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ASTM A-252
SPECIFICATIONS

STANDARD
SPECIFICATION

ASTM A-252-XX (XX= Represents year of last revision)
FOUNDATION STEEL PIPE PILES

SCOPE

This specification covers nominal thickness of the wall steel pipe piles of cylindrical shape and applies to pipe piles in which the steel cylinder acts as a permanent load-carrying member, or as a shell to form cast-in-place concrete piles.

STEEL FABRICATION PROCESS

The steel shall be made by one or more of the following processes : Martin/Bessemer furnace (open-hearth), basic-oxygen or electric furnace.

STEEL CHEMICAL COMPOSITION

The steel shall conform to the following requirements as to chemical composition:

Seamless and welded pipe : Martin furnace, basic-oxygen or electric furnace:

Phosphorus, maximum (%) : 0.050

MECHANICAL PROPERTIES

                                                                   GRADE 1                    GRADE 2                    GRADE 3

Yield strength, min. psi (MPa) :           30,000 (205)                 35,000 (240)                45,000 (310)

Tensil strength, min. psi (MPa):          50,000 (345)                 60,000 (414)                66,000 (455)

Elongation in 2 in., min. % :                      30%                               25%                              20%

PERMISSABLE VARIATIONS IN WEIGHTS AND DIMENSIONS

Weight

The weight of any length of pile shall not vary more than 15% over or 5% under the nominal thickness weight. Each length shall be weighed separately.

Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Diameter

The outside diameter of steel pipe piles shall not vary more than ±1% from the diameter specified.

Length

Length as specified with a tolerance of ±1˛.

WORKMANSHIP, FINISH, AND APPEARANCE

The finished pipe piles shall be reasonably straight and shall not contain imperfections in such number or of such character as to render the pipe unsuitable for pipe piles.

Surface imperfections, the depth of which does not exceed 25% of the nominal wall thickness, shall be permitted. These may be explored by grinding or filing to establish the depth.

Surface imperfections, the depth of which exceeds 25% of the nominal wall thickness shall be considered defects. Repair of defects by welding will be permitted when the depth of defect does not exceed 33 ˝ % of the nominal wall thickness. Before welding the defect shall be completely removed.

PIPE ENDS

Unless otherwise specified, material shall be furnished with either flame or machine cut plain ends. When ends are specified to be beveled, they shall be beveled to an angle of 30°+5°- 0°. All burrs at the ends shall be removed.

NUMBER OF TESTS

One tension test shall be made on one length or fraction thereof of each size, or one piece of skelp representing each lot of 200 lengths or fraction thereof of each size.

 

LENGTHS

Pipe piles shall be ordered in the following lengths :

  • Single random lengths: - 16 to 25 ft., incl.
  • Double random lengths : - over 25 ft. with a minimum average of 35 ft.
  • C) Uniform lenghts : - length as specified with a tolerance of ±1˛.

    CERTIFICATION

    Upon request of the purchaser, in the contract or order, a manufacturer’s certification that the material was manufactured and tested in accordance with this specification together with a report of the chemical and tensile tests shall be furnished.

    MARKING

    Each length of pipe pile shall be legibly marked by stenciling, stamping, or rolling to show : the name of the manufacturer; heat number; the kind of pipe; the size, weight, length, and wall thickness; and the specification number and the grade.

     

    NOTE: This is a summary of ASTM specifications.
    For additional details and information, please refer to these specifications.

    ASTM A-252
    GRADES

    SPECIFICATION ASTM A-252

    MIN MECHANICAL PROPERTIES

    STEEL GRADE

    Tensile strength ,min Ksi
    ( Mpa )
    Yield strength, min Ksi ( Mpa )
    Elongation in 2 inches
    (50mm)% min

    GRADE 1

    50 ( 345 )

    30 (205 )

    30

    GRADE 2

    60 ( 414 )

    35 ( 240 )

    25

    GRADE 3

    66 ( 455 )

    45 ( 310 )

    20

     

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