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Product Details:
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| Name: | Cold Rolled Seamless Steel Pipe | Thickness: | 2-32mm |
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| OD: | 12-114mm | Surface: | Bright |
| Payment: | T/T,LC | Length: | 5.8~12m |
| Tolerance: | ±10% | Keyword: | Seamless Steel Pipe |
| Technology: | Cold Rolled | Type: | Seamless |
Product Name: Cold Rolled Precision Seamless Steel Pipe
Material:Carbon&Alloy
Outer Diameter: 12-114mm
Wall Thickness: 2-32mm
Grade:ST35 (E235) ST37.4 ST45 (E255) ST52 (E355)10#,20#,45#,16Mn,30CrMo,SCM430,Q345,Or other special material
Main varieties of steel pipes: High-precision precision bright seamless steel pipes, special steel pipes for hydraulic systems, special steel pipes for automobile manufacturing
Precision cold rolled pipe has the characteristics of high precision, high smoothness, good inner wall cleanliness, high pressure without leakage, cold bending without deformation, flaring, flattening without cracks, etc. It can be used for various complex deformation and mechanical processing.
Delivery Conditions
BKS(+SR): After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere.
NBK(+N): After the final cold drawing operation the tubes are normalized in a controlled atmosphere.
GBK(+A): After the final cold drawing process the tubes are annealed in a controlled atmosphere.
BK(+C): No heat treatment after the final cold drawig process.
BKW(+LC): After the final heat treatment there is a suitable drawing pass.
Size Deviation
| Deviation level | Standardized Outer Diameter Tolerance |
| D1 | ±1.5%. Minimum±0.75 mm |
| D2 | ±1.0%. Minimum±0.50 mm |
| D3 | ±0.75%. Minimum±0.30 mm |
| D4 | ±0.50%. Minimum±0.10 mm |
Production Process
Different processing methods and corresponding auxiliary procedures are selected according to the processing performance of the metal, the size of the pipe, the quality requirements, and the investment and benefits. The basic processes of cold-rolled and cold-drawn pipes are:
(1) pipe material supply, the pipe materials used are hot-rolled finished pipes or semi-finished pipes, extruded pipes and welded pipes;
(2) pipe material preparation, including inspection, bundling, acid Washing, cleaning, rinsing, neutralizing, drying, lubricating, etc.;
(3) Cold working (cold rolling or cold drawing);
(4) Finishing of finished products includes heat treatment of finished products, straightening, sampling, cutting heads and tails, inspection ( Manual inspection and various flaw detection), hydraulic test, oiling, packaging, storage, etc. Different products have different finishing contents.
Our Company
Contact Us
Contact Person: Legends Shen
Tel: 8615725552250
