The process of Ssaw steel pipe:
Steel coils→Ray material test → Delivery straightening → Plate cutting and welding → circle shear edge milling → Forming → inside auto-welding → Outside auto-welding → Online ultrasonic inspection → Fixed length cutting → Visual inspection for outside seam → Visusl inspection for inside seam → X-ray inspection for welding seam → Even end and end bevel → Hydrostatic test → Ultrasonic inspection → Final product inspection → Marking → Store up
A252 Comparitive Specifications
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.
Steel coils→Ray material test → Delivery straightening → Plate cutting and welding → circle shear edge milling → Forming → inside auto-welding → Outside auto-welding → Online ultrasonic inspection → Fixed length cutting → Visual inspection for outside seam → Visusl inspection for inside seam → X-ray inspection for welding seam → Even end and end bevel → Hydrostatic test → Ultrasonic inspection → Final product inspection → Marking → Store up
A252 Comparitive Specifications
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 REQUIREMENTS
|
|
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
o Hydrostatic Testing: Not specified.
o Mechanical Tests:
Tensile Test: Either longitudinal or transverse at option of manufacturer.
o Number of Tests: One tensile test per 200 lengths.
• Permissible Variations for A252 steel piling pipe
o Wall thickness: Not more than 12.5% under the nominal wall thickness specified.
o 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.
o 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.
•
o Single random – 16’ – 25’ inclusive
o Double random – Over 25’ with a minimum average of 35’
o Uniform – Plus or minus 1” on length specified
• Marking Requirements
Rolled, die-stamped, or paint-stenciled (manufacturer’s option).
•
o Manufacturer’s name, brand, or trademark
o Heat number
o Method of pipe manufacture
o Size, weight, length
o Wall thickness
o ASTM A252 and steel grade
Other Types of API 5L / ASTM A252/ EN10219-2/ ASTM A572 Spiral Steel Pipe / SSAW Steel Pipe:
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API 5L / ASTM A252/ EN10219-2/ ASTM A572 Spiral Steel Pipe |
API 5L / ASTM A252/ EN10219-2/ ASTM A572 SSAW Steel Pipe |
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spiral welded pipe |
ssaw pipe |
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welded tubes |
ssaw pipe supplier |
|
spiral welded steel pipe suppliers |
API 5L ssaw pipe suppliers |
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spiral welded tube |
ASTM A252 ssaw pipe manufacturer |
|
pipa spiral welded |
API 5L gr.b ssaw pipe suppliers |
|
spiral seam pipe suppliers |
API 5L x42 ssaw pipe suppliers |
|
spiral steel tube |
API 5L x46 ssaw pipe suppliers |
|
spiral welded stainless steel pipe |
API 5L x52 ssaw pipe suppliers |
|
spiral seam welded pipe |
API 5L x60 ssaw pipe suppliers |
|
spiral seam pipe |
API 5L x65 ssaw pipe supplier |
|
spiral steel pipe |
API 5L x70 ssaw pipe supplier |
|
spiral pipe supplier |
ssaw pipe manufacturer |
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spiral welded carbon steel pipe supplier |
Ssaw steel pipes |
|
spiral welded steel pipe supplier |
ssaw welding steel pipes |
|
spiral welded pipes manufacturer |
spiral pipe suppliers |
|
spiral welded pipe suppliers |
ssaw pipe in China |
DIMENSION TOLERANCES OF SSAW STEEL PIPE
|
Standard |
Standard |
|||||
|
SY/T5040-2000 |
Y/T5037-2000 |
SY/T9711.1-197 |
ASTM A252 |
AWWA C200-9 |
API 5L PSL1 |
|
|
Tube end OD deviation |
± 0.5%D |
± 0.5%D |
-0.79mm～+2.38 |
<± 0.1%T |
<± 0.1%T |
± 1.6mm |
|
Wall thickness |
± 10.0%T |
D<508mm, ±12.5%T |
- 8%T～+19.5%T |
<- 12.5%T |
-8%T～+19.5%T |
5.0mm |
|
D>508mm, ±10.0%T |
T≥15.0mm, ±1.5m |
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SPECIFICATIONS OF SSAW STEEL PIPE
