Stainless Steel Pipe Data

Seamless & Welded Standard Pipe Tolerances

Nominal Pipe Size Inches Outside Diameter Tolerances
A312 Seamless A312 Welded A376 Seamless
Plus Minus Plus Minus Plus Minus
1/8 IPS to 11/2 IPS incl. .015î .031î .015î .031î .015î .031î
2 IPS to 4 IPS incl. .031î .031î .031î .031î .031î .031î
5 IPS to 8 IPS incl. .062î .031î .062î .031î .062î .031î
10 IPS to 12 IPS incl. .093î .031î .093î .031î .093î .031î
Wall Tolerances By Wt. 12.5% By Wt. 12.5% By Wt. 12.5%
Weight Tolerances 10.0% 3.5% 10.0% 3.5% 10.0% 3.5%

Welded A409 Light Wall Pipe Tolerances

Nominal Pipe Size Inches O.D. Tolerances Wall Tolerances Ovality Tolerances
O.D. Wall Plus Minus Plus Minus Plus Minus
14 to 30 Under .188 .20% .20% * .018î 1.5% 1.5%
14 to 30 188 & Over .40% .40% * .018î 1.5% 1.5%
*Wall plus tolerance determined by A480 sheet thickness tolerances

Welded A358 Heavy Plate Pipe Tolerances

Nominal Pipe Size Inches O.D. Tolerances Wall Tolerances Ovality Tolerances
Plus Minus Plus Minus Plus Minus
8 IPS and Larger 0.5% .05% * .010î 1.0% 1.0%
*Wall plus tolerance determined by A240 plate thickness tolerances.

Pipe Description

Specification Summary
ASTM-A-312 Seamless or Welded Without Filler Metal
ASTM-A-358 Fusion Welded from Plate With Filler Metal
ASTM-A-376 Seamless for High Temperature Service
ASTM-A-409 Welded Light Wall Pipe, Filler Metal Optional

Typical Properties

Material Designation Tensile Strength Minimum Yield Strength Minimum Elongation in 2 Inches Minimum
Standard ì300î Series 75,000 psi 30,000 psi 35%
ì300î Series ìLî Grades 70,000 psi 25,000 psi 35%
ì300î Series ìHî Grades 75,000 psi 30,000 psi 35%

The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes.

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