How To Distinguish the Quality of Thick-Walled Seamless Steel Pipe

First of all, the good quality thick-walled seamless steel pipe is uniform in composition, the cutting head looks very regular, and it is more lubricious to touch, rather than a stinging feeling. If it is a defective material, it is uneven on the cutting head, and the whole steel pipe looks dull. If it is a counterfeit seamless steel pipe, then there will be extraordinarily significant in color, showing a reddish color, and the residual thick-walled seamless steel pipe is not up to standard in temperature.

1. The main characteristic of ordinary ordinary seamless steel pipe is that it has no welded joint and can withstand large pressure. The product can be a very rough cast or cold-draw.
2. cold drawn seamless steel pipe is a product that has appeared in recent years, mainly the inner hole, outer wall size has strict tolerance and roughness.

Secondly, the cross-section of the shoddy thick-walled seamless steel pipe is not round, and may be elliptical or other shapes. This is because the manufacturer has saved the data and cut corners, so this is not suitable for the outer dimensions. Specification. In addition, it is the appearance of scarred appearance, which is not allowed on high-quality thick-walled seamless steel pipes, but it is easy to see on the thick-walled seamless steel pipe.

Generally, the thick-walled seamless pipe is made of high-quality carbon steel such as 10#, 20#, 30#, 35#, 45#, etc. 16Mn, 15MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn, 40MnB and other combined steel hot rolled or cold rolled. Thick-walled seamless pipes made of low carbon steel such as 10# and 20# are mainly used for fluid conveying pipes. 45, 40Cr and other medium-carbon steel thick-walled seamless pipe is used to manufacture mechanical parts, such as trucks, automotive parts.

Generally, thick-walled seamless pipes are required to ensure strength and flattening tests. The hot rolled steel pipe is delivered in a hot rolled state or a heat treated state; the cold rolling is delivered in a heat treated state by heat. Thick-walled seamless pipe for low and medium pressure boilers: used in the manufacture of various low and medium pressure boilers, superheated steam pipes, boiling water pipes, water wall pipes and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arch brick pipes wait.

Features of PMC seamless steel pipe:
1. The outer diameter is smaller.
2. High precision can be used to make small batches.
3. Cold drawn (rolled) seamless steel pipe with high precision and good surface quality.
4. The cross-sectional area of cold drawn seamless steel pipes is more complicated.
5. The performance of cold drawn seamless steel pipe is superior, and the seamless steel pipe is relatively dense.
6. The cold-drawn seamless steel pipe is relieved, and the inner and outer diameters can be controlled within 10 wires according to customer requirements.
It is a cold drawn or cold rolled seamless steel pipe with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment.