385,00 €
– Nominal diameter: DN25 (1 inch).
– Outer diameter D: 25 mm (according to national standards, DN25 is typically 33.7 mm; 25 mm is a thin-walled, non-standard/greenhouse pipe).
– Wall thickness S: 2.0 mm (± 0.2 mm)
– Inner diameter: 25−2×2 = 21 mm
– Standard length: 6 meters/piece (customizable to 3–12 meters).
– Theoretical weight: (25−2) × 2 × 0.02466 ≈ 1.13 kg/m, 6 meters ≈ 6.78 kg/piece.
– Material: Q195/Q215/Q235B (low-carbon steel).
– Implementation standards: GB/T 3091-2015 (low-pressure fluid welded pipes), GB/T 13912-2022 (hot-dip galvanized coating).
Availability: 1000 in stock
– Hot-dip galvanizing (main method in engineering): – Process: The steel pipe is immersed in molten zinc at around 450°C, resulting in a zinc layer ranging from 20 to 120 micrometers in thickness.
– Features: Even galvanization inside and out, strong adhesion, excellent corrosion resistance. Can be used outdoors for 15 to 30 years.
– Zinc layer weight: ≥275g/㎡ (national standard).
– Cold-galvanized (electroplated zinc, rarely used): – Process: room-temperature electrochemical deposition.
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