STAINLESS ASTM/ASME SPECIFICATIONS

A269 Welded and Seamless
General Service

Size
Inches
Tolerances, Inches
OD,
Inches
Wall
Ovality
2 x Tol., In.
Cut Length
(b), In.
Less than 1/2
±0.005
±15%
——
+1/8
–0
Over 1/2 to 1-1/2
±0.005
±10%
–0.065
Over 1-1/2 to 3-1/2
±0.010
±10%
–0.095
+3/16
–0
Over 3-1/2 to 5-1/2
±0.015
±10%
–0.150
Over 5-1/2 to 8
±0.030
±10%
——

(b) For cut lengths 24 feet or less. Over 24 feet add 1/8 inch per 10 feet to 1/2 inch maximum tolerance. Tubes not heat-treated to be stencilled: “HT-O”
Tests per ASTM A269 and A450*

  • Flare for seamless tubes
  • Flange for welded tubes
  • Reverse flatten for welded tubes
  • Hardness: Rockwell B90 or BHN 200 maximum
  • Hydrotest: At 1000 to 4500 psi depending on diameter provided stress does not exceed 26,000 or 24,000 psi maximum if ordered per P=2St/D.
  • Alternate: Non-destructive electrical test permitted unless order specifies which test to be used. Test to A450.
  • For details, refer to A450 specification.

STAINLESS STEEL PIPE
ASTM A312/ASME SA312

Permissible Variations in Outside Diameter

NPS Designator
Inches
Permissible Variations in Outside Diameter
Over
In.
Under
In.
1/8 to 1-1/2 incl
1/64 (0.015)
1/32 (0.031)
Over 1-1/2 to 4 incl
1/32 (0.031)
1/32 (0.031)
Over 4 to 8 incl
1/16 (0.062)
1/32 (0.031)
Over 8 to 18 incl
3/32 (0.093)
1/32 (0.031)
Over 18 to 26 incl
1/8 (0.125)
1/32 (0.031)
Over 26 to 34 incl
5/32 (0.156)
1/32 (0.031)
Over 34 to 48 incl
3/16 (0.187)
1/32 (0.031)

NOTE:
The above tolerances on outside diameter include ovality except for thin-wall pipe. Thin-wall pipe usually develops significant ovality (out-of-roundness) during final annealing, straightening, or both. Thin-wall pipe is defined as having a wall thickness of 3 percent or less of the outside diameter. The above diameter tolerances are not sufficient to provide for additional ovality except in thin-wall pipe and are applicable only to the mean of the extreme (maximum and minimum) outside diameter readings in any one cross-section. However, for thin-wall pipe the difference in extreme outside diameter readings (ovality) in any one cross-section shall not exceed 1.5 percent of the specified outside diameter.

Permissible Variations in Wall Thickness
Seamless and welded (no filler metal added).
The minimum wall thickness at any point shall not be more than 12.5 percent under the nominal wall thickness specified.

STAINLESS STEEL PIPE
ASTM A312/ASME SA312

Tensile Requirements

Grade
UNS
Designation
Tensile
Strength
min ksi
(MPa)
Yield
Strength
min ksi
(MPa)
TP304L
S30403
70 (485)
25 (170)
TP316L
S31603
70 (485)
25 (170)
TP304
S30400
75 (515)
30 (205)
TP304H
S30409
75 (515)
30 (205)
TP309
S30900
75 (515)
30 (205)
TP309Cb
S30940
75 (515)
30 (205)
TP309S
S30908
75 (515)
30 (205)
TP310
S31000
75 (515)
30 (205)
TP310Cb
S31040
75 (515)
30 (205)
TP310S
S31008
75 (515)
30 (205)
TP316
S31600
75 (515)
30 (205)
TP316H
S31609
75 (515)
30 (205)
TP317
S31700
75 (515)
30 (205)
TP317L
S31703
75 (515)
30 (205)
TP321
S32100
75 (515)
30 (205)
TP321H
S32109
75 (515)
30 (205)
TP347
S34700
75 (515)
30 (205)
TP347H
S34709
75 (515)
30 (205)
TP348
S34800
75 (515)
30 (205)
TP348H
S34809
75 (515)
30 (205)
TPXM-10
S21900
90 (620)
50 (345)
TPXM-11
S21903
90 (620)
50 (345)
TPXM-15
S38100
75 (515)
30 (205)
TPXM-29
S24000
100 (690)
55 (380)
TPXM-19
S20910
100 (690)
55 (380)
TP304N
S30451
80 (550)
35 (240)
TP316N
S31651
80 (550)
35 (240)
TP304LN
S30453
75 (515)
30 (205)
TP316LN
S31653
75 (515)
30 (205)
—
S31254
94 (650)
44 (300)
—
S30815
87 (600)
45 (310)
—
S01815
78 (540)
35 (240)
—
S31725
75 (515)
30 (205)
—
S31726
80 (550)
35 (240)
 
Longitudinal
Transverse
Elongation in 2 in. or 50 mm (or 4D), min., %:
35
25

STAINLESS STEEL SPECIFICATIONS
ASTM A312

Theoretical Bursting and Collapsing Pressures for Pipe

Nominal
Size
Inches
Schedule
Number
Outside
Diameter
Inches
Wall
Thickness
Inches
Inside
Diameter
Inches
Internal
Pressure
PSI
Bursting
External
Pressure
PSI
Collapsing
1/8
10
0.405
0.049
0.307
18,150
7,468
40
0.405
0.068
0.269
25,195
10,761
80
0.405
0.095
0.215
35,185
15,441
1/4
10
0.540
0.065
0.410
18,055
7,425
40
0.540
0.088
0.364
24,444
10,415
80
0.540
0.119
0.302
33,055
14,445
3/8
10
0.678
0.065
0.545
14,380
5,705
40
0.678
0.091
0.493
20,132
8,397
80
0.678
0.126
0.423
27,876
12,021
1/2
 5
0.840
0.065
0.710
11,607
4,407
10
0.840
0.083
0.674
14,821
5,911
40
0.840
0.109
0.622
19,464
8,084
80
0.840
0.147
0.546
26,250
11,260
3/4
 5
1.050
0.065
0.920
9,285
3,295
10
1.050
0.083
0.884
11,857
4,524
40
1.050
0.113
0.824
16,142
6,529
80
1.050
0.154
0.742
22,000
9,271
1
 5
1.315
0.065
1.185
7,414
2,445
10
1.315
0.109
1.097
12,433
3,795
40
1.315
0.133
1.049
15,171
6,075
80
1.315
0.179
0.957
20,418
8,530
1-1/4
 5
1.660
0.065
1.530
5,873
1,725
10
1.660
0.109
1.442
9,849
3,585
40
1.660
0.140
1.380
12,650
3,895
80
1.660
0.191
1.278
17,259
7,052
1-1/2
 5
1.900
0.065
1.770
5,131
1,376
10
1.900
0.109
1.682
8,605
3,002
40
1.900
0.145
1.610
11,447
4,332
80
1.900
0.200
1.500
15,789
6,364
2
 5
2.375
0.065
2.245
4,105
896
10
2.375
0.109
2.157
6,884
2,196
40
2.375
0.154
2.067
9,726
3,526
80
2.375
0.218
1.939
13,768
5,418
2-1/2
 5
2.875
0.083
2.709
4,330
1,001
10
2.875
0.120
2.635
6,260
1,905
40
2.875
0.203
2.469
10,591
3,931
3
 5
3.500
0.083
3.334
3,557
639
10
3.500
0.120
3.260
5,142
1,375
40
3.500
0.216
3.068
9,257
3,307
3-1/2
 5
4.000
0.083
3.834
3,112
431
10
4.000
0.120
3.760
4,500
1,081
4
 5
4.500
0.083
4.334
2,766
315
10
4.500
0.120
4.260
4,000
845
40
4.500
0.237
5.345
7,900
2,672
5
 5
5.563
0.109
5.295
2,949
350
10
5.563
0.134
6.407
3,613
665
6
 5
6.625
0.109
6.357
2,467
129
10
6.625
0.134
3,033
394
NOTE: To compute safe working pressures, above burst pressures should be divided by your desired safety factor.