API standard 650 aboveground welded storage tanks freeboard

Prefabrication requirements for API standard 650 aboveground welded 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 standard 650 aboveground welded 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.The inner layer of API 650 tank is the same as that of single layer tank. It is made of high-quality steel plate in strict accordance with the standard of "steel welded atmospheric pressure vessel". The thickness of API standard 650 aboveground welded storage tanks steel plate reaches the standard and the service life is longer.Service concept:Customer satisfaction is our value. Thank customers for their trust, respect their rights and interests, care about their needs, understand their concerns, realize their satisfaction and promote their success. Sincere and friendly, warm and thoughtful, relaxed and pleasant, considerate and tolerant. Attentive service, sincere care, professional excellence. The first-class famous products API standard 650 aboveground welded storage tanks at home and abroad gather, and the outstanding charm of the East and the West radiates! Specialization, standardization, refinement, kinship.We are known as API standard 650 aboveground welded storage tanks leading manufacturers, suppliers and exporters in the market all over the world. We engage in providing a wide range of plates which are accurately mass produced by using the best quality of parts which gives maximum durability and dependability. The most important thing to know as a potential customer of IRON&STEEL is that we API standard 650 aboveground welded storage tanks stock, processing service, and distribute all of the popular grades of carbon steel plate, alloy steel, shipbuilding steel and boiler steel. Welcome to come China and visit our factory.