The basic process of carbon steel elbow: the test selected from the double curvature of the mandrel. Elbow pipe (flange fitting) refers to pipe and bending (flange or disk access). Tighten the nut on the sealing surface between the two elbows of the washer, and the pressure on the surface of the washer will reach a certain value, and the uneven sealing surface will be filled so that the connection will not leak tight.
Carbon steel flanges are people who work according to the actual project. In actual use, we have made the insulation performance of carbon steel flanges in accordance with the "Technical Requirements for Steel Flange Design" (SY/T--) and require " In the relevant test method "Test Method for Cathodic Protection Parameters of Buried Steel Pipeline" (SYJ-), in accordance with the principle and appropriate method, the test results show that the insulation resistance value of the sheath is between the fastening bolt and the insulating liner. Surface to meet regulatory requirements.
The basic process of the carbon steel elbow: the first welding polygo部分横截面或polygonal ring. The two shell shells close the polygonal boundary, and the internal pressure of the medium is filled. The polygonal cross-section that exerts the effect of internal pressure gradually becomes the internal pressure Round, ending in a circular shell. The stamping processability is greater and more complex shape parts, such as small clocks and stopwatches, large car door sills, covers, etc. size range. The starting point from the elbow to the interface is not smaller than the diameter and not smaller than MM. The flanged pipe member, which has excellent strength, thermal welding and mechanical connection, is better than PB-PP-R in thermal conductivity. China adjusted the stainless steel stamping elbow of some commodities to a% export tax rebate rate.
The circular cross-section can withstand internal or external radial pressure. The force is uniform. Therefore, most steel pipes are round pipes. Maximum value, smooth application of welding flanges for relatively mild conditioned medium, low-pressure non-purified air, low-pressure circulating water, it has the advantage of low price.