Product Introduction：
Seamless tube is a round tube without a welded seam at any point in its circumference. It is made using an extrusion process that does not require the joining of two ends, unlike other types.
Seamless tube is not made using and welding processes, and as such has no seam or joint. It is therefore one homogenous material, and as such does not contain any weak points or potential weld defects that can theoretically be present in welded tubes.
Sino Sea Steel stocks hundreds of sizes of seamless tube at wholesale prices in ready to ship precut and mill lengths or you can order just what you need custom Cut to Size in any quantity.
Seamless tube spefication：
Nominal Diameter (DN) | Seamless Pipe Dimensions |
DN10 | Φ14×2 |
DN15 | Φ18×2 |
DN20 | Φ25×2(2.5) |
DN25 | Φ32×3 |
DN32 | Φ38×3 |
DN40 | Φ45×3(3.5) |
DN50 | Φ57×3(3.5) |
DN65 | Φ76×4 |
DN80 | Φ89×4 |
DN100 | Φ108×4 |
DN125 | Φ133×4(5) |
DN150 | Φ159×4(5,6) |
DN200 | Φ219×5(6) |
DN250 | Φ273×6(7,8) |
DN300 | Φ325×6(7,8) |
DN350 | Φ377×8(9,10) |
DN400 | Φ426×8(9,10) |
DN450 | Φ480×8(9,10) |
DN500 | Φ530×8(9,10) |
DN600 | Φ630×8(9,10) |
DN700 | Φ720×10 |
DN800 | Φ820×10 |
DN900 | Φ920×10 |
DN1000 | Φ1020×10 |
Company Advantages：
Port Proximity：
Only dozens of km from Tianjin Port, saving up to 15% logistics cost, rapid export.
Direct Mill Network：
Deep partnerships with major steel mills in Hebei,Shandong: stable supply, transparent pricing.
100k+ Tons/Year：
Proven export experience, strict quality control, on-time delivery to 30+ countries.
One-stop Solutions：
Full integration of procurement, QC, logistics, customs clearance to boost efficiency.
