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Seamless steel pipe quality inspection methods
1. Chemical composition analysis: chemical analysis method, instrumental analysis method (infrared C-S instrument, direct reading spectrometer, zcP, etc.). ① Infrared C-S meter: Analyze ferroalloys, steelmaking raw materials, and C and S elements in steel. ②Direct reading spectrometer: C, Si, Mn,...Read more -
The difference between galvanized steel pipe and hot-dip galvanized steel pipe
A galvanized steel pipe is generally called a cold-plated pipe. It adopts an electroplating process and only the outer wall of the steel pipe is galvanized. The inner wall of the steel pipe is not galvanized. Hot-dip galvanized steel pipes use a hot-dip galvanizing process, and the inner and oute...Read more -
Quality identification of spiral steel pipes
1. The trademarks and printing of high-quality tubes are relatively standard. 2. The composition of high-quality steel is uniform, the tonnage of the cold shear machine is high, and the end face of the cutting head is smooth and regular. However, due to poor raw materials, the end face of the cut...Read more -
The problem of uneven thickness of anti-corrosion coating on spiral steel pipes and how to deal with it
Spiral steel pipes are mainly used as fluid pipes and piling pipes. If the steel pipe is used for water drainage, it will generally undergo anti-corrosion treatment on the inner or outer surface. Common anti-corrosion treatments include 3pe anti-corrosion, epoxy coal tar anti-corrosion, and epoxy...Read more -
Anti-corrosion painting and development analysis of straight seam steel pipes
The performance and functions of the original color straight seam steel pipe in the specific use process fully demonstrate the operational contribution and usability. After painting and spraying white letters, the straight seam steel pipe also looks very energetic and beautiful. Now Pipe fittings...Read more -
What are the differences between the surface processing of spiral steel pipe and stainless steel pipe
Let’s first talk about the original surface of the stainless steel pipe: NO.1 The surface that is heat treated and pickled after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industry equipment, etc., with thicker thicknesses ranging from 2.0MM-8.0MM. Blunt sur...Read more