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Seamless steel pipe for hydraulic applications
Process: Cold Drawn, Cold Rolled + Bright Annealed + Honed
Surface: Inner wall is burr-free, oxide-free, and strictly cleaned.
Ra：0.2 - 0.8μm (Inner Surface)
Material: Carbon Steel: 20# (AISI 1020), 45# (AISI 1045)
Low Alloy: Q355B (EN S355JR / ST52.3)
Specification: Outer Diameter: 10mm - 168mm；Wall Thickness: 2mm - 25mm
Large-diameter seamless steel pipe
Process: Hot rolling tube expansion, precision annealing
Surface: flat without peeling or burrs
Ra：≤6.3‑12.5μm
Material: Common 20 #, 45 # Q355B
Specification: Outer diameter 220-630mm, wall thickness 6-80mm customizable
Thin-wall steel tube
Process: Cold drawing and cold rolling, bright annealing
Surface: The outer wall is shiny without peeling
Ra：≤1.6‑3.2μm
Material: Common 20 #, 45 # Q355B
Specification: Outer diameter 8-114mm, wall thickness 0.5-6mm customizable
Precision steel pipes for mechanical parts
Process: Cold drawing and cold rolling, bright annealing
Surface: Smooth and burr free oxide skin
Ra：≤0.8‑3.2μm
Material: Common 20 #, 45 #, 40Cr, Q355B
Specification: Outer diameter 6-180mm, wall thickness 1-18mm customizable
Seamless steel pipes for fluids
Process: Cold drawing and cold rolling, bright annealing
Surface: Clean inner and outer walls without impurities
Ra：≤1.6‑3.2μm
Material: Common 20 # Q355B
Specification: Outer diameter 8-203mm, wall thickness 1.5-22mm customizable
Seamless steel pipes for ships
Process: Hot rolling and cold drawing, normalizing and tempering
Surface: Clean inner wall, no cracks or burrs
Ra：≤3.2‑6.3μm
Material: Commonly used Q325-A, Q355C, GPC1
Specification: Outer diameter 14-457mm, wall thickness 2-45mm customizable
Jia hui