API 650 low-alloy steel tanks testing of the roof

Service Conditions and Hydrogen-induced Cracking
When the service conditions might include the presence of hydrogen sulfide or other conditions that may promote hydrogen-induced cracking effects, particularly near the bottom of the API 650 low-alloy steel tanks shell at the shell-to-bottom connections, care shall be taken to ensure that the materials and details of construction of the tank are adequate to resist hydrogen- induced cracking. The Purchaser shall consider restricting the sulphur content of the material to be stored through thickness testing of the steel, laboratory surveillance tests, and the use of internal tank coatings to reduce the possibility of hydrogen-induced cracking.

This API 650 tank standard is designed to provide industry with tanks of adequate safety and reasonable economy for use in the API 650 low-alloy steel tanks storage of petroleum, petroleum products. and other liquid products.

The Seamless Pipe Q345D to Thailand. In November of 2015, Thailand OTTO group contacted with us from Internet. They are finding the trustable supplier of S355/2H seamless pipe for the cable car supporter. Due to the special using of the pipes, they are very careful and serious when choosing the supplier. After one months contact and discussion by email, they come to our company. We drive to the pipe mill for visit of 2 days. Through this visit, they are very confident with our production ability and products quality. Finally, they accept the grade we suggest Q345D. After back to office, they put the order of 1800 tons pipe to us directly.

The specifications used in the design of large oil tanks, API 650 low-alloy steel tanks mainly include American Petroleum Institute Standard API 650, Japanese Industrial Standard JIS B8501, British Industrial Standard BS2654 and Chinese National Standard GB50341 from a global perspective. The formulas used in each specification are based on the hoop stress in the membrane theory. Each specification is based on the performance characteristics of materials and the construction technology level of their respective countries to determine the allowable stresses and weld coefficients. Therefore, the calculation results of tank wall thickness of API 650 low-alloy steel tanks with the same volume are sometimes quite different according to different specifications.

Responsibilities: dealing with quality feedback and complaints from Customer.Bebon has the after sale service department, which is responsible to solve the problem of technical support and quality, service complaints. You can also contact the company customers service online if you have any problem when you receive the products. The responsibility is to deal with quality feedback and complaints from Customer. Welcome to come and visit our company office.