Changsha Xiangjia Metal Materical Co., Ltd.

The strength of the   spiral welded pipe   is higher than   straight seam welded pipe . It can produced by larger diameters from narrower billets and the same width billets can produce different diameters spiral welded pipes. Most of the maller diameters welded pipe use straight seam welded pipe and most of the large diameters welded pipes use spiral welded pipe. Spiral welded steel pipe can be divided into automatic submerged arc welded steel pipe and high frequency welded steel pipe. a. Spiral seam automatic submerged arc welded steel pipes are divided into A-type pipes and B-type pipes according to the pressure of the conveying medium. Type A pipes are welded with ordinary carbon steel Q235, Q235F and ordinary low-alloy structural steel 16Mn, and Type B pipes are welded with Q235, Q235F, Q195, etc., and are used as low-pressure fluid conveying pipes. b. Spiral seam high frequency welded steel pipe has no unified producting standard, it is made of ordinary carbon steel Q235, Q235F et

The   bright precision tube   is a kind of seamless steel pipe with oil on the surface that is much more precise than the hot-rolled seamless steel tube. Usually, the dimensional tolerance of the bright precision tube can be guaranteed within 10 wires. Size can be customized. The production process of bright precision tube: round steel perforation - pickling - mill rolling - dimension measurement - delivery Ordinary precision tubes are easy to break during the bending process. Therefore, it is necessary to anneal the bright precision tube to improve the mechanical properties. The annealed precision tubes are called fine-rolled annealed seamless steel tubes, which are widely used in the production and processing. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufactur

42CrMo alloy steel seamless pipe   has good permeability, high toughness and hardness. The production process of them are hot rolling process, cold drawing process and finishing rolling process. Hot rolling process: round steel material inspection - round steel cutting - round steel heating - round steel perforation - sizing - room temperature cooling - straightening - cutting ends - quality inspection - spray marking and delivery Cold drawing process: round steel perforation - pickling - cold drawing processing - quality inspection - delivery Finishing rolling process: round steel piercing - pickling - rolling mill finishing - cutting ends - quality inspection - delivery The three production processes of seamless steel pipes have their own advantages, you can choose the right production processes for your demand. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufact

High-pressure boiler tubes   are used in a high-temperature and high-pressure environment, so the material selection is strict and its process is similar to the ordinarty seamless pipe. They are widely used as boiler superheater, gas duct, steam pipe, etc. The materials of high-pressure boiler tubes is 20G carbon steel and high-pressure alloy boiler tubes. Corresponding materials can be selected according to the working environments. National standard of boiler tube is GB/T3087-2008 low and medium pressure boiler tubes and GB/T5310-2008 high pressure boiler tubes. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.

LSAW steel pipe  is widely used in our life, so do you know the difference between cold rolling and hot rolling in LSAW steel pipe?   Cold rolling is processed from hot-rolled sheets at room temperature. Generally speaking, it is process is hot-rolling-pickling--phosphating--saponification--cold rolling.   Hot rolling is hot working process. Hot rolling has many advantages such as high production efficiency, large scale, low energy consumption, low cost, high degree of mechanization and automation, so it is suitable for large-scale production. The difference between cold rolling and hot rolling LSAW steel pipe: 1. Cold-rolled section steel allows local buckling of the section, so that the bearing capacity of the member after buckling can be fully utilized, while hot-rolled section steel does not allow local buckling of the section. 2. The reasons for the residual stress of hot-rolled steel and cold-rolled steel are different, so the distribution on the cross-section is also very differ