Product FAQ

ASTM-A252 is a steel pipe foundation standard for pipe piles developed by the American Society for Testing and Materials, applicable to seamless and welded steel pipes. This type of steel pipe is mainly used as a protective sleeve for load-bearing piles or concrete piles. ​The standard includes three strength levels:Grade 1: Minimum yield strength 207 MPa (30 ksi)Grade 2: Minimum yield strength 241 MPa (35 ksi)Grade 3: Minimum yield strength 310 MPa (45 ksi)

3 Types: SSAW Pipe,LSAW Pipe,ERW Pipe.

Absolutely. We specialize in custom fabrication. Send us your drawings or specifications, and our engineering team will provide suggestions and quotes.

Yes! Each shipment includes: Mill Test Certificate (EN 10204 3.1), chemical composition report, mechanical test reports, coating inspection report, and material traceability documents.

Standard products: 15-25 days. Custom sizes: 25-40 days. We provide real-time production updates.

Spiral steel pipe uses hot-rolled strip steel as raw material, and the steel strip is welded into a spiral shape by automatic submerged arc welding. Its main process steps include forming, welding, sizing, straightening, trimming and quality inspection.

Spiral steel pipe is a welded pipe, which is usually used in oil and gas, water supply and drainage projects. It is made by rolling the steel strip into a spiral shape and welding it with internal and external welds, hence the name "spiral steel pipe".