API 650 tanks welding procedure and welder qualifications

Our company attaches great importance to technical support and after-sales service, and has established a customer service center to provide unified technical support and service for API 650 tanks various engineering projects. Customer service center has a strong technical force of technical service team, composed of a customer service center manager, several API 650 tanks after-sales service personnel, responsible for unified acceptance and processing of local after-sales service needs.

In the petrochemical industry and other industries, large vertical API 650 tanks are often used to store various production raw materials. Usually, the medium with high melting point and easy to crystallize at room temperature can be exported and used after heating, which involves the heating of large vertical storage tanks. The heating system is an auxiliary facility for heating of large vertical storage tank. It is often necessary to design external heating coil or internal heating coil system.

Uplift on Foundation
For API Standard 620 tanks with an internal design pressure less than 1 lbf/in.2 gauge, the uplift shall be taken as the smaller of the maximum uplift values computed under the following conditions:
a)The internal design pressure times 1.5 plus the design wind load on the shell and roof.
b)The internal design pressure plus 0.25 lbf/in.2 gauge plus the design wind load on the shell and roof.