Designation: A333/A333M | ||||||||||||||||||||
Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service | ||||||||||||||||||||
Chemical Requirements | ||||||||||||||||||||
Element | Compositions, % | |||||||||||||||||||
Grade 1A | Grade 3 | Grade 4 | Grade 6a | Grade 7 | Grade 8 | Grade 9 | Grade 10 | Grade 11 | ||||||||||||
Cacbon max | 0.3 | 0.19 | 0.12 | 0.3 | 0.19 | 0.13 | 0.2 | 0.2 | 0.1 | |||||||||||
Manganese | 0.40-1.06 | 0.31-0.64 | 0.50-1.05 | 0.29-1.06 | 0.90 max | 0.90 max | 0.40-1.06 | 1.15-1.50 | 0.60 max | |||||||||||
Phosphorus, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.035 | 0.025 | |||||||||||
Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.015 | 0.025 | |||||||||||
Silicon | … | 0.18-0.37 | 0.08-0.37 | 0.10 min | 0.13-0.32 | 0.13-0.32 | … | 0.10-0.35 | 0.35 max | |||||||||||
Nickel | … | 3.18-3.82 | 0.47-0.98 | … | 2.03-2.57 | 8.40-9.60 | 1.60-2.24 | 0.25 max | 35.0-37.0 | |||||||||||
Chromium | … | … | 0.44-1.01 | … | … | … | … | 0.15 max | 0.50 max | |||||||||||
Copper | … | … | 0.40-0.75 | … | … | … | 0.75-1.25 | 0.15 max | … | |||||||||||
Aluminum | … | … | 0.04-0.30 | … | … | … | … | 0.06 max | … | |||||||||||
Vanadium max | … | … | … | … | … | … | … | 0.12 | … | |||||||||||
Columbium max | … | … | … | … | … | … | … | 0.05 | … | |||||||||||
Molybdenum max | … | … | … | … | … | … | … | 0.05 | 0.50 max | |||||||||||
Cobalt | … | … | … | … | … | … | … | … | 0.50 max | |||||||||||
AFor each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese. | ||||||||||||||||||||
Stress relieving of test pieces | ||||||||||||||||||||
Metal temperatureA,B |
Minimum holding time, h/in. [min/mm] of thickness |
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Grade 1, 3, 6, 7, and 10 | Grade 4C | |||||||||||||||||||
°F | °C | °F | °C | |||||||||||||||||
1100 | 600 | 1150 | 620 | 1 [2.4] | ||||||||||||||||
1050 | 565 | 1100 | 600 | 2 [4.7] | ||||||||||||||||
1000 | 540 | 1050 | 565 | 3 [7.1] | ||||||||||||||||
AFor intermediate temperatures, the holding time shall be determined by straight line interpolation. | ||||||||||||||||||||
BGrade 8 shall be stress relieved at 1025 to 1085°F, [550 to 585°C], held for minimum time of 2 h for thickness up to 1.0 in. [25.4mm], plus a minimum of 1 h for each additional inch [25.4mm] of thickness and cooled at a minimim rate of 300°F [165°C}/h in air or water to a temperature not exceeding 600°F [315°C]. | ||||||||||||||||||||
CUnless otherwise specified, Grade 4 shall be stress relieved at 1150°F [620°C]. | ||||||||||||||||||||
Tensile requirements | ||||||||||||||||||||
Grade 1 | Grade 3 | Grade 4 | Grade 6a | Grade 7 | Grade 8 | Grade 9 | Grade 10 | Grade 11 | ||||||||||||
psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | psi | Mpa | |||
Tensile strength, min | 55 000 | 380 | 65 000 | 450 | 60 000 | 415 | 60 000 | 415 | 65 000 | 450 | 100 000 | 690 | 63 000 | 435 | 80 000 | 550 | 65 000 | 450 | ||
Yield strength, min | 30 000 | 205 | 35 000 | 240 | 35 000 | 240 | 35 000 | 240 | 35 000 | 240 | 75 000 | 515 | 46 000 | 315 | 65 000 | 450 | 35 000 | 240 | ||
Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | ||||
Elongation in 2 in. or 50 mm, or 4D, min, %: Basic minimum elongation for walls 5/16 in. [8mm] and over in thickness, strip tests, and for all small sizes tested in full section | 35 | 25 | 30 | 20 | 30 | 16.5 | 30 | 16.5 | 30 | 22 | 22 | … | 28 | … | 22 | … | 18A | |||
When standard round 2-in. or 50-mm gage length or proportionally smaller size test specimen with the gage length equal to 4D (4 times the diameter) is used | 28 | 20 | 22 | 14 | 22 | 12 | 22 | 12 | 22 | 14 | 16 | … | … | … | 16 | … | … | |||
For strip tests, a deduction for each 1/32 in. [0.8mm] decrease in wall thickness below 5/16 in. [8mm] from the basic minimum elongation of the following percentage. | 1.75B | 1.25B | 1.50B | 1.00B | 1.50B | 1.00B | 1.5B | 1.00B | 1.5B | 1.00B | 1.25B | … | 1.50B | … | 1.25B | … | … | |||
Wall thickness | Elongation in 2 in. Or 50 mm, min, %C | |||||||||||||||||||
Grade 1 | Grade 3 | Grade 4 | Grade 6 | Grade 7 | Grade 8 | Grade 9 | Grade 10 | |||||||||||||
in. | mm | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | |||
5/16 90.312) | 8 | 35 | 25 | 30 | 20 | 30 | 16 | 30 | 16 | 30 | 22 | 22 | … | 28 | … | 22 | … | |||
9/32 (0.281) | 7.2 | 33 | 24 | 28 | 19 | 28 | 15 | 28 | 15 | 28 | 21 | 21 | … | 26 | … | 21 | … | |||
1/4 (0.250 ) | 6.4 | 32 | 23 | 27 | 18 | 27 | 15 | 27 | 15 | 27 | 20 | 20 | … | 25 | … | 20 | … | |||
7/32 (0.219) | 5.6 | 30 | … | 26 | … | 26 | … | 26 | … | 26 | … | 18 | … | 24 | … | 18 | … | |||
3/16 (0.188) | 4.8 | 28 | … | 24 | … | 24 | … | 24 | … | 24 | … | 17 | … | 22 | … | 17 | … | |||
5/32 (0.156) | 4 | 26 | … | 22 | … | 22 | … | 22 | … | 22 | … | 16 | … | 20 | … | 16 | … | |||
1/8 (0.125) | 3.2 | 25 | … | 21 | … | 21 | … | 21 | … | 21 | … | 15 | … | 19 | … | 15 | … | |||
3/32 (0.094) | 2.4 | 23 | … | 20 | … | 20 | … | 20 | … | 20 | … | 13 | … | 18 | … | 13 | … | |||
1/16 (0.062) | 1.6 | 21 | … | 18 | … | 18 | … | 18 | … | 18 | … | 12 | … | 16 | … | 12 | … | |||
AElongation of grade 11 is for all walls and small sizes tested in full section. | ||||||||||||||||||||
BThe following table gives the calculated minimum values. | ||||||||||||||||||||
CCaculated elongation requirements shall be rounded to the nearest whole number. | ||||||||||||||||||||
Note-the preceding table gives the computed minimum elongation values for each 1/32-in.[0.80-mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value is determined by the following equation: | ||||||||||||||||||||
Grade | Direction of test | Equation | ||||||||||||||||||
1 | Longitudinal | E = 56t +17.50 [E =2.19t + 17.50] | ||||||||||||||||||
Transverse | E = 40t + 12.50 [E = 1.56t + 12.50] | |||||||||||||||||||
3 | Longitudinal | E = 48t + 15.00 [ E = 1.87t + 15.00] | ||||||||||||||||||
Transverse | E = 32t + 10.00 [ E = 1.25t + 10.00] | |||||||||||||||||||
4 | Longitudinal | E = 48t + 15.00 [E = 1.87t + 15.00] | ||||||||||||||||||
Transverse | E = 32t + 6.50 [E = 1.25t+ 6.50] | |||||||||||||||||||
6 | Longitudinal | E = 48t + 15.00 [E = 1.87t + 15.00] | ||||||||||||||||||
Transverse | E = 32t + 6.50 [E = 1.25t + 6.50] | |||||||||||||||||||
7 | Longitudinal | E = 48t + 15.00 [E = 1.87t + 15.00] | ||||||||||||||||||
Transverse | E = 32t + 11.00 [E = 1.25t + 11.00] | |||||||||||||||||||
8 and 10 | Longitudinal | E = 40t + 9.50 [E = 1.56t + 9.50] | ||||||||||||||||||
9 | Longitudinal | E = 48t + 13.00 [E = 1.87t + 13.00] | ||||||||||||||||||
Where: | ||||||||||||||||||||
E = elongation in 2 in. or 50 mm, in %, and | ||||||||||||||||||||
t = actual thickness of specimen, in. [mm]. | ||||||||||||||||||||
Impact requirement for grades 1,3,4,6,7,9, and 10 | ||||||||||||||||||||
Size of specimen, mm | Minimum average notched bar impact value of each set of three specimensA | Minimum notched bar impact value of one specimen only of a setA | ||||||||||||||||||
ft lbf | J | ft lbf | J | |||||||||||||||||
10 by 10 | 13 | 18 | 10 | 14 | ||||||||||||||||
10 by 7.5 | 10 | 14 | 8 | 11 | ||||||||||||||||
10 by 6.67 | 9 | 12 | 7 | 9 | ||||||||||||||||
10 by 5 | 7 | 9 | 5 | 7 | ||||||||||||||||
10 by 3.33 | 5 | 7 | 3 | 4 | ||||||||||||||||
10 by 2.5 | 4 | 5 | 3 | 4 | ||||||||||||||||
AStraight line interpolation for intermediate values is permitted. | ||||||||||||||||||||
Impact temperature reduction | ||||||||||||||||||||
Specimen width along notch or actual material thickness | Temperature reduction, degrees colderA | |||||||||||||||||||
in. | mm | °F | °C | |||||||||||||||||
0.394 | 10 (standard size) | 0 | 0 | |||||||||||||||||
0.354 | 9 | 0 | 0 | |||||||||||||||||
0.315 | 8 | 0 | 0 | |||||||||||||||||
0.295 | 7.5 (3/4 std. size) | 5 | 3 | |||||||||||||||||
0.276 | 7 | 8 | 4 | |||||||||||||||||
0.262 | 6.67 (2/3 std. size) | 10 | 5 | |||||||||||||||||
0.236 | 6 | 15 | 8 | |||||||||||||||||
0.197 | 5 (1/2 std. size) | 20 | 11 | |||||||||||||||||
0.158 | 4 | 30 | 17 | |||||||||||||||||
0.131 | 3.33 (1/3 std. size) | 35 | 19 | |||||||||||||||||
0.118 | 3 | 40 | 22 | |||||||||||||||||
0.099 | 2.5 (1/4 std. size) | 50 | 28 | |||||||||||||||||
AStraight line interpolation for intermediate values is permitted | ||||||||||||||||||||
Grade | Minimum impact test temperature | |||||||||||||||||||
°F | °C | |||||||||||||||||||
1 | -50 | -45 | ||||||||||||||||||
3 | -150 | -100 | ||||||||||||||||||
4 | -150 | -100 | ||||||||||||||||||
6 | -50 | -45 | ||||||||||||||||||
7 | -100 | -75 | ||||||||||||||||||
8 | -320 | -195 | ||||||||||||||||||
9 | -100 | -75 | ||||||||||||||||||
10 | -75 | -60 |
Dimensions of Steel Pipes ASME B36.10 and B36.19 | ||||||
Seamless and Welded Steel Pipe for Low-Temperature ASTM A333 | ||||||
1/2 inches to 2 inches | ||||||
NPS | 1/2" | 3/4" | 1" | 1¼" | 1½" | 2" |
OD | 21.3 | 26.7 | 33.4 | 42.2 | 48.3 | 60.3 |
Wall Thickness | ||||||
Sch 5 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 |
Sch 5S | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 |
Sch 10 | 2.11 | 2.11 | 2.77 | 2.77 | 2.77 | 2.77 |
Sch 10S | 2.11 | 2.11 | 2.77 | 2.77 | 2.77 | 2.77 |
Sch 20 | – | … | – | … | – | … |
Sch 30 | 2.41 | 2.41 | 2.90 | 2.97 | 3.18 | 3.18 |
STD | 2.77 | 2.87 | 3.38 | 3.56 | 3.68 | 3.91 |
Sch 40 | 2.77 | 2.87 | 3.38 | 3.56 | 3.68 | 3.91 |
Sch 40S | 2.77 | 2.87 | 3.38 | 3.56 | 3.68 | 3.91 |
Sch 60 | – | … | – | … | – | … |
XS | 3.73 | 3.91 | 4.55 | 4.85 | 5.08 | 5.54 |
Sch 80 | 3.73 | 3.91 | 4.55 | 4.85 | 5.08 | 5.54 |
Sch 80S | 3.73 | 3.91 | 4.55 | 4.85 | 5.08 | 5.54 |
Sch 100 | – | … | – | … | – | … |
Sch 120 | – | … | – | … | – | … |
Sch 140 | – | … | – | … | – | … |
XXS | 7.47 | 7.82 | 9.09 | 9.70 | 10.15 | 11.07 |
Sch 160 | 4.78 | 5.56 | 6.35 | 6.35 | 7.14 | 8.74 |
NPS = Nominal Pipe Size O.D. = Outside Diameter | ||||||
Dimensions are in millimeters unless otherwise indicated. | ||||||
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530 | ||||||
Nominal pipe size | ||||||
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm | ||||||
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm | ||||||
Wall Thickness | Length | Weight | ||||
All Diameters = – 12.5% | + 6.40 mm / – 0 mm | Weight = + 10% / – 1.5% | ||||
2 1/2 inches to 5 inches | ||||||
NPS | 2½" | 3" | 3½" | 4" | 5" | |
OD | 73 | 88.9 | 101.6 | 114.3 | 141.3 | |
Wall Thickness | ||||||
Sch 5 | 2.11 | 2.11 | 2.11 | 2.11 | 2.77 | |
Sch 5S | 2.11 | 2.11 | 2.11 | 2.11 | 2.77 | |
Sch 10 | 3.05 | 3.05 | 3.05 | 3.05 | 3.40 | |
Sch 10S | 3.05 | 3.05 | 3.05 | 3.05 | 3.40 | |
Sch 20 | … | … | ||||
Sch 30 | 4.78 | 4.78 | 4.78 | 4.78 | … | |
STD | 5.16 | 5.49 | 5.74 | 6.02 | 6.55 | |
Sch 40 | 5.16 | 5.49 | 5.74 | 6.02 | 6.55 | |
Sch 40S | 5.16 | 5.49 | 5.74 | 6.02 | 6.55 | |
Sch 60 | … | … | ||||
XS | 7.01 | 7.62 | 8.08 | 8.56 | 9.53 | |
Sch 80 | 7.01 | 7.62 | 8.08 | 8.56 | 9.53 | |
Sch 80S | 7.01 | 7.62 | 8.08 | 8.56 | 9.53 | |
Sch 100 | … | … | ||||
Sch 120 | … | 11.13 | 12.7 | |||
Sch 140 | … | … | ||||
XXS | 14.02 | 15.24 | 17.12 | 19.05 | ||
Sch 160 | 9.53 | 11.13 | 13.49 | 15.88 | ||
NPS = Nominal Pipe Size O.D. = Outside Diameter | ||||||
Dimensions are in millimeters unless otherwise indicated. | ||||||
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530 | ||||||
Nominal pipe size | ||||||
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm | ||||||
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm | ||||||
Wall Thickness | Length | Weight | ||||
All Diameters = – 12.5% | + 6.40 mm / – 0 mm | Weight = + 10% / – 1.5% | ||||
6 inches to 14 inches | ||||||
NPS | 6" | 8" | 10" | 12" | 14" | |
OD | 168.3 | 219 | 273 | 323.9 | 355.6 | |
Wall Thickness | ||||||
Sch 5 | 2.77 | 2.77 | 3.40 | 3.96 | 3.96 | |
Sch 5S | 2.77 | 2.77 | 3.40 | 3.96 | 3.96 | |
Sch 10 | 3.40 | 3.76 | 4.19 | 4.57 | 6.35 | |
Sch 10S | 3.40 | 3.76 | 4.19 | 4.57 | 4.78 | |
Sch 20 | 6.35 | 6.35 | 6.35 | 7.92 | ||
Sch 30 | 7.04 | 7.80 | 8.38 | 9.53 | ||
STD | 7.11 | 8.18 | 9.27 | 9.53 | 9.53 | |
Sch 40 | 7.11 | 8.18 | 9.27 | 10.31 | 11.13 | |
Sch 40S | 7.11 | 8.18 | 9.27 | 9.53 | 9.53 | |
Sch 60 | 10.31 | 12.70 | 14.27 | 15.06 | ||
XS | 10.97 | 12.70 | 12.70 | 12.70 | 12.70 | |
Sch 80 | 10.97 | 12.70 | 15.09 | 17.48 | 19.05 | |
Sch 80S | 10.97 | 12.70 | 12.70 | 12.70 | 12.70 | |
Sch 100 | 15.09 | 18.26 | 21.44 | 23.83 | ||
Sch 120 | 14.27 | 18.26 | 21.44 | 25.40 | 27.79 | |
Sch 140 | 20.62 | 25.40 | 28.58 | 31.75 | ||
XXS | 21.95 | 22.23 | 25.40 | 25.40 | ||
Sch 160 | 18.26 | 23.01 | 28.58 | 33.32 | 35.71 | |
NPS = Nominal Pipe Size O.D. = Outside Diameter | ||||||
Dimensions are in millimeters unless otherwise indicated. | ||||||
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530 | ||||||
Nominal pipe size | ||||||
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm | ||||||
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm | ||||||
Wall Thickness | Length | Weight | ||||
All Diameters = – 12.5% | + 6.40 mm / – 0 mm | Weight = + 10% / – 1.5% | ||||
16 inches to 24 inches | ||||||
NPS | 16" | 18" | 20" | 22" | 24" | |
OD | 406.04 | 457.2 | 508 | 558.8 | 609.6 | |
Wall Thickness | ||||||
Sch 5 | 4.19 | 4.19 | 4.78 | 4.78 | 5.54 | |
Sch 5S | 4.19 | 4.19 | 4.78 | 4.78 | 5.54 | |
Sch 10 | 6.35 | 6.35 | 6.35 | 6.35 | 6.35 | |
Sch 10S | 4.78 | 4.78 | 5.54 | 5.54 | 6.35 | |
Sch 20 | 7.92 | 7.92 | 9.53 | 9.53 | 9.53 | |
Sch 30 | 9.53 | 11.13 | 12.70 | 12.70 | 14.27 | |
STD | 9.53 | 9.53 | 9.53 | 9.53 | 9.53 | |
Sch 40 | 12.70 | 14.27 |