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2. Stainless steel pipes

Steel Pipe ASTM A 358/A 358M-01

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Description

ASTM A358/A 358M-01 specifies requirements for welded and heat-treated stainless steel pipe, commonly used in systems for conveying liquids, gases, chemicals, and many other applications. This standard covers welded pipe with heat-treated welds to improve strength and pressure resistance.

Applications

  • Used in boiler systems, high pressure boilers
  • Applications in the oil and gas industry, liquefied gas
  • Used in chemical industry and power plants
  • Used in high temperature piping systems

The table below shows the corresponding thickness and weight for different SCH grades:

Nominal Pipe Size (inch) OD (mm) SCH 10 WT (mm) SCH 10 kg/m SCH 20 WT (mm) SCH 20 kg/m SCH 40 WT (mm) SCH 40 kg/m SCH 80 WT (mm) SCH 80 kg/m SCH 160 WT (mm) SCH 160 kg/m
1/8 10.29 1.24 0.28 1.73 0.39 1.73 0.39 2.41 0.53 3.33 0.69
1/4 13.72 1.65 0.46 2.24 0.61 2.24 0.61 3.02 0.79 4.55 1.08
3/8 17.15 1.65 0.58 2.31 0.78 2.31 0.78 3.20 1.06 4.85 1.43
1/2 21.34 2.11 0.91 2.77 1.13 2.77 1.13 3.73 1.51 6.02 2.24
3/4 26.67 2.11 1.15 2.87 1.54 2.87 1.54 3.91 2.10 6.55 3.09
1 33.40 2.77 1.70 3.38 2.10 3.38 2.10 4.55 2.71 8.84 4.95
1 1/4 42.16 2.77 2.18 3.56 2.78 3.56 2.78 4.85 3.48 9.70 6.45
1 1/2 48.26 2.77 2.52 3.68 3.32 3.68 3.32 5.08 4.07 10.15 8.36
2 60.33 2.77 3.23 3.91 4.51 3.91 4.51 5.54 5.44 11.07 11.55
2 1/2 73.03 3.05 4.05 5.16 7.14 5.16 7.14 7.01 9.50 14.02 18.33
3 88.90 3.05 5.07 5.49 9.54 5.49 9.54 7.62 12.47 15.24 23.27
3 1/2 101.60 3.05 5.79 5.74 11.52 5.74 11.52 8.08 15.08 15.24 29.00
4 114.30 3.05 6.50 6.02 13.38 6.02 13.38 8.56 17.73 16.65 37.38
5 141.30 3.40 8.66 6.55 17.31 6.55 17.31 9.53 23.35 18.26 50.88
6 168.28 3.40 10.38 7.11 22.05 7.11 22.05 10.97 32.02 20.24 67.53
8 219.08 3.76 15.26 8.18 35.57 8.18 35.57 12.70 53.47 23.01 115.90
10 273.05 4.19 21.65 9.27 54.74 9.27 54.74 15.09 81.55 28.58 193.41
12 323.85 4.57 27.64 9.53 70.88 10.31 77.32 17.48 115.31 33.32 285.40
14 355.60 4.78 31.40 11.13 93.36 11.13 93.36 19.05 152.16 35.71 374.65
16 406.40 4.78 36.22 12.70 124.70 12.70 124.70 21.44 195.27 40.49 499.61
18 457.20 4.78 41.08 14.27 160.23 14.27 160.23 23.83 247.88 45.24 648.48
20 508.00 5.54 51.30 15.09 199.50 15.09 199.50 26.19 308.57 50.01 819.28
22 558.80 5.54 56.52 16.13 245.21 16.13 245.21 28.58 378.13 54.76 1017.22
24 609.60 6.35 70.64 17.48 301.16 17.48 301.16 31.75 469.23 60.33 1252.79
26 660.40 7.92 97.91 18.87 366.42 18.87 366.42 35.00 580.85 65.00 1507.97

Pressure

ASTM A358/A 358M-01 includes the following grades, each with its own characteristics and applications:

  • Class 1: Welded pipe with fully heat treated weld (after welding).
  • Class 2: Welded pipe with fully heat treated (post-welded) welds, and non-destructive testing of the welds.
  • Class 3: Welded pipe with non-heat treated (post-welded) weld.
  • Class 4: Welded pipe with the weld completely heat treated (after welding) and the weld is heat treated both inside and outside.
  • Class 5: Welded pipe with fully heat treated welds and non-destructive testing of the welds.

Material

  • The materials used in ASTM A358/A 358M-01 are mainly Austenitic stainless steels such as:
    • TP304
    • TP304L
    • TP316
    • TP316L
    • TP321
    • TP347

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