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Oil spiral welded pipe
Oil spiral welded pipe does not belong to the general metallurgical products, but in the seamless pipe, bars or plates on the basis of after deep processing (pressure processing, welding, machining, heat treatment, surface treatment, etc.), actually belong to mechanical product areas. In order to...Read more -
LSAW and galvanized steel pipe welding process
In pipeline construction, oil pipeline and gas pipeline is transported toward the large diameter high pressure and the development of submarine pipeline thick direction more and more pipelines require the use of LSAW steel pipe. With the introduction of of several large-seam submerged arc welded ...Read more -
Large diameter square tube defects
Many large diameter square tube defects are caused by the perforation in square and rectangular tube, so the mass production of large diameter power process is the key process square tube. Perforation main difficulty lies in the low alloy high performance perforation, when necessary in order to e...Read more -
How to prevent heat deformation of straight seam steel pipe problem
How to prevent heat deformation of straight seam steel pipe problem Fine messy mold deformation reason is often messy, but we need to grasp its variation rules, analyze the reasons of its occurrence, the choice of a strange approach to prevent deformation of the mold can be cut, but also can be m...Read more -
High Pressure Steel Pipe
High-pressure steel pipe manufacturing methods are divided into hot-rolled (extrusion, expansion) and cold drawn (rolled) two kinds. Among them, the hot-rolled (extrusion, expansion) OD pipe is 22 ~ 530mm, wall thickness in the range of 2.0 ~ 70mm; cold drawn (rolled) pipe diameter ranges from 10...Read more -
Mechanical properties of seamless steel tubes
The mechanical properties of the seamless steel tube is a important indicator that ensure seamless pipe end-use properties (mechanical properties), which depends on the chemical composition and heat treatment of steel. In steel standards, according to different requirements, it provide the tensil...Read more -
LSAW steel pipe features let it invincible position
LSAW steel pipe features: Longitudinal production process is simple. Low interest rates, rapid development. Plastic, spiral and standard classification: pressurized fluid transport spiral submerged arc welded pipe (SY5036-83 is mainly used for transporting oil, natural gas pipelines; pressure flu...Read more -
How to Weld Large Welded Steel Pipe?
In the welding process of large welded steel pipe, we should pay great attention to the melted region of the work piece and form a molten solder, because the melted region is the connection of cooling and solidifying the material after the pool is formed. Usually, the pressure is required by larg...Read more -
How to Deal With Electrochemical Corrosion of ASTM A179 Cold Drawn Steel Pipe
(1) ASTM A179 cold drawn seamless steel pipe with carbon steel pollution: contact with carbon steel caused by scratches and corrosive media to form the original battery and electrochemical corrosion. (2) ASTM A179 cold drawn steel pipe cutting: slag, splash and other easy to rust the material at...Read more -
longitudinally welded tubes
Longitudinally welded tubes are manufactured from sheet steel drawn from a coil(hot-rolled strip usually 2.75–5 mm thick and 65–300 mm wide). The diameter is determined by the width of the sheet; the correct width is slit at the factory and then formed to create a tube. Rollers/formers shape the ...Read more -
Inspection in API 5L Pipe
Api 5L pipe corrosion is mainly for wall thinning, pitting rot point pit stress cracks. Pipe detection is the application of various technologies truly and records, including basic dimensions (pipe wall thickness and diameter) pipeline straightness road internal and external corrosion in pipeline...Read more -
How solution treatment for stainless steel seamless pipe
For stainless steel seamless pipe, the three elements of the solution treatment temperature, holding time and cooling rate. Stainless steel seamless solution treatment effect is as follows: 1: Make stainless steel seamless organization and composition uniform, which is particularly important for ...Read more