Things To Note When Making Stainless Steel Pipe Elbows

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Things to note in the weak links of the Stainless Steel Weld Elbow production process:

1. Stainless steel stamped elbows are the weak links in the pipe system. The performance of the pipeline is mainly determined by the working capacity of the stamped elbows. The working capacity of the stamped elbows is related to the stress state in which they are located. Calculations and on-site measurements of the working stress of pipe fittings show that the arc starting point of the stamped elbow is particularly sensitive to external loads. In addition to the external loads such as internal pressure and deadweight, the main external loads are additional external loads caused by the thermal expansion of the pipe metal during the start-up process of the pipe system, the vibration of the pipe system, and the abnormal operation of the support and hanger.

2. When the arc starting section of the stainless steel stamped elbow is a butt weld, these changing external loads will cause the weld to be in a complex stress state, seriously weakening the strength of the weld, reducing the working capacity of the stamped elbow, and shortening the service life of the stamped elbow. For this reason, from a design perspective, the interface of the butt-welded stamped elbow is changed to a straight section butt, that is, the design of a stamped elbow with a straight section is conducive to the butt weld, improving the quality of the weld and the service life of the stamped elbow.

The process parameters that affect the geometric shape of stainless steel stamping elbows are: the material, wall thickness and outer diameter of the blank used for pushing, the material and shape of the mandrel head, the heating temperature and its distribution, and the pushing speed. Different factors have different effects on stamping elbows, and they need to be used in accordance with the corresponding ways and methods to determine the specific use value and function of stamping elbows in use.

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