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Brand Name : No
Model Number : ASTM
Certification : ISO
Place of Origin : China
MOQ : 3Ton
Price : USD960-1500 per Ton
Payment Terms : L/C, T/T
Supply Ability : 500Ton Per Month
Delivery Time : 25-40Days
Packaging Details : Standard Packing, According to Customer Requirements
Name : Cold Rolled Seamless Steel Pipe
Thickness : 2-32mm
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.
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