We are committed to providing one-stop service for steel pipe products to customers around the world.
We are committed to providing one-stop service for steel pipe products to customers around the world.
Galvanized pipes have a wide range of uses. In addition to oil and other low-pressure fluid pipelines, it is also used as oil well pipes in the petroleum industry, especially in offshore oil fields, oil heaters in chemical coking equipment, coal distillation, and oil washing converter pipes, bridges, etc. Pipe pile, mining tunnel support frame with pipe, etc. Developed countries in the world started to develop new pipes and continuously banned galvanized pipes.
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Thickness |
1-200mm；or as required |
Length: |
2000-16000mm，or as required |
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Dimensions |
16-1020mm；(1/2inch~40inch)Dimensions |
Technique |
Hot Rolled Or Cold Rolle |
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Zinc Coating |
pre galvanized steel pipe: 60-150g/m2 |
Surface treatment |
Cold galvanizing，Hot dip galvanized |
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Certification: |
CE, ISO, SGS，BV，Mill Certificate |
Standard: |
ASTM，JIS，GB，DIN，EN |
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price terms |
FOB,CRF,CIF,EXW, CPT |
Payment Terms |
T/T, L/C at sight,West Union |
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Grade |
Q195—Grade B, SS330, SPC, S185 |
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Q215—Grade C,CS Type B, SS330, SPHC， |
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Q235---Grade D, SS400, S235JR, S235JO, S235J2， |
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Q345---SS500, ST52，S355JR |
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Delivery Detail |
Standard has Stock; Normal About 3-5days; Custom-made 15-20days；According to order's quantity. |
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Packing |
standard export packing (inside:water proof paper,outside:fumigated wooden box) |
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hot-dip/cold galvanized steel pipe specification
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regulation |
grid |
OD mm |
Wall thickness mm |
Minimum wall |
Welded pipe ( 6 m fixed length) |
Galvanized pipe ( 6 m fixed length) |
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Nominal inner diameter |
inch |
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Thick mm |
Meter weight kg |
Root weight kg |
Meter weight kg |
Root weight kg |
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DN15 |
1/2 |
21.3 |
2.8 |
2.45 |
1.28 |
7.68 |
1.357 |
8.14 |
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DN20 |
3/4 |
26.9 |
2.8 |
2.45 |
1.66 |
9.96 |
1.76 |
10.56 |
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DN25 |
1 |
33.7 |
3.2 |
2.8 |
2.41 |
14.46 |
2.554 |
15.32 |
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DN32 |
1.25 |
42.4 |
3.5 |
3.06 |
3.36 |
20.16 |
3.56 |
21.36 |
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DN40 |
1.5 |
48.3 |
3.5 |
3.06 |
3.87 |
23.22 |
4.1 |
24.6 |
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DN50 |
2 |
60.3 |
3.8 |
3.325 |
5.29 |
31.74 |
5.607 |
33.64 |
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DN65 |
2.5 |
76.1 |
4 |
3.5 |
7.11 |
42.66 |
7.536 |
45.21 |
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DN80 |
3 |
88.9 |
4 |
|
8.38 |
50.28 |
8.88 |
53.28 |
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DN100 |
4 |
114.3 |
4 |
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10.88 |
65.28 |
11.53 |
69.18 |
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DN125 |
5 |
140 |
4.5 |
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15.04 |
90.24 |
15.942 |
98.65 |
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DN150 |
6 |
168.3 |
4.5 |
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18.18 |
109.08 |
19.27 |
115.62 |
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DN200 |
8 |
219.1 |
6 (welded pipe) |
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31.53 |
189.18 |
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DN200 |
8 |
219.1 |
6.5 hot-dip galvanizing |
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36.12 |
216.72 |
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name Weigh |
Chinese standard |
Enterprise standard |
Contrast conclusion |
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Low pressure fluid conveying welded steel pipe |
Welded steel pipe |
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GB/T3091-2001 |
Q/YF01-2002 |
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1 |
Steel pipe outer diameter |
Steel pipe outer diameter, outer diameter allowable deviation |
Better than Chinese standards |
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Outer diameter D/mm |
Tube outer diameter deviation mm |
Tube outer diameter Deviation mm |
Outer diameter D |
8″ |
± 0.60mm |
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D< 48.3 |
± 0.5mm |
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5″-6″ |
± 0.50mm |
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48.3<D < 168.3 |
± 1.0% |
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4″ |
± 0.40mm |
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168.3<D < 508 |
± 0.75% |
+2.4 -0.8 |
3″-“ |
± 0.30mm |
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D>508 |
± 1.0% |
+3.0 -0.8 |
2″ or less |
± 0.20mm |
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Wall thickness deviation |
± 12.5% |
Wall thickness S |
1.8 5.75mm |
5% |
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2 |
Usual length |
Allowable deviation |
length |
Usual length |
Allowable deviation |
Better than Chinese standards |
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4M-12M |
+20 -0 |
2 inches or less |
5-0 |
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Double length: 5-10mn ® should be left for each double in the usual length Margin |
+20 -0 |
2.5 inches – 4 inches |
5-0 |
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5 inches or more |
15-0 |
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Special length |
20-0 |
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Standard: ASTM A53, BS1387-85, GB/T3091-08, DIN2440, JIS-G3444, EN10240, EN10255
Grade: Q195, Q215, Q235, Q345, S235JR, S275JR, STK400, STK500
API SPEC 5L — Specification for Line Pipe
ASTM A53/A53M — Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
ASTM A500 — Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
BS 1387 — Specification for screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads
BS 1139 — Metal scaffolding. Specification for prefabricated mobile access and working towers
EN 39 — Loose steel tubes for tube and coupler scaffolds
EN 10255 — Non-alloy steel tubes suitable for welding and threading
Welded pipe inspection - pickling - washing - coating solvent - aligning - drying - hot galvanizing - external blowing - internal blowing - water cooling - intermediate inspection - passivation - drying - typing - packaging - final inspection
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