Q235B GI Rectangular & Structural Steel Pipes
Highlights:
Q235B GI Rectangular Pipe
6m GI Rectangular Pipe
H8 Seamless GI Rectangular Pipe
Standards:
API, JIS, BS, GB, ASTM, DIN, etc.
Type of Pipe:
Seamless / Welded
Surface:
Black, Bright, Galvanized, Painted
Size & Shape:
Customizable – Round / Square / Rectangle
Length:
6m standard, or as requested
Material:
Q195, Q235, Q235B, SS400, SPHC
Quality:
Top Quality
Product Description
These galvanized steel pipes are versatile for structural frames, machinery, automotive applications, industrial use, and furniture manufacturing.
Specifications:
| Feature | Specification |
|---|---|
| Shape & Size | Square: 20×20 mm – 100×100 mm Rectangular: 13×26 mm – 80×120 mm Round: 1/2″–16″ (25–127 mm O.D.) Special sections: As required |
| Wall Thickness | Square/Rectangular: 1–3.5 mm Round: 0.8–4.25 mm Special sections: As required |
| Length | 6–12 m (custom lengths available) |
| Surface Treatment | Galvanized |
| Packing | Bulk/bundles for large orders Steel strips for small orders Woven cloth with steel strips Plastic bags 20ft container max 6m, 40ft container max 12m |
| Delivery Time | 20–30 days after deposit |
| Price Terms | FOB, CFR, CIF, EXW |
| Payment Terms | T/T (30% advance, balance against shipment) |
| Port of Shipment | Shanghai / Qingdao |
| Remarks | Special specifications available |
Size Range
Inner Diameter: 12–1100 mm
Wall Thickness: 2–55 mm
Maximum Length: 12 m
Dimension Tolerances by Processing Method
| Processing | Cylinder Barrel ID (mm) | Max Length (m) | Straightness (mm/m) | ID Tolerance | Wall Thickness Tolerance (mm) | ID Roughness (μm) |
|---|---|---|---|---|---|---|
| Cold Drawn | 40–320 | 12 | 0.2–0.5 | H8–H10 | ±5% | 0.8–1.6 |
| Cold Rolled | 12–100 | 12 | 0.2–0.5 | H8–H10 | ±5% | 0.8–1.2 |
| Cold Drawn + Honed | 40–500 | 8 | 0.2–0.3 | H7–H9 | ±5% | 0.2–0.8 |
| Cold Drawn-SRB | 40–400 | 7 | 0.2–0.3 | H8–H9 | ±5% | 0.2–0.4 |
| Deep Hole Drilling-Honed | 320–1100 | 8 | 0.2–0.3 | H7–H9 | ±8% | 0.2–0.8 |
| Deep Hole Drilling-SRB | 320–600 | 7 | 0.2–0.3 | H8–H9 | ±8% | 0.2–0.4 |
Production Process: Raw Materials → Cold Drawn / Rolled → Heat Treatment (BKS) → Honed or SRB → Packing
Standard & Optional Testing
100% Visual & Dimensional Inspection
100% Eddy Current Test (EN 10246-3)
100% Ultrasonic Test (EN 10246-7)
Chemical Composition Analysis
Impact Test
Main Features
Surface Roughness (Ra) ≤ 0.08 μm
Ovality ≤ 0.01 mm
Hardness HV4° or higher
Main Applications
Hydraulic cylinders & jacks
Hydraulic oil & pneumatic cylinders
Petrifaction oil pumps
Coal mine machinery
Engineering machinery, cranes, and transport equipment
Auto transmission shafts
Plastic machinery
Absorbers
Spin printing & dyeing machines
Packaging Options
Bundles
Plain or Vanished Ends (custom)
Wrapped in Waterproof Paper
Sackcloth with Steel Strips
Heavy Tri-Wall Boxes
