Stainless steel pipe flange manufacturers believe that flange connection is an important connection in pipeline construction. According to the fixing method of flange and pipe, the type of flange can be divided into threaded flange, welding flange and loose sleeve flange; according to the form of sealing surface, it can be divided into smooth type, concave-convex type, tongue-and-groove type, lens type and trapezoidal groove type. General low-pressure small-diameter threaded connection flange, high-pressure low-pressure large-diameter welding flange. The flange thickness and the diameter and number of connecting bolts are different for different pressures.

Stainless steel special material pipe flange manufacturers believe that according to the different pressure levels, flange pad material is also different, from low pressure asbestos pad, high pressure asbestos pad, PTFE pad to metal pad. Flange connection is easy to use, can withstand greater pressure. In industrial pipelines, flange connections are widely used, such as butterfly valves, gate valves, check valves and other valves connected to pipelines in indoor fire hydrant water supply systems.

Stainless steel special material pipe flange manufacturers believe that the main characteristics of flange connection are easy disassembly, high strength and good sealing performance. When installing the flange, it is required that the two flanges are parallel, and the flange sealing surface shall not be damaged and cleaned. The flange gasket shall be selected according to the design. Check whether the specifications of flanges, bolts and gaskets meet the requirements through the connection method. The sealing surface shall be smooth and clean without burrs.

The threads of the bolts shall be complete and free from defects, and the embedment shall be natural. The gasket shall be flexible and not easy to age, and the surface shall be free of defects such as damage, wrinkles and scratches. Before assembling the flange, clean the flange, remove oil, dust, rust and other sundries, and remove the sealing line. The sealing surface of the assembly flange is perpendicular to the center of the pipe. The bolts of the same specification are installed in the same direction.

Stainless steel special material pipe flange manufacturers believe that the use of standard carbon steel flange characteristics and maintenance can be said to be very important. There are many precautions in the use and maintenance of standard carbon steel flanges. Users must use them in a certain way, and use and maintain them in an accurate and fair way. Notes are as follows:

　　1. The bolts of the standard carbon steel flange valve packing gland should be tightened evenly and should not be pressed into a bent state to avoid bumping, hindering the movement of the valve stem or causing leakage.

　　2. Stainless steel pipe flange manufacturers believe that long-term storage of standard carbon steel flange should be regularly checked, the exposed surface should always be kept clean, remove dirt, and neatly stored in a ventilated and dry place indoors. Stacking or open storage is strictly prohibited. Always keep the stainless steel flange dry and ventilated, keep the holder clean and tidy, and store according to the accurate storage method.

　　3. Standard carbon steel flanges should be handwheels to prevent levers or other tools from damaging valve parts. Turn the handwheel clockwise to close, otherwise open. Fair use, to ensure the use of methods and means accurate.

4. Stainless steel special material pipe flange manufacturers believe that when installing, the standard carbon steel flange can be directly installed on the pipeline according to the connection method, and installed according to the use position. Generally, it can be installed in any position of the pipeline, but it needs to be easy to check the operation. Note that the medium flow direction of the stainless steel flange should be below and upward of the longitudinal disc, and the stainless steel flange can only be installed horizontally. When installing stainless steel flanges, pay attention to the tightness to avoid leakage and affect the normal operation of the pipeline.

5. Stainless steel special material pipe flange manufacturers believe that ball valves, globe valves and gate valves with standard carbon steel flanges can only be fully opened or fully closed when in use, and are not allowed to be used to adjust the flow, so as not to corrode the sealing surface and accelerate wear. The gate valve and the upper threaded stop valve are equipped with an inverted sealing device, and the handwheel is screwed to a high position to prevent the medium from leaking from the packing.