What is ASTM A106 Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service

Covers seamless carbon Grades A & B steel pipe for high pressure and high temperature service. Pipe is suitable for bending, flanging, and similar forming operations and for welding. Applications include: Refineries, Power Plants, Boilers, Ship Building, and other specialized applications.

Hot-finished pipe need not be heat treated. Cold-drawn pipe shall be heat treated after the final cold draw pass at a temperature of 1200°F or higher.

Hydrostatic inspection test pressure is 2500 psi for sizes NPS 2 and under. Test pressure shall be maintained for a minimum of 5 seconds. When specified by the purchaser, pipe may be tested by the nondestructive electric test in lieu of the hydrostatic test.

NPS 1-1/2 and smaller shall be either plain end square cut or plain end beveled at the option of the manufacturer. NPS 2 ends shall be beveled to angle 30° +5°, -0° with a root face of 1/16” ± 1/32”.

CarbonA Manganese Phosphorus Sulfur .25 0.27/0.93 .035 .035
Silicon CopperB NickelB ChromiumB
0.10 Min .40 .40 .15
MolybdenumB VanadiumB .15 .08
AFor each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%
BThe combination of these five elements shall not exceed 1.00%
Tensile Requirements
Yield Strength, min 35,000 psi
Tensile Strength, min 60,000 psi
Elongation in 2” 35% Minimum

Degree Diameter of Mandrel
Of Bend Standard 90° 12 X pipe O.D. Close Coiling 180° 8 X pipe O.D.

Tensile tests and flattening tests are required on one length of pipe from each lot of 400 lengths or fraction thereof for each size.

The dimensions and weights furnished under this specification are in agreement with the standardized dimensions and weights specified in ANSI B 36.10.
Plain End Dimensions Schedules 40 & 80

Permissible Variations in Wall Thickness

Minimum wall thickness at any point shall not be more than 12.5% under nominal wall thickness specified. Maximum wall thickness at any point shall not be greater than 20.0% over nominal wall thickness.

Workmanship

Visual imperfections such as scabs, seams, laps or tears shall not exceed 5% of the nominal wall thickness.

Permissible Variations in Outside Diameter

Permissible Variations in Weight per Foot

Product Marking

Each length of pipe is continuously stenciled to show the manufacturer, specification (A106), size (O.D. & wall), “A & B” for Grades A & B, 2500 psi, length and heat number
Manufacturing Location
All product furnished by Wheatland Tube Company and Sharon Tube Company are manufactured by Sharon Tube in Sharon, PA, USA.

Hot-Dipped Galvanized

Pipe is galvanized to the requirements of ASTM A 53. The average weight of zinc coating shall not be less than 1.8 ounces per square foot of surface (inside and outside).

ASTM A106
Seamless carbon steel pipes for high-temperature service
Application:	For high temperature service
Size(mm):	O.D.: 6.0～323.0 W.T.: 1～30 L: max 12000

Grade and Chemical Composition (％)

Grade	C≤	Mn	P≤	S≤	Si≥	Cr≤	Cu≤	Mo≤	Ni≤	V≤
A	0.25	0.27-0.93	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
B	0.30	0.29-1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
C	0.35	0.29-1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08

Mechanical Properties：

Grade	Rm Mpa Tensile Strength	Mpa Yield Point	A％ Elongation	Delivery Condition
A	≥330	≥205	20	Annealed
B	≥415	≥240	20	Annealed
C	≥485	≥275	20	Annealed

Dimension Tolerances：

Pipe Type	Pipe Sizes		Tolerances
Cold Drawn	OD	≤48.3mm	±0.40mm
	OD	≥60.3mm	±1％mm
	WT		±12.5％

ASTM A106 Carbon Steel Pipe High-Temperature Service