The welding of stainless steel pipe, have brittle tendency of martensitic chromium stainless steel Welding Electrode, grain of ferritic chromium stainless steel in high temperature welding is easy to grow up, these have to weld a higher brittleness. Chrome-nickel stainless steel weldability is good, but the welding current prone welded joints to intergranular corrosion, weld hot cracking, the welding stress and deformation increased.1,304 stainless steel pipe welding rod is usually titanium calcium and low-hydrogen type. Welding current as possible with DC power supply, will help to overcome the welding rod red and melt depth. Titanium calcium type skin electrode is not suitable for all position welding, suitable only for welding flat fillet welding of peace; low hydrogen type electrode of the drug skin all-position Welding Wire.2, stainless steel electrode in use should be kept dry. In order to prevent the generation of cracks, pits, holes and other defects, the welding of titanium calcium type skin drying 1h 150-250 ℃, low hydrogen type coating before welding by 200-300 ° C drying 1h. Not be repeated drying and otherwise drug leather is easy to fall off.3, the weld clean-up clean, and also to prevent the electrode coated with oil and other dirt, so as not to increase the weld carbon content, and influence the quality of welding.4, in order to prevent heating arising from intergranular corrosion, welding current is not too large, should generally be about 20% lower than the carbon steel electrode, the arc is not too long, rapid cooling layer welding is appropriate to the narrow channel.5 arc note that arc not in the non-welded parts, the best selection of arc welding pieces of the same material board arc.6, should be short-arc welding, the arc length is generally 2-3mm arc too long and easy to hot cracking.7, transport: should short-arc fast welding, generally does not allow lateral swing, which aims to reduce the width of the 304 stainless steel pipe welding heat and heat-affected zone, weld resistance to intergranular corrosion and reduce the tendency of hot cracking.8, dissimilar steels should be careful selection of welding rod, to prevent improper electrode selection of hot cracking or high temperature heat treatment caused by the σ phase precipitation, metal embrittlement. Reference to the 304 stainless steel and dissimilar steel welding rod selection criteria to choose from, and take appropriate welding process.