What is the material of the connecting flange and connecting bolt on the pneumatic ball valve of the waterworks. Generally, Q235A or Q235B is the main material of steel pneumatic ball valve, but stainless steel can also be used in harsh service environment. Today, we will not focus on the material of steel pneumatic ball valve. Let's talk about the material of bolts and flanges on the pneumatic ball valve. If it is carbon steel pneumatic ball valve, 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 pneumatic 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 description of the upper flange of the pneumatic ball valve.
In fact, the flanges commonly used for pneumatic ball valves are cast flanges, cast forged flanges, and the more common pure forged flanges. The price and quality of the above Jihong flanges are different. Cut open the three types of pneumatic ball valves and look at their sections. It will be found that the cast ball valves will have sand holes, and the cast forged ones will have cracks. The forged surfaces will have uniform luster and no 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 pneumatic 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 pneumatic ball valves. Our pneumatic ball valves comply with national standards in terms of flange material and flange data. The above simply describes the type of flange material on the lower pneumatic ball valve. We have a preliminary understanding of the flange in the future purchase of pneumatic ball valves, and hope to adopt it.