ASTM A252 LSAW steel pipe

Plate  feeding → Edge Milling and Beveling → Board Probe → Edge Crimping →molding→Slag→Track Pre-Welding  → Tab Welding  → Inside Welding  → Slag  → Outside Welding  → Tab Removal  → Ultrasonic Inspection  → X-ray Inspection  →  Mechanical Expansion  → Flame Flat  → Hydro-static Testing  → Ultrasonic Inspection for pipe end and welding seam  → Weld and Pipe End X-ray Inspection  → Tube end weld grinding  → End Facing and Beveling  → Weighing and measuring  → Spray paint Marking  → Final Inspection  → Storage  → Storage and Shipment

ASTM Specification A252 describes 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 case-in-place concrete piles.
Surface imperfections exceeding 25% of the nominal wall in depth are considered defects. Defects not exceeding 22.5% of the nominal wall in depth may be repaired by welding. Before welding, the defect shall be completely removed.

MECHANICAL PROPERTIES – TENSILE REQUIREMENT

	Grade 1	Grade 2	Grade 3
Tensile Strength, min, psi	50,000	60,000	66,000
Yield Strength	30,000	35,000	45,000

CHEMICAL REQUIREMENTS FOR A252

	Phosphorus
Seamless and Welded	Max% 0.050

•Testing Requirements for seamless and welded A252 steel piling pipe

-Hydrostatic Testing: Not specified.
-Mechanical Tests:
Tensile Test: Either longitudinal or transverse at option of manufacturer.
- Number of Tests: One tensile test per 200 lengths.
•Permissible Variations for A252 steel piling pipe
-Wall thickness: Not more than 12.5% under the nominal wall thickness specified.
-Weights per foot: The weight of any individual length of pipe shall not vary more than 15% over or 5% under the weight specified. Each individual length shall be weighed separately.
-Outside diameter: Shall not vary more than plus or minus 1% from the diameter specified.
•Lengths of A252 steel piling pipe
Steel Tubular Products A252 steel piling pipe may be ordered in single or double random lengths or in uniform lengths.
-Single random – 16’ – 25’ inclusive
-Double random – Over 25’ with a minimum average of 35’
-Uniform – Plus or minus 1” on length specified
•Marking Requirements
Rolled, die-stamped, or paint-stenciled (manufacturer’s option).
-Manufacturer’s name, brand, or trademark
-Heat number
-Method of pipe manufacture
-Size, weight, length
-Wall thickness
-ASTM A252 and steel grade