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What are the heat treatment characteristics of martensitic stainless steel pipes
Answer: Martensitic stainless steel pipes include Cr13 type (low carbon and medium carbon), Cr17Ni type (low carbon), and Cr18 type (high carbon). The heat treatment process includes annealing, quenching + tempering, stress relief, etc. (1) Cr13 stainless steel pipe: Alloys with Cr ≥ 12% have the...Read more -
What are the precautions for welding steel pipes
Welding steel pipe is a common process that plays an important role in the construction, manufacturing, and repair fields. However, when performing welding operations, we need to pay attention to some key things to ensure welding quality and safety. First of all, the preparation before welding th...Read more -
Explore the method of measuring the bending of steel pipes
Seamless steel pipes, straight seam welded steel pipes, forged steel pipes, precision steel pipes, high-precision precision steel pipes, and other steel pipes will cause different degrees of curves in the longitudinal direction (i.e. length direction) of the steel pipe body during the production ...Read more -
How to choose a large diameter 42crmo thick wall seamless steel pipe
42CrMo thick-walled seamless steel pipe is a commonly used steel pipe material, widely used in petroleum, chemical, electric power, aviation, aerospace, and other industries. When choosing 42CrMo thick-walled seamless steel pipe, you need to consider the following key factors. First, consider the...Read more -
Not all post-weld heat treatments for steel pipes are beneficial
Welding residual stress is caused by the uneven temperature distribution of the weldment caused by welding, the thermal expansion and contraction of the weld metal, etc., so residual stress will inevitably occur with the welding construction. The most common method to eliminate residual stress is...Read more -
The main reasons for choosing spiral steel pipe are as follows
1. Quality assurance: The production of spiral steel pipes strictly adheres to national standards, ensuring reliable quality. At the same time, strict quality control is implemented in every link of its production process, further improving the quality and reliability of the pipeline. 2. Superior...Read more -
Detailed explanation of usage matters and flow characteristics in the installation guide for large-diameter plastic-coated steel pipes for water supply
First, the flow characteristics of large-diameter plastic-coated steel pipes for water supply: 1. When fluid passes through a plastic-coated steel pipe, the fluid flows faster in the pipe because the inner wall of the pipe is smooth and the friction resistance is small. 2. The cross-sectional are...Read more -
Examples, characteristics, and causes of steel pipe defects and defects
Surface indentation characteristics: The outer surface of the steel pipe is a spiral-shaped indentation. cause: 1) The angle of the straightening machine roller is improperly adjusted and the reduction amount is too large. 2) The straightening roller is seriously worn, etc. Cause: The roller stic...Read more -
Precautions for storage of galvanized steel pipes and methods for dealing with alkali reversion
First: Causes of anti-alkali (white rust, black spots) 1. The formation principle of white rust: When galvanized products are tightly packed and placed in humid air since there is no free-flowing air on the surface of the product, electrochemical corrosion will occur on the surface of the zinc la...Read more -
Do you know these eight things about seamless steel pipes
(1) The wall thickness coverage of seamless steel pipes is relatively wide and can achieve small diameters and large wall thicknesses and large diameters and large wall thicknesses, but the length is generally limited (only a few manufacturers can produce ultra-long pipes); stainless steel welded...Read more -
Explore the details of the tensile strength of industrial small-diameter seamless steel pipes
The tensile strength (Rm) of small-diameter seamless steel pipe refers to the maximum stress value the material withstands before breaking. When the small-diameter seamless steel pipe yields to a certain extent, its ability to resist deformation increases again due to the rearrangement of the int...Read more -
Construction preparation before welding of large-diameter steel pipes and introduction to inner wall anti-corrosion
Construction preparation before large-diameter steel pipe welding: 1. Organize relevant operators, familiarize themselves with construction drawings and procedures, formulate welding procedures, and compile welding operation instructions. 2. Welders should be trained in corresponding projects and...Read more
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