ISO 630 grade E355 quality D plates API standard 650 aboveground welded storage tanks

Inspection of low-pressure storage tank Butt-weldsComplete penetration and complete fusion is required (to the degree mandated by the acceptance criteria for examination method utilized) for welds joining tank wall plates to API standard 650 aboveground welded storage tanks tank wall plates. Examination for quality of welds shall be made using either the radiographic method specified in API 620 standard 7.15.1 and applied in 7.17, or alternatively, by agreement between the Purchaser and the Manufacturer, using the ultrasonic method specified in 7.15.3.1. In addition to the radiographic or ultrasonic examination, these welds shall also be visually examined as specified in 7.15.5. Furthermore, the Purchaser’s inspector may visually inspect all butt-welds for cracks, arc strikes, excessive undercuts, surface porosity, incomplete fusion, and other defects.

Floating roofs shall comply with API Standard 650, Appendix C (Attachment 01) or with the API standard 650 aboveground welded storage tanks requirements as layed (laid )down in the national Chinese specifications SH3046-92 and GBJ128-90.

BBN had provided API standard 650 aboveground welded storage tanks Hardox plates for more than 15 years for widely applied in coal mining machinery, cement equipment, road construction machinery, engineering machinery, dump trucks, metallurgical area and port fields. In 2016,we brought our customer to visit our API standard 650 aboveground welded storage tanks NM400 steel plate producing line and our Shanghai warehouse for 30000 tons plate and structure. As a result, Our client purchased 500 tons NM 400 as first order, which is shipped by 3 times. In future, BBN will always guarantee that all the delivery condition for Hardox plate provided will be with quenching and tempering, which is the best delivery type according GBT 24186 standard.

When the day light gradually decreases, the temperature of oil in the API standard 650 aboveground welded storage tanks will also decrease, the evaporation speed will gradually slow down, and the pressure in the API standard 650 aboveground welded storage tanks will also decrease. When the pressure in the API standard 650 aboveground welded storage tanks is lower than the negative pressure rating of the breathing valve, the outside air is sucked into the API standard 650 aboveground welded storage tanks through the open vacuum valve, which is the "suction" process of the oil tank.

Over the years, the company has strived for perfection, being well-received. By virtue of stable product performance, high-quality engineering effects and perfect service system, we have won the trust of many customers, and our engineering cases and after-sales service systems are spread all over the world. We regularly conduct quality tracking and return visits by phone and email, listen to customers' opinions, and continuously improve service quality.