ASTM A 106 Seamless Pipe

Scope

Covers seamless carbon steel Grades A & B 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.

Heat Treatment

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 & Nondestructive Electric Testing

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.

End Finish Plain End:

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 U16” 土 1/32”.

Threaded Pipe:

Threads comply with ANSI Standard B 1.20.1

Couplings:

Couplings comply with ASTM Standard A 865 Available Coatings

ASTM A 106 seamless pipe is available in four different coatings:

• Exclusive Blue Diamond® Coating

• Hot-Dipped Galvanized

• Pickled and Oiled

• Bare

Chemical Requirements Composition, % Max

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

Bending Test (Cold) For NPS 2 and under

Degree Diameter of Mandrel

Of Bend

Standard 90° 12 X pipe O.D.

Close Coiling 180° 8 X pipe O.D.

Frequency of Tests

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

Dimensions and Weights

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

NPS 1-1/2 and under    ±1/64”

NPS 2    ±1/32”

Permissible Variations in Weight per Foot

Pipe shall not vary more than 10% over and 3.5% under the standard specified.

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).

When galvanized pipe is bent or otherwise fabricated to a degree that causes the zinc coating to stretch or compress beyond the limit of elasticity, some flaking of the coating may occur.

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