Austenitic stainless steel is softened by solid solution treatment. Generally, the stainless steel tube is heated to about 950-1150°C and kept for some time, so that carbides and various alloying elements are fully and evenly dissolved in austenite, and then quickly quenched and cooled. , carbon and
1. The main feature of ordinary seamless steel pipes is that they have no welded seams and can withstand greater pressure. Products can be very rough as cast or cold drew.2. Cold-drawn precision steel pipe is a product that has appeared in recent years, mainly because the inner hole and outer wall h
1. The use of large-diameter straight seam welded steel pipes can be divided into oil well pipes (casing pipes, oil pipes and drill pipes, etc.), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic prop pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure Fertil
Routine maintenance is required when thick-walled steel pipes are used:Thick-walled steel pipes are widely used steel varieties. It directly affects the economic benefit and personnel's life. All countries in the world attach great importance to the inspection of thick-walled steel pipes and adopt v
The main technical characteristics of spiral steel pipe:During the forming process of the spiral steel pipe, the steel plate is uniformly deformed, the residual stress is small, and there is no scratch on the surface. The processed spiral steel pipe has greater flexibility in the range of diameter a
What they have in common is that they all belong to inner and outer plastic-coated steel pipes, but fire-fighting plastic-coated steel pipes are only one category of inner and outer plastic-coated steel pipes.We are already familiar with the plastic-coated composite steel pipe inside and outside. Wi
Introduction of anti-corrosion on the inner wall of large-diameter steel pipes:1. Before processing all steel pipes, the steel plate on the inner wall side of the large-diameter steel pipe shall be derusted until the metal is exposed to metallic luster (whitening). It should meet the sa2.5 standard
The length of steel pipes used for pipelines, but for the convenience of users, when the steel pipes sold at any time are reserved for production, the Q235A spiral steel pipes are produced within the specified length of the steel pipes, but when the actual order is made, the steel pipes of standard
To solve the problem of excessive misalignment in the alignment of spiral steel pipe nozzles, the following preventive measures should be taken in quality management control:1. Try to use the internal alignment device.2. Do a good job in engineering measurement and trimming when assembling.3. When t
(1) During the extrusion process, the temperature of the inner lining of the spiral steel pipe increases continuously with the extrusion process. At the end of the extrusion, the temperature of the inner wall of the inner lining near the extrusion die is higher, reaching 631 °C. The temperature of t
