Precision cold drawn steel tube packing requirements in three kinds: bundling, packing, painting oil strapping or oil packing.
Packing general provisions, the steel tube packing should be able to guarantee the normal discharge, not loose, do not damage during transport and storage, steel pipe are banding bundles with steel belt card buckle cold drawn tubes type packing way, each strip must be taut, are not allowed to loose, taut strip after do not allow the axial and radial motion, steel belt buckle with card and card of each point card printing are to make the steel belt buckle side deformation to steel belt buckle, the buyer of steel tube packaging materials and packaging have special requirements, should be both sides talks things over, and indicate in the contract.
If you select the ordinary steel tube, then you ordered steel pipe, steel pipe with you receive, there will be a great error model. Even in a different parts of the pole and the inner diameter or wall thickness, will appear very big disparity. This pipe, in the process of use, are sure to have a lot of problems. But precision steel tube is different, this kind of steel pipe for pipeline, any part of the standard, there are very strict requirements. Although precision steel tube, also can't, pipe size of each aspect, are in full compliance with this standard. Precision steel tube, however, was the error, can be controlled in a very small range. In general, this error, can't more than two standard units, for most industries, this is enough.
Cold drawn precision steel pipe manufacturing, need to the embryo into heat within the furnace temperature is controlled in one thousand two hundred baidu. Mainly hydrogen as fuel, in the process of heating, the furnace temperature beam impact tubes control is the most important part of the need to control the temperature of a nominal range, which ensures that produce precision steel pipe can have a more stable physical properties. Heating is completed, need by water spray cooling, because after the cooling pipe will be straightening, so you can see the basic shape of precision steel tube, the whole manufacturing process is more complex.
Widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding is used with steel pipe manufacturing annular parts, such as can improve material utilization, simplifying the manufacturing process, material saving and processing time, has been widely used to make steel pipe. Precision precision seamless steel tube USES a wide range. General use precision precision seamless steel tube by ordinary carbon structural steel and low alloy steel or alloy structural steel rolling, most production, mainly used for conveying fluid pipe or structural components. . 2, is divided into three categories according to utility supply: a, according to the chemical composition and mechanical properties of supply; B, according to the mechanical properties of supply; C, according to the supply water pressure test.
According to a, b supply steel pipe, such as used for liquid under pressure, also must side impact beams carry on the hydraulic pressure test. 3, the special use of seamless steel tube boiler seamless tube, the chemical power use, geology in precision precision seamless steel tubes and oil in the chemical composition of steel seamless tube, and other (1) : the chemical composition of steel is affecting precision precision seamless steel tube performance is one of the main factors, also make tube rolling process parameters and the steel tube heat treatment process parameters of main basis.
A. alloy elements: want to join, according to the purpose.
B. residual elements: steel into, proper control.
C. the harmful elements: strictly control (As, Sn, Sb, Bi, Pb), gas (N, H, O)