Assembly method of positioning chock for ensuring gap at root parts butt jointing tubes in use for welding

[0029] Example one

[0030] The assembly method of the positioning plug for welding to ensure the gap between the roots of the pipe butt joint includes:

[0031] According to the pipe wall thickness δ=16mm, U-shaped groove can be used according to δ>15mm in Table 1 (see Figure 5 ), the U-shaped groove 1 is processed at the butt joint of the two pipes, the U-shaped groove 1 groove face angle β is 16°, and the root blunt edge P is 2.2mm;

[0032] The pipe is made of stainless steel, and the stainless steel of the same material as the pipe is processed into a positioning plug 2 with the same size as the U-shaped groove 1 section;

[0033] According to the larger diameter of the pipe, use four positioning plugs 2 for positioning. The four positioning plugs 2 are arranged in four equal positions along the U-shaped groove 1 on the circumference of the pipe, and the positioning plug 2 is connected to the U-shaped joint of the two pipes. The two sides of the groove 1 are fixed by tungsten a

[0035] Example two

[0036] The assembly method of the positioning plug for welding to ensure the gap between the roots of the pipe butt joint includes:

[0037] According to the pipe wall thickness δ=10mm, V-shaped groove can be used according to 3≤δ≤15m in Table 1 (see Figure 6 ), the V-shaped groove 4 is respectively processed at the butt joint of the two pipes, the angle of the V-shaped groove 4 is 60°, and the root obtuse P is 1mm;

[0038] The pipe is made of stainless steel, which is processed into a positioning plug 5 with the same size as the cross section of the V-shaped groove 4.

[0039] According to the smaller diameter of the pipe, three positioning plugs 5 are used for positioning. The three positioning plugs 5 are arranged in three equal positions along the V-shaped groove 4 of the pipe circle, and the positioning plug 5 is connected to the outer circle of the two pipe joints. Use tungsten argon arc welding spot welding to fix, the spot welding fixed weld 6 is 15mm l

[0041] Example three

[0042] The assembly method of the positioning plug for welding to ensure the gap between the roots of the pipe butt joint includes:

[0043] According to the pipe wall thickness δ=2.5mm, the I-shaped groove can be used according to δFigure 7 ), processed into I-shaped grooves 7 at the butt joint of the two pipes;

[0044] The pipe is made of copper-nickel alloy, which is made of copper-nickel alloy of the same material and processed into a positioning plug 8 with the same size as the cross section of the I-shaped groove 7;

[0045] According to the small diameter of the pipe, two positioning plugs 8 are used for positioning. The two positioning plugs 8 are arranged in two halves along the I-shaped groove 7 of the pipe circumference, and the positioning plugs 8 and the outer circle of the two pipe joints are used Tungsten argon arc welding spot welding is fixed, its spot welding fixed weld 9 is 10mm long, to ensure that the root gap b=2mm meets the requirements