Method for producing seamless steel pipes used for large-diameter high-pressure gas cylinders
A technology for high-pressure gas cylinders and seamless steel pipes, which is applied in the field of seamless steel pipe manufacturing, can solve the problems of low output, high production cost, poor external surface quality, etc., and achieves the effects of large output, low cost and simple method.
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[0033] 1. Specifications and steel types required for production, that is, the types of steel pipes prepared according to the embodiment of the present invention, the specific indicators are shown in Table 1.
[0034] Table 1
[0035]
[0036] Note: The steel grade is 4130 in the ASTM A519 standard.
[0037] Nominal Wall Thickness: Designated for design, this use is distinguished from actual wall thickness, which may fluctuate above and below the nominal.
[0038] Minimum Wall Thickness: Specifies the minimum wall thickness used for design, this usage is to be distinguished from the actual wall thickness, which may fluctuate above the minimum wall thickness.
[0039] Usually users can order in one of the two forms of nominal wall thickness or minimum wall thickness.
[0040] 2. Production process:
[0041] (1) Length measurement, weighing and sawing of circular continuous casting slabs smelted by LF refining furnace + VD vacuum treatment; see Table 2.
[0042] Table 2 ...
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