ASTM A106 seamless pipe
ASTM A106 is a standard specification for seamless carbon steel pipe used in high-temperature service.
ASTM A106 steel pipe mainly covers three grades: Grade A, Grade B, and Grade C.These grades are distinguished primarily by their chemical compositions and mechanical properties, which determine their suitability for different applications involving varying temperatures and pressures.
Grade C typically has higher tensile and yield strengths compared to Grades A and B, making it suitable for more demanding high-pressure, high-temperature environments, while Grades A and B are often used in less severe conditions.
Size of ASTM A106 sMLS pipe
| ASTM A106 Pipe Dimensions Chart ANSI B36.10 | |||||||||||||||
| NPS | DN | OD | SCH | SCH | SCH | SCH | SCH | SCH | SCH | SCH | SCH | SCH | SCH | SOH | SOH |
| 10 | 20 | 30 | Sth | 40 | 60 | XS | 80 | 100 | 120 | 140 | 160 | XXS | |||
| 1/2 | 15 | 21.3 | 2.11 | 2.41 | 2.77 | 2.77 | 3.73 | 3.73 | 4.78 | 7.47 | |||||
| 3/4 | 20 | 26.7 | 2.11 | 2.41 | 2.87 | 2.87 | 3.91 | 3.91 | 5.56 | 7.82 | |||||
| 1 | 25 | 33.4 | 2.77 | 2.9 | 3.38 | 3.38 | 4.55 | 4.55 | 6.35 | 9.09 | |||||
| 11/4 | 32 | 42.2 | 2.77 | 2.97 | 3.56 | 3.56 | 4.85 | 4.85 | 6.35 | 9.7 | |||||
| 11/2 | 40 | 48.3 | 2.77 | 3.18 | 3.68 | 3.68 | 5.08 | 5.08 | 7.14 | 10.15 | |||||
| 2 | 50 | 60.3 | 2.77 | 3.18 | 3.91 | 3.91 | 5.54 | 5.54 | 8.74 | 11.07 | |||||
| 2 1/2 | 65 | 73 | 3.05 | 4.78 | 5.16 | 5.16 | 7.01 | 7.01 | 9.53 | 14.02 | |||||
| 3 | 80 | 88.9 | 3.05 | 4.78 | 5.49 | 5.49 | 7.62 | 7.62 | 11.13 | 15.24 | |||||
| 3 1/2 | 90 | 101.6 | 3.05 | 4.78 | 5.74 | 5.74 | 8.08 | 8.08 | |||||||
| 4 | 100 | 114.3 | 3.05 | 4.78 | 6.02 | 6.02 | 8.56 | 8.56 | 11.13 | 13.49 | 17.12 | ||||
| 5 | 125 | 141.3 | 3.4 | 6.55 | 6.55 | 9.53 | 9.53 | 12.7 | 15.88 | 19.05 | |||||
| 6 | 150 | 168.3 | 3.4 | 7.11 | 7.11 | 10.97 | 10.97 | 14.27 | 18.26 | 21.95 | |||||
| 8 | 200 | 219.1 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 10.31 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
| 10 | 250 | 273 | 4.19 | 6.35 | 7.8 | 9.27 | 9.27 | 12.7 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 25.4 |
| 12 | 300 | 323.8 | 4.57 | 6.35 | 8.38 | 9.53 | 10.31 | 14.27 | 12.7 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 |
| 14 | 350 | 355.6 | 6.35 | 7.92 | 9.53 | 9.53 | 11.13 | 15.09 | 12.7 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | |
| 16 | 400 | 406.4 | 6.35 | 7.92 | 9.53 | 9.53 | 12.7 | 16.66 | 12.7 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | |
| 18 | 450 | 457 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 19.05 | 12.7 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | |
| 20 | 500 | 508 | 6.35 | 9.53 | 12.7 | 9.53 | 15.09 | 20.62 | 12.7 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | |
| 22 | 550 | 559 | 6.35 | 9.53 | 12.7 | 9.53 | 22.23 | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | ||
| 24 | 600 | 610 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 24.61 | 12.7 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | |
Chemical Requirements of ASTM A106 sMLS pipe
| Composition, % | |||
| Grade A | Grade B | Grade C | |
| Carbon, max | 0.25A | 0.30B | 0.35B |
| Manganese | 0.27-0.93 | 0.29-1.06 | 0.29-1.06 |
| Phosphorus, max | 0.035 | 0.035 | 0.035 |
| Sulfur, max | 0.035 | 0.035 | 0.035 |
| Silicon, min | 0.1 | 0.1 | 0.1 |
| Chromium, maxC | 0.4 | 0.4 | 0.4 |
| Copper, maxC | 0.4 | 0.4 | 0.4 |
| Molybdenum, maxC | 0.15 | 0.15 | 0.15 |
| Nickel, maxC | 0.4 | 0.4 | 0.4 |
| Vanadium, maxC | 0.08 | 0.08 | 0.08 |
| A For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %. B Unless otherwise specified by the purchaser, for each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.65 %. C These five elements combined shall not exceed 1 %. |
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mechanical properties of ASTM A106 sMLS pipe
| Grade A | Grade B | Grade C | ||||
| Tensile strength, min, psi [MPa] | 48 000 [330] | 60 000 [415] | 70 000 [485] | |||
| Yield strength, min, psi [MPa] | 30 000 [205] | 35 000 [240] | 40 000 [275] | |||
| Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | |
| Elongation in2 in. [50 mm],min,%: | ||||||
| Basic minimum elongation transverse strip tests, and for all small sizes tested in full section | 35 | 25 | 30 | 16.5 | 30 | 16.5 |
| When standard round 2-in. [50-mm] gauge length test specimen is used | 28 | 20 | 22 | 12 | 20 | 12 |
| For longitudinal strip tests | A | A | A | |||
| For transverse strip tests, a deduction for each 1/32-in. [0.8-mm] decrease in wall thickness below 5/16 in. [7.9 mm] from the basic minimum elongation of the following percentage shall be made | 1.25 | 1.00 | 1.00 | |||
| A The minimum elongation in 2 in. [50 mm] shall be determined by the following equation: e=625000A0.2/ U0.9 for inch-pound units, and e=1940A0.2/U0.9 for SI units, where: e = minimum elongation in 2 in. [50 mm], %, rounded to the nearest 0.5 %, A = cross-sectional area of the tension test specimen, in.2 [mm2], based upon specified outside diameter or nominal specimen width and specified wall thickness,rounded to the nearest 0.01 in.2 [1 mm2]. (If the area thus calculated is equal to or greater than 0.75 in.2 [500mm2], then the value 0.75 in.2 [500mm2]shall be used.), and U = specified tensile strength, psi [MPa] |
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Dimensions, Mass, and Permissible Variations Of ASTM A106 SMLS Pipe
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Mass Of ASTM A106 seamless Pipe
The mass of any length of pipe shall not vary more than 10 % over and 3.5 % under that specified. Unless otherwise agreed upon between the manufacturer and the purchaser, pipe in NPS 4 (DN 100) and smaller may be weighed in convenient lots; pipe larger than NPS 4 (DN 100) shall be weighed separately.
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Diameter Of ASTM A106 seamless Pipe
Except as provided for thin-wall pipe in paragraph 12.2 of Specification A530/A530M, the tolerances for diameter shall be in accordance with the following:
Except for pipe ordered as special outside diameter tolerance pipe or as inside diameter tolerance pipe, variations in outside diameter shall not exceed those given in the table below.
| NPS [DN Designator] | Permissible Variations in Outside Diameter | |||
| Over | Under | |||
| in. | mm | in. | mm | |
| 1/8 to 11/2 [6 to 40], incl | 1/64(0.015) | 0.4 | 1/64 (0.015) | 0.4 |
| Over 11/2 to 4 [40 to 100],incl | 1/32 (0.031) | 0.8 | 1/32 (0.031) | 0.8 |
| Over 4 to 8 [100 to 200], incl | 1/16 (0.062) | 1.6 | 1/32 (0.031) | 0.8 |
| Over 8 to 18 [200 to 450], incl | 3/32 (0.093) | 2.4 | 1/32 (0.031) | 0.8 |
| Over 18 to 26 [450 to 650], incl | 1/8 (0.125) | 3.2 | 1/32 (0.031) | 0.8 |
| Over 26 to 34 [650 to 850],incl | 5/32 (0.156) | 4 | 1/32 (0.031) | 0.8 |
| Over 34 to 48 [850 to 1200], incl | 3/16 (0.187) | 4.8 | 1/32 (0.031) | 0.8 |
For pipe over 10 in. (250 mm) OD ordered as special outside diameter tolerance pipe, the outside diameter shall not vary more than 1 % over or 1 % under the specified outsidediameter. For pipe over 10 in. (250 mm) ID ordered as inside diameter tolerance pipe, the inside diameter shall not vary more than 1 % over or 1 % under the specified inside diameter.
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Thickness Of ASTM A106 seamless Pipe
The minimum wall thickness at any point shall not be more than 12.5 % under the specified wall thickness.