Project Description

ASTM A192 / A192M is the standard applicable to seamless carbon steel boiler tubes for high-pressure service

ASTM A192 seamless steel tube sizes and thicknesses usually furnished to this specification are 1⁄2 in. to 7 in. [12.7 to 177.8 mm] outside diameter and 0.085 to 1.000 in. [2.2 to 25.4 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

ASTM A192 seamless steel tubes mechanical property requirements do not apply to tubing smaller than 1⁄8 in. [3.2 mm] inside diameter or 0.015 in. [0.4 mm] thickness.

ASTM A192 Referenced Documents:

ASTM A450 / A450M Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes.

Standard: ASTM A192 / ASME SA 192

Description Name: ASME SA 192 / ASTM A192 boiler pipes; A192 pipes; A192 carbon steel tube; ASTM A192 seamless tubing; ASTM A192 carbon steel pipe; SA192 SEAMLESS PIPE; ASTM A192 cold drawn seamless steel tubes; ASTM A192 pipes and tubing; carbon steel tube; Seamless steel tube; steel tube.

Size: 1⁄2 in. to 12 in. [12.7 to 304.8 mm]

Schedule: 1.5mm-35mm

Shape: Round

Production type: Hot finished and cold finished.

Length: Single random length/ Double random length or as customer’s actual request max length is 27m.

Grade: A192 / SA192

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Heat Treatment: Hot-finished tubes need not be heat treated. Cold- finished tubes shall be heat treated after the final cold-finishing at a temperature of 1200°F [650°C] or higher.

ASTM A192 Seamless tubes Test requirement:

Chemical Compositions

Chemical Components (%)

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Mechanical Tests Required

Mechanical properties
Tensile Strength (Mpa)Yield Strength (Mpa)Elongation (%)Hardness (HRB)


ASTM A192 Seamless tubes Wall Thickness Tolerance

Seamless, Cold-Finished Tubes
Outside Diameter

In. (mm)

Wall thickness Tolerance %
Over (+)Under (-)
1 ½ (38.1) and under200
Over 1½ (38.1)220

ASTM A192 Seamless Tube Outside Diameter Tolerance

Cold-Finished Seamless Tubes
Outside Diameter

In. (mm)

Permissible Variations In. (mm)
Over (+)Under (-)
Under 1 (25.4)0.004 (0.1)0.004 (0.1)
1 to 1 ½ (25.4 to 38.1), Incl0.006 (0.15)0.006 (0.15)
Over 11⁄2 to 2 [38.1 to 50.8], Excl0.008 (0.2)0.008 (0.2)
2 to 21⁄2 [50.8 to 63.5], Excl0.010 (0.25)0.010 (0.25)
21⁄2 to 3 [63.5 to 76.2], Excl0.012 (0.3)0.012 (0.3)

ASTM A192 Seamless Tube Cut Length Tolerance

Cold-Finished Seamless Tubes
Outside Diameter,

In. (mm)

Cut Length, in. (mm)
Over (+)Under (-)
All Sizes3⁄16 [5]0 [0]
Under 2 [50.8]1⁄8 [3]0 [0]
2 [50.8] and over3⁄16 [5]0 [0]
Under 2 [50.8]1⁄8 [3]0 [0]
2 [50.8] and over3⁄16 [5]0 [0]
These permissible variations in length apply to tubes before bending. They apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m], the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser.

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ASTM A192 Seamless tubes Hydrostatic Test Pressures

Each tube shall be subjected to the hydrostatic pressure test, or instead of this test, a nondestructive test may be used when specified by the purchaser.

Hydrostatic Test Pressures
Outside Diameter of Tube, in. [mm]Hydrostatic Test Pressure, psi [MPa]
Under 1 [25.4]1000 [7]
1 to 11⁄2 [25.4 to 38.1], excl1500 [10]
11⁄2 to 2 [38.1 to 50.8], excl2000 [14]
2 to 3 [50.8 to 76.2], excl2500 [17]

ASTM A192 Seamless Tubes Flattening Test

One flattening test shall be made on specimens from each end of two tubes selected from each lot or fraction thereof.

ASTM A192 Seamless Tubes Flaring Test

One flaring test shall be made on specie- men from each end of two tubes selected from each lot or fraction thereof. These tubes shall be selected apart from those used for the flattening test.

Ordering Information

Orders for ASTM A192 Seamless carbon steel tubes should include the following, as required, to describe the desired material adequately:

  • Quantity (feet, meters, or number of lengths),
  • Name of material (seamless tubes),
  • Manufacture (hot-finished or cold-finished),
  • Size (outside diameter and minimum wall thickness),
  • Length (specific or random),
  • Optional requirements,
  • Test report required (see section on Certification of Specification A 450/A 450M),
  • Specification designation,
  • Special requirements.


  • Mill test certificates will be issued according to EN10204.3
  • The tubes Shall be Seamless, and the testing shall be as per A 450 / A450M.


Apply to the boiler and Superheater tubes for high-pressure service.

ASTM A192 Seamless Tubes Packing:

  • Packed in wooden box or bundles protected with plastic paper, and suitably protected for sea-worthily delivery or as requested.
  • The Product marking shall include the ASTM A192 or ASME SA192, size, heat no., Lot No. and Manufacture name or logo.

Photos for ASTM A192 Seamless Tubes

ASTM A192 Seamless Tubes O.D. Inspection

burstASTM A192 Seamless Tubes O.D. Inspection

ASTM A192 Seamless Tubes Thickness Inspection

ASTM A192 Seamless Tubes Thickness Inspection

ASTM A192 Seamless Tubes Packages

ASTM A192 Seamless Tubes Packages

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