API 650 unanchored flat-bottom tank external loads

The hardness of the welds contacting these environments, including the heat-affected zones, shall be considered. The weld metal and adjacent heat-affected zone often contain a zone of hardness that is well in excess of a value of 22 on the Rockwell C scale and could be expected to be more susceptible to cracking than would unwelded metal. Any hardness criteria shall be a matter of agreement between the Purchaser and the API 650 unanchored flat-bottom tank manufacturer and shall be based on an evaluation of the expected hydrogen sulfide concentration in the product, the possibility of moisture being present on the inside metal surface, and the strength and hardness characteristics of base metal and weld metal.The API 650 tank Standard has the built in flexibility to be used in building tanks to store a wide variety of products while ensuring the structural stability of the API 650 unanchored flat-bottom tank tank.FANALCA (which is most big Motorcycle factory in Columbia ) ,And FANALCA is Japan Honda's only distributor in Colombia, they have visit our company in 2017 ,and they have purchase our SAPH370,SAPH440 coil 80-100 tons every month. They are very satisfied with our company's product Gallery, and give a high evaluation and affirmation to our company's professionalism and after-sales service system.In order to prevent the deformation of the bottom of metal vertical storage tank, API 650 unanchored flat-bottom tank during welding, the number of welders should be reasonably distributed. When welding metal vertical API 650 unanchored flat-bottom tank, personnel and welding position shall be reasonably allocated according to the actual situation of welding personnel, and random welding is not allowed.The after-sales service personnel understand the user's ideas and needs in detail, and stand on the other side's position and interests. Actively communicate with users and help them solve practical problems. This not only solves the service problem, but also improves the customer's trust in the company.