API Std 650 welded steel storage tanks supports for stiffening rings
Prefabrication requirements for API Std 650 welded steel storage tanks, large vertical storage tanks:1. The machined surface of the edge of the steel plate should be smooth, and there should be no defects such as slag inclusion, delamination, cracks, etc., and the surface hardened layer produced by the flame cutting groove should be removed.2. Dimension deviation after steel plate processing: the deviation of plate width is less than 1.5 mm, the deviation of plate length is less than 2 mm, and the difference between diagonals is less than 3 mm.
The insert plate weld shall not cross any shell seams and shall be at least the greater of 10 times the shell thickness or 12 in. from any other weld in the API Std 650 welded steel storage tanks shell including shell seams, shell-to-bottom weld or attachment welds. The butt weld around the periphery of the plate shall be examined over 100% of its length by both liquid penetrant method and radiographic method. The liquid penetrant examination is required on the root pass, on the back-gouged surface, and on the inside and outside finished weld surfaces. Additionally, the weld shall be vacuum box leak tested.
This specification, in conjunction with API 650 Standard, prescribes minimum standards for the API Std 650 welded steel storage tanks design, supply, fabrication, erection, and testing of field erected welded steel storage tanks complete with accessories as specified herein and as shown on attached Datasheets and/or Drawings.
In 2019, through the concerted cooperation of the enterprise team, the sales volume has grown steadily, and the annual sales volume has exceeded 300 million yuan. For this reason, both the investors and employees of the enterprise have received satisfactory returns. With strong development potential and brand advantages, we have always been committed to "integrity, efficiency, pragmatism, dedication" corporate spirit, dedication to society, and return to the public. From this perspective, the enterprise will have a bright future. In a good environment with strong hardware facilities and excellent management personnel, we can make sure that the company will develop stronger and bigger.
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