How To Make Shrimp Bends In Stainless Steel Pipe Fittings

Manual lofting steps: (Take one section as an example, the rest of the methods are the same)

1) First draw the side projection of the elbow according to the actual size. Including the seam line.

2) Divide each closed wireframe figure into independent figures according to the line. (You can cut it or draw it separately.

3) Take a pattern and draw it on another piece of paper (set the center line vertically). Draw two horizontal lines parallel to each other along the height of the pattern, and perpendicular to the center line. The length
is exactly the circumference of the diameter of the pattern. (Closed rectangle)

4) Divide the pattern vertically and mark it, then draw these equal division lines vertically into the expanded rectangle just drawn. Note that the points on the expanded drawing must correspond to the points on the projected drawing.

5) Divide the oblique lines on the pattern horizontally. Pull them parallel to the expanded pattern and correspond to the corresponding points. Smoothly connect the intersection points obtained on the expanded pattern to form the expanded curve. The denser the division, the more accurate the curve.
6) Release the amount of bite and plate thickness processing.
The bending radius, thickness, and number of sections must be known when cutting elbows.

The method of Stainless Steel Weld Elbow is very common, and the cutting and manufacturing is very simple, but the traditional method is difficult to operate for large-diameter elbows in the current industry, and it is difficult to ensure accuracy. Now, computer drawing can be used to calculate the length of the plain line at each point, and then the coiled pipe is divided into the same number of equal parts, and the line segment is intercepted on the plain line with the calculated length. The cutting line can be drawn by connecting the end points. Wall thickness processing method: When laying out, first draw the theoretical cutting line, and then determine the position of the cutting line of the highest and lowest points (after the groove is opened) according to the wall thickness. After connecting the two points, calculate the length of the plain line of each equally divided point, cut the line on the coiled pipe, and after the combination, the required angle can be guaranteed. The national standard is S02403 steel pipe fittings construction standard. The material is generally carbon steel, stainless steel and alloy steel. In daily construction, shrimp elbows are less used than elbows welded with original pipes and middle plates. Shrimp elbows seem complicated, but they are actually simple, because they are actually a circular cone with different heads that is beveled several times, and then the sections are twisted 90 degrees and spliced ​​together. It is made in the same way as multi-section equal-diameter elbows, with the only difference being that equal-diameter elbows are beveled with straight pipes, while shrimp elbows are beveled with circular cones.