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  • ASTM A252 GR.2 ERW Steel Piles Pipe

ASTM A252 GR.2 ERW Steel Piles Pipe

Pipe ordered under this specification is for 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.

PRODUCT DESCRIPTION

Standard: ASTM A252

Application of ASTM A252 ERW Steel Pipe:

Pipe ordered under this specification is for 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.

Manufacturing Process of ASTM A252 ERW Steel Pipe:

By electric resistance welded

Details of ASTM A252 ERW Steel Pipe We can supply:

Manufacture: Carbon ERW Steel Pipe

Size: O.D.: 168~700mm W.T.: 2~20mm

Grade: Gr1, Gr2, Gr3

Length: 6M or specified length as required.

Ends: Plain End, Beveled End.

Chemical Composition:

The steel shall contain no more than 0.050 % phosphorous.

Tensile Requirements

Tensile Requirements

Grade 1Grade 2Grade 3
Tensile strength, min, psi (MPa)50 000 (345)60 000 (415)66 000 (455)
Yield point or yield strength, min, psi(MPa)30 000 (205)35 000 (240)45 000 (310)
Basic minimum elongation for nominal wall thicknesses %6 in. (7.9 mm) or more:Elongation in 8 in. (203.2 mm), min, % Elongation in 2 in. (50.8 mm), min, %18301425...20
For nominal wall thicknesses less than %6 in. (7.9 mm), the deduction from the basic minimum elongation in 2 in. (50.08 mm) for each Vzi - in. (0.8 mm) decrease in nominal wall thickness below %6 in. (7.9 mm), in percentage points1.5A1.25A1.0A...


Table 2 gives the computed minimum values:


Calculated Minimum Elongation Values
Nominal Wall ThicknessElongation in 2 in. (50.8 mm), min, %
in.mm.Grade 1Grade 2Grade 3
5/16(0.312)7.930.0025.0020.00
9/32(0.281)7.128.5023.7519.00
1/4(0.25)6.427.0022.5018.00
7/32(0.219)5.625.5021.2517.00
3/16(0.188)4.824.0020.0026.00
11/6(0.172)4.423.2519.5015.50
5/32(0.156)4.022.5018.7515.00
9/64(0.141)3.621.7518.2514.50
1/8(0.125)3.221.0017.5014.00
7/64(0.109)2.820.2516.7513.50
The above table gives the calculated minimum elongation values for various nominal wall thicknesses. Where the specified nominal wall thickness is intermediate to those shown above, the minimum elongation value shall be determined as follows:Grade:1 E=48t+15.002 E=40t+12.503 E=32t+10.00 where: E = elongation in 2 in., %, andt = specified nominal wall thickness, in.


Tolerance of outside diameter, wall thickness, length and weight:

Outside Diameter

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

Wall thickness

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

Lengths

Pipe piles shall be furnished in single random lengths, double random lengths, or in uniform lengths as specified in the purchase order, in accordance with the following limits:

a. Single random lengths 16 to 25ft (4.88 to 7.62mm), inch

b. Double random lengths Over 25ft (7.62m) with a minimum average of 35ft (10.67m)

c. Uniform lengths length as specified with a permissible variation of ±1 in.

Weight

Each length of pipe pile shall be weighed separately and its weight shall not vary more than 15% over or 5% under its theoretical weight, calculated using its length and its weight per unit length.

Marking:

d. Manufacturer’s name or its identifying brand

e. Dimensions(nominal diameter and nominal wall thickness,length and weight per unit length )

f. Heat number

g. The process of manufacture(seamless)

h. Grade

i. Specification designation

Packing for ASTM A252 ERW Steel Pipe:

a. Bare pipe, black coating, etc

b. 6" and below sizes In bundles with two cotton slings, other sizes in loose;

c. Both ends with end protectors;

d. Plain end, bevel end

e. Marking.