API Std 650 larger diameter tanks welder

API Std 650 larger diameter tanks weld tightness test: remove dirt from the API Std 650 larger diameter tanks weld, apply white powder emulsion, spray kerosene on the other side of the weld after drying. Because of the strong penetration of kerosene, if kerosene is sprayed after 12 hours (under low temperature conditions, the time can be extended), if the surface of the welded seam coated with white emulsion has no spots, the welded seam meets the requirements.

The API Std 650 larger diameter tanks stiffener ring and backing strip (if used) are primary components, and they shall comply with the requirements of API 620 storage steel tank Q.2.1. The stiffener rings may be fabricated from plate using an intermittent weld on alternating sides between the web and the flange.
Except for aluminum or stainless steel tanks, all fillet welds shall consist of a minimum of two passes. The ends of the fillet welds shall be 2 in. from the rat hole (see Figure Q-1), and these welds shall be deposited by starting 2 in. from the rat hole and welding away from the rat hole. An acceptable alternative to the detail that includes stopping fillet welds 2 in. short of the rat hole would be to weld continuously through the rat hole from one side of the stiffener to the opposite side. All craters in fillet welds shall be repaired by back welding.

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

Group consciousness is an important psychological factor for the formation of enterprise internal cohesion. The formation of API Std 650 larger diameter tanks enterprise group consciousness makes every employee of the enterprise regard their work and behavior as an integral part of the realization of enterprise goals, make them feel proud of themselves as a member of the enterprise, have a sense of honor for the achievements of the enterprise, and thus regard the API Std 650 larger diameter tanks enterprise as the community and belonging of their own interests.

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