(3). The water flow indicator The flow indicator is installed in the pipeline, when there is flow of water goes through the pipe which is more than scheduled flow, the water flow indicator emits electrical signals, shows the flow of water. Usually the flow indicator is settled on the distribution pipe of the fire fighting [...]
In the former article, we have talked much on the main production process of big straight welded pipe, and now I’d like to give a detailed information on the analytic description of the dry welding technology of large diameter thick wall welding. Dry welding technology of large diameter thick wall welding Automatic welding of large [...]
Introduction Special shape steel pipe is a kind of economic cross section steel tube including non circular cross section, equal-thickness wall, variable wall thickness, symmetrical section, no-symmetrical section, etc. Such as square, rectangle, conical, trapezoidal, spiral, etc. The special shape steel pipe is more suitable for the particular condition of use. And it can save [...]
In this article, we will talk mainly about the production process of the big straight welded pipe, and to make you know clearly what the process all included. Introduction of Domestic Big Straight Seam Welded Pipe Production Technology Straight seam welded pipe is made of steel plate or steel strip after bending forming, and then [...]
The Difference Between the Straight Seam Welded Pipe and the General Welded Pipe Straight seam welded pipe Straight seam welded pipe is made of steel plate or steel strip after bending forming, and then through welding. Divided into the form of the weld seam welded pipe and spiral welded pipe by the welding forming method. [...]
All the insider knows that steel pipe surface treatment is one of the key factors determine the service life of the pipeline corrosion, it is a precondition for whether the anti-corrosion layer and steel tube can be combined. It is verified by the research institutions that the life of the coating depends on the quality [...]
In the last article, the article talks much on the specific operation methods for the surface treatment of steel pipe, and in this article, which problems should be pay attention on when using spray (cast) shot derusting will be the main topic. Descaling grade The construction process commonly used for anti-corrosive [...]
Spiral steel pipe submerged arc welding process Automatic submerged arc welding was invented in 1940, a new kind of welding method, it adopts slag protection as manual welding, but is not coated electrode, the slag is specially welding flux smelting. This coating system is composed of a funnel with welding flux through a pipeline to [...]
Galvanized pipe coating process A continuous galvanized pipe coating production technology and equipment, and the process includes the following steps: passivation, cleaning; paint; curing, with drying preheating before coating, and the drying preheating temperature is about ±20 ℃ of the curing temperature. The device is based on the known device, before the dip-coating slot with [...]
Thick wall seamless steel tube production process Cutting the circular tube embryo to about 1 meter of billet by cutting machine. The thick wall steel pipe is the pipe that the ratio between outer diameter and thickness is less than 20. Thick wall steel tube is mainly used for petroleum geological drill pipe, oil chemical [...]