ASTM A252 LSAW Piling Pipe

ASTM A252 carbon steel pipe covers nominal (average) 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. Similar to H-piles, pipe piles of ASTM A252 carbon steel are also designed to transfer structural loads through the foundation to soils below. Where H-piles are typically classified as point bearing, pipe piles are most efficient as friction piles. Pipe piles have substantial surface area that interacts with the surrounding soil to provide great frictional load resistance.

Pipe piles are also used in conjunction with sheet piles to add lateral stiffness and bending resistance where loads exceed the capacity of sheet piles alone.

2. Product Description

3. Physicochemical Property

TABLE 1 Tensile Requirement

Grade 1      Grade 2      Grade 3

Tensile strength, min, psi (MPa)                                             50 000 (345)   60 000 (415)   66 000 (455)

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

Basic minimum elongation for nominal wall thicknesses 5 ⁄ 16 in. (7.9 mm) or more:

Elongation in 8 in. (203.2 mm), min, %                                            18           14           . . .

Elongation in 2 in. (50.8 mm), min, %                                             30           25           20

For nominal wall thicknesses less than 5 ⁄ 16 in. (7.9 mm), the deduction from

the basic minimum elongation in 2 in. (50.08 mm) for each 1 ⁄ 32 - in. (0.8 mm)

decrease in nominal wall thickness below 5 ⁄ 16 in. (7.9 mm), in percentage points          1.50 A 1.25 A 1.0 A

NOTE —Where an ellipsis (...) appears in this table, there is no requirement.

TABLE 2 Calculated Minimum Elongation Values A

Nominal Wall Thickness            Elongation in 2 in. (50.8 mm), min, %

in.                             mm        Grade 1          Grade 2       Grade 3

5 ⁄ 16 or 0.312                    7.9          30.00           25.00         20.00

9 ⁄ 32 or 0.281                    7.1          28.50           23.75         19.00

1 ⁄ 4 or 0.250                     6.4          27.00           22.50         18.00

7 ⁄ 32 or 0.219                    5.6          25.50           21.25         17.00

3 ⁄ 16 or 0.188                    4.8          24.00           20.00         16.00

11 ⁄ 64 or 0.172                   4.4          23.25           19.50         15.50

5 ⁄ 32 or 0.156                    4.0          22.50           18.75         15.00

9 ⁄ 64 or 0.141                    3.6          21.75           18.25         14.50

1 ⁄ 8 or 0.125                     3.2          21.00           17.50         14.00

7 ⁄ 64 or 0.109                    2.8          20.25           16.75         13.50