API 650 self-anchored tank annular bottom plate thickness

Allowable Design Stresses
The maximum allowable design stresses for the API 650 self-anchored tank materials outlined in Q.2.1 shall be in accordance with Table Q-3.The values for the allowable design tensile stress given in Table Q-3 for materials other than bolting steel are the lesser of (a) 331/3% of the specified minimum ultimate tensile strength for the material or (b) 662/3% of the specified minimum yield strength, but they are 75% of the specified minimum yield strength for the stainless steel, nickel alloy, and aluminum materials. Allowable test stresses are based on the limitation of API 620 oil tank storage standard Q.8.1.3.For API 650 tanks Projection from outside of tank shell to extreme face of flange - plus or minus 5 mm. API 650 self-anchored tank Elevation or radial location - plus or minus 6 mm. API 650 tanks Flange tilt in any plane, measured on the diameter across the gasket surface - plus or minus degree but not exceeding 5 mm. Flange bolt hole orientation - plus or minus 2 mm.On September 14th 2019, a Australia customer purchased 500 tonsDIN17155 15Mo3 boiler steel plates, which will be used for vessel modification of wax backflow protection project and LPU project. Many old customers keep asking about Din17155 steel grade-15Mo3. Usually our company would suggest customers to choose EN10028 steel specification, but if customer insiste on the old steel grade, we could arrange it either. With years of experience in produceing DIN 17155 15Mo3 boiler steel plates, the company supplies high quality steel API 650 self-anchored tank product with low cost and better service.Generally speaking, the duration of the "exhalation" of the API 650 self-anchored tank is longer than that of the "inhalation" of the API 650 self-anchored tank every day. There are many factors affecting the "small breathing" loss, mainly including the following points: the change of temperature difference between day and night, sunshine time of the API 650 self-anchored tank location, open area of the API 650 self-anchored tank, atmospheric pressure, filling degree of API 650 self-anchored tank, etc. When the API 650 self-anchored tank is full of gas, the space volume is small, and the "small breathing" loss is less; if the space volume is large, the loss is also large.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.