] 43.43 [64.64] XS 80 2090 [14 400] 2430 [16 800]
0.594 [15.09] 51.00 [75.92] .. 100 2500 [17 200] 2800 [19 300]
0.719 [18.26] 60.77 [90.44] .. 120 2800 [19 300] 2800 [19 300]
0.812 [20.62] 67.82 [100.92] .. 140 2800 [19 300] 2800 [19 300]
0.875 [22.22] 72.49 [107.88] XXS .. 2800 [19 300] 2800 [19 300]
0.906 [23.01] 74.76 [111.27] .. 160 2800 [19 300] 2800 [19 300]
10 250 10.750 [273.0] 0.188 [4.78] 21.23 [31.62] .. .. 630 [4300] 730 [5000]
0.219 [5.56] 24.65 [36.67] .. .. 730 [5000] 860 [5900]
0.250 [6.35] 28.06 [41.75] .. 20 840 [5800] 980 [6800]
0.279 [7.09] 31.23 [46.49] .. .. 930 [6400] 1090 [7500]
0.307 [7.80] 34.27 [51.01] .. 30 1030 [7100] 1200 [8300]
0.344 [8.74] 38.27 [56.96] .. .. 1150 [7900] 1340 [9200]
0.365 [9.27] 40.52 [60.29] STD 40 1220 [8400] 1430 [9900]
0.438 [11.13] 48.28 [71.87] .. .. 1470 [10 100] 1710 [11 800]
0.500 [12.70] 54.79 [81.52] XS 60 1670 [11 500] 1950 [13 400]
0.594 [15.09] 64.49 [95.97] .. 80 1990 [13 700] 2320 [16 000]
0.719 [18.26] 77.10 [114.70] .. 100 2410 [16 600] 2800 [19 300]
0.844 [21.44] 89.38 [133.00] .. 120 2800 [19 300] 2800 [19 300]
1.000 [25.40] 104.23 [155.09] XXS 140 2800 [19 300] 2800 [19 300]
1.125 [28.57] 115.75 [172.21] .. 160 2800 [19 300] 2800 [19 300]
12 300 12.750 [323.8] 0.203 [5.16] 27.23 [40.55] .. .. 570 [3900] 670 [4600]
0.219 [5.56] 29.34 [43.63] .. .. 620 [4300] 720 [5000]
0.250 [6.35] 33.41 [49.71] .. 20 710 [4900] 820 [5700]
0.281 [7.14] 37.46 [55.75] .. .. 790 [5400] 930 [6400]
0.312 [7.92] 41.48 [61.69] .. .. 880 [6100] 1030 [7100]
0.344 [8.74] 45.62 [67.90] .. .. 970 [6700] 1130 [7800]
0.375 [9.52] 49.61 [73.78] STD .. 1060 [7300] 1240 [8500]
0.406 [10.31] 53.57 [79.70] .. 40 1150 [7900] 1340 [9200]
0.438 [11.13] 57.65 [85.82] .. .. 1240 [8500] 1440 [9900]
0.500 [12.70] 65.48 [97.43] XS .. 1410 [9700] 1650 [11 400]
0.562 [14.27] 73.22 [108.92] .. 60 1590 [11 000] 1850 [12 800]
0.688 [17.48] 88.71 [132.04] .. 80 1940 [13 400] 2270 [15 700]
0.844 [21.44] 107.42 [159.86] .. 100 2390 [16 500] 2780 [19 200]
1.000 [25.40] 125.61 [186.91] XXS 120 2800 [19 300] 2800 [19 300]
1.125 [28.57] 139.81 [208.00] .. 140 2800 [19 300] 2800 [19 300]
1.312 [33.32] 160.42 [238.68] .. 160 2800 [19 300] 2800 [19 300]

 

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