How to clean stainless steel elbow properly?

TIME：2019-05-25

The correct cleaning of stainless steel elbow can improve the safety performance and prolong its use cycle.

Electrode should be kept dry, when using titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should be 1 hour after the 200-250 ℃ drying (can't repeat drying, otherwise coated easy cracking flake), to prevent the covering viscous oil and other dirt, lest cause weld increased carbon content and affects the quality of weldment. When the elbow is welded, it is reheated and precipitated out of carbide to reduce corrosion resistance and mechanical properties. After welding, it is more rigid and prone to crack.

If using the same type of electrode welding, must be above 300 ℃ preheat and 700 ℃ or so slow cooling after welding. Chromium nickel stainless steel electrode should be used if the welding parts cannot be treated after welding.

Installation instructions for stainless steel elbow:

1, stainless steel elbow before installation, must be carefully checked each standard stainless steel elbow, size is in line with the use requirement, eliminate the defects caused by the transportation process, and eliminate the dirt of the stainless steel elbow, ready to before the installation, everything is ready.

2. When installing, the stainless steel elbow can be directly connected to the pipe on the tube, and installed according to the location used. In general, can be installed on the pipeline at any position, but need to facilitate the maintenance operation, should pay attention to the flow direction of medium by the stainless steel elbow is high, the longitudinal disc below stainless steel elbow Can only be installed horizontally. The stainless steel elbow should be sealed during installation to prevent leakage and affect the normal operation of the pipeline.

The bolts of the packing gland of the stainless steel elbow should be tightened evenly and should not be compressed into a state of tilt, so as not to hurt the stem movement or cause the leakage.

4. When the ball valve, globe valve and gate valve of stainless steel elbow are used, only open or fully closed, no regulating flow is allowed, so as to avoid erosion of the sealing surface and accelerate wear and tear. The gate valve and the upper thread globe valve have a backsealing device, and the handwheel is screwed to the top position to prevent the leakage of the medium from the filling.