Product Overview：
The production and manufacturing process of thin-walled seamless steel pipes can be divided into four basic methods: cold drawing/cold rolling/hot rolling/hot expansion. It can be made of materials such as 10 #, 20 #, 35 #, 45 #, 16Mn, 27SiMn, 15CrMo, 35CrMo, 12Cr1MoV, 10CrMo910, etc. It can be applied to seamless steel pipes for general structures, seamless steel pipes for fluid transportation, seamless steel pipes for boilers, seamless steel pipes for petroleum cracking, seamless steel pipes for ships, etc. Thin walled seamless steel pipes are named after their external wall thickness and are mainly used in industries such as mechanical processing, coal mining and chemical engineering, and hydraulic steel.
| Product List |
| Product Name: | 10 # Thin walled seamless steel pipe | Seamless pipe |
| Product Name: | 20 # thin-walled seamless steel pipe | seamless pipe |
| Product Name: | 45 # thin-walled seamless steel pipe | seamless pipe |
| Product Name: | Q235 thin-walled seamless steel pipe | Seamless pipe |
| Product Name: | Q345 thin-walled seamless steel pipe | seamless pipe |
| Product Name: | 16Mn thin-walled seamless steel pipe |
| Product Name: | 40Cr thin-walled seamless steel pipe |
| Product Name: | 27SiMn thin-walled seamless steel pipe | Seamless pipe |
| Product Name: | 12Cr1MoV thin-walled seamless steel pipe | Seamless pipe |
| Product Name: | 15CrMo thin-walled seamless steel pipe | Seamless pipe |
| Parameter range |
| Outer diameter | Φ6mm‑Φ219mm |
| Wall thickness | 0.5mm‑6mm |
| Standard length | 1‑12m， Customizable short and long rulers |
| Outer diameter accuracy | Maximum ± 0.03mm |
| Executive Standards | ASTM A519, EN 10305-1, DIN 2391, GB/T 3639 |
| Non-standard customization | Support customized ultra-thin wall, non-standard outer diameter, and inner hole polishing |
| High frequency spot specification table (mainly cold drawn, S ≤ 4mm） |
| Outer Diameter (mm) | 14
| 16 | 18 | 20 | 25 | 32 | 38 |
| Standing wall thickness (mm) | 1.5、2、2.5 | 1.5、2、2.5、3 | 2、2.5、3 | 2、2.5、3 | 2、2.5、3、3.5 | 2、2.5、3、3.5、4 | 2.5、3、3.5、4 |
| Outer Diameter (mm) | 45
| 48 | 57 | 60 | 76 | 89 | 108 |
| Standing wall thickness (mm) | 2.5、3、3.5、4 | 2.5、3、3.5、4 | 3、3.5、4 | 3、3.5、4 | 3、3.5、4 | 3、3.5、4 | 3、4 |
Optional tolerance range |
| Tolerance control | Optional manufacturing process |
| Tolerance ≤ 0.05 mm | Cold rolling |
| Tolerance ≤ 0.10 mm | Cold rolling |
| Tolerance ≤ 0.30 mm | Cold drawing | Cold rolling |
| Tolerance ≤ 0.50 mm | Cold drawing | Hot rolling |
| Tolerance ≤ 1.00 mm | Hot rolling | Hot expanding |
| Outer diameter tolerance table (cold drawn thin-walled tube, ordinary grade) |
| Outer Diameter (mm) | 20
| 25 | 32 | 38 | 45 | 57 | 76 | 89 | 108 |
| Outer diameter ± tolerance (mm) | ±0.15 | ±0.19 | ±0.24
| ±0.29 | ±0.34 | ±0.43 | ±0.57 | ±0.67 | ±0.81 |
| Qualified range (mm) | 19.85-20.15 | 24.81-25.19 | 31.76-32.24 | 37.71-38.29 | 44.66-45.34 | 56.57-57.43 | 75.43-76.57 | 88.33-89.67 | 107.19-108.81 |
| Wall thickness tolerance table (S ≤ 4mm) |
| Wall thickness (mm) | 1.5
| 2.0 | 2.5 | 3.0 | 3.5 | 4.0 |
| Upper deviation (mm) | +0.23 | +0.30 | +0.38 | +0.45 | +0.44 | +0.50 |
| Lower deviation (mm) | -0.15 | -0.20 | -0.25 | -0.30 | -0.35 | -0.40 |
| Qualified range (mm) | 1.35-1.73 | 1.80-2.30 | 2.25-2.88 | 2.70-3.45 | 3.15-3.94 | 3.60-4.50 |
| Length and bending tolerance |
| project | Fixed length | Fixed length | Bending degree per meter |
| condition | L ≤ 6m | L＞6m | All thin-walled tubes |
| allowable deviation | +30 / 0 mm | +50 / 0 mm | ≤1.5 mm/m |
| Precision thin-walled bright hydraulic pipes comply with GB/T 3639-2021, with higher accuracy and smaller tolerances, and are not mixed with fluid cold drawn pipes in this table. |
Optional delivery status
|
| Oil removal from oil pipes | Annealing and straightening | Steel pipe corrosion prevention |
| Steel pipe threading | Length cut-to-length | Steel pipe coating |
| Steel pipe cap | Exquisite bundling | Beveling |
Now ready to place an order:
You can view Ordering Matters | Payment Matters, or enter Submit Purchase | Contact Us
Jia hui
Jia hui