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Flattening test of seamless steel pipe
The production process of seamless steel pipes is relatively cumbersome and rigorous. After the seamless steel pipe is produced, certain tests must be carried out. Do you know the flattening test method and steps of the seamless steel pipe? 1) Flatten the sample: 1. The sample is cut from any par...Read more -
Weld leveling of straight seam steel pipe
Weld leveling of straight seam steel pipe (lsaw/erw): Due to the impact of the welding current and the influence of gravity, the internal weld of the pipe will protrude, and the external weld will also sag. If these problems are used in an ordinary low-pressure fluid environment, they will not be...Read more -
Low carbon steel tubing with seamless
Features: 1. Low carbon steel tubing with seamless is a carbon steel with a carbon content of less than 0.25%. It is also called mild steel because of its low strength, low hardness and softness. 2. The annealed structure of low carbon steel tubing with seamless is ferrite and a small amount of p...Read more -
DETECTION OF SURFACE DEFECTS OF SQUARE AND RECTANGULAR TUBES
There are five main methods for detecting surface defects of square and rectangular tubes: 1. Eddy current inspection Eddy current testing includes basic eddy current testing, far-field eddy current testing, multi-frequency eddy current testing, and single-pulse eddy current testing...Read more -
Seamless elbow forming
A seamless elbow is a type of pipe used for turning a pipe. Among all the pipe fittings used in the pipeline system, the proportion is the largest, about 80%. Generally, different forming processes are selected for elbows of different material wall thicknesses. Currently. Seamless elbow forming p...Read more -
Short joint welding of oil casing
The oil casing is short joint, causing this phenomenon due to internal mechanical failures such as roller or shaft eccentricity, or excessive welding power, or other reasons. As the welding speed increases, the tube blank extrusion speed increases. This facilitates the extrusion of the liquid met...Read more -
Steel pipe dimensions & sizes chart
Steel Pipe Dimension 3 Characters: A completely description for steel pipe dimension includes outer diameter (OD), wall thickness (WT), pipe length (Normally 20 ft 6 meter, or 40 ft 12 meters). Through these characters we could calculate the pipe weight, how much pressure pipe could bear, and the...Read more -
Technical problems of heat treatment of welding seam of welded pipe
The welding process of high-frequency welded steel pipe (erw) is carried out under the condition of fast heating rate and high cooling rate. The rapid temperature change causes a certain welding stress, and the structure of the weld also changes. The structure in the welding center area along the...Read more -
The importance of non-destructive testing of seamless pipes
In the production process of seamless steel pipes, flaw detection of seamless steel pipes plays an important role, not only to detect whether the seamless steel pipes have quality defects, but also to test the appearance, size and material of the steel pipes. By applying a single non-destructive ...Read more -
Quenching and tempering treatment of seamless steel pipe
After the quenching and tempering treatment of seamless pipes, the parts produced have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. But the surface h...Read more -
What are the common uses of seamless steel tubes?
The seamless tube is formed in one piece, directly pierced from round steel, without welds on the surface, and has a wide range of applications. Because of the special processing of seamless steel tubes, carbon structural steel, low alloy structural steel, etc. are generally used for production, ...Read more -
Casing & tubing pressure rating
Casing pressure rating Out diameter mm Inner diameter mm Internal pressure strength Mpa External collapse strength Mpa Internal volume L/m 73.03 62.0 72.9 76.9 3.02 88.9 76.0 70.1 72.6 4.54 Tubing pressure rating Out diameter mm Inner diameter mm Internal pressure ...Read more