What is the material of the connecting flange and connecting bolt on the electric ball valve of the waterworks. Generally, Q235A or Q235B are the main materials of steel electric ball valves. However, stainless steel can also be used in harsh service environment. Today, we will not focus on the materials of steel electric ball valves. Let's talk about the materials of bolts and flanges on the electric ball valves. If it is carbon steel electric ball valves, The forged flanges made of carbon steel are mostly used, but the bolts are different. Many people use high-strength or stainless steel bolts. Why? Because the bolt on the electric ball valve plays a key role, the looseness or poor material of the bolt directly affects the sealing of the entire pipeline. We all know that 304 material is easy to self seal, so the customer uses 201 material or 8.8 grade bolt, 35CrMo and other materials when purchasing, which have some excellent properties such as corrosion resistance and high pressure resistance, Today we mainly talk about the material of the upper flange of the electric ball valve.
In fact, the flanges commonly used for electric ball valves include cast flanges, cast forged flanges, and the relatively common pure forged flanges. The price and quality of the above Jihong flanges are different. Cut open the three types of electric ball valves and look at their cross sections. It will be found that the cast ones will have trachoma, and the cast forged ones will have cracks. The forged surfaces will have uniform luster without any defects. The casting flange is cheap, and the difference of rough size is 1-5mm, with rough edges and burrs.
Cast flanges are also divided into cast iron and cast steel. Cast iron flanges have poor toughness, and will break when attacked by a huge force. Except for ductile iron, other flanges must be low-carbon, or problems may easily occur during welding. The expansion joint manufacturer will design, process and manufacture the electric ball valve products according to the customer's requirements, so that the products can be better used after production. Hengchang Pipeline is a powerful manufacturer of electric ball valves. The electric ball valves we produce conform to national standards in terms of flange material and flange data. The above simply describes the type of flange material on the lower electric ball valve. We have a preliminary understanding of the flange in the future purchase of electric ball valves, and we hope to adopt it.