A334 grade 6 pipe API Std 650 closed top welded storage tanks

All API Std 650 closed top welded storage tanks fillet welds shall consist of a minimum of two passes. The ends of the fillet welds shall be 2 in. from the rat hole, and these welds shall be deposited by starting 2 in. from the rat hole and welding away from the rat hole. An acceptable alternative to stopping fillet welds 2 in. short of the rat hole would be to weld continuously through the rat hole from one side of the stiffener to the opposite side. All craters in fillet welds shall be repaired by back welding.In Appendix E to API 650 oil storage tank, the maximum values of inertia force, pulse pressure and convection pressure are superimposed, and tend to be conservative.In GB50341, only pulse pressure is calculated for API Std 650 closed top welded storage tanks tanks below 5000 m.LSAW Pipe to Peru. In the beginning of 2014, Peru government released an international tender for one of the hydroelectric power plant. Finally they chose us as the contractor, we purchased the steel plate and then fabricate the API Std 650 closed top welded storage tanks steel plate into steel pipe, and then make the corrosion protect on the surface, we also supply the fitting with our steel plate, the total value of this order is about 2 million USD.The water dissolved in the oil will be separated out from the oil stored in the API Std 650 closed top welded storage tanks for a long time, and the acidic water layer will appear at the bottom of the API Std 650 closed top welded storage tanks for a long time, which will accelerate the corrosion of the API Std 650 closed top welded storage tanks and cause the wall thinning and even leakage. With the increase of service life, the API Std 650 closed top welded storage tanks must be inspected and cleaned regularly to check the hidden danger.If customers have any difficult problems during use of the steel materials, they can contact the company's after-sales service department to feedback the existing problems. The after-sales department will reply as soon as possible to ensure that each customer has a good after-sales experience. Under special circumstances, the after-sales service department will start the problem-solving process, and the engineers in charge of the area will quickly follow up to solve the problem.