ASME SA192 Seamless Bending Tubes for boilers

ASTM A192 / A192M, ASME SA192 / SA192M is the standard applicable to Seamless carbon steel boiler tubes for High-pressure service.

ASTM A192 / ASME SA192 Standard covers minimum-wall thickness, seamless carbon steel boiler and superheater tubes for high- pressure service.

ASTM A192 / ASME SA192 Tubes 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 / ASME SA192 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 / ASME SA192 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, SA192 bending tubes.

ASME SA192 Seamless Bending Tubes

ASME SA192 Seamless Bending Tubes

Click the details of ASME SA192 Seamless Bending Tubes.

Size: 1⁄2 in. to 7 in. [12.7 to 177.8 mm]

Schedule: 1.5mm-35mm

Shape: Round

Production type: Hot finished and cold finished, Cold bending and hot bending.

Length: According to Customer

Grade: A192 / SA192

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.

Bending drawing

SA192 R20 Bending tube

SA192 R40 Bending tube

SA192 R80 R20 Bending tube

SA192 Bending tube beveled end

Test requirements:

ASTM A192 / ASME SA192 Tube Chemical Compositions

Chemical Components (%)
C Si Mn P S Mo Cr V
0.06-0.18 ≤0.25 0.27-0.63 ≤0.035 ≤0.035 / / /

ASTM A192 / ASME SA192 Tube Mechanical Tests Required

Mechanical properties
Strength (Mpa)
Strength (Mpa)
≥325 ≥180 ≥35 ≤77

ASTM A192 / ASME SA192 Tube Wall Thickness Tolerance

Seamless, Cold-Finished Tubes
Outside Diameter
In. (mm)
Wall thickness Tolerance %
Over (+) Under (-)
1 ½ (38.1)
and under
20 0
Over 1½ (38.1) 22 0

ASTM A192 / ASME SA192 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), Incl 0.006 (0.15) 0.006 (0.15)
Over 11⁄2 to 2 [38.1 to 50.8], Excl 0.008 (0.2) 0.008 (0.2)
2 to 21⁄2 [50.8 to 63.5], Excl 0.010 (0.25) 0.010 (0.25)
21⁄2 to 3 [63.5 to 76.2], Excl 0.012 (0.3) 0.012 (0.3)

ASTM A192 / ASME SA192 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 / ASME SA192 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 / ASME SA192 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.
  • Application: apply to the boiler and Superheater tubes for high-pressure service.