ASTM A252 LSAW Steel Pipe ASTM A252 is the standard specification for welded and seamless steel pipe piles. It covers the nominal wall thickness of cylinder shape steel pipe, rectangular pipe is not included. These round pipes are used for piling purposes, playing as a permanent role of load carrying and bearing the pressure. Further more, to act as a tank shell to fill with the concrete piles at sight of the project.
This standard stated the values units in inch-pound (also could be translated to SI units), which provides the reference A252 pipe data to engineer or designer, for a strength base of the constructions.
| Standard | AISI, EN, DIN, ASTM, ASME, GB, IS, JIS |
|---|---|
| Seamless Pipes Size in MM | 4 to 219 Wall Thickness: 0.5 to 20 |
| Welded Pipes Size | 5.0 To 1219.2 |
| EFW Pipes size in MM | 5.0 To 1219.2 |
| Schedule | Schedule 80S, Schedule 80, Schedule10, Schedule 40, Schedule XXS, Schedule 160, Schedule XS, Schedule 5 Supplier and Manufacturer |
| Seamless Tube Size in MM | 3.35 To 101.6 |
| Welded Tube Size in MM | 6.35 To 152 |
| Length | Single, Standard, Double, Cut length |
| Finish | BA, Polished, AP, MF |
| Form | Round, Hydraulic, ‘U’ bent or Hollow,LSAW, Boiler, Straight Pipes, Clad Pipe, Rectangular, Square Pipes |
| End | Plain End, Beveled End, Treaded Pipes & Tube |
| Pipes Marking | All Pipes are marked as follows: Supplier or Manufacturer’s Name, Standard, Length, Grade, Outer Diameter, Thickness, Heat Number |
| Usage | O.D.(mm) | W.T.(mm) | Length(m) |
| Oil &gas pipeline | 406-1524(16” – 60”) | 6-40 (1/4” – 1.57”) | 8-12.1 |
| for Construction(Pipe Piles) | 350-1600(14” – 63”) | 6-60 (1/4” – 2.36”) | 6-12 |
| Roller pipe | 1200-3800(47.24” – 150”) | 12-120 (1/2”- 4.7”) | <=3.2 |
| Addition to above specification, the pipes can be produced according to customer’s requirements |
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ASTM A252 standard for specification for welded and seamless steel pipe piles.
This specification covers nominal wall cylindrical steel 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. Each welded pile shall be made by seamless, electric resistance welding, flash welding or fusion welding with longitudinal, helical-butt, or helical-lap seams. This specification also deals with material tensile requirements, minimum elongation values and common size and weights per unit length values.
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 ½ % of the nominal wall thickness. Before welding the defect shall be completely removed.
It includes:
Heat Analysis: Limits to elements P, and heat result shall be reported in MTC to customer.
Product Analysis: Test frequency shall be determined by the pipe diameter, where, under 14 inch 2 samples per 200 pieces, 14 to 36 inch 2 samples per 100 pieces, above 36 inch is 2 per 3000 ft.
Tensile requirements: Values shall be complied to the above tensile strength and yield strength. It shall be noted that if got a vague yield point, then to test yield strength corresponding to a permanent offset of 0.2% of the gage length of the sample specimen, or to test a total extension of 0.5% of the gage length under load.
Pipe pile weights per units (Feet, meter or lengths)
Tolerance allowed: A252 pipe pile weight shall be in +15% or -5% of theoretic weight. OD tolerances at +/-1%, wall thickness +/- 12%.
Lengths: As specified SRL, DRL, or fixed length 20 ft or 40 ft and customized.
Hydrostatic test is not specified in ASTM A252 pipe specification, as normally piling pipe is filling with cement and concrete and forming, not for liquid transmission, so hydrotest is not required.
Seamless, welded, (Longitudinal or helical welded) test methods are different. Check ASTM A252 pipe standard specification for more details. But all of these types are tested in a room temperature.
| Grade | Chemical Component(%) | ||||||||||||
| C | Si | Mn | P | S | Gr | Ni | Cu | Mo | Al | Ti | N | Ceq | |
| max | max | max | max | max | max | max | max | max | max | max | max | max | |
| Grade 1 | - | - | - | 0.050 | - | - | - | - | - | - | - | - | - |
| Grade 2 | - | - | - | 0.050 | - | - | - | - | - | - | - | - | - |
| Grade 3 | - | - | - | 0.050 | - | - | - | - | - | - | - | - | - |
| Grade | Mechanical Properties | ||
| Minimum Tensile Strength(Mpa) | Minimum Yield Stress(Mpa) | Minimum Elongation (%) | |
| (Grage Length 50.8mm) | |||
| Grade 1 | 345 | 205 | 30 |
| Grade 2 | 415 | 240 | 25 |
| Grade 3 | 455 | 310 | 20 |
What information would be required before purchase A252 pipe
Before purchase the pipe piles under ASTM A252 specification, below information will be required:
a. Quantity in feet, meter, or number of lengths
b. Material Name in steel pipe pile
c. Manufacturing types in seamless or welded (ERW, EFW, LSAW, SSAW)
d. Grades (There are three levels of ASTM A252 Grade 3, 2, and 1)
e. Size (OD and nominal wall thickness, schedule in ASME B36.10)
f. Length in SGL, DGL or fixed length.
g. Ends types beveled or plain ends
h. Inspection related and shipping mark
Manufacturing Process of LSAW steel pipe
Longitudinally Submerged Arc Welded Process Flow
LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.
The LSAW process of welded tube includes UOE and JCOE
UOE LSAW pipe forming process:
The three main forming processes of UOE LSAW steel pipe forming process include: steel plate pre-bending, U forming and O forming. Each process adopts a dedicated forming press to complete the three processes of pre-bending the edge of the steel plate, U forming and O forming in sequence to deform the steel plate into a circular tube.
JCOE LSAW pipe forming process:
Forming: After several steps of stamping on the JC0 forming machine, first half of the steel plate is pressed into a "J" shape, then the other half of the steel plate is pressed into a "J" to form a "C" shape, and finally pressurized from the middle to form An open "0"-shaped tube blank is formed.
ASTM A252 pipe pile Sizes up to 100 inch, thickness schedule up to SCH 160, types in seamless or welded ERW, LSAW, SSAW.
Coated available in 3PE, FBE, Galvanized as requested by customer.If you have any questions about steel pipes, you can send an email to our 24-hour service email: [email protected] or call: 0086-317-5298199.
