STAINLESS STEEL PIPE ASTM A312

The ASTM A312/ASME SA 312 specification covers seamless and welded austenitic stainless light-weight steel pipes used for high temperature and/or corrosive service. Whilst TP304/304L and TP316/316L are the most common materials, a variety of stainless steel grades originate from different combinations of the key elements Nickel, Chrome, and Molybdenum.

Stainless Steel Pipe

STAINLESS STEEL PIPE MATERIALS

There are many grades of stainless steels pipe grades available on the market, that can be grouped into five major categories:

Austenitic Stainless Steel

These are the most common grades of stainless steel. The microstructure of austenitic stainless steels is obtained with the addition of nickel, manganese, and nitrogen that give weldability and formability properties to the alloy. The resistance to corrosion can be further improved by augmenting the percentage of chrome, moly, and nitrogen to the base alloy. Nevertheless, the basic austenitic grades are vulnerable to stress corrosion cracking (higher percentages of nickel are necessary to enhance the stress corrosion cracking). Austenitic stainless steel cannot be hardened by heat treatment but have can work hardened to high strength levels while retaining a reasonable level of strength and ductility. Even if austenitic steels are generally non-magnetic, they can show some magnetic property based on the actual alloy composition and the work hardening given during production.

Austenitic stainless steels are divided into the series 200 (chromium-manganese-nickel alloys) and 300 (chromium-nickel alloys like 304, 309, 316, 321, 347, etc).

Martensitic Stainless Steel

Martensitic stainless steels are similar to ferritic steels as they both have remarkable chromium content, however, martensitic steels have higher carbon content up to 1%. The high carbon content allows martensitic steels to be hardened and tempered as standard carbon and chrome alloy steels (but show generally low weldability and ductility). This type of stainless steel is specified in case of high strength and moderate corrosion resistance requirements. Opposite to standard austenitic stainless steels, martensitic grades are magnetic. Common martensitic grades are 410, 420 and 440C

Ferritic Stainless Steel

Ferritic stainless steels have significant chrome content but low additions on carbon (generally below 0.1%). The name of this family of stainless steels comes from the fact that their microstructure is quite similar to carbon and low alloy steels. These steels have a wide range of application, except for thin surfaces as they have low resistance to welding or applications requiring formability (ferritic steels show low formability and ductility). Ferritic stainless steels cannot be hardened by heat treatment. By adding moly to a ferritic grade, the steel can be used in highly aggressive applications as desalination plants and seawater. These steel show also remarkable resistance to stress corrosion cracking. Likewise martensitic steels, ferritic SS is magnetic. The most common ferritic grades are the 430 (17% chromium), and the 409 (11% chromium), largely used in the automotive sector.

Duplex and Super Duplex Stainless Steel

Duplex stainless steels have a microstructure which is 50% ferritic and 50% austenitic. This composition gives them a better strength than either ferritic or austenitic steels. Duplex are resistant to stress corrosion cracking. While standard duplex steels have a corrosion resistance comparable to standard austenitic steels (but show better strength and resistance to stress-corrosion-cracking), the so-called super duplex steels feature enhanced strength and resistance to any type of corrosion compared to standard austenitic steels. Duplex and super duplex stainless steels are weldable and have moderate formability. These types of stainless steels are magnetic but to a lower extent than ferritic, martensitic and precipitation hardening grades due to the 50% austenitic content. The common grades under this family are:

  • Lean duplex: UNS S32101, S32202 (UR2202), S32304, and S32003.
  • Standard duplex: UNS S31803/S32205
  • Super duplex: UNS S32760 (Zeron 100), S32750 (2507), and S32550 (Ferralium 255)
  • Hyper duplex: UNS S32707 and S33207

Precipitation hardening (PH)

PH steels can feature remarkable strength due to the addition, in the alloy, of elements as copper, niobium, and aluminum. These steels can be machined to very specific shapes with high tolerances requirements before the final aging treatment. This is different from conventional hardening and tempering of martensitic steels that are subject to distortion during the treatment. The resistance to corrosion of. precipitation hardening steels is comparable to standard austenitic steels like SS304. The most common precipitation hardening stainless steel is the 17-4PH, which features 17% chromium and 4% nickel.

Chemical Composition of Stainless Steel Pipe Grades ASTM A312 – ASME SA312

The table shows the chemical composition of the most common grades of stainless steel pipes under the ASTM A312-ASME SA312 specification:

SS Pipes Grade

 

UNS C Mn P S Si Cr Ni Mo Ti Nb N
TP304 S3040 0.08 2.0 0.045 0.030 1.0 18.0-20.0 8.0-11.0
TP304L S30403 0.035 2.0 0.045 0.030 1.0 18.0-20.0 8.0-13.0
TP304H S30409 0.04-0.10 2.0 0.045 0.030 1.0 18.0-20.0 8.0-11.0
TP304N S30451 0.08 2.0 0.045 0.030 1.0 18.0-20.0 8.0-18.0 0.10-0.16
TP304LN S30453 0.035 2.0 0.045 0.030 1.0 18.0-20.0 8.0-12.0 0.10-0.16
TP309S S30908 0.08 2.0 0.045 0.030 1.0 22.0-24.0 12.0-15.0 0.75
TP309H S30909 0.04-0.10 2.0 0.045 0.030 1.0 22.0-24.0 12.0-15.0
TP309Cb S30940 0.08 2.0 0.045 0.030 1.0 22.0-24.0 12.0-16.0 0.75 10xC min
1.10 max
TP309HCb S30941 0.04-0.10 2.0 0.045 0.030 1.0 22.0-24.0 12.0-16.0 0.75 10xC min
1.10 max
TP310S S3108 0.08 2.0 0.045 0.030 1.0 24.0-26.0 19.0-22.0 0.75
TP310H S3109 0.04-0.10 2.0 0.045 0.030 1.0 24.0-26.0 19.0-22.0
TP310Cb S31040 0.08 2.0 0.045 0.030 1.0 24.0-26.0 19.0-22.0 0.75 10xC min
1.10 max
TP310HCb S31041 0.04-0.10 2.0 0.045 0.030 1.0 24.0-26.0 19.0-22.0 0.75 10xC min
1.10 max
TP316 S3160 0.08 2.0 0.045 0.030 1.0 16.0-18.0 11.0-14.0 2.0-3.0
TP316L S31603 0.035 2.0 0.045 0.030 1.0 16.0-18.0 10.0-14.0 2.0-3.0
TP316H S31609 0.04-0.10 2.0 0.045 0.030 1.0 16.0-18.0 11.0-14.0 2.0-3.0
TP316Ti S31635 0.08 2.0 0.045 0.030 0.75 16.0-18.0 10.0-14.0 2.0-3.0 5x
(C-N)
-0.70
0.10
TP316N S31651 0.08 2.0 0.045 0.030 1.0 16.0-18.0 10.0-14.0 2.0-3.0 0.10-0.16
TP316LN S31653 0.035 2.0 0.045 0.030 1.0 16.0-18.0 11.0-14.0 2.0-3.0 0.10-0.16
TP317 S3170 0.08 2.0 0.045 0.030 1.0 18.0-20.0 10.0-14.0 3.0-4.0
TP317L S31703 0.035 2.0 0.045 0.030 1.0 18.0-20.0 11.0-15.0 3.0-4.0
TP321 S3210 0.08 2.0 0.045 0.030 1.0 17.0-19.0 9.0-12.0 0.10
TP321H S32109 0.04-0.10 2.0 0.045 0.030 1.0 17.0-19.0 9.0-12.0 0.10
TP347 S3470 0.08 2.0 0.045 0.030 1.0 17.0-19.0 9.0-13.0
TP347H S34709 0.04-0.10 2.0 0.045 0.030 1.0 17.0-19.0 9.0-13.0
TP347LN S34751 0.05-0.02 2.0 0.045 0.030 1.0 17.0-19.0 9.0-13.0 0.20-
50.0
0.06-0.10
TP348 S3480 0.08 2.0 0.045 0.030 1.0 17.0-19.0 9.0-13.0
TP348H S34809 0.04-0.10 2.0 0.045 0.030 1.0 17.0-19.0 9.0-13.0

Mechanical Properties of Stainless Steel Pipe ASTM A312 – ASME SA312

SS Pipes Grade
ASTM A312/ASME SA312
Tensile Strength
N/mm2 (min)
Yield Strength
N/mm2 (min)
Elongation
% (min)
TP304 515 205 35
TP304L 485 170 35
TP316 515 205 35
TP316L 485 170 35
TP321 OD < 17,1 mm – 515; OD < 17,1 mm – 205; 35
OD > 17,1 mm – 485 OD > 17,1 mm – 170

 

ASTM VS EUROPEAN STAINLESS STEEL PIPE MATERIALS

Stainless Steel Pipe Grades
Werkstoff/DIN EN grades ASTM grades
1.4541 X6CrNiTi18-10 A 312 Grade TP321
1.4571 X6CrNiMoTi17-12-2 A 312 Grade TP316Ti
1.4301 X5CrNi18-10 A 312 Grade TP304
1.4306 X2CrNi19-11 A 312 Grade TP304L
1.4307 X2CrNi18-9 A 312 Grade TP304L
1.4401 X5CrNiMo17-12-2 A 312 Grade TP316
1.4404 X2CrNiMo17-13-2 A 312 Grade TP316L
1.4462 X2CrNiMoN22-5-3 UNS S 31803 (Duplex)
1.4529 X1NiCrMoCuN25-20-7 UNS N 08926
1.4539 X1NiCrMoCu25-20-5 UNS N 08904 (904L)
1.4547 X1CrNiMoCuN20-18-7 UNS S 31254

 

STAINLESS STEEL PIPE DIMENSIONS ASTM A312-ASME SA312

The standard stainless steel pipes dimensions are set by the ANSI ASME B36.19 specification. Seamless SS pipes are available in the size range 1/8″ thru 24″, welded stainless pipes are manufactured in the range 2″ thru 36″ (ASTM A312, ASTM A358, i.e. electric-fusion-welded austenitic chromium-nickel stainless steel pipe, or as rolled).

ASTM A312 PIPE WALL THICKNESS (in MM)

The table shows the outside diameter and wall thickness chart for ASTM A312-ASME SA312 stainless steel pipes in mm.
Note: schedule 5S is hard to find on the market, therefore schedule 10S is recommended for pipe specifications and piping classes.

NPS OD SCH 5S SCH 10S SCH 40S SCH 80S
1/4 13.72 1.65 2.24 3.02
3/8 17.15 1.65 2.31 3.2
1/2 21.34 1.65 2.11 2.77 3.73
3/4 26.67 1.65 2.11 2.87 3.91
1 33.4 1.65 2.77 3.38 4.55
1 1/4 42.16 1.65 2.77 3.56 4.85
1 1/2 48.26 1.65 2.77 3.68 5.08
2 60.33 1.65 2.77 3.91 5.54
2 1/2 73.03 2.11 3.05 5.16 7.01
3 88.9 2.11 3.05 5.49 7.62
3 1/2 101.6 2.11 3.05 5.74 8.08
4 114.3 2.11 3.05 6.02 8.56
5 141.3 2.77 3.4 6.55 9.53
6 168.28 2.77 3.4 7.11 10.97
8 219.08 2.77 3.76 8.18 12.7
10 273.05 3.4 4.19 9.27 12.7
12 323.85 3.96 4.57 9.53 12.7
14 355.6 3.96 4.78 9.53 12.7
16 406.4 4.19 4.78 9.53 12.7
18 457.2 4.19 4.78 9.53 12.7
20 508 4.78 5.54 9.53 12.7
22 558.8 4.78 5.54
24 609.6 5.54 6.35 9.53 12.7
26 660.4
28 711.2
30 762 6.35 7.92

ASTM A312 PIPE WEIGHT (in LBS x FOOT, ASME B36.19)

NPS OD Schedule Wall Thickness Inside Diameter Weight
(Inches) (ANSI/ASME)  (Inches)  (Inches) (lbs./ft.) 
 1/8 0.405 10/10S 0.049 0.307 0.1863
Std./40/40S 0.068 0.269 0.2447
XS/80/80S 0.095 0.215 0.3145
 1/4 0.54 10/10S 0.065 0.41 0.3297
Std./40/40S 0.088 0.364 0.4248
XS/80/80S 0.119 0.302 0.5351
 3/8 0.675 10/10S 0.065 0.545 0.4235
Std./40/40S 0.091 0.493 0.5676
XS/80/80S 0.126 0.423 0.7388
 1/2 0.84 5/5S 0.065 0.71 0.5383
10/10S 0.083 0.674 0.671
Std./40/40S 0.119 0.622 0.851
XS/80/80S 0.147 0.546 1.088
160 0.188 0.466 1.309
XX 0.294 0.252 1.714
 3/4 1.05 5/5S 0.065 0.92 0.6838
10/10S 0.083 0.884 0.8572
Std./40/40S 0.113 0.824 1.131
XS/80/80S 0.154 0.742 1.474
160 0.219 0.618 1.944
XX 0.308 0.434 2.441
1 1.315 5/5S 0.065 1.185 0.8678
10/10S 0.109 1.097 1.404
Std./40/40S 0.133 1.049 1.679
XS/80/80S 0.179 0.957 2.172
160 0.25 0.815 2.844
XX 0.358 0.599 3.659
1 1/4 1.66 5/5S 0.065 1.53 1.107
10/10S 0.109 1.442 1.806
Std./40/40S 0.14 1.38 2.273
XS/80/80S 0.191 1.278 2.997
160 0.25 1.16 3.765
XX 0.382 0.896 5.214
1 1/2 1.9 5/5S 0.065 1.77 1.274
10/10S 0.109 1.682 2.085
Std./40/40S 0.145 1.61 2.718
XS/80/80S 0.2 1.5 3.631
160 0.281 1.338 4.859
XX 0.4 1.1 6.408
2 2.375 5/5S 0.065 2.245 1.604
10/10S 0.109 2.157 2.638
Std./40/40S 0.154 2.067 3.653
XS/80/80S 0.218 1.939 5.022
160 0.344 1.689 7.462
XX 0.436 1.503 9.029
2 1/2 2.875 5/5S 0.083 2.709 2.475
10/10S 0.12 2.635 3.531
Std./40/40S 0.203 2.469 5.793
XS/80/80S 0.276 2.323 7.661
160 0.375 2.125 10.01
XX 0.552 1.771 13.69
3 3.5 5/5S 0.083 3.334 3.029
10/10S 0.12 3.26 4.332
Std./40/40S 0.216 3.068 7.576
XS/80/80S 0.3 2.9 10.25
160 0.438 2.624 14.32
XX 0.6 2.3 18.58
3 1/2 4 5/5S 0.083 3.834 3.472
10/10S 0.12 3.76 4.973
Std./40/40S 0.226 3.548 9.109
XS/80/80S 0.318 3.364 12.5
XX 0.636 2.728 22.85
4 4.5 5/5S 0.083 4.334 3.915
10/10S 0.12 4.26 5.613
Std./40/40S 0.237 4.026 10.79
XS/80/80S 0.337 3.826 14.98
120 0.438 3.624 19
160 0.531 3.438 22.51
XX 0.674 3.152 27.54
4 1/2 5 Std./40/40S 0.247 4.506 12.53
XS/80/80S 0.355 4.29 17.61
XX 0.71 3.58 32.43
5 5.563 5/5S 0.109 5.345 6.349
10/10S 0.134 5.295 7.77
Std./40/40S 0.258 5.047 14.62
XS/80/80S 0.375 4.813 20.78
120 0.5 4.563 27.04
160 0.625 4.313 32.96
XX 0.75 4.063 38.55
6 6.625 5/5S 0.109 6.407 7.585
10/10S 0.134 6.357 9.289
Std./40/40S 0.28 6.065 18.97
XS/80/80S 0.432 5.761 28.57
120 0.562 5.491 36.39
160 0.719 5.189 45.35
XX 0.864 4.897 53.16
7 7.625 Std./40/40S 0.301 7.023 23.57
XS/80/80S 0.5 6.625 38.05
XX 0.875 5.875 63.08
8 8.625 5S 0.109 8.407 9.914
10/10S 0.148 8.329 13.4
20 0.25 8.125 22.36
30 0.277 8.071 24.7
Std./40/40S 0.322 7.981 28.55
60 0.406 7.813 35.64
XS/80/80S 0.5 7.625 43.39
100 0.594 7.439 50.95
120 0.719 7.189 60.71
140 0.812 7.001 67.76
XX 0.875 6.875 72.42
160 0.906 6.813 74.69
9 9.625 Std./40/40S 0.342 8.941 33.9
XS/80/80S 0.5 8.625 48.72
XX 0.875 7.875 81.77
10 10.75 5S 0.134 10.482 15.19
10S 0.165 10.42 18.7
20 0.25 10.25 28.04
30 0.307 10.136 34.24
Std./40/40S 0.365 10.02 40.48
XS/60/80S 0.5 9.75 54.74
80 0.594 9.564 64.43
100 0.719 9.314 77.03
120 0.844 9.064 89.29
140 1 8.75 104.13
160 1.125 8.5 115.64
11 11.75 Std./40/40S 0.375 11 45.55
XS/80/80S 0.5 10.75 60.07
XX 0.875 10 101.63
12 12.75 5S 0.165 12.42 22.18
10S 0.18 12.39 24.2
20 0.25 12.25 33.38
30 0.33 12.09 43.77
Std./40S 0.375 12 49.56
40 0.406 11.938 53.53
XS/80S 0.5 11.75 65.42
12 12.75 60 0.562 11.626 73.15
80 0.688 11.376 88.63
100 0.844 11.064 107.32
120 1 10.75 125.49
140 1.125 10.5 139.67
160 1.312 10.126 160.27
14 14 10S 0.188 13.624 27.73
10 0.25 13.5 36.71
20 0.312 13.376 45.61
Std./30/40S 0.375 13.25 54.57
40 0.438 13.124 63.44
XS/80S 0.5 13 72.09
60 0.594 12.814 85.05
80 0.75 12.15 106.13
100 0.938 12.126 130.85
120 1.094 11.814 150.9
140 1.25 11.5 170.21
160 1.406 11.188 189.1
16 16 10S 0.188 15.624 31.75
10 0.25 15.5 42.05
20 0.312 15.376 52.27
Std./30/40S 0.375 15.25 62.58
XS/40/80S 0.5 15 82.77
60 0.656 14.688 107.5
80 0.844 14.314 136.61
100 1.031 13.938 164.82
120 1.219 13.564 192.43
140 1.438 13.124 223.64
160 1.594 12.814 245.25
18 18 10S 0.188 17.624 35.76
10 0.25 17.5 47.39
20 0.312 17.376 58.94
Std./40S 0.375 17.25 70.59
30 0.438 17.124 82.15
XS/80S 0.5 17 93.45
40 0.562 16.876 104.67
60 0.75 16.5 138.17
80 0.938 16.126 170.92
100 1.156 15.688 207.96
120 1.375 15.25 244.14
140 1.562 14.876 274.22
160 1.781 14.438 308.5
20 20 10 0.25 19.5 52.73
20 0.375 19.25 78.6
30 0.5 19 104.13
40 5.94 18.814 123.11
60 8.12 18.376 166.4
80 1.031 17.938 208.87
100 1.281 17.438 256.1
120 1.5 17 296.37
140 1.75 16.5 341.09
160 1.969 16.064 379.17
22 22 10/10S 0.25 21.5 58.07
Std./20/40S 0.375 21.25 86.61
XS/30/80S 0.5 21 114.81
60 0.875 20.25 197.41
80 1.125 19.75 250.81
100 1.375 19.25 302.88
120 1.625 18.75 353.61
140 1.875 18.25 403
160 2.125 17.75 451.06
24 24 10/10S 0.25 23.5 63.41
Std./20/40S 0.375 23.25 94.62
XS/80S 0.5 23 125.49
30 0.562 22.876 140.68
40 0.688 22.626 171.29
60 0.969 22.064 238.35
80 1.219 21.564 296.58
100 1.531 20.938 367.39
120 1.812 20.376 429.39
140 2.062 19.876 483.1
160 2.344 19.314 542.13
26 26 10 0.312 25.376 85.6
Std./40S 0.375 25.25 102.63
XS/80S 0.5 25 136.17
28 28 10 0.312 27.376 92.26
Std./40S 0.375 27.25 110.64
20/80S 0.5 27 146.25
30 0.625 26.75 182.73
30 30 10 0.312 29.376 98.93
Std./40S 0.375 29.25 118.65
XS/20/80S 0.5 29 157.53
30 0.625 28.75 196.08
32 32 10 0.312 31.376 105.59
Std. 0.375 31.25 126.66
20 0.5 31 168.21
30 0.625 30.75 109.43
40 0.688 30.624 230.08
34 34 10 0.312 33.376 112.25
Std. 0.375 33.25 134.67
20 0.5 33 178.89
30 0.625 32.75 222.78
40 0.688 32.624 244.77
36 36 10 0.312 35.375 118.92
Std./40S 0.375 35.25 142.68
XS/80S 0.5 35 189.57

WEIGHT (in KG x METER) ASTM A312 PIPE (ASME B36.19)

Nominal Pipe Size Outside Diameter Stainless Steel Pipes Dimensions
Schedule 5S Schedule 10S Schedule 40S Schedule 80S
(mm) (inch) WT / WEIGHT
mm (in) kg/m mm (in) kg/m mm (in) kg/m mm (in) kg/m
1/8 10.3 0.405 1.25 (0.049) 0.28 1.73 (0.068) 0.37 2.42 (0.095) 0.47
1/4 13.7 0.540 1.66 (0.065) 0.49 2.24 (0.088) 0.63 3.03 (0.119) 0.80
3/8 17.2 0.675 1.66 (0.065) 0.63 2.32 (0.091) 0.85 3.20 (0.126) 1.10
1/2 21.3 0.840 1.65 (0.065) 0.81 2.11 (0.083) 1.00 2.77 (0.109) 1.27 3.74 (0.147) 1.62
3/4 26.7 1.050 1.65 (0.065) 1.02 2.11 (0.083) 1.28 2.87 (0.113) 1.68 3.92 (0.154) 2.20
1 33.4 1.315 1.65 (0.065) 1.30 2.77 (0.109) 2.09 3.38 (0.133) 2.50 4.55(0.179) 3.24
1 1/4 42.2 1.660 1.65 (0.065) 1.66 2.77 (0.109) 2.69 3.56 (0.140) 3.39 4.86 (0.191) 4.47
1 1/2 48.3 1.900 1.65 (0.065) 1.91 2.77 (0.109) 3.11 3.69 (0.145) 4.06 5.08 (0.200) 5.41
2 60.3 2.375 1.65 (0.065) 2.40 2.77 (0.109) 3.93 3.92 (0.154) 5.45 5.54 (0.218) 7.49
2 1/2 73.0 2.875 2.11 (0.083) 3.69 3.05 (0.120) 5.26 5.16 (0.203) 8.64 7.01 (0.276) 11.4
3 88.9 3.500 2.11 (0.083) 4.52 3.05 (0.120) 6.46 5.49 (0.216) 11.3 7.62 (0.300) 15.3
3 1/2 101.6 4.000 2.11 (0.083) 5.18 3.05 (0.120) 7.41 5.74 (0.226) 13.6 8.08 (0.318) 18.6
4 114.3 4.500 2.11 (0.083) 5.84 3.05 (0.120) 8.37 6.02 (0.237) 16.1 8.56 (0.337) 22.3
5 141.3 5.563 2.77 (0.109) 9.46 3.41 (0.134) 11.6 6.56 (0.258) 21.8 9.53 (0.375) 31.0
6 168.3 6.625 2.77 (0.109) 11.3 3.41 (0.134) 13.9 7.12 (0.280) 28.3 10.9 (0.432) 42.6
8 219.1 8.625 2.77 (0.109) 14.8 3.76 (0.148) 20.0 8.18 (0.322) 42.5 12.7 (0.500) 64.6
10 273.1 10.750 3.41 (0.134) 22.7 4.20 (0.165) 27.8 9.28 (0.365) 60.4 12.7 (0.500) 81.5
12 323.9 12.750 3.97 (0.156) 31.3 4.58 (0.180) 36.1 9.53 (0.375) 73.9 12.7 (0.500) 97.4

 

STAINLESS STEEL PIPE TOLERANCES (ASTM A312 – ASME SA312)

DIAMETER TOLERANCE OF STAINLESS STEEL PIPE

NPS ASTM A312/ASME SA312 OD Tolerance
+
inch mm inch mm
1/8 to 1 1 /2
> 1 1 /2 to 4
> 4 to 8
> 8 to 18
> 18 to 26
> 26 to 34
> 34 to 48
1/64(0.015)
1/32(0.031)
1/16(0.062)
3/32(0.093)
1/8(0.125)
5/32(0.156)
3/16(0.187)
0.4
0.8
1.6
2.4
3.2
4.0
4.8
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
0.8
0.8
0.8
0.8
0.8
0.8
0.8

WALL THICKNESS TOLERANCE OF STAINLESS STEEL PIPE

The nominal wall thickness tolerance is +/- 12.5%.

NPS ASTM A312/ASME SA312 WT Tolerance, %
+
1/8-2 1 /2 20.0 12.5
3~18, t/D≤ 5% 22.5 12.5
3~18, t/D> 5% 15.0 12.5
≥ 20, welded 17.5 12.5
≥ 20, seamless, t/D≤ 5% 22.5 12.5
≥ 20, seamless, t/D> 5% 15.0 12.5

 

STAINLESS STEEL PIPE FINISHING AND TESTING

Polishing Manufacturers can polish any stainless steel pipe item to a #4 polish, #6 Polish, #7 polish or a #8 mirror finish.
Cuttings Stainless steel pipes can be produced in standard lengths or cut to size (standard lengths are 20′ and 40′ depending on the nominal pipe size).
Beveling Manufacturers can bevel the edges of stainless steel pipes to prepare them for welding.
Threading Stainless steel pipes can be supplied, besides plain and beveled ends, also with threaded ends (generally for NPS below 2 inches)
Pipe Honing & Turning Manufacturers can hone SS pipe and tube, using precision abrasion tools and obtain any desired finish or dimensional tolerance.
Heat treating & Annealing Most stainless steel pipes grades can be heat treated to modify their mechanical properties.
Positive Material Identification (PMI) Manufacturers can perform PMI testing to ascertain the actual content of Nickel, Chrome, and Moly in the pipe.
UT Testing In some cases, UT testing of the stainless steel plates may be required.

 

STAINLESS STEEL PIPE PRICES

Looking for the price of stainless steel pipes? Click on the image and check our online SS pipe price estimation tool!

Stainless Steel Pipe Price Estimate

The tool estimates the price for stainless steel  pipes manufactured in Europe and Asia, for example:

What is a schedule 40S SS steel pipe price (6 inches, ASTM A312 TP304)?

Even if our price estimates are reliable, prices shall always be double checked with stainless steel pipe manufacturers and distributors.

 

BUY AND SELL STAINLESS STEEL PIPES ONLINE!


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