Standards

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ASTM SPECIFICATION FOR STAINLESS STEEL TUBES / PIPES

Specification Allowable Outside Diameters Variations in mm Allowable wall thickness variations in % Exact Length tolerances in mm Tests
ASTM A-213
Seamless Boiler, Super heater, and Heat Exchanger tubes
Diameters Over Under
upto 25.4 0.10 0.10
25.4 to 38.1 incl. 0.15 0.15
38.1 to 50.8 excl. 0.20 0.20
50.8 to 63.5 excl. 0.25 0.25
63.5 to 76.2 excl. 0.30 0.30
76.2 to 101.6 incl. 0.38 0.38
Over Under
+20 -0
+20 -0
+22 -0
+22 -0
+22 -0
+22 -0
Over Under
3.17 0
3.17 0
3.17 0
3.76 0
4.76 0
4.76 0
Tension Test
Flattening Test
Flare Test
Hardness Test
100% Hydrostatic TestRefer to ASTM A-450

ASTM A-249
Welded Boiler
Super heater
Heat Exchanger
and
Condenser Tubes
upto 25.4 0.10 0.10
25.4 to 38.1 incl. 0.15 0.15
38.1 to 50.8 excl. 0.20 0.20
50.8 to 63.5 excl. 0.25 0.25
63.5 to 76.2 excl. 0.30 0.30
76.2 to 101.6 incl. 0.38 0.38
+10 -10
+10 -10
+10 -10
+10 -10
+10 -10
+10 -10
Minimum Wall
+ 18%- 0 available
on request.
3.17 0
3.17 0
3.17 0
4.76 0
4.76 0
4.76 0
Tension Test
Flattening Test
Flange Test
Reverse Bend Test
Hardness Test
100% Hydrostatic Test
Reverse Flattening TestRefer to ASTM A-450
When ever Applicable

ASTM A-269
Seamless & Welded TubesGeneral Services
upto 12.7 0.13 0.13
12.7 to 38.1 excl. 0.13 0.13
38.1 to 88.9 excl. 0.25 0.25
88.9 to 139.7 excl. 0.38 0.38
+15 -15
+10 -10
+10 -10
+10 -10
3.2 0
3.2 0
4.8 0
4.8 0
Flare Test
(Seamless Only)
Flange Test
(Welded Only)
Reverse Flattening Test
(Welded Only)
Hardness Test
100% Hydrostatic Test
ASTM A-270
Seamless and WeldedAustenitic StainlessSteel Sanitary Tubing
25.4 0.05 0.20
38.1 0.05 0.20
50.8 0.05 0.28
63.5 0.05 0.28
76.2 0.08 0.30
101.6 0.08 0.38
+12.5 -12.5
+12.5 -12.5
+12.5 -12.5
+12.5 -12.5
+12.5 -12.5
+12.5 -12.5
3.2 0
3.2 0
3.2 0
3.2 0
3.2 0
3.2 0
Reverse Flattening test
100% Hydrostatic Test
External Polish on all
tubesRefer to ASTM A-270
ASTM A-312
Seamless & Welded pipes
13.7 to 48.3 incl. 0.40 0.79
48.3 to 114.3 incl. 0.79 0.79
114.3 to 220 incl. 1.60 0.79
Minimum Wall
12.5% under normal Wall Specified.
6.4 0
6.4 0
6.4 0
(Normally Random Lengths Ordered)
Tension Test

Flattening Test

100% Hydrostatic Test

Refer to ASTM A-530

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Equivalent table For Various Specifications

USA
AISI NO		 GERMANY
DIN		 INDIA
IS		 BRITAIN BS JAPAN
JIS		 SWEDEN SIS FRANCE AFNOR ITALY
UNI		 CHINA
GB		 UNS DESIGNATION
304 1.4301 X04Cr19Ni9 304S15 SUS304 14 23 23 Z6CN18.09 X5CrNi18 10 0Cr19Ni9 S30400
304 L 1.4306 X02Cr19Ni10 304S11 SUS304L 14 23 52 Z2CN18.10 X2CrNi18 11 00Cr19Ni11 S30403
310 1.4845 X20Cr25Ni20 310S24 SUS310S 14 23 61 Z12CN25.20 X22CrNi25 20 0Cr25Ni20 S31008
316 1.4401 X04Cr17Ni12Mo2 316S31 SUS316 14 23 47 Z6CND17.11 X8CrNiMo 1713 0Cr17Ni12Mo2 S31600
316 L 1.4404 X02Cr17Ni12Mo2 316S11 SUS316L 14 23 48 Z2CND17.12 X2CrNiMo 1712 00Cr17Ni14Mo2 S31603
321 1.4541 X04Cr18Ni10Ti 316S31 SUS321 14 23 37 Z6CNT18.12 X6CrNiTi 18 11 OCr18Ni9Ti S32100

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