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Factors affecting the accuracy and resolution of the oil casing wall thickness detection
API standards stipulate that the inner and outer surfaces of import and export oil casings shall not have folds, separations, cracks, or scars. These defects should be thoroughly removed, and the removal depth should not be less than 12.5% of the nominal wall thickness. Oil casing must be fully...Read more -
How to prevent precision stainless steel pipe fittings from rusting
1. Do not come into contact with other metals, because stainless steel pipe fittings will be rusted by dissimilar metals, such as screws, etc. Although it is not serious at first, if you wipe it with a cloth and neutral detergent, the rust will be visible. 2. Another factor that causes stainless ...Read more -
Brief analysis of the processing methods of industrial steel pipes
First, the processing and loading of steel pipes: 1. During the heat treatment process, workpieces that are easy to deform should be heated on a special fixture 2. The workpiece should be placed in the effective heating zone Second, preheating: 1. For workpieces with complex shapes or sharp chang...Read more -
What is the difference between the industrial project straight seam steel pipe and seamless steel pipe
First, different classifications 1. Straight seam steel pipe: divided into metric electric welded steel pipe, electric welded thin-walled pipe, transformer cooling oil pipe 2. Seamless steel pipe: seamless pipe is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, top...Read more -
Common defects in the welding area of spiral seam submerged arc welding steel pipe
Defects that are prone to occur in the submerged arc welding area include pores, thermal cracks, and undercuts. 1. Bubbles. Bubbles often occur in the center of the weld. The main reason is that hydrogen is still hidden in the welded metal in the form of bubbles. Therefore, the measures to elimin...Read more -
What is the stress state of the industrial spiral steel pipe during extrusion
(1) During the extrusion process, the temperature of the inner lining of the spiral steel pipe continues to rise as the extrusion process progresses. At the end of the extrusion, the temperature of the inner wall of the lining near the extrusion die is high, reaching 631°C. The temperature of the...Read more