The Flat Face Flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting.
Flat face flanges are never to be bolted to a Raised Face Flange. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon Steel Flange must be removed, and that a full face gasket is required. This is to keep the thin, bittle cast iron flange from being sprung into the gap caused by the raised face of the carbon steel flange.
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The gantry crane installation is installed for special equipment. The project is a very risky project. Due to its high working height, the main beam is up to 66 meters; the lifting weight is large, including the main beam, rigid legs, flexible legs and other components, and the lifting installation weight is about 1200 tons. Any minor negligence during construction can have unimaginable serious consequences.
In order to ensure the safety of construction, the gantry crane project department has repeatedly calculated and demonstrated, optimized and improved the safety technology program, adopted a number of safety measures, and implemented a strict safety management system. In this construction, the welding quality of key parts such as lifting lugs and rigid legs is decisive for the safety of personnel and equipment. To this end, the company not only compiled a strict and thorough welding program, but also specially selected welding technology experts and the best welders from Shanghai to carry out careful welding to ensure that the weld quality reached two 100%: “100% of the flaw detection filming, The first grade weld is 100%". To lay a solid foundation for the safety and quality of the project.
China Metallurgical Baoye Nantong 200-ton gantry crane installation project successfully completed a test run
Recently, China Metallurgical Construction Co., Ltd. completed the completion of the installation of a 200-ton gantry crane of Nantong COSCO Shipping Company. After three months of hard work, under the condition of 25% overweight, the gantry crane was successfully tested.