Year1
- 规格：
- DN100
- 标准：
- GB5310
Material standards
Just like the carbon content of high-pressure seamless pipes, there are some trace elements that are more suitable for use in boiler pressure capacity, such as bending, impact, and compression resistance.
High-pressure alloy steel pipes are based on high-quality carbon structural steel pipes, with one or several alloying elements appropriately added to improve the mechanical properties, toughness and hardenability of the steel. The manufacture of alloy pipes usually requires heat treatment (normalizing or quenching and tempering). Before use, it usually requires quenching and tempering or surface chemical treatment (carburizing, nitriding, etc.), surface quenching or high-frequency quenching. Therefore, depending on the chemical composition (mainly carbon content), heat treatment process and use, this type of alloy pipe can be roughly divided into three types: carburizing, quenched and tempered and nitrided steel. Alloy pipes are mostly used to make the more important and larger-sized parts and components of mechanical products, as well as high-pressure pipes, containers, etc., and have better comprehensive mechanical properties than high-quality carbon structural steel pipes.
Small diameter seamless pipe
Small diameter seamless pipe is a small diameter seamless pipe with high dimensional accuracy and good surface finish used in mechanical structures and hydraulic equipment.
The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and at the same time help improve product quality. Small-diameter seamless pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, etc. according to different production methods. Hot-rolled seamless pipes are generally produced on automatic pipe rolling units. The solid tube blanks are inspected and cleared. The surface defects are cut into the required length, centered on the perforated end of the tube blank, and then sent to the heating furnace for heating. The piercing machine is used to pierce the holes while constantly rotating and advancing during the piercing process. Under the action of the rollers and the head, a cavity is gradually formed inside the tube blank. The gross pipe is weighed, and then sent to the automatic pipe rolling machine for continued rolling. Finally, the wall thickness is evened by the leveling machine, and the size is determined by the sizing machine to meet the specification requirements. The use of continuous pipe rolling units to produce hot-rolled seamless steel pipes is a more advanced method. If you want to obtain seamless pipes with smaller size and better quality, you must use cold rolling, cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill. Small-diameter seamless pipes are made with variable cross-section circular holes and grooves. Rolling in an annular pass formed by a fixed conical head. Cold drawing is usually carried out on a single chain or double chain cold drawing machine. The extrusion method is to place the heated tube blank in a closed extrusion cylinder. The perforated rod moves together with the extrusion rod to extrude the extruded piece from the smaller die hole. This method can produce steel pipes with smaller diameters.
Our company mainly sells seamless steel pipes, spiral steel pipes, alloy steel pipes, anti-corrosion steel pipes, and straight seam steel pipes
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