PROGRÈS
Product Overview
Our Carbon Steel Seamless Tube (also known as seamless steel pipe) is manufactured from high-quality carbon steel billets through hot rolling or cold drawing processes. With no welded seam, seamless tubes offer superior strength, pressure resistance, and reliability for high-pressure and high-temperature applications. We supply a comprehensive range of carbon steel seamless tubes in various grades, sizes, and specifications to meet your project requirements.
Specifications
Steel Grades: ASTM A106 Gr.B, A53 Gr.B, API 5L Gr.B, 20#, 45#, Q345B, 16Mn, ST37, ST52, 1020, 1045
Standard: ASTM A106, ASTM A53, API 5L, GB/T 8163, GB/T 3087, DEPUIS 1626, DANS 10210, JIS G3454
Outer Diameter (DEPUIS): 10.2 mm – 720 mm (1/2″ – 28″)
Épaisseur du mur (WT): 1.5 mm – 60 mm (SCH 10 – SCH 160, XXS)
Longueur: 5.8m, 6m, 11.8m, 12m, or as per customer request (SRL, DRL)
Surface Treatment: Black (varnished/oiled), Galvanisé, 3PE/3PP Coated, FBE Coated, Painting
End Finish: Extrémité plate, Extrémité biseautée, Threaded End (with coupling)
Tolérance: DEPUIS: ±1%, WT: ±10%, Longueur: ±50mm
Processus: Hot Rolled (HR), Cold Drawn (CD), Cold Rolled (CR)
Key Features & Avantages
- Superior pressure resistance – no welded seam eliminates weak points
- Excellent mechanical properties – high tensile strength and toughness
- Wide size range – from small diameter precision tubes to large diameter pipes
- Customizable specifications – grades, sizes, lengths, and coatings tailored to your needs
- Rigorous quality control – full traceability from raw material to finished product
- Cost-effective – competitive pricing with bulk order discounts
- Fast delivery – large inventory for standard sizes, custom orders in 15-30 jours
- Certified quality – OIN 9001, API Q1, CE, and third-party inspection available
Applications
- Oil and gas transmission pipelines
- Petroleum refining and petrochemical plants
- Power plants – boiler tubes, superheater tubes
- Hydraulic and pneumatic systems
- Construction and structural applications
- Mechanical engineering and machinery manufacturing
- Automotive and transportation components
- Water supply and sewage systems
- Heat exchangers and condensers
- Mining and mineral processing equipment
Quality Control & Testing
Every batch of our carbon steel seamless tubes undergoes strict quality control procedures:
Raw Material Inspection: Chemical composition analysis (spectrometer), dimensional verification
Process Control: In-line monitoring of rolling temperature, wall thickness, and surface quality
Finished Product Testing: Hydrostatic pressure test, ultrasonic flaw detection (UT), eddy current testing (ET), tensile test, impact test, hardness test, flattening test, flaring test
Surface Inspection: Visual inspection for cracks, folds, scars, and other defects
Documentation: Mill Test Certificate (MTC) per EN 10204 3.1, material traceability records
Emballage & Expédition
Emballage: Standard export packaging – bundles tied with steel strips, hexagonal bundles, wooden pallets or crates, end caps for protection, waterproof wrapping
Marking: Steel grade, taille, heat number, standard, manufacturer logo (painted or stenciled)
Trade Terms: GOUSSET, CIF, CFR, EXW, DDP
Paiement: T/T (30% deposit, 70% before shipment), L/C at sight, Western Union, PayPal (sample orders)
Délai de mise en œuvre: Standard sizes in stock – 3-7 jours; Custom sizes – 15-30 jours
MOQ: 1 ton for standard sizes; custom orders negotiable
Loading Port: Qingdao, Shanghai, Tianjin, or as requested
Pourquoi nous choisir
With over 15 years of experience in steel manufacturing and export, we are a trusted supplier of carbon steel seamless tubes to customers in more than 50 des pays. Our factory is equipped with advanced production lines and testing equipment, ensuring consistent quality and on-time delivery. We offer one-stop service from material selection to after-sales support, and our experienced engineering team can provide technical consultation and customized solutions for your specific applications. Contact us today for a competitive quote!
