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Details of SA335 P92 alloy steel pipes commonly used in industry
ASME SA335 P92 seamless steel pipe is a high-performance alloy steel pipe widely used in petroleum, chemical, electric power, boiler, and other fields. Its excellent high temperature resistance, high-pressure resistance, strong corrosion resistance, and other characteristics enable it to maintain...Read more -
Methods for cleaning the inner wall of carbon steel pipes
In the steel industry, carbon steel pipes are important transmission media, and the cleanliness of their inner walls directly affects the transmission efficiency and service life of the fluid. First, mechanical cleaning method Mechanical cleaning is a more traditional and direct method, which mai...Read more -
Why do steel pipes need to be heat-treated
According to the different purposes of heat treatment, heat treatment processes can be divided into two categories: preliminary heat treatment and final heat treatment. 1. Preliminary heat treatment The purpose of preliminary heat treatment is to improve processing performance, eliminate internal...Read more -
The formation process and characteristics of tempered troostite in steel pipes
1. What is tempered troostite in steel pipes Troustite can be divided into quenched troostite and tempered troostite. For example, in the normal martensite quenching process, quenched troostite is formed in the troostite transformation zone due to the slow cooling rate. Another case is to first q...Read more -
The thickness of the same batch of 304 stainless steel strips is inconsistent because of these reasons
1. The influence of temperature change: Once the temperature of metallurgical spare parts changes, it will affect the production conditions of steel rolling equipment, thereby driving the thickness of the stainless steel strip to change. Its essence is that the temperature difference causes the t...Read more -
What is the reason for the cracking of cold-drawn seamless steel pipes produced
1. Raw material selection To save costs, some seamless steel pipe manufacturers will choose round steel produced by small steel mills for processing, but the round steel produced by these small steel mills will contain many impurities, bubbles, interlayers, pores, etc., which are easy to cause cr...Read more -
Advantages and application analysis of spiral welded steel pipe DN400
Spiral welded steel pipe is a common pipeline manufacturing process, where DN400 refers to the nominal diameter of the pipe as 400 mm. This type of steel pipe has a wide range of applications in engineering and construction. Next, we will delve into the advantages of spiral welded steel pipe DN40...Read more -
Analysis of the Causes of Surface Cracks on Small-Diameter Seamless Stainless Steel Pipes
Observing the crack morphology, the cracks extend obliquely at an angle of 45° to the inner wall. Since the pipe itself has good mechanical properties and high ductility, it can be ruled out that it is caused by cold rolling. The crack width develops from coarse to fine, and a bifurcation appears...Read more -
Classification and anti-corrosion of oil casing
Oil casing can be roughly divided into the following categories according to different usage methods: 1. Surface casing. 2. Intermediate casing. 3. Production casing. 4. Drilling casing. Surface casing mainly refers to hanging and supporting subsequent layers of the casing through the casing head...Read more -
Five carburizing defects and prevention methods of heat treatment of steel pipes
1. Too high carbon concentration A. Causes and hazards If the carburizing is heated sharply, the temperature is too high, or a new carburizing agent is used during solid carburizing, or too much strong catalytic agent is used, the carburizing concentration will be too high. With the high carbon c...Read more -
Quality problems in the production process of seamless steel pipes – quality defects in steel pipe sizing (reduction) and their prevention
The purpose of steel pipe sizing (reduction) is to size (reduce) the rough pipe with a larger diameter to the finished steel pipe with a smaller diameter and to ensure that the outer diameter and wall thickness of the steel pipe and their deviations meet the relevant technical requirements. The q...Read more -
Uneven thickness of anti-corrosion coating on spiral steel pipe and its treatment
Spiral steel pipe is mainly used as fluid pipe and piling pipe. After the steel pipe is made, if it is used for water transportation, it will generally be treated with anti-corrosion on the inner or outer surface. The general anti-corrosion includes 3PE anti-corrosion, epoxy coal tar anti-corrosi...Read more