On-site welding of large storage tanks

This post was last edited by mchb on 2009-8-25 at 11:57. Take a look at these standards: API 650 | Welded steel oil storage tanks http://bbs.hcbbs.com/viewthread.php?tid=297891&highlight=API%20650%2B GB 50128-2005 | Specifications for the construction and acceptance of vertical cylindrical welded oil tanks http://bbs.hcbbs.com/viewthread.php?tid=5464&highlight=GB%2B50128-2005 SY/T 0606-2006 | Field-welded liquid storage tanks http://bbs.hcbbs.com/viewthread.php?tid=280391&highlight=SY%2FT%2B0606

The following points should be taken into account when welding large storage tanks on-site: 1. There must be a sufficiently large and flat area at the construction site to facilitate installation; 2. A crane is necessary for assistance; 3. It is important to check whether the contractor follows the GB 50128-2005 | Code for Construction and Acceptance of Vertical Cylindrical Welded Oil Tanks and SY/T 0606-2006 | Standards for On-Site Welding of Liquid Storage Tanks when carrying out the welding work; 4. Safety is of utmost importance when welding large storage tanks on-site. 5. It is necessary to ensure that all the required equipment is available at the construction site.

In my opinion, there are several points that need attention: 1) From a safety perspective: There are tasks such as lifting operations, work at heights, and construction inside enclosed containers. It is necessary to require the construction party to develop safety measures, with specific and feasible plans for lifting operations and work at heights. When working inside enclosed containers, special attention should be paid to ventilation, and fire prevention measures must be taken during anti-corrosion work. 2) From a technical perspective: When welding large containers on-site, it is important to ensure that the construction environment meets the technical requirements. Attention should also be paid to the proper arrangement of welding joints and to preventing deformation during welding. Inspection should be carried out during the construction process rather than only after it is completed, as some defects may become irreparable by then. Additionally, the foundation must be thoroughly inspected before starting construction, and work should only begin once all requirements are met.

A considerable amount of work equipment needs to be prepared. Since this has not been done before, it’s necessary to enlist the help of those who have experience in this area. The following points should be taken into consideration: 1. The foundation must pass the inspection; otherwise, it will create problems for subsequent construction and handover. 2. If the volume of work is large, prefabrication on-site is required. It’s important to discuss various issues related to the site with the client, such as the site itself, utilities, employee training, submission of necessary documents, and any other special requirements from the client. 3. Before starting work, it’s necessary to have all the tools and materials needed for constructing the equipment. 4. When planning the layout of the equipment’s base plate, some margin should be left. 5. It needs to be decided whether to install the equipment in reverse order or in normal order. 6. If insulation is part of the scope of work, it’s necessary to coordinate with the pipeline specialists to address any issues related to simultaneous construction activities. There are many more things to consider!!!!

Well, the most important thing is the fixture; it’s the fixture that prevents welding-induced deformation in large containers. Sometimes pre-deformation treatment may also be used. Also, attention should be paid to pressure tests, and the strength of the fixtures used for temporary sealing of the pipes must also be properly calculated.

The foundation is very important! There are also various inspection dimensions during assembly welding