Geometry Accuracy And Shape Inspection Of Seamless Steel Tube

Find here details of LSAW Steel Pipes Q345 on our website. Today we would like to talk about geometry accuracy and shape inspection of seamless steel tube.

The chemical composition of seamless steel pipe: The chemical composition of steel is one of the most important factors affecting the performance of seamless steel pipe, and it is also the main basis for formulating the process parameters of rolling mill and the heat treatment process parameters of steel pipe.

X42 Seamless Steel Pipe

SGP ERW Steel Pipe CS Supplier would like to share with you the following points.

a. alloying elements: intentionally added, depending on the use

b. Residual elements: steelmaking, proper control

c. Harmful elements: strict control (As, Sn, Sb, Bi, Pb), gas (N, H, O)

Furnace refining or electroslag remelting: Improve the uniformity of chemical composition in steel and the purity of steel, reduce non-metallic inclusions in the tube blank and improve its distribution.

A Steel pipe outer diameter accuracy: depending on the method of determining (minus) diameter, equipment operation, process system, etc.

OD tolerance δ= (D-Di) Di x100% D: Maximum or minimum outer diameter mm.

a. Di: nominal outer diameter mm

b. Seamless steel pipe wall thickness accuracy: in the heating quality of the tube blank, the process design parameters and adjustment parameters of each deformation I sequence, the quality of the tool and its slick quality

Wall thickness tolerance: p = (S-Si) / Six100% s: maximum or minimum wall thickness in cross section

Si: nominal wall thickness mm

c. Steel tube ellipticity: indicates the degree of non-circularity of the steel pipe.

d. Length of steel pipe: normal length, fixed (times) length, length tolerance

e. Steel pipe bending degree: indicates the bending degree of the steel pipe: the bending degree of the length of the steel pipe per meter, and the bending degree of the full length of the steel pipe

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