Flanges can be divided into flat welding, butt welding, socket welding, loose sleeve and blind flanges. Their nominal diameters range from DN10 to DN2000+. Common international standards include ASME, DIN, and JIS, each of which has specifications for structure, size, pressure level, etc.

Under the strict production system, workers are welding large-size elbows to meet the special needs of customers.

The advantages of three-way pipe fittings after sandblasting are obvious: 

it can effectively remove surface impurities, laying the foundation for subsequent processing; forming a rough surface to enhance coating adhesion; improving surface hardness and wear resistance, extending service life; making the surface texture of the pipe fittings uniform and beautiful; at the same time eliminating stress concentration and improving structural stability.