ASTM A182 F51 is an American standard stainless steel material. It is a Ferrite-Austenitic stainless steel. The ideal metallographic structure of duplex stainless steels is 50% ferrite and 50% austenite respectively. Generally, the minimum phase content should reach 30%. It has the advantages of both austenitic stainless steels and ferritic stainless steels. Austenitic stainless steels have no or weak magnetic field, while duplex steels are magnetic. Duplex stainless steel is characterized by both stainless steel and carbon steel. It combines the beneficial properties of ferrite and austenite, has good resistance to chloride ion stress corrosion and sulfide stress corrosion as well as high mechanical strength.

Slip On Flange is a flange that extend steel pipes, fittings, etc. into flanges and connect to equipment or pipes through fillet welds. Inserting steel pipes or fittings into flanges connected to equipment or pipes by fillet welds. It can be used in pipes with higher pressures because short necks increase the strength of the flanges and improve the bearing capacity of the flanges. Slip On Flange is a part of connect pipes to pipes. There are holes in the flange. Bolts connect the two flanges tightly. Flange connection refers to the removable connection composed of flanges, gaskets and bolts, which are connected together as a group of combined sealing structures. Pipe flange refers to the flange for distribution piping in the piping device. For equipment, it refers to the inlet and outlet flanges of equipment, and the flanges are sealed with gaskets.

Butt Welded Cap is a device used to close pipelines and pipelines. Its main function is to prevent the leakage of fluid or gas in the pipelines and to protect the pipelines from the external environment.Butt Welded Cap is the top and bottom of the pressure vessel or the end of the pipe. If you are not ready to extend any further, then seal the pipe by welding it with a cap. The cap can not be removed after welding. The quality of the cap is directly related to the long-term safe and reliable operation of the pressure vessel.

Butt Welded Reducer is one of the pipe fittings used to connect two pipes of different diameters. ASME B16.9 Butt Welded Reducer is divided into two types: concentric reducer (that is, the central axes of the big end and the small end coincide) and eccentric reducer (that is, one outer wall of the big end and the small end is in a straight line).

ASME generally refers to the American Society of Mechanical Engineers, ASME B16.11 is a standard recommended by the American Society of Mechanical Engineering covering socket welding and threaded parts, and is also a relatively authoritative and widely used recommended standard in the world.

Galvanized steel pipe is the steel pipe after galvanized processing process, effectively avoid steel corrosion, rust a for prolong the service life of steel pipe. Galvanized steel pipes are divided into hot galvanized and electrogalvanizing.