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· The characteristics of the Pipe fitting stainless steel reducer
· The forming of seamless steel pipe
· Analysis of main causes causing the decline of bend quality
· Manufacturing process of pipe tee
· Brief introduction of forged fitting
· The Stainless Steel Welding Ellipsoidal Head Pipe Cap heat treatment method
· Processing method of Seamless Steel Pipe Elbow


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Manufacturing process of pipe tee
Source :admin   Time:4/23/2018 10:06:31 PM   hit:

  The welded joints of pipe tees are on the intersecting line between the main pipe and the branch pipe, the shape and position are more complex than the butt weld, and the welding seam quality is not easy to control. According to statistics, the leakage rate of this kind of Bw Sch40 Smls Carbon Steel Pipe Tee leakage rate of all process welds. The main defects are incomplete penetration, porosity and slag inclusion.

  The weld groove on the intersecting line is mainly made by manual gas cutting or plasma cutting. The machining precision is not high, the angle of the groove is small, and the selection of welding parameters is improper. Another main reason for pipe tee quality defects is the process of material error, the outer slope of the branch pipe into the inner groove, and the branch pipe is directly connected to the head for welding. The strength of the weld is reduced by the non penetration, and the heat affected zone of the weld will be thinner with the increase of the production cycle, which leads to the leakage of the weld. The reason for producing pores and slag is that the oil, rust, moisture and other debris near the groove before welding are not cleaned up. In addition, when welding operation, the welding speed is too fast, and the welding current is too small, which accelerates the cooling rate of the weld.

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