Carbon Steel Seamless Tube / Pipe – ASTM A106 Gr.B A53 Gr.B

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, 16Minnesota, ST37, ST52, 1020, 1045
Estándar: ASTM A106, ASTM A53, API 5L, GB/T 8163, GB/T 3087, DE 1626, EN 10210, JIS G3454
Outer Diameter (DE): 10.2 milímetros – 720 milímetros (1/2″ – 28″)
Espesor de pared (WT): 1.5 milímetros – 60 milímetros (SCH 10 – SCH 160, XXS)
Longitud: 5.8m, 6m, 11.8m, 12m, or as per customer request (SRL, DRL)
Surface Treatment: Black (varnished/oiled), Galvanizado, 3PE/3PP Coated, FBE Coated, Painting
End Finish: Extremo liso, Extremo biselado, Threaded End (with coupling)
Tolerancia: DE: ±1%, WT: ±10%, Longitud: ±50mm
Proceso: Hot Rolled (HR), Cold Drawn (CD), Cold Rolled (CR)

Key Features & Ventajas

• 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 días
• Certified quality – YO ASI 9001, API Q1, CE, and third-party inspection available

Aplicaciones

• 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

embalaje & Envío

embalaje: Standard export packaging – bundles tied with steel strips, hexagonal bundles, wooden pallets or crates, end caps for protection, waterproof wrapping
Marking: Steel grade, tamaño, heat number, standard, manufacturer logo (painted or stenciled)
Trade Terms: ENGAÑAR, CIF, CFR, EXW, DDP
Pago: T/T (30% deposit, 70% before shipment), L/C at sight, Western Union, Paypal (sample orders)
Tiempo de entrega: Standard sizes in stock – 3-7 días; Custom sizes – 15-30 días
Cantidad mínima de pedido: 1 ton for standard sizes; custom orders negotiable
Loading Port: Qingdao, Shanghai, Tianjin, or as requested

Por qué elegirnos

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 países. 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!