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Tolerances, seameless tubes
Tolerances according to ISO R 1127

Type Tolerance on O.D wall thickness
cold-worked Tube 0.75% but min 0.30 mm (D3) 10% (T3)
Tolerances according to ASTM A213/A450

Tolerance on O.D

wall thickness

0.254 mm

+205  -0%

Tolerances according to ASTM A269
Nominal Tolerance on

wall thickness

outside diameter O.D
mm mm
<31.75 0.13 10%

For mechanical properties at 20˚c refer to page 5, Information concering mechanical properties at high temperatures,physical properties, corrosion resistance, fabrication guidelines etc. is given in the relevant data sheets.

Tolerances, welded tubes
Tolerances according to ISO R 1127

Nominal
outside diameter
mm
Tolerance on
O.D
Wall thickness
16-51 0.50% but
min 0.15mm2)
5% (T5)

1)The wall thickness is not measured over the weld bead. In the weld joint area the minus, but not the plus tolerances, are inculded. In those cases where the tolerance is to include the bead, it will be necessary to agree the acceptable limits
2)ISO standard is min 0.10 mm.

Tolerance classess according to ISO
(Seamless and weided tubes) :
Outside diameter wall thickness
D1: 1.5% but minimum 0.75 mm T1: 15%
D2: 1.0% but minimum 0.50 mm T2: 12.5%
D3: 0.75% but minimum 0.30 mm T4: 7.5%
D4: 0.50% but minimum 0.10mm T5: 5%
Catalogue code : TST-S (seamless)
TST-W (welded)
Ordering example : TST-S-3R12-16-1
               

Tolerances, seameless pipes
Tolerances according to ASTM A312/A530 for pipes of all grades except SANDVIK Sanicro 31

Nominal
outside diameter
mm
Tolerance on
O.D.
mm.
wall thickness
13.72-48.26
60.33-114.3
141.3-219.08
+0.4/-0.79
+0.79/-0.79
+1.59/0.79
-12.5%
-12.5%
-12-5%
* The standard gives tolerances based on the nominal metreweight.
Tolerances according to ASTM B407 for pipes of SANDVIK Sanicro 31.
Nominal
Outside diameter
mm
Tolerance on
O.D
mm
wall thickness
17.15-3304 0.19 10%
42.16-88.9 0.25   10%

For mechanical properties at 20˚c refer to page 5. Information concerning mechanical properties at high temperatures, physicalproperties, corrosion resistance, fabrication guidelines etc. is given in the relevant data sheetws.

     

Tolerances, welded pipes
Tolerances according to ASTM A312/A530 (not fabricated pipe)

Nominal
outside diameter
mm
Tolerance on
O.D
wall thickness
10.29-48.26
60.33-88.9
+ 0.4/-0.79
+ 0.79/0.79
- 12.5%
-12.5%
Tolerance according to ANSI B16.9 for fabricated pipe
Nominal
outside diameter
mm
Tolerance on
O.D at ends
mm
walln thickness
101.6-114.3
168.28-219.08
273.05-323.85
1.58
+ 2.38/-0.79
+ 3.96/-3.17
- 12.5%
-12.5%
-12.5%
*The standard gives tolerances based on the nominal metre weight.
Catalogue code:

TST-S (seamless, cold-worked)
TST-E (seamless, extruded)
TST-W( W

Ordering example:

TST-SNC 31-3/8-SCH 40
TST-E-3R12-1-SCH 40