Correct arrangement of stainless steel honing pipe and prevention of defects

- Sep 10, 2019-

The stainless steel honing pipe is made of seamless steel pipe. Because the inner and outer walls of the steel pipe have no oxidation layer, high pressure and no leakage, high smoothness, no deformation of cold bending, flaring, and flattening without cracks, it is mainly used to produce pneumatic or Hydraulic products.


The laying and orientation of the pipelines should be neat and tidy. Try to use horizontal or vertical piping. The non-parallelism of horizontal pipelines should be ≤ 2/1000; the verticality of vertical pipelines should be ≤ 2/400. Use a level meter to detect. Longer pipelines should take effective measures to avoid stress caused by temperature changes that cause the tube to expand and contract.


Generally, the diameter of 50mm or more should be cut by mechanical processing. If gas cutting is used, the mechanical processing method is used to remove the structural changes formed by the gas cutting, and at the same time, the welding groove can be driven out. Except for the return line, the pressure is not allowed to be cut by the roller extrusion cutter. The cutting surface of the pipe should be flat, and the burrs, scales, slag, etc. should be removed.


The welding rod and flux used by it should be matched with the welded pipe. The grades must have clear evidence, and there is a product certificate, and it is within the effective use period. The electrode and flux should be dried according to the product specifications before use and kept dry during use. The electrode coating should be free of detachment and cracks.


In order to prevent surface defects, on the one hand, it can increase the cold drawing deformation and increase the total deformation, which can reduce the depth of the pitting and reduce the grinding grinding margin. On the other hand, by selecting a hot-rolled pipe with a small degree of corrosion and a uniform wall thickness, the pitting defect can be reduced and the yield of the cylinder can be increased.


There is also a method of detecting the hot rolled pipe and cleaning the inner surface defects before the operation, so that the inner hole of the stainless steel honing pipe has no defects such as pitting, so that the machining allowance of the honing is small, the production cost is reduced, and the production is increased. effectiveness.