A kind of preparation method of short anticorrosion steel pipe
A technology for anti-corrosion steel pipes and steel pipes, which is applied to the device for coating liquid on the surface, coatings, and pre-treated surfaces. It can solve the problems of excessive ellipticity of steel pipes, difficulty in producing short anti-corrosion steel pipes, and easy damage to the anti-corrosion layer. Safety and service life, improving construction quality and precision, and facilitating construction
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Embodiment 1
[0027] A preparation method of a short anti-corrosion steel pipe, comprising the steps of:
[0028] (1) Take a 12m steel pipe with a regular size, select the cutting point that divides the steel pipe into two equal parts along the length direction, and use the 200mm length range on both sides of the cutting point as the reserved range, and weld the internal welding within the reserved range Grinding the weld seam and the outer weld seam, so that the weld seam and the adjacent pipe body surface are relatively smooth transition, and the pretreated steel pipe is obtained;
[0029] (2) Heating the pretreated steel pipe so that the temperature of the outer surface of the steel pipe reaches 40°C, then use a steel pipe outer wall derusting machine to derust the outer surface of the steel pipe and perform a derusting quality inspection. Wrap kraft paper in the reserved range, the width of the kraft paper at both ends of the steel pipe (from the blunt edge of the steel pipe to the end ...
Embodiment 2
[0034] A preparation method of a short anti-corrosion steel pipe, comprising the steps of:
[0035] (1) Take a 12.3m steel pipe with a regular size, select the cutting point that divides the steel pipe into two equal parts along the length direction, and take the 230mm length range on both sides of the cutting point as the reserved range, and the inside of the reserved range will be Grind the weld seam and the outer weld seam so that the remaining weld seam height is 0.1mm (such as figure 1 shown), and a relatively smooth transition with the surface of the adjacent pipe body, the pretreated steel pipe is obtained;
[0036] (2) Heating the pretreated steel pipe so that the temperature of the outer surface of the steel pipe reaches 50° C., using a steel pipe outer wall derusting machine to derust the outer surface of the steel pipe and conduct a quality inspection of the derusting quality. Wrap kraft paper in the remaining range, the width of the kraft paper at both ends of the...
Embodiment 3
[0041] A preparation method of a short anti-corrosion steel pipe, comprising the steps of:
[0042] (1) Take a steel pipe with a regular size of 11.7m, select the cutting point that bisects the steel pipe along the length direction, and use the 250mm length range on both sides of the cutting point as the reserved range, which will be within the reserved range Grinding the weld seam and the outer weld seam, so that the height of the remaining weld seam is 0.3mm, and the transition with the adjacent pipe body surface is relatively smooth, and the pretreated steel pipe is obtained;
[0043] (2) Heating the pretreated steel pipe so that the surface temperature of the steel pipe reaches 60°C, use a steel pipe outer wall derusting machine to derust the outer surface of the steel pipe and conduct a derusting quality inspection, and then, at both ends of the steel pipe and the reserved The kraft paper is wrapped around the range, the width of the kraft paper at both ends of the steel ...
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Abstract
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