Matters needing attention for flange use
1, In order to prevent corrosion of eye is generated due to a flange cover heating, welding current should keep shoulds not be too big, than carbon steel electrode less than 20%, arc shoulds not be too long, interlayer fast cooling, a narrow weld bead is appropriate. 2, The use of the electrode should be keep the drying, titanium calcium type should keep drying 150 DEG C for 1 hour and a low hydrogen type should be kept between 200 and 250 DEG C and dried for 1 hour, prevent electrode viscous oil and other dirt, so as not to cause the weld increase with carbon content, and the influence of welding quality. 3, Flat welding flange pipe welding by repeated heating and carbide precipitation and reduce the resistance and the mechanical properties of the corrosion properties of the product. 4, Chrome flange pipe after welding of flange American Standard hardening is large, easy to crack. If the same type of chromium stainless steel welding rod (G202, G207) welding, must be more...