How to test bottom seams of API 650 larger diameter tanks

The company adheres to the principle of integrity, standardization and efficiency, wins the market with technology, gains reputation with creative services, and wholeheartedly provides customers with high-quality API 650 larger diameter tanks, efficient and fast services. Facing the future, adhere to independent innovation.API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API 650 larger diameter tanks design metal temperatures no lower than the impact test temperature required by the ASTM specification for the applicable material grade without additional impact tests. For temperatures below those allowed by the ASTM specification, the following paragraph shall apply.Upon completion of construction, provide Purchaser with copies of Field Erected API 650 larger diameter tanks storage tank Datasheets in accordance with Appendix L of API 650, which reflects the as-built conditions, certifying that the tank conforms with the requirements of this specification.Aspire to technological innovation and pursue first-class quality steel API 650 larger diameter tanks products.Take independent innovation as an important support for the sustainable development of iron and steel industry, strengthen the main position of technological innovation, accelerate the original innovation, integrated innovation, introduction, digestion, absorption and re innovation, improve the technological innovation system, and cultivate the core technology and brand products of independent intellectual property rights.Inspection of weld and micro crack of API 650 larger diameter tanks: the inner and outer surface of API 650 larger diameter tanks, weld and heat affected zone shall be observed by naked eyes first. 100% ultrasonic testing or 100% penetrant testing are carried out for butt welds of API 650 larger diameter tanks. For the defects found by 100% magnetic particle inspection, dye detection, 100% ultrasonic inspection or 100% penetrant inspection, the radiographic inspection shall be used again to ensure the accuracy of the test results.