Medium carbon steel refers to carbon steel with carbon content of 0.25% – 0.60%, including 30, 35, 45, 50, 55 in high-quality carbon structure and zg230-450, zg270-500, ZG310-570 and zg340-640 in cast carbon steel. Because the carbon content of medium carbon steel is higher than that of low carbon steel, its weldability is worse than

In order to improve the corrosion resistance and decoration of large stainless steel flanges, it is necessary to polish the stainless steel surface. Now, there are three polishing and electrochemical polishing technologies, including mechanics, mechanics and chemistry. Because of the use of phosphoric acid and chromic anhydride in the existing stainless steel electropolishing liquid, many chromium (VI)

The basic process of carbon steel elbow forming is: first, weld a polygonal ring shell or a polygonal fan-shaped shell with both ends closed. After the internal pressure is filled with pressure medium, the cross-section gradually changes from polygon to circle and finally becomes a circular ring shell. Other names: 90 ° elbow, right angle bend, Aier

How to use flanges? Can flange be welded? With the continuous improvement of the authoritative way of selecting flanges, it is gradually convenient to know the price of the whole flange and how to weld the flange. We know that the comparison of the two ways of butt welding fittings and flat welding flange has been gradually

Stainless steel flange is also called flange or flange. The flange is the part that makes the pipe and the pipe connect with each other, and is connected to the pipe end. There are holes in the flange, and the bolts make the two flanges tightly connected. The stainless steel flange connection is easy to use

Production processes are mainly divided into forging, casting, cutting and rolling. The cast flange has accurate blank shape and size, small processing capacity and low cost, but there are casting defects (pores, cracks and inclusions); The internal organization streamline of the casting is poor (if it is a cutting part, the streamline is even worse);

Marking, packaging, transportation and storage 1) Signs The rubber joints shall at least have the following permanent marks: manufacturer name, product name, product specification, model and working pressure. 2) Packaging Packaging shall be carried out according to the agreement between the supplier and the buyer. A valid product certificate shall be attached to the package,

Wedge gate valve can bear high pressure because its sealing surface is at an angle to the vertical centerline and has good sealing. Generally, the valve stem of wedge gate valve is subject to quenching and tempering and surface nitriding treatment, which has good corrosion resistance and scratch resistance; The gate and valve seat seal

Body: Ductile iron GGG40/GGG50 Disc: Ductile iron+EPDM/NBR Stem: Stainless steel Size: DN40-DN600 The opening and closing part of the wedge gate valve is the gate, and the movement direction of the gate is perpendicular to the fluid direction. The wedge gate valve can only be fully opened and fully closed, and is not suitable for

Different from parallel gate valves, wedge gate valves also have wedge single gate valves. The two sealing surfaces of the most commonly used wedge gate valve form a wedge, and the wedge angle varies with the valve parameters, usually 50. The gate of wedge gate valve can be made into a whole, which is called