First, what are the key points of the pretreatment process before polishing precision steel pipe fittings? Pretreatment is the prerequisite for ensuring the polishing effect and avoiding secondary damage. The core objective is to thoroughly remove surface impurities and repair basic defects, laying

First, what is the process principle of pickling and passivating seamless steel pipes?(1) Pickling process: Pickling mainly utilizes acid solutions (such as hydrochloric acid, sulfuric acid, nitric acid, etc.) to chemically react with rust, oxide scale, and other impurities on the surface of seamles

First, the welding of stainless steel pipes(1) Argon arc weldingStainless steel pipes require deep penetration, no oxide inclusions, and a minimal heat-affected zone. Argon arc welding with tungsten inert gas protection has good adaptability, high welding quality, and good penetration performance. I

NACE MR0175 is not a specific seamless steel pipe material, but rather a standard developed by the National Association of Corrosion Engineers (NACE), officially titled "Sulfide Stress Crack Resistance Metallic Materials for Oilfield Equipment." In 2003, this standard was revised and renamed NACE MR