ASTM A252 GR1 GR2 Construction Round Shape ERW Steel Tubes

ERW ( Electric Resistance Welded ) pipes are welded longitudinally, manufactured from Strip / Coil and can be manufactured up to 24” OD. ERW pipe cold formed from a ribbon ofsteel pulled through a series of rollers and formed into a tube which is fused through an electric charge. It is mainly used for low/ medium pressure applications such as transportation of water/oil.

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 ERW Welded	Max% 0.050

  • 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.
• Testing Requirements for seamless and welded A252 steel piling pipe

• 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.

Our Advantage:

Huayang specialized in manufacturing welded carbon steel pipes for 15 years. The annual output is around 1,000,000 tons. Our products have been exported to 40 countries and regions till now, such as Canada, Hong Kong, Vietnam, Bangladesh, The U.A.E, America, Spain, Italy, Netherlands, Kuwait, Saudi Arabia etc. So any inquiry or special demands will get fast and most professional reply.

Why choose us?

1. We are API/ISO Certificated manufacturer.

2. Have cooperated with a lot of importers for more than 8 years.

3. Experienced in doing business with big customers.

4. Quick delivery time for decent orders.Near to Tianjin port.

5. Factory audited by SGS.

6. Free samples could be provided.