Are there problems in manufacturing the 5,000 cubic meter EG storage tank?
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Our company is currently constructing an EG storage tank with a capacity of 5,000 cubic meters. What handover procedures are necessary to carry out in coordination with the civil engineering team before the tank is built? What are the written standards for such handovers? Also, regarding the welding of the bottom plate, the mid-section plates have been welded, but the tank as a whole appears to have wavy contours – is this a problem?
The information provided to the civil engineering team is the maximum weight of the tank and the position of the foot bolts; as for what you mentioned later, it’s not quite clear what that entails
For large-capacity storage tanks, the bottom plate requires a slope of 0.15%; designing it in an umbrella shape ensures this
It has something to do with the wavy shape, which causes unevenness at the bottom of the tank; welding deformation should be controlled.
There must be an acceptance report for the civil engineering foundation, along with the signature of the civil engineering supervisor. There might be issues with the reinforcement, so this needs to be taken into consideration.
Acceptance must be carried out in accordance with the requirements of standard G50341 or JB/T4735, as well as the civil engineering design documents; the base slab can only be laid after acceptance is successful. The manufacturer must carry out welding in strict accordance with the approved welding procedures and construction technical plans.
It has now been discovered that the panel welds are not fully filled, and there is misalignment as well
Three aspects need to be considered: 1. Check the unevenness of the surface of the base ring beam. 2 The unevenness of the moisture-proof layer on the bottom plate contact surface. 3 Density of the sand and gravel filling inside the ring beam. The welding deformation of medium-width plates is related to the welding process; a welding procedure should be developed based on the layout plan of the base plates. During welding, it is necessary to carry out welding in a staggered manner, and the continuous welding length per session should preferably not exceed 2 meters – minor deformation issues are not a major concern in such cases. Could you send a photo so it’s easier to diagnose?
Acceptance must be carried out in accordance with the requirements of standard G50341 or JB/T4735, as well as the civil engineering design documents; the base slab can only be laid after acceptance is successful. The manufacturer must carry out welding in strict accordance with the approved welding procedures and construction technical plans.
That is, after the medium-sized plates of the bottom plate are welded together, when viewed from a horizontal perspective, they form a single structure with large waves, comprising approximately 4 to 5 undulations
Another major problem was discovered today. According to the design requirements, the thickness should be 6 millimeters for the first two layers, and 8 millimeters for the layer below them. Yet they installed 6 millimeters again. Once the supervisor noticed this, he cut off their power supply
Judging from the problems you’ve encountered, this is not a legitimate construction team. Give them some time to make corrections (mainly regarding the team itself); otherwise, find another construction team.
Is there a construction organization plan? Construction plan? Layout diagram? Welding procedure qualification? Welder exam? If not, construction companies are required to carry out these tasks first; if they already exist, then they must be implemented properly!