Due to its very large caliber, Large OD elbow is mainly used for the connection of various large-scale transportation ribs, and is usually used at the construction interface of the pipeline. Large OD elbow is suitable for chemical, petroleum, electric power, gas transmission and other industries, especially also Suitable for high-pressure gas pipelines under low temperature conditions.

Features of Large OD elbow:

1. Large OD elbow adopts a vertical external characteristic power supply, and adopts positive polarity when direct current (welding wire is connected to the negative electrode).
2. Generally suitable for the welding of thin plates below 6mm, with the characteristics of beautiful welding seam shape and small welding deformation.
3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50~50A, the argon flow is 8~0L/min, when the current is 50~250A, the argon flow is 2~5L/min.
4. The protruding length of the tungsten electrode from the gas nozzle is preferably 4~5mm. It is 2~3mm in places with poor shielding properties such as fillet welding, and 5~6mm in places with deep grooves. The distance from the nozzle to the work is generally not More than 5mm.
5.In order to prevent the appearance of welding pores, if there is rust, oil stains, etc., the welding parts must be cleaned up.
6.Large OD elbow welding arc length.